CN207249047U - Capacitive casing high frequency partial discharge signal detection device - Google Patents
Capacitive casing high frequency partial discharge signal detection device Download PDFInfo
- Publication number
- CN207249047U CN207249047U CN201721241615.9U CN201721241615U CN207249047U CN 207249047 U CN207249047 U CN 207249047U CN 201721241615 U CN201721241615 U CN 201721241615U CN 207249047 U CN207249047 U CN 207249047U
- Authority
- CN
- China
- Prior art keywords
- metal shell
- high frequency
- end shield
- partial discharge
- signal processing
- 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.)
- Withdrawn - After Issue
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Abstract
It the utility model is related to capacitive casing high frequency partial discharge signal detection device.There is installation inconvenience in existing device, signal attenuation is big, detection efficiency is low, there are the defects of security risk.The utility model includes the signal pickup assembly and signal processing apparatus being threadedly coupled.Signal pickup assembly includes the first metal shell, end shield terminals, high frequency partial discharge sensor, and end shield terminals are located in the first metal shell, and high frequency partial discharge sensor is nested with end shield terminals, is fixed by horizontal annular baffle.Signal processing apparatus includes the second metal shell, signal processing circuit board, BNC connector, and signal processing circuit board is arranged in the second metal shell, and BNC connector is arranged on the second metal shell.The utility model shielding properties is superior, and good in anti-interference performance is safe and reliable, can long-time service, effectively adapt to site environment.
Description
Technical field
The utility model belongs to high pressure detection technique field, and in particular to a kind of capacitive casing high frequency partial discharge signal detection dress
Put.
Background technology
Casing failure is the one of the major reasons for causing electrical equipment fault to have a power failure.The state of insulation master of detection casing at present
If detected by tradition preventive trial, but the prerun test period is grown, it is difficult to find the potential event of operation middle sleeve in time
Barrier.In general, bottom shielding of bushing mainly has two kinds of structures, and one kind is external thread structure, and one kind is internal thread structure, and both of which is led to
Cross bottom shielding of bushing ground connection lid reliable ground.
Casing partial discharge detection mainly carries out high frequency Partial discharge signal collection by bottom shielding of bushing, has related personnel at present and grinds
Study carefully and a kind of device in bottom shielding of bushing collection signal, mainly change bottom shielding of bushing ground structure, extend bottom shielding of bushing ground connection
The modes such as line, gather the signals such as electric current, the phase of bottom shielding of bushing.There is installation inconvenience in existing device, signal attenuation is big, detects
Efficiency is low, there are the defects of security risk.
The content of the invention
The purpose of this utility model is aiming at the deficiencies in the prior art, there is provided a kind of capacitive casing high frequency Partial discharge signal inspection
Survey device.
The utility model includes the signal pickup assembly and signal processing apparatus being threadedly coupled.
It is same that the signal pickup assembly includes the first metal shell, end shield terminals, high frequency partial discharge sensor and high frequency
Shaft cable.
First metal shell and end shield terminals are cylindrical shape, and end shield terminals are located in the first metal shell,
System is integrally washed with the first metal shell；End shield terminals are connected with the first metal shell by connecting platform, end shield terminals with
Toroidal cavity is formed between first metal shell；It is provided with cable through hole on connecting platform, connecting platform is by the one of end shield terminals
End seal is closed.
The high frequency partial discharge sensor punching of circular ring shape is nested with end shield terminals, one end of coaxial cable for high frequency and high frequency
Partial discharge sensor connects, and the other end passes through cable through hole；The horizontal annular baffle of insulating materials is provided with toroidal cavity, it is horizontal
High frequency partial discharge sensor is fixed in toroidal cavity by ring baffle.
The inner wall on the top of first metal shell is tapped with internal thread, and the outer wall of lower part is externally threaded；End shield connects
The hat spring for fixed sleeving end shield exit is provided with line end.
The signal processing apparatus includes the second metal shell, signal processing circuit board, BNC connector, the second metal-back
Horizontal baffle is set in vivo, and the second metal shell integrally washes system with horizontal baffle；BNC connector is arranged on horizontal baffle, one end
Set through horizontal baffle；Second metal shell is the outer wall difference of the cylindrical shape of both ends open, its upper part and lower part
It is externally threaded.
The lower part of second metal shell is threadedly coupled with the top of the first metal shell, and the end face of connection is provided with
Sealing ring, forms cylindrical cavity after connection, signal processing circuit board is arranged on the cylindrical empty intracavitary, coaxial cable for high frequency
Another to terminate at signal processing circuit board input terminal, signal processing circuit board output terminal connects with the input terminal of BNC connector.Ground connection
The top of metal cap and the second metal shell can be threaded connection with, and BNC connector connects with grounded metal cap when covering.
In use, by the end shield terminals center inside the bottom shielding of bushing exit alignment signal collecting device of capacitive casing
Insertion, by rotating ground connection screw thread bottom shielding of bushing exit and internal hat spring reliable contacts, the first metal shell and casing
End shield ground connection lid is reliably connected so that bottom shielding of bushing exit is grounded cap-shaped into reliable earth-return circuit with bottom shielding of bushing, and leads to
The high frequency sensors detection high frequency Partial discharge signal that punching is sleeved on earth-return circuit is crossed, in the case where not changing original earthing mode
Form most short grounding path.
