CN104101746A - Magnetic shielding structural part of magnetic modulation voltage transducer - Google Patents
Magnetic shielding structural part of magnetic modulation voltage transducer Download PDFInfo
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- CN104101746A CN104101746A CN201410354355.0A CN201410354355A CN104101746A CN 104101746 A CN104101746 A CN 104101746A CN 201410354355 A CN201410354355 A CN 201410354355A CN 104101746 A CN104101746 A CN 104101746A
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Abstract
The invention discloses a magnetic shielding structural part of a magnetic modulation voltage transducer. The magnetic shielding structural part comprises a base, a cover housing, an upper shielding plate, a shielding sleeve and a lower shielding plate. The base comprises a base plate, wherein a cylinder with an open upper end is fixed on the base plate, the lower shielding plate is fixed at the bottom in the cylinder, the upper shielding plate is fixed at the upper portion in the cylinder, and the lower shielding plate, the cylinder and the upper shielding plate define an internal cavity. The shielding sleeve is fixed outside the cylinder in a sleeved. The upper shielding plate, the lower shielding plate and the shielding sleeve are made from silicon steel. The cover housing is fixed with the base, the cover housing covers the cylinder and the shielding sleeve, and the top face of the cover housing is provided with a wire penetrating hole communicated with the internal cavity. The magnetic shielding structural part is provided with a shielding space defined by the upper shielding plate, the lower shielding plate and the shielding sleeve, prevents an external magnetic field from interfering magnetic circuit parts in the shielding space and is good in shielding effect, compact in shielding structure and low in manufacturing cost.
Description
Technical field
The present invention relates to voltage sensor, particularly a kind of magnet shielding structure part for magnetic modulation voltage sensor.
Background technology
Voltage sensor based on magnetic modulation principle, by high magnetic conduction annular Rhometal coil, electronic circuit etc., formed, utilize the alternately saturation characteristic of high conducting magnet core under internal side wave voltage incentive action, the current signal that can fast former limit measuring voltage be produced, by waiting ampere-turn principle fast modulation to secondary winding, makes secondary winding output current can accurately follow the variation of original edge voltage signal.
Because the magnetic circuit part of magnetic modulation voltage sensor is more responsive for the impact of external magnetic field, therefore magnet assembly being carried out to magnetic field shielding is one of gordian technique of magnetic modulation voltage sensor.The conventional method that existing magnetic modulation voltage sensor solves magnetic interference is the guard shield inner side spraying that secondary winding is installed to be had to the enamelled coating of shield effectiveness, make it have shield effectiveness, yet through the test of radio frequency electromagnetic field space radiation immunity to interference, its shield effectiveness is unsatisfactory, and shielding enamelled coating may, to the signal coupling between former secondary winding, affect measuring accuracy.
Summary of the invention
Technical matters to be solved by this invention is overcome the above-mentioned deficiency of prior art and a kind of magnet shielding structure part for magnetic modulation voltage sensor is provided, the shielding space surrounding with upper barricade, lower barricade, bell housing etc. in magnet shielding structure part, prevent the interference of external magnetic field to the magnetic circuit component in shielding space, shield effectiveness is good, and shielding construction is compact, low cost of manufacture.
The present invention addresses the above problem adopted technical scheme: the magnet shielding structure part of magnetic modulation voltage sensor, comprises pedestal, case, upper barricade, bell housing, lower barricade; Pedestal comprises base plate, the fixing cylinder of upper end open on base plate, and the fixing lower barricade in bottom in cylinder, the fixing upper barricade in top in cylinder, lower barricade, cylinder, upper barricade surround internal cavities; Cylinder is fixing suit bell housing outward; Upper barricade, lower barricade, bell housing are silicon steel and make; Case and pedestal are fixed, and case covers cylinder, bell housing, and case end face is with the through wires hole being communicated with internal cavities.
