CN204537832U - Plug-in hollow coil current transformer - Google Patents
Plug-in hollow coil current transformer Download PDFInfo
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- CN204537832U CN204537832U CN201520035381.7U CN201520035381U CN204537832U CN 204537832 U CN204537832 U CN 204537832U CN 201520035381 U CN201520035381 U CN 201520035381U CN 204537832 U CN204537832 U CN 204537832U
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Abstract
Plug-in hollow coil current transformer, its housing comprises base and lid, also comprise air core coil assembly, housing and the sleeve for being installed in housing, described sleeve is fixedly connected with housing, described air core coil assembly comprises mutual inductor coil, be fixedly connected on the permanent joint of mutual inductor coil one end and be fixedly connected on the pluggable joint of the mutual inductor coil other end, described air core coil assembly coordinates with movable between housing and sleeve, the permanent joint of described air core coil assembly stretches into one end of housing, pluggable joint stretches into the other end of pluggable mode from housing, achieve a butt joint with the permanent joint being positioned at housing in housing.Instrument transformer adopts flexible Luo-coil, two ends are coordinated by sleeve, only one end that instrument transformer coordinates with sleeve activity need be pulled down during dismounting is directly enclosed within wire or busbar, without the need to dismantling circuit, has high accuracy, wide-range current, feature easy for installation.
Description
Technical field
The utility model relates to a kind of hollow coil current transformer, and the plug-in hollow coil current transformer of the pluggable installation coil particularly on a kind of motor protector, belongs to current transformer manufacturing technology field.
Background technology
Current transformer in the past, mostly adopt polyester enameled round copper wire coiling iron-core to form, the electric current linearity in measuring range is general, and sample rate current scope is relatively little.Current transformer can be divided into two types by the difference of secondary coil, and wherein a kind of with annular core, secondary coil is around on annular core; Another kind is not with annular core, and namely secondary coil is air core coil, and current transformer of the present utility model just belongs to this one.The great advantage of hollow coil current transformer is that the linearity is good, and hollow coil current transformer also has, and bandwidth range is large, overcurrent capability strong, without features such as second open circuit danger.But existing hollow coil current transformer limits due to product structure, because adopting rigid skeleton can not bend as required at use scene, can not be used for the current measurement of fortuitous conductor, field-checking, maintenance difficult.And, when fixing, loading and unloading the instrument transformer product of existing employing closed-loop structure air core coil, conductor or busbar need be pulled down, conductor just can be made to pass air core coil Ring current distribution, inconvenient terminal block.In addition, existing hollow coil current transformer mostly is single-phase, if for the current measurement of the three-phase electricity such as such as motor protector, need adopt multiple instrument transformer product, not only bring and use inconvenience, but also need improve use cost.
Summary of the invention
For above the deficiencies in the prior art, the purpose of this utility model is to provide a kind of sample rate current wide ranges, current measurement precision is high and the linearity good, plug-in hollow coil current transformer easy for installation.
For achieving the above object, the utility model adopts following technical scheme:
A kind of plug-in hollow coil current transformer, its housing comprises base 1 and lid 4, base 1 can be fixed together with lid 4 box-like body that formation one has inner chamber relatively, described instrument transformer comprises air core coil assembly 3, housing 5 and the sleeve 2 for being installed in housing 5, described sleeve 2 is fixedly connected with housing, described air core coil assembly 3 comprises mutual inductor coil 301, be fixedly connected on the permanent joint 302 of mutual inductor coil 301 one end and be fixedly connected on the pluggable joint 303 of mutual inductor coil 301 other end, described air core coil assembly 3 and described housing 5 and for be installed in housing 5 sleeve 2 between movablely to coordinate, the permanent joint 302 of described air core coil assembly 3 stretches into one end of housing 5, pluggable joint 303 stretches into the other end of pluggable mode from housing 5, achieve a butt joint with the permanent joint 302 being positioned at housing 5 in housing 5.
Further, be provided with the cavity for being fixedly installed in housing 5 in described sleeve 2, one end of sleeve 2 is fixedly connected with housing, and the other end is positioned at outside housing; Be positioned at sleeve 2 on the one end outside housing and be provided with and the buckle 203 that can coordinate with pluggable joint 303 activity of mutual inductor coil 301.
Further, the both sides of one end that described sleeve 2 housing connects are respectively equipped with can install with lid 4 upper groove 201 that coordinates and can install with base 1 low groove 202 coordinated, and described upper groove 201 and low groove 202 coordinate with the installation of base 1 with lid 4 respectively and realize being fixedly connected with of sleeve 2 and housing.
Further, the permanent joint 302 of described air core coil assembly 3 is provided with screw mounting hole 304, and described permanent joint 302 is fixedly installed on base 1 by the first screw 305; The one end being arranged on the housing 5 in the cavity of sleeve 2 is sleeved on the permanent joint 302 of air core coil assembly 3, and the other end of housing 5 accepts the insertion connection of the pluggable joint 303 of air core coil assembly 3; Described housing 5 by being fixedly connected with of sleeve 2 and housing, permanent joint 302 and housing be fixedly connected with to be connected with the buckle of sleeve 2 with pluggable joint 303 realize fixing.
