CN208767143U - Quadruplet pipe elbow-type head earthed voltage transformer primary shielding structure - Google Patents
Quadruplet pipe elbow-type head earthed voltage transformer primary shielding structure Download PDFInfo
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- CN208767143U CN208767143U CN201821534784.6U CN201821534784U CN208767143U CN 208767143 U CN208767143 U CN 208767143U CN 201821534784 U CN201821534784 U CN 201821534784U CN 208767143 U CN208767143 U CN 208767143U
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- end cap
- connecting rod
- thickness
- screening cage
- external terminal
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Abstract
The utility model discloses a kind of Quadruplet pipe elbow-type head earthed voltage transformer primary shielding structures, belong to voltage transformer technical field, it is characterized by: including at least: inner terminal, external terminal and screening cage, inner terminal includes integrally formed end cap and connecting rod, end cap and connecting rod are cylindrical structure, and the two is coaxial；The outer diameter of end cap is greater than the outer diameter of connecting rod；Through-hole is offered on the central axis of inner terminal；External terminal includes cylindrical end body, holds one end of body to offer blind hole, is fixedly connected by screw thread with end body after connecting rod insertion blind hole；Screening cage includes cylindrical tube part, and the contraction that bends inwards of one end of cylindrical tube is encircled into a circular hole；The side wall of cylindrical tube includes the overlapping region for shielding the single-layer portions of thickness of net with a thickness of one layer and shielding thickness of net with a thickness of two layers；Overlapping region is equipped with tin welding spot；End cap is located in screening cage, and the external terminal is located at outside screening cage.This patent effectively shields high voltage electric field, improves capacitance profile.
Description
Technical field
The utility model belongs to voltage transformer technical field more particularly to a kind of Quadruplet pipe elbow-type head ground voltage mutual inductance
Device primary shielding structure.
Background technique
It is well known that voltage transformer (PT), also there is abbreviation TV and YH, it is measuring instrumentss in electric system, relay
The secondary devices such as protection obtain the sensor of electrical primary loop voltage information.High voltage is converted into low-voltage by PT in proportion,
That is 100V, 100/ √ 3V and 100/3V, PT is once flanked in primary system, secondary to flank measuring instrumentss, relay protection etc.；Mainly
It is electromagnetic type (capacitance type potential transformer is widely used), separately there is non electromagnetic, such as electronic type, photo-electric.
Regulation local discharge test should carry out under induced voltage in mutual inductor standard GB20840, and earthed voltage transformer office
Zoom level requires 1.2Um≤50pc, 3≤20pc of 1.2Um/ √.But in recent years with the publication that south electric network requires, to mutual inductor
Performance requirement be increasingly stringenter, it is desirable that partial discharge < 10PC even < 5PC, and due to the acceptance criteria of different manufacturers difference, remove
Consider that partial discharge is qualified outer under induced test, also requires partial discharge under industrial frequency experiment to meet the requirements.
Utility model content
In view of the drawbacks of the prior art, the utility model provides a kind of Quadruplet pipe elbow-type head earthed voltage transformer and once shields
Shield structure.The special construction of the utility model combination elbow-type head mutual inductor devises interior external terminal and the (shielding of cartridge type gauze screen
Cage).Barrel type gauze screen will be mounted on one entirety of formation, this design between interior external terminal and can effectively shield high voltage electric field, change
Kind capacitance profile.It can satisfy the requirement of partial discharge under industrial frequency experiment voltage.