The preferred version of fixing upper barricade, lower barricade: the cylinder inner wall of described pedestal is with the madial wall muscle of many axial distribution, and the coboundary of cylinder is with top muscle; The outer rim of lower barricade has the gap coordinating with madial wall muscle, and lower barricade is stuck in the bottom of cylinder; Upper barricade is supported by madial wall muscle, and the outer rim of upper barricade has threading breach, and threading breach is corresponding with muscle position, top, and case end face inwall is with beading, and upper barricade is crushed between madial wall muscle and beading; The top muscle of cylinder snaps in a side of case through wires hole.
The preferred version of fixed mask cover: the outer wall of described pedestal cylinder is with the lateral wall muscle of many axial distribution, the inwall of described case is with the interior muscle of many axial distribution, the top of encloser inner wall is with limit rib, and bell housing is stuck between cylinder lateral wall muscle, the interior muscle of case, limit rib.
The upper end rounding of the lateral wall muscle of further optimizing; The interior muscle interlude of described case and bell housing laminating, one end of interlude is chamfering, gradient near one end band of case end face.
Vertical columns on the base plate of said base, the upper end of column is with square hole; The lateral wall of case is with mounting ear, mounting ear perforate, and mounting ear is relative with stud, by screw, case and pedestal is fixed.
The end face of above-mentioned case is with center pit.
The top edge of above-mentioned case, with projection, has cable hole on projection.
Said base, case are by integrally moulded.
Compared with prior art, the invention has the advantages that: 1, fixing upper barricade, lower barricade in the cylinder of pedestal, the outer fixed mask cover of cylinder, the upper barricade that silicon steel is made, lower barricade, bell housing surround a full space surrounding, can effectively prevent the interference of external magnetic field to the magnetic circuit component in space, play good shielding action, and do not affect the desired voltage withstand class of magnetic circuit component.2, barricade, bell housing etc. be by the inside and outside sidewall muscle on pedestal cylinder, and the interior muscle on case, beading, positioning bar etc. are spacing, fixing, Stability Analysis of Structures, guarantee shield effectiveness, and be easy to realize low cost of manufacture, compact conformation, has modular universal function.3, cable hole, through wires hole, center pit etc. are set on case, further strengthen its practicality, easier while installing and using.
Accompanying drawing explanation
Fig. 1 is one-piece construction schematic diagram of the present invention.
Fig. 2 is the structural representation of pedestal in the embodiment of the present invention.
Fig. 3 is the structural representation of case in the embodiment of the present invention.
Fig. 4 is the structural representation that the other direction of Fig. 3 is observed.
Fig. 5 is the STRUCTURE DECOMPOSITION schematic diagram of the embodiment of the present invention.
Fig. 6 is the installation process schematic diagram of the embodiment of the present invention.
Fig. 7 is the partial sectional view of the embodiment of the present invention.
In figure: 1, pedestal, 11, base plate, 12, mounting hole, 13, pillar, 14, lateral wall muscle, 15, top muscle, 16, cylinder, 17, madial wall muscle; 2, case, 20, housing, 21, mounting ear, 22, through wires hole, 23, cable hole, 24, interior muscle, 25, center pit, 26, beading, 27, limit rib; 3, bell housing; 4, lower barricade, 41, gap; 5, upper barricade, 51, threading breach.
Embodiment
Below in conjunction with accompanying drawing, embodiment, the present invention is further described.
Embodiment, magnet shielding structure part, for magnetic modulation voltage sensor, comprises pedestal 1, case 2 as shown in Figure 1, also comprises the lower barricade, bell housing, the upper barricade that are positioned at pedestal 1, case 2.
As shown in Figure 2, pedestal 1 comprises base plate 11, cylinder 16 etc. to the structure of pedestal 1.Base plate 11 is tabular, on base plate 11, with a plurality of mounting holes 12, can pedestal 1 be installed on external unit by base plate 11, mounting hole 12.On base plate 11, stationary cylinder 16, the upper end open of cylinder 16, and inside is cavity.Fixing a plurality of madial wall muscle 17 of axial distribution on the madial wall of cylinder 16, madial wall muscle 17 is array distribution at cylinder inner wall.Fixing a plurality of lateral wall muscle 14 of axial distribution on the outer wall of cylinder 16, the upper end rounding of lateral wall muscle 14, plays the effect of guiding during with other parts assembling, be convenient to install.The tip edge of cylinder 16 is fixed the top muscle 15 of two position symmetries, and top muscle 15 raises up.On the base plate 11 of cylinder 16 both sides, fix two pillars 13, the center, upper end of pillar 13 is with the square hole that use is installed.