The utility model uses integrated sealing structure, and shielding properties is superior, good in anti-interference performance, and each component contact can
Lean on, can guarantee that effective grounding, and oil resistant, solvent resistant and high-low temperature resistant, it is safe and reliable, can long-time service, effectively adapt to existing
Field environment.And the device is equipped with scalable hat spring, with applicability is good, pull out force is soft, contact resistance is small, conducts electricity very well, resists
The features such as shake, impact resistance, reliable stable connection, can be suitably used for the bottom shielding of bushing exit of different structure size.Separately can be according to reality
Border transformer end shield size needs to match somebody with somebody screw thread modular converter, and the module replacing is convenient, and contact is reliable, and it is big to can be suitably used for sizes
The bottom shielding of bushing ground connection lid of small structure, has a wide range of application.Whole device does not change the original earthing mode of bottom shielding of bushing, and not
Most short grounding path is formed in the case of changing original earthing mode, easy for installation, signal attenuation is small.Special high frequency built in device
Partial discharge sensor, detects bandwidth, high sensitivity, and built-in special signal processing circuit, and detection efficiency is high.
Brief description of the drawings
Fig. 1 is detection device monnolithic case figure；
Fig. 2 is the structure diagram of the utility model.
Embodiment
As shown in Figure 1, capacitive casing high frequency partial discharge signal detection device, include 1 He of signal pickup assembly of threaded connection
Signal processing apparatus 2.
As shown in Fig. 2, signal pickup assembly 1 includes the first metal shell 1-1, end shield terminals 1-2, high frequency partial discharge sensing
Device 1-3 and coaxial cable for high frequency 1-4.
First metal shell 1-1 and end shield terminals 1-2 is cylindrical shape, and end shield terminals 1-2 is located at the first metal shell
In 1-1, system is integrally washed with the first metal shell 1-1；End shield terminals 1-2 and the first metal shell 1-1 pass through connecting platform 1-5
Connect, toroidal cavity is formed between end shield terminals 1-2 and the first metal shell 1-1；Cable is provided with connecting platform 1-5 to lead to
Hole, connecting platform 1-5 close one end of end shield terminals 1-2；
The high frequency partial discharge sensor 1-3 punchings of circular ring shape are nested with end shield terminals 1-2, coaxial cable for high frequency 1-4's
One end connects with high frequency partial discharge sensor 1-3, and the other end passes through cable through hole；The level of insulating materials is provided with toroidal cavity
High frequency partial discharge sensor 1-3 is fixed in toroidal cavity by ring baffle 1-6, horizontal annular baffle 1-6；
The inner wall on the top of the first metal shell 1-1 is tapped with internal thread, and the outer wall of lower part is externally threaded；End shield terminals
The hat spring 1-7 for fixed sleeving end shield exit is provided with 1-2.
Signal processing apparatus 2 includes the second metal shell 2-1, signal processing circuit board 2-2, BNC connector 2-3, the second gold medal
Belonging in housing 2-1 sets horizontal baffle 2-4, the second metal shell 2-1 and horizontal baffle 2-4 integrally to wash system；BNC connector 2-3 is set
Put on horizontal baffle 2-4, one end is set through horizontal baffle 2-4, for the signal transmission tremendously high frequency office for handling device well
Detector is put to be analyzed；Second metal shell 2-1 is the cylindrical shape of both ends open, and the outer wall of its upper part and lower part is tapped with respectively
External screw thread.
The lower part of second metal shell 2-1 is threadedly coupled with the top of the first metal shell 1-1, and the end face of connection is provided with
Sealing ring 4, forms cylindrical cavity after connection, signal processing circuit board 2-2 is arranged on the cylindrical empty intracavitary, high frequency coaxial electricity
The another of cable 1-4 terminates at signal processing circuit board 2-2 input terminals, signal processing circuit board 2-2 output terminals and BNC connector 2-3
Input terminal connect.
Grounded metal cap 3 and the top of the second metal shell 2-1 can be threaded connection with, and wiring work is not required in BNC connector 2-3
When making, grounded metal cap 3 is covered, as sealing waterproof, while the interference of maskable external signal.When covering, BNC connector 2-
3 connect with grounded metal cap 3, are grounded BNC connector 2-3.
In work, if the end shield ground connection lid 5 of transformer is internal thread, the bottom shielding of bushing exit 6 of transformer is stretched into
End shield terminals 1-2, while the first metal shell 1-1 is directly threadedly coupled with end shield ground connection lid 5, you can start to test.Such as
The end shield ground connection lid 5 of fruit transformer is external screw thread, then connects the first metal shell 1-1 with end shield by internal and external threads bridgeware 7
Ground lid 5 is threadedly coupled.