Used by the utility model the specific technical proposal is:
A kind of Quadruplet pipe elbow-type head earthed voltage transformer primary shielding structure, includes at least:
Inner terminal (1), the inner terminal (1) include integrally formed end cap (1-1) and connecting rod (1-2), the end cap
(1-1) and connecting rod (1-2) are cylindrical structure, and the two is coaxial；The outer diameter of the end cap (1-1) is greater than connecting rod (1-2)
Outer diameter；Through-hole (1-3) is offered on the central axis of the inner terminal (1)；
External terminal (2), the external terminal (2) include cylindrical end body (2-1), are opened in one end of the end body (2-1)
Equipped with blind hole (2-2), connecting rod (1-2) insertion blind hole (2-2) is fixedly connected by screw thread with end body (2-1) afterwards；
The screening cage made of rectangular shield net (3), the screening cage (3) includes cylindrical tube part, the cylindrical tube
One end contraction that bends inwards is encircled into a circular hole；The side wall of the cylindrical tube includes the single layer that thickness of net is shielded with a thickness of one layer
Part and the overlapping region (5) that thickness of net is shielded with a thickness of two layers；Tin welding spot (4) are equipped in the overlapping region (5)；The end
Cap (1-1) is located in screening cage (3), and the external terminal (2) is located at screening cage (3) outside, and the circular hole is located at end cap (1-1) and end
The binding site of body (2-1).
The advantages of the utility model and good effect are as follows:
By using above-mentioned technical proposal, the utility model is had the following technical effect that:
1, shield effectiveness is good；It can control the partial discharge < 5PC under 1.2Um voltage of the voltage transformer after forming.
2, strong operability: wire netting being required after cutting out according to size, i.e., can be made of shaping welding positioner,
It is easy to operate, it is suitble to produce in enormous quantities.
3, easy for installation: the screening cage that will be made is mounted on interior external terminal, then is sleeved on die core axle.
4, it can be not only used for the product, can be also used for similar elbow-type head product of voltage, strong applicability.
Detailed description of the invention
Fig. 1 is the structure chart of utility model preferred embodiment；
Fig. 2 is the half-sectional sectional view of inner terminal in utility model preferred embodiment；
Fig. 3 is the half-sectional sectional view of external terminal in utility model preferred embodiment；
Fig. 4 is the structure chart of screening cage in utility model preferred embodiment；
Fig. 5 is the connection figure of inner terminal and external terminal in utility model preferred embodiment；
Fig. 6 is that utility model preferred embodiment elbow-type head earthed voltage transformer pours building body structure chart；
Fig. 7 is the enlarged drawing of part A in Fig. 6.
Wherein: 1, inner terminal；1-1, end cap；1-2, connecting rod；1-3, through-hole；2, external terminal；2-1, end body；It is 2-2, blind
Hole；3, screening cage；4, tin welding spot；5, overlapping region；6, resin sleeve.
Specific embodiment
For the invention, features and effects that can further appreciate that the utility model, the following examples are hereby given, and cooperates
Detailed description are as follows for attached drawing.
The structure of the utility model is explained in detail with reference to the accompanying drawing.
Fig. 1 is please referred to Fig. 7: a kind of Quadruplet pipe elbow-type head earthed voltage transformer primary shielding structure, comprising:
Inner terminal 1, the inner terminal 1 include integrally formed end cap 1-1 and connecting rod 1-2, the end cap 1-1 and connection
Bar (1-2) is cylindrical structure, and the two is coaxial；The outer diameter of the end cap 1-1 is greater than the outer diameter of connecting rod 1-2；Described interior
Through-hole 1-3 is offered on the central axis of terminal (1)；
External terminal 2, the external terminal 2 include cylindrical end body 2-1, offer blind hole in one end of the end body 2-1
It is fixedly connected by screw thread with end body 2-1 after 2-2, the connecting rod 1-2 insertion blind hole 2-2；
The screening cage 3 made of rectangular shield net, the screening cage 3 include cylindrical tube part, one end of the cylindrical tube
The contraction that bends inwards is encircled into a circular hole；The side wall of the cylindrical tube includes the single-layer portions that thickness of net is shielded with a thickness of one layer
With the overlapping region 5 for shielding thickness of net with a thickness of two layers；Tin welding spot 4 is equipped in the overlapping region 5；The end cap 1-1 is located at
In screening cage 3, the external terminal 2 is located at outside screening cage 3, and the circular hole is located at end cap 1-1 and holds the binding site of body 2-1.