As shown in Figure 3, Figure 4, case 2 comprises hood-shaped housing 20 to the structure of case 2, and the internal diameter of housing 20 is greater than the external diameter of the cylinder 16 of pedestal 1, and the lower openings of housing 20 has center pit 25 on end face, and end face outer rim, with projection, has a plurality of cable holes 23 on projection.The end face of housing 20 has two symmetrical through wires holes 22, by through wires hole 22, makes to be interlinked to the outside in housing 20.The both sides of the outer wall of housing 20 fixedly mount respectively ear 21, and the both sides of mounting ear 21 are with reinforcement, are with porosely on mounting ear 21, and two mounting ears 21 are corresponding with two columns 13 on pedestal 1, and the hole on mounting ear 21 is corresponding with the square hole on column 13.
As shown in Figure 4, many beadings 26 are fixed in the inner side of end face to the structure of housing 20 inside, and beading 26 is arc, and one section of inward flange along through wires hole 22 of beading 26 distributes.The interior muscle 24 of the fixing a plurality of axial distribution of madial wall of housing 20.Interior muscle 24 comprises three sections, and middle one section is and the contact segment of bell housing to assemble rear and bell housing laminating; One section near shell nozzle is transition chamfering, plays guide effect during assembling; One section near housing end face inwall is that when bell housing is assembled at the end, jam-packed bell housing, plays spacing effect with gradient extruded segment.On the inwall of housing 20, also fix a plurality of limit ribs 27, limit rib 27 is near housing end face.
Pedestal 1, case 2 are adopted made of plastic, integrated molding.
The structure of bell housing 3, lower barricade 4, upper barricade 5 as shown in Figure 5.
The tubular that bell housing 3 is both ends open, its internal diameter is greater than the external diameter of the cylinder 16 of pedestal 1, and its external diameter is less than the internal diameter of the housing 20 of case 2.
Lower barricade 4 is laminar, can put into the inner bottom part of the cylinder 16 of pedestal 1, the circumference of lower barricade 4 is with a plurality of gap 41, the position of gap 41 is corresponding with the madial wall muscle 17 in cylinder, when lower barricade 4 is put into cylinder 16, gap 41 coordinates with madial wall muscle 17, plays guiding, spacing effect.
Upper barricade 5 is laminar, can be placed in the cylinder 16 of pedestal 1, and the madial wall muscle 17 by cylinder 16 supports, the edge of upper barricade 5 has the threading breach 51 of two position symmetries, threading breach 51 is corresponding with top muscle 15 positions of cylinder 16 coboundarys, and after installing, threading breach 51 is relative with through wires hole 22 positions on case 2.
Bell housing 3, lower barricade 4, upper barricade 5 all adopt silicon steel to make, and Magnetic Shielding Effectiveness is good.
For easy to assembly, prevent from hurting electric wire etc., the edges and corners rounding of above-mentioned parts.
Installation, the positioning relation of above-mentioned magnet shielding structure part are as follows:
Lower barricade 4 is put into the cylinder 16 of pedestal 1, and the gap 41 of lower barricade 4 coordinates with madial wall muscle 17, plays the effect of guiding, location.
Bell housing 3 is enclosed within outside the cylinder 16 of pedestal 1 from top to bottom, and during installation, the fillet of the lateral wall muscle 14 of cylinder 16 plays the effect of guiding.
The magnetic circuit component of voltage sensor, electrical equipment etc. are put into the cavity of cylinder 16.
