CN103151157A - Combined current transformer - Google Patents
Combined current transformer Download PDFInfo
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- CN103151157A CN103151157A CN 201310096121 CN201310096121A CN103151157A CN 103151157 A CN103151157 A CN 103151157A CN 201310096121 CN201310096121 CN 201310096121 CN 201310096121 A CN201310096121 A CN 201310096121A CN 103151157 A CN103151157 A CN 103151157A
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- injection molding
- injection moulding
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Abstract
The invention discloses a combined current transformer, comprising an annular iron core, a winding coil, a plastic package shell and an injection molding positioning sleeve, wherein the injection molding positioning sleeve consists of a base circle cable sleeve, conductive busbar slots and a positioning convex body, wherein two conductive busbar slots are symmetrically arranged in the inner hole wall of the base circle cable sleeve; the injection molding positioning sleeve is blocked on the centre hole inner side of the combining body of the annular iron core and the winding coil; the combing bodies of the annular iron core, the winding coil and the injection molding positioning sleeve are wrapped in the plastic package shell; and the inner hole of the injection molding positioning sleeve is a sensing ring centre hole. By additionally arranging the injection molding positioning sleeve, the combining member of the annular iron core and the winding coil can be accurately mounted in a die-casting mould, so that the accurate die-casting is realized, the defect that the coil is exposed due to the shifting of the plastic package shell is overcome, the influence of human factors on the quality of products is eliminated, the yield of the products is above 99.9%, the stability is good, the production efficiency is high, and the economic benefit is quite obvious.
Description
Technical field:
The present invention relates to a kind of current transformer, relate in particular to a kind of low-pressure injection molding current transformer.
Background technology:
Current/voltage is big and small in the circuit of power consumption differs greatly from several peaces to several Wan An, test for ease of the technical parameter to electrical network, measuring instrument used threshold currents used is small electric stream, therefore the large current conversion with electrical network is the electric current of appointment, otherwise just be difficult to monitoring, voltage on the high-voltage fence circuit is all higher in addition, and it is breakneck directly measuring.Current transformer is exactly large electric current to be become the electrical product of little electric current, and it can be transitioned into high-voltage fence detecting instrument and convert the power supply that can normally use to.The instrument major part that detects due to present electrical network is the current voltmeter of pointer-type, so the secondary current great majority of current transformer are the ampere levels.The major function of current transformer is that high voltage or large electric current scaling transformation are become standard low-voltage or normalized current, in order to realize standardization, the miniaturization of measuring instrument, protection equipment and automatic control equipment.Instrument transformer can also be used to separate high-voltage system simultaneously, to guarantee the safety of the person and equipment.
existing low-pressure injection molding current transformer, comprise annular core, winding coil, three plastic packaging positioning strips and plastic packaging housing, winding coil is wrapped on annular core, three plastic packaging positioning strips are arranged on the centre bore medial surface of winding coil and annular core combination equably, and be connected as a single entity with the plastic packaging housing, annular core and winding coil are coated in the plastic packaging housing, are formed for the conductive bus bar of tested electrical network or the instrument transformer core opening that wire passes, when injection moulding coats, be coated on equably on the annular core that is wound with winding coil in order to ensure the plastic packaging housing, prevent that the skew of plastic packaging housing from producing envelope partially, stop the coil open discontinuity, three plastic packaging positioning strips must be arranged on the centre bore medial surface of winding coil and annular core combination equably, yet in actual production process, this specification requirement to the operator is very high, human factor is quite large on the impact of product quality, a die casting qualification rate of product is not high, and poor stability, comprehensive die casting qualification rate is only 75%～80%, simultaneously, even a die casting is qualified, there is not eccentric defective in the plastic packaging housing, three plastic packaging positioning strips and plastic packaging housing still exist die casting overlap and difference of height in the junction, must carry out manual removal and reparation, otherwise not only affect the presentation quality of product, and affect the practical effect of product, the client can not accept.Yet remove the die casting overlap and carry out the reparation of filing convex body with file and both required great effort with the trimming cutter by hand, time-consuming again, production efficiency is low, and per tour output capacity is only 120 left and right, and production cost is high.This is the technical problem that is difficult to overcome in plastic sealed instrument transformer production, has both affected the stability of product quality, affects again production efficiency, is to cause the key technical problem that product percent of pass is low, production cost is high.In order to solve this technical barrier, the applicant has invented a kind of Combined type current transformer.
Summary of the invention:
The purpose of this invention is to provide a kind of Combined type current transformer, it can overcome the deficiencies in the prior art, and one time the die casting qualification rate is high.
The technical solution adopted in the present invention is:
a kind of Combined type current transformer, comprise annular core, winding coil and plastic packaging housing, winding coil is wrapped on annular core, annular core and winding coil are coated in the plastic packaging housing, it is characterized in that: also comprise the injection moulding locating sleeve, the hollow cylinder cylinder that described injection moulding locating sleeve is a upper and lower opening, it is by the basic circle cable sleeve, conductive bus bar slot and positioning convex body form, two conductive bus bar slots are arranged on basic circle cable sleeve inner hole wall symmetrically, the outside of conductive bus bar slot is positioning convex body, the injection moulding locating sleeve relies on the outer surface of two positioning convex bodies to be installed on the centre bore medial surface of annular core and winding coil combination, annular core, the combination of winding coil and injection moulding locating sleeve all is coated in the plastic packaging housing, the induction core opening that the endoporus of injection moulding locating sleeve passes for being used for tested electrical network conductive bus bar or wire.