Terminal and gauze screen is integrated poured in casing.It, can when fuse connect with inner terminal and has voltage to pass through
The capacitance profile formed between fuse and mutual inductor body is effectively shielded, improves field strength, to reach reduction industrial frequency experiment
The purpose of lower partial discharge.
A terminal of product thus shown in Fig. 1, can effectively fix cartridge type gauze screen using interior external terminal fission mode, i.e.,
Screening cage.Cartridge type gauze screen requires after cutting out according to size, i.e., can be made of shaping welding positioner.It will folding when production
Avris rolls on the inside of cylinder, with scolding tin firm welding, it is desirable that tin welding spot is smooth, smooth, impulse- free robustness, easy to operate, is suitble to big
Batch production.
Gauze screen and terminal are installed together, as shown in Figure 3.The method can effective fixed mask net, will screen when die-filling
Net cover is covered on mould casing mandrel, fixes a terminal.This technique can effectively shield high voltage electric field, improve capacitor
Distribution.To which the partial discharge numerical value under industrial frequency withstand voltage greatly reduce, meets the needs of client.
The above is only the preferred embodiment to the utility model, is not made in any form to the utility model
Limitation, it is all according to the technical essence of the utility model any simple modification made to the above embodiment, equivalent variations with
Modification, is all within the scope of the technical scheme of the utility model.
Claims (1)
1. a kind of Quadruplet pipe elbow-type head earthed voltage transformer primary shielding structure, it is characterised in that: include at least:
Inner terminal (1), the inner terminal (1) include integrally formed end cap (1-1) and connecting rod (1-2), the end cap (1-1)
It is cylindrical structure with connecting rod (1-2), and the two is coaxial；The outer diameter of the end cap (1-1) is outer greater than connecting rod (1-2)
Diameter；Through-hole (1-3) is offered on the central axis of the inner terminal (1)；
External terminal (2), the external terminal (2) include cylindrical end body (2-1), are offered in one end of the end body (2-1)
Blind hole (2-2), connecting rod (1-2) insertion blind hole (2-2) are fixedly connected by screw thread with end body (2-1) afterwards；
The screening cage made of rectangular shield net (3), the screening cage (3) includes cylindrical tube part, one end of the cylindrical tube
The contraction that bends inwards is encircled into a circular hole；The side wall of the cylindrical tube includes the single-layer portions that thickness of net is shielded with a thickness of one layer
With the overlapping region (5) for shielding thickness of net with a thickness of two layers；Tin welding spot (4) are equipped in the overlapping region (5)；The end cap
(1-1) is located in screening cage (3), and the external terminal (2) is located at screening cage (3) outside, and the circular hole is located at end cap (1-1) He Duanti
The binding site of (2-1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821534784.6U CN208767143U (en) | 2018-09-19 | 2018-09-19 | Quadruplet pipe elbow-type head earthed voltage transformer primary shielding structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821534784.6U CN208767143U (en) | 2018-09-19 | 2018-09-19 | Quadruplet pipe elbow-type head earthed voltage transformer primary shielding structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208767143U true CN208767143U (en) | 2019-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821534784.6U Active CN208767143U (en) | 2018-09-19 | 2018-09-19 | Quadruplet pipe elbow-type head earthed voltage transformer primary shielding structure |
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| CN (1) | CN208767143U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108987081A (en) * | 2018-09-19 | 2018-12-11 | 天津市百利纽泰克电气科技有限公司 | Quadruplet pipe elbow-type head earthed voltage transformer primary shielding structure |
-
2018
- 2018-09-19 CN CN201821534784.6U patent/CN208767143U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108987081A (en) * | 2018-09-19 | 2018-12-11 | 天津市百利纽泰克电气科技有限公司 | Quadruplet pipe elbow-type head earthed voltage transformer primary shielding structure |
| CN108987081B (en) * | 2018-09-19 | 2024-03-08 | 天津市百利纽泰克电气科技有限公司 | Primary shielding structure of four-sleeve elbow-type head grounding voltage transformer |
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