CN207249048U - Capacitive bottom shielding of bushing signal supervisory instrument - Google Patents
Capacitive bottom shielding of bushing signal supervisory instrument Download PDFInfo
- Publication number
- CN207249048U CN207249048U CN201721243279.1U CN201721243279U CN207249048U CN 207249048 U CN207249048 U CN 207249048U CN 201721243279 U CN201721243279 U CN 201721243279U CN 207249048 U CN207249048 U CN 207249048U
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- CN
- China
- Prior art keywords
- metal shell
- low frequency
- signal
- end shield
- high frequency
- 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- Withdrawn - After Issue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 bottom shielding of bushing signal supervisory instrument.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 low frequency dielectric loss sensor, and end shield terminals are located in the first metal shell, and high frequency partial discharge sensor and low frequency dielectric loss sensor are nested with end shield terminals.Signal processing apparatus includes the second metal shell, high-frequency signal modulate circuit plate, low frequency signal modulate circuit plate, high frequency BNC connector, low frequency BNC connector, high-frequency signal modulate circuit plate and low frequency signal modulate circuit plate are 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 bottom shielding of bushing signal supervisory instrument.
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 bottom shielding of bushing signal detection dress
Put.
The utility model includes the signal pickup assembly and signal processing apparatus being threadedly coupled.
The signal pickup assembly includes the first metal shell, end shield terminals, high frequency partial discharge sensor and low frequency and is situated between
Damage sensor.
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, and connecting platform is by end
Shield one end closing of terminals, toroidal cavity is formed between end shield terminals and the first metal shell.
The horizontal annular baffle of insulating materials is provided with toroidal cavity, toroidal cavity is divided into two by horizontal annular baffle
Space, high frequency partial discharge sensor and low frequency dielectric loss sensor are separately positioned in two spaces, and punching is nested with end shield wiring
On end；One end of coaxial cable for high frequency connects with high frequency partial discharge sensor, one end and the low frequency dielectric loss sensor of low frequency signal line
Connection.
The inner wall on the top of the first metal shell is tapped with internal thread, and the outer wall of lower part is externally threaded；In end shield terminals
It is provided with the hat spring for fixed sleeving end shield exit.
The signal processing apparatus includes the second metal shell, high frequency BNC connector, low frequency BNC connector, high-frequency signal tune
Manage circuit board, low frequency signal modulate circuit plate；Horizontal baffle, the second metal shell and horizontal baffle are set in the second metal shell
The entirety system of washing；High frequency BNC connector and low frequency BNC connector are disposed side by side on horizontal baffle, and one end is set through horizontal baffle, are used
Analyzed in the signal transmission tremendously high frequency partial discharge detection instrument for handling device well or opposite dielectric loss measuring instrument；Second metal shell
For the cylindrical shape of both ends open, the outer wall of its upper part and lower part is externally threaded respectively.
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, high-frequency signal modulate circuit plate and low frequency signal modulate circuit plate are arranged on the circle
In cylindrical cavity；Another input terminal for terminating at high-frequency signal modulate circuit plate of coaxial cable for high frequency, high-frequency signal conditioning electricity
The output terminal of road plate connects with the input terminal of high frequency BNC connector；The another of low frequency signal line terminates at low frequency signal modulate circuit
The input terminal of plate, the output terminal of low frequency signal modulate circuit plate connect with the input terminal of low frequency BNC connector.
Grounded metal cap and the top of the second metal shell can be threaded connection with.When covering, high frequency BNC connector and low frequency BNC
Connector connects with grounded metal cap.
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, not
Most short grounding path is formed in the case of changing original earthing mode.
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 and low frequency dielectric loss sensor, detect bandwidth, high sensitivity, and built-in special signal processing circuit, detection effect
Rate 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 bottom shielding of bushing signal supervisory instrument, include the signal pickup assembly 1 and signal of threaded connection
Processing unit 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 low frequency dielectric loss sensor 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, connecting platform 1-5 closes one end of end shield terminals 1-2, between end shield terminals 1-2 and the first metal shell 1-1
Form toroidal cavity.
Horizontal annular the baffle 1-6, horizontal annular baffle 1-6 that insulating materials is provided with toroidal cavity divide toroidal cavity
Into two spaces, high frequency partial discharge sensor 1-3 and low frequency dielectric loss sensor 1-4 are separately positioned in two spaces, and punching set
Put on end shield terminals 1-2.One end of coaxial cable for high frequency connects with high frequency partial discharge sensor 1-3, and the one of low frequency signal line
End is connected with low frequency dielectric loss sensor 1-4；
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, high frequency BNC connector 2-2, low frequency BNC connector 2-3, high frequency letter
Number modulate circuit plate 2-4, low frequency signal modulate circuit plate 2-5.Horizontal baffle 2-6, the second gold medal are set in the second metal shell 2-1
Belong to housing 2-1 and horizontal baffle 2-6 and integrally wash system；High frequency BNC connector 2-2 and low frequency BNC connector 2-3 be disposed side by side on it is horizontal every
On plate 2-6, one end is set through horizontal baffle 2-6, for the signal transmission tremendously high frequency partial discharge detection instrument of handling device well or
Analyzed with respect to dielectric loss measuring instrument.Second metal shell 2-1 is the outer wall point of the cylindrical shape of both ends open, its upper part and lower part
It is not externally threaded.