Upper barricade 5 is put into cylinder 16, and the lead-in wire of the magnetic circuit component in cylinder 16 cavitys is through the threading breach 51 of upper barricade 5, and upper barricade 5 is placed in the top of madial wall muscle 17, the top muscle 15 on the corresponding cylinder of threading breach 51 16 tops.
The through wires hole 22 of case 2 is aimed at the top muscle 15 of cylinder 16, the lead-in wire of magnetic circuit component etc. is through through wires hole 22, the housing 20 of case 2 is enclosed within outside bell housing 3, because the interior muscle 24 of housing 20 inwalls is with chamfering, contact segment, gradient, in moving down process, housing 20 plays guide effect, and clamp gradually bell housing 3, play the effect of location.
After being in place, the beading 26 in housing 20 compresses upper barricade 5, and pedestal cylinder 16 coboundarys are between beading 26 and housing 20.Limit rib 27 compresses bell housing 3, further spacing.Top muscle 15 snaps in a side of the through wires hole 22 of case 2, adopts self-tapping screw that the mounting ear of case 2 21 is connected with the pillar 13 of pedestal 1, and pedestal 1 is fixing with case 2.
After installation, can, by the reliability of the center pit 25 check assemblings on case 2, while also can be casting glue embedding between upper barricade 5 and center pit 25, provide space.
After assembling, by the mounting hole 12 on pedestal 1 by above-mentioned assembly parts install with external unit on, and external cable, data line can, along cable hole 23, be convenient to lay cabling.
Claims (8)
1. the magnet shielding structure part of magnetic modulation voltage sensor, is characterized in that: described magnet shielding structure part comprises pedestal, case, upper barricade, bell housing, lower barricade; Pedestal comprises base plate, the fixing cylinder of upper end open on base plate, and the fixing lower barricade in bottom in cylinder, the fixing upper barricade in top in cylinder, lower barricade, cylinder, upper barricade surround internal cavities; Cylinder is fixing suit bell housing outward; Upper barricade, lower barricade, bell housing are silicon steel and make; Case and pedestal are fixed, and case covers cylinder, bell housing, and case end face is with the through wires hole being communicated with internal cavities.
2. the magnet shielding structure part of magnetic modulation voltage sensor according to claim 1, is characterized in that: the cylinder inner wall of described pedestal is with the madial wall muscle of many axial distribution, and the coboundary of cylinder is with top muscle; The outer rim of lower barricade has the gap coordinating with madial wall muscle, and lower barricade is stuck in the bottom of cylinder; Upper barricade is supported by madial wall muscle, and the outer rim of upper barricade has threading breach, and threading breach is corresponding with muscle position, top, and case end face inwall is with beading, and upper barricade is crushed between madial wall muscle and beading; The top muscle of cylinder snaps in a side of case through wires hole.
3. the magnet shielding structure part of magnetic modulation voltage sensor according to claim 1 and 2, it is characterized in that: the outer wall of described pedestal cylinder is with the lateral wall muscle of many axial distribution, the inwall of described case is with the interior muscle of many axial distribution, the top of encloser inner wall is with limit rib, and bell housing is stuck between cylinder lateral wall muscle, the interior muscle of case, limit rib.
4. the magnet shielding structure part of magnetic modulation voltage sensor according to claim 3, is characterized in that: the upper end rounding of described lateral wall muscle; The interior muscle interlude of described case and bell housing laminating, one end of interlude is chamfering, gradient near one end band of case end face.
5. the magnet shielding structure part of magnetic modulation voltage sensor according to claim 1, is characterized in that: vertical columns on the base plate of described pedestal, and the upper end of column is with square hole; The lateral wall of case is with mounting ear, mounting ear perforate, and mounting ear is relative with stud, by screw, case and pedestal is fixed.
6. the magnet shielding structure part of magnetic modulation voltage sensor according to claim 1, is characterized in that: the end face of described case is with center pit.
7. the magnet shielding structure part of magnetic modulation voltage sensor according to claim 1, is characterized in that: the top edge of described case, with projection, has cable hole on projection.