The more springs of beryllium-bronze built in the hat spring of use are simultaneously connected with twill, resilientiy stretchable are carried, suitable for sizes
Bottom shielding of bushing exit, and allow to plug, compared to plain clamp structure, has good applicability, high reliability, the pull out force soft
With, contact resistance is small, conduct electricity very well, antidetonation, impact resistance, it is stable and firm the features such as.
High frequency partial discharge sensor uses special high frequency magnetic core, frequency band 10kHz-60MHz is detected, compared to common Roche line
Circle, possesses the advantages that detection bandwidth, high sensitivity.
Coaxial cable for high frequency uses dedicated high-frequency signal transmission wire, the high frequency partial discharge that high frequency partial discharge sensor is detected
Signal transmission is analyzed and processed to signal processing circuit, and transmission range is short, and signal attenuation is small.
Signal processing circuit board 2-2 uses low distortion, high-speed transitions, the special Partial discharge signal process circuit of high sampling rate,
Signal modulation, amplification, A/D conversions, valid data extraction etc. directly can be carried out to the electric signal of high frequency sensors output.
In use, the end shield terminals center by the bottom shielding of bushing exit alignment signal collecting inside modules of capacitive casing
Insertion, by rotating ground connection screw thread bottom shielding of bushing exit and internal hat spring reliable contacts, the first metal shell and casing
End shield ground connection lid is reliably connected so that bottom shielding of bushing exit is grounded cap-shaped into reliable earth-return circuit with bottom shielding of bushing, and leads to
The high frequency sensors detection high frequency Partial discharge signal that punching is sleeved on earth-return circuit is crossed, in the case where not changing original earthing mode
Form most short grounding path.
Claims (1)
1. capacitive casing high frequency partial discharge signal detection device, includes the signal pickup assembly (1) and signal processing device of threaded connection
Put (2)；It is characterized in that：
The signal pickup assembly (1) includes the first metal shell (1-1), end shield terminals (1-2), high frequency partial discharge sensor
(1-3) and coaxial cable for high frequency (1-4)；
First metal shell (1-1) and end shield terminals (1-2) is cylindrical shape, and end shield terminals (1-2) are located at first
In metal shell (1-1), with the overall system of washing of the first metal shell (1-1)；End shield terminals (1-2) and the first metal shell (1-
1) connected by connecting platform (1-5), toroidal cavity is formed between end shield terminals (1-2) and the first metal shell (1-1)；Even
Connect and cable through hole is provided with platform (1-5), connecting platform (1-5) closes one end of end shield terminals (1-2)；
High frequency partial discharge sensor (1-3) punching of circular ring shape is nested with end shield terminals (1-2), coaxial cable for high frequency (1-4)
One end connect with high frequency partial discharge sensor (1-3), the other end passes through cable through hole；Insulating materials is provided with toroidal cavity
High frequency partial discharge sensor (1-3) is fixed in toroidal cavity by horizontal annular baffle (1-6), horizontal annular baffle (1-6)；
The inner wall on the top of first metal shell (1-1) is tapped with internal thread, and the outer wall of lower part is externally threaded；End shield connects
The hat spring (1-7) for fixed sleeving end shield exit is provided with line end (1-2)；
The signal processing apparatus (2) includes the second metal shell (2-1), signal processing circuit board (2-2), BNC connector (2-
3) horizontal baffle (2-4), is set in the second metal shell (2-1), and the second metal shell (2-1) is overall with horizontal baffle (2-4)
The system of washing；BNC connector (2-3) is arranged on horizontal baffle (2-4), and one end is set through horizontal baffle (2-4)；Second gold medal
Belong to the cylindrical shape that housing (2-1) is both ends open, the outer wall of its upper part and lower part is externally threaded respectively；
The lower part of second metal shell (2-1) is threadedly coupled with the top of the first metal shell (1-1), the end face of connection
Sealing ring (4) is provided with, cylindrical cavity is formed after connection, signal processing circuit board (2-2) is arranged on the cylindrical empty intracavitary,
The another of coaxial cable for high frequency (1-4) terminates at signal processing circuit board (2-2) input terminal, and signal processing circuit board (2-2) is defeated
Outlet connects with the input terminal of BNC connector (2-3)；
Grounded metal cap (3) and the top of the second metal shell (2-1) can be threaded connection with, BNC connector (2-3) and ground connection when covering
Metal cap (3) connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721241615.9U CN207249047U (en) | 2017-09-26 | 2017-09-26 | Capacitive casing high frequency partial discharge signal detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721241615.9U CN207249047U (en) | 2017-09-26 | 2017-09-26 | Capacitive casing high frequency partial discharge signal detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207249047U true CN207249047U (en) | 2018-04-17 |
Family
ID=61886871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721241615.9U Withdrawn - After Issue CN207249047U (en) | 2017-09-26 | 2017-09-26 | Capacitive casing high frequency partial discharge signal detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207249047U (en) |
-
2017
- 2017-09-26 CN CN201721241615.9U patent/CN207249047U/en not_active Withdrawn - After Issue
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180417 Effective date of abandoning: 20230801 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20180417 Effective date of abandoning: 20230801 |