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, high-frequency signal modulate circuit plate 2-4 and low frequency signal modulate circuit plate 2-5 are set
In the cylindrical empty intracavitary；Another input terminal for terminating at high-frequency signal modulate circuit plate 2-4 of coaxial cable for high frequency, high frequency letter
The output terminal of number modulate circuit plate 2-4 connects with the input terminal of high frequency BNC connector 2-2；Low frequency signal line it is another terminate at it is low
The input terminal of frequency signal conditioning circuit plate 2-5, the output terminal of low frequency signal modulate circuit plate 2-5 are defeated with low frequency BNC connector 2-3's
Enter end to 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
When, grounded metal cap 3 is covered, as sealing waterproof, while the interference of maskable external signal.When covering, BNC connector is with connecing
Ground metal cap 3 connects, and is grounded BNC connector.
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.
High-frequency signal modulate circuit plate and low frequency signal modulate circuit plate are using low distortion, high-speed transitions, high sampling rate
Special Partial discharge signal process circuit, can directly to high frequency sensors output electric signal carry out signal modulation, amplification, A/D conversion,
Valid data extraction etc..
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 bottom shielding of bushing signal supervisory instrument, includes the signal pickup assembly (1) and signal processing apparatus of threaded connection
(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 low frequency dielectric loss sensor (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), connecting platform (1-5) closes one end of end shield terminals (1-2), end shield terminals
Toroidal cavity is formed between (1-2) and the first metal shell (1-1)；
The horizontal annular baffle (1-6) of insulating materials is provided with toroidal cavity, horizontal annular baffle (1-6) divides toroidal cavity
Into two spaces, high frequency partial discharge sensor (1-3) and low frequency dielectric loss sensor (1-4) are separately positioned in two spaces, and are worn
The heart is nested with end shield terminals (1-2)；One end of coaxial cable for high frequency connects with high frequency partial discharge sensor (1-3), low frequency letter
One end of number line is connected with low frequency dielectric loss sensor (1-4)；
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)；
The signal processing apparatus (2) includes the second metal shell (2-1), high frequency BNC connector (2-2), low frequency BNC connector
(2-3), high-frequency signal modulate circuit plate (2-4), low frequency signal modulate circuit plate (2-5)；Set in second metal shell (2-1)
Horizontal baffle (2-6), the second metal shell (2-1) and the overall system of washing of horizontal baffle (2-6)；High frequency BNC connector (2-2) and low frequency
BNC connector (2-3) is disposed side by side on horizontal baffle (2-6), and one end is set through horizontal baffle (2-6), for by device
The signal transmission tremendously high frequency partial discharge detection instrument or opposite dielectric loss measuring instrument managed are analyzed；Second metal shell (2-1) is two
The outer wall of the open cylindrical shape in end, 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, high-frequency signal modulate circuit plate (2-4) and low frequency signal conditioning electricity are formed after connection
Road plate (2-5) is arranged on the cylindrical empty intracavitary；The another of coaxial cable for high frequency terminates at high-frequency signal modulate circuit plate (2-4)
Input terminal, the output terminal of high-frequency signal modulate circuit plate (2-4) connects with the input terminal of high frequency BNC connector (2-2)；Low frequency is believed
Another input terminal for terminating at low frequency signal modulate circuit plate (2-5) of number line, the output of low frequency signal modulate circuit plate (2-5)
End connects with the input terminal of low frequency BNC connector (2-3)；
Grounded metal cap (3) and the top of the second metal shell (2-1) can be threaded connection with, when covering, high frequency BNC connector (2-2)
Connect with low frequency BNC connector (2-3) with grounded metal cap (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721243279.1U CN207249048U (en) | 2017-09-26 | 2017-09-26 | Capacitive bottom shielding of bushing signal supervisory instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721243279.1U CN207249048U (en) | 2017-09-26 | 2017-09-26 | Capacitive bottom shielding of bushing signal supervisory instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207249048U true CN207249048U (en) | 2018-04-17 |
Family
ID=61886965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721243279.1U Withdrawn - After Issue CN207249048U (en) | 2017-09-26 | 2017-09-26 | Capacitive bottom shielding of bushing signal supervisory instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207249048U (en) |
-
2017
- 2017-09-26 CN CN201721243279.1U patent/CN207249048U/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: 20230530 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20180417 Effective date of abandoning: 20230530 |