8. the magnet shielding structure part of magnetic modulation voltage sensor according to claim 1, is characterized in that: described pedestal, case are by integrally moulded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410354355.0A CN104101746B (en) | 2014-07-23 | 2014-07-23 | The magnet shielding structure part of magnetic modulation voltage sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410354355.0A CN104101746B (en) | 2014-07-23 | 2014-07-23 | The magnet shielding structure part of magnetic modulation voltage sensor |
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| Publication Number | Publication Date |
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| CN104101746A true CN104101746A (en) | 2014-10-15 |
| CN104101746B CN104101746B (en) | 2016-09-14 |
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| CN201410354355.0A Active CN104101746B (en) | 2014-07-23 | 2014-07-23 | The magnet shielding structure part of magnetic modulation voltage sensor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105387877A (en) * | 2015-11-04 | 2016-03-09 | 东方通信股份有限公司 | Magnetic rotary encoder for paper currency detection system |
| CN105403231A (en) * | 2015-11-04 | 2016-03-16 | 东方通信股份有限公司 | Magnetic rotary encoder |
| CN108732403A (en) * | 2017-04-24 | 2018-11-02 | 航天科工深圳（集团）有限公司 | A kind of current sensor and its balance of flux circuit |
| CN108732404A (en) * | 2017-04-24 | 2018-11-02 | 航天科工深圳（集团）有限公司 | A kind of current sensor and its more balance of flux control circuits |
| CN111693756A (en) * | 2020-06-04 | 2020-09-22 | 物兴科技(深圳)有限公司 | Non-contact AC/DC digital sensor and current detection method using same |
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| CN103051988A (en) * | 2012-12-25 | 2013-04-17 | 苏州恒听电子有限公司 | Clamp type shielding shell and sounding unit with shielding shell |
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| US4760333A (en) * | 1984-12-13 | 1988-07-26 | Kanto Seiki Co., Ltd. | Crossed coil meter having concentrically wound magnetic shield |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105387877A (en) * | 2015-11-04 | 2016-03-09 | 东方通信股份有限公司 | Magnetic rotary encoder for paper currency detection system |
| CN105403231A (en) * | 2015-11-04 | 2016-03-16 | 东方通信股份有限公司 | Magnetic rotary encoder |
| CN105387877B (en) * | 2015-11-04 | 2017-08-18 | 东方通信股份有限公司 | Banknote sensing system magnetic rotary encoder |
| CN105403231B (en) * | 2015-11-04 | 2017-12-05 | 东方通信股份有限公司 | Magnetic rotary encoder |
| CN108732403A (en) * | 2017-04-24 | 2018-11-02 | 航天科工深圳（集团）有限公司 | A kind of current sensor and its balance of flux circuit |
| CN108732404A (en) * | 2017-04-24 | 2018-11-02 | 航天科工深圳（集团）有限公司 | A kind of current sensor and its more balance of flux control circuits |
| CN108732404B (en) * | 2017-04-24 | 2020-10-20 | 航天科工深圳（集团）有限公司 | Current sensor and multi-flux balance control circuit thereof |
| CN108732403B (en) * | 2017-04-24 | 2020-10-20 | 航天科工深圳（集团）有限公司 | Current sensor and magnetic flux balancing circuit thereof |
| CN111693756A (en) * | 2020-06-04 | 2020-09-22 | 物兴科技(深圳)有限公司 | Non-contact AC/DC digital sensor and current detection method using same |
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|---|---|
| CN104101746B (en) | 2016-09-14 |
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Address after: 315021 Zhejiang Province, Ningbo Jiangbei District Yongjiang Industrial Park No. 138 vibration Yonglu Applicant after: NINGBO CRRC TIMES SENSING TECHNOLOGY CO., LTD. Address before: 315021 Zhejiang Province, Ningbo Jiangbei District Yongjiang Industrial Park No. 138 vibration Yonglu Applicant before: Ningbo CSR Times Transducer Technique Co., Ltd. |
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