owing to having set up prefabricated injection moulding locating sleeve in the present invention, when die casting plastic packaging housing, location mandril is inserted in the endoporus of injection moulding locating sleeve, sub-assembly with annular core and winding coil is sleeved on the injection moulding locating sleeve again, the outer surface of two positioning convex bodies on the injection moulding locating sleeve is coordinated with the centre bore medial surface of the sub-assembly of annular core and winding coil, so just can make the sub-assembly of annular core and winding coil accurately in being arranged on die casting, realize that accurate injection moulding forms the plastic packaging housing, stop the skew of plastic packaging housing and produce the winding coil open discontinuity, the injection moulding locating sleeve that this structure has been arranged, in actual plastic packaging production process as long as on the plug during the sub-assembly of annular core and winding coil is sleeved on die casting, matched moulds die casting gets final product, specification requirement to the operator is not high, eliminated the impact of human factor on product quality, a die casting qualification rate of product is up to more than 99.9%, and good stability.Because the plastic packaging housing is compressing in advance, precisely unify for the conductive bus bar of tested electrical network or the inductance loop heart hole dimension that wire passes, the endoporus of induction core opening is smooth smooth, improved the accuracy of manufacture and the presentation quality of product, the user highly approves, compared with prior art not only production efficiency is high, per tour output capacity can reach 360 left and right, and stable and reliable product quality, the product integrated cost descends 12%～15%, and economic benefit is very remarkable.Carry out the reparation of filing convex body because induction core opening after this Combined type current transformer die cast need not the operator with trimming cutter manual removal die casting overlap with file, so the operator produces free and relaxed.
Description of drawings:
Fig. 1 is structural representation of the present invention;
Fig. 2 is the A-A cutaway view of Fig. 1;
Fig. 3 is the structural representation of annular core and winding coil sub-assembly;
Fig. 4 is the left view of Fig. 3;
Fig. 5 is the structural representation of injection moulding locating sleeve;
Fig. 6 is the B-B cutaway view in Fig. 5;
In figure, the 1-annular core; The 2-winding coil; 3-plastic packaging housing; 4-injection moulding locating sleeve;
41-basic circle cable sleeve; 42-conductive bus bar slot; The 43-positioning convex body; 44-responds to core opening.
Embodiment:
Describe the specific embodiment of the present invention in detail below in conjunction with accompanying drawing;
a kind of Combined type current transformer, as Fig. 1～shown in Figure 6, comprise annular core 1, winding coil 2 and plastic packaging housing 3 and injection moulding locating sleeve 4, winding coil 2 is wrapped on annular core 1, described injection moulding locating sleeve 4 is the hollow cylinder cylinder of a upper and lower opening, it is by basic circle cable sleeve 41, conductive bus bar slot 42, positioning convex body 43 forms, two conductive bus bar slots 42 are arranged on basic circle cable sleeve 41 inner hole walls symmetrically, the outside of conductive bus bar slot 42 is positioning convex body 43, injection moulding locating sleeve 4 relies on the outer surface of two positioning convex bodies 43 to be installed on the centre bore medial surface of annular core 1 and winding coil 2 combinations, annular core 1, the combination of winding coil 2 and injection moulding locating sleeve 4 all is coated in plastic packaging housing 3, the induction core opening 44 that the endoporus of injection moulding locating sleeve 4 passes for being used for tested electrical network conductive bus bar or wire.
Claims (1)
1. Combined type current transformer, comprise annular core (1), winding coil (2) and plastic packaging housing (3), winding coil (2) is wrapped on annular core (1), annular core (1) and winding coil (2) are coated in plastic packaging housing (3), it is characterized in that: also comprise injection moulding locating sleeve (4), described injection moulding locating sleeve (4) is the hollow cylinder cylinder of a upper and lower opening, it is by basic circle cable sleeve (41), conductive bus bar slot (42), positioning convex body (43) forms, two conductive bus bar slots (42) are arranged on basic circle cable sleeve (41) inner hole wall symmetrically, the outside of conductive bus bar slot (42) is positioning convex body (43), injection moulding locating sleeve (4) relies on the outer surface of two positioning convex bodies (43) to be installed on the centre bore medial surface of annular core (1) and winding coil (2) combination, annular core (1), the combination of winding coil (2) and injection moulding locating sleeve (4) all is coated in plastic packaging housing (3), the induction core opening (44) that the endoporus of injection moulding locating sleeve (4) passes for being used for tested electrical network conductive bus bar or wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201310096121 CN103151157A (en) | 2013-03-22 | 2013-03-22 | Combined current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201310096121 CN103151157A (en) | 2013-03-22 | 2013-03-22 | Combined current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103151157A true CN103151157A (en) | 2013-06-12 |
Family
ID=48549155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201310096121 Pending CN103151157A (en) | 2013-03-22 | 2013-03-22 | Combined current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103151157A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106252026A (en) * | 2016-07-19 | 2016-12-21 | 东泽节能技术（苏州）有限公司 | A kind of bar-like member and the fastening installation method of endless member |
| CN112904069A (en) * | 2020-12-29 | 2021-06-04 | 宁波中科毕普拉斯新材料科技有限公司 | Injection-molded current transformer and preparation method thereof |
-
2013
- 2013-03-22 CN CN 201310096121 patent/CN103151157A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106252026A (en) * | 2016-07-19 | 2016-12-21 | 东泽节能技术（苏州）有限公司 | A kind of bar-like member and the fastening installation method of endless member |
| CN112904069A (en) * | 2020-12-29 | 2021-06-04 | 宁波中科毕普拉斯新材料科技有限公司 | Injection-molded current transformer and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130612 |