Further, described housing 5 is for having the sleeve structure of external diameter, internal diameter and tube chamber, its external diameter coordinates with the cavity of described sleeve 2, to realize being fixedly connected with of housing 5 and sleeve 2, its internal diameter coordinates with the permanent joint 302 of air core coil assembly 3 and pluggable joint 303 respectively, docks with the plug type of permanent joint 302 to realize pluggable joint 303 in the tube chamber be made up of described internal diameter.
Further, described housing 5 is magnetic conduction type housing or conductivity type housing.
Further, described lid 4 is provided with screw hole 401, between described base 1 with lid 4, is fixedly connected into described housing by the second screw 402 with coordinating of screw hole 401.
Further, be provided with electronic circuit board 7 and electric sub-member plate 6 in described housing, described electronic circuit board 7 is fixed together with base 1 buckle, and described electric sub-member plate 6 is plugged on electronic circuit board 7.
Further, described electronic circuit board 7 is provided with socket 701, described socket 701 and described air core coil assembly 3 are welded on described electric sub-member plate 7 respectively.
Further, comprise the multiple single-phase hollow coil current transformer be made up of multiple air core coil assembly 3, multiple housing 5 and multiple sleeve 2, each single-phase hollow coil current transformer comprises an air core coil assembly 3, housing 5 and a sleeve 2, and multiple single-phase hollow coil current transformer is arranged on the described same housing be made up of base 1 and lid 4 respectively.
The Advantageous Effects that plug-in hollow coil current transformer of the present utility model has: be placed in sleeve by adopting housing, utilize sleeve, cooperation between housing realizes the structure of movable docking in the housing of mutual inductor coil two ends in sleeve, by adopting the plug-in fit structure of the pluggable joint of instrument transformer, not only easy for installation without the need to dismantling wire or busbar, and significantly can reduce the interference signal entered from coil two ends, the strength ratio of measuring-signal and interference signal can be improved simultaneously, thus obviously can expand the width of sample range and improve the precision of current measurement.In addition, by adopt sleeve and base, cover between with the structure of groove fit, permanent joint achieves the fixing of housing with being fixedly connected with of base with the buckle of pluggable joint and sleeve, not only installation effectiveness is high, and the requirement that can reduce greatly mould and die accuracy, effectively reduce costs raising rate of finished products.
Accompanying drawing explanation
Fig. 1 is the integrally-built schematic perspective view of the utility model plug-in hollow coil current transformer.
Fig. 2 is the schematic perspective view of the decomposition texture of the utility model plug-in hollow coil current transformer.
Embodiment
Below in conjunction with the embodiment that attached Fig. 1 and 2 provides, further illustrate the embodiment of plug-in hollow coil current transformer of the present utility model, can more clearly find out advantage of the present utility model and feature from the description of accompanying drawing illustrated embodiment.
As depicted in figs. 1 and 2, in the present embodiment, the concrete structure of plug-in hollow coil current transformer comprises base 1, for being installed in the sleeve 2 of housing 5, air core coil assembly 3, lid 4 and housing 5.The housing of instrument transformer is formed by base 1 and lid 4 cooperation, screw is adopted to be fixedly connected to form the box-like body with inner chamber between the two, the concrete structure be fixedly connected with as shown in Figure 2, lid 4 is provided with screw hole 401, is fixed on base 1 by lid 4 by the second screw 402 and screw hole 401.Described sleeve 2 is fixedly connected with housing, housing 5 is arranged in sleeve 2, and described air core coil assembly 3 comprises mutual inductor coil 301, be fixedly connected on the permanent joint 302 of mutual inductor coil 301 one end and be fixedly connected on the pluggable joint 303 of mutual inductor coil 301 other end.Permanent joint 302 and pluggable joint 303 are matched with mutual inductor coil 301 two ends, and coordinate with movable between sleeve 2, housing 5, the permanent joint 302 of described air core coil assembly 3 stretches into one end of housing 5, pluggable joint 303 stretches into the other end of pluggable mode from housing 5, achieves a butt joint in housing 5 with the permanent joint 302 being positioned at housing 5.Pluggable joint 303 docks with permanent joint 302 in housing 5 in pluggable mode, that is: pluggable joint 303 can insert in housing 5, and dock with permanent joint 302 in housing 5, with make the air core coil assembly 3 be made up of mutual inductor coil 301, permanent joint 302 and pluggable joint 303 formed as shown in Figure 1 close ring-type, certainly, pluggable joint 303 also can be extracted in housing 5, becomes free end to make that one end of the mutual inductor coil 301 with pluggable joint 303.Plug-in hollow coil current transformer of the present utility model is easy for installation, only pluggable joint 303 one end of instrument transformer need be pulled down and directly be enclosed within wire or busbar, without the need to dismantling circuit during dismounting; And, be placed in sleeve by adopting housing, the cooperation between sleeve, housing is utilized to realize the structure of movable docking in the housing of mutual inductor coil two ends in sleeve, significantly can reduce the interference signal entered from coil two ends, the strength ratio of measuring-signal and interference signal can be improved simultaneously, thus obviously can expand the width of sample range and improve the precision of current measurement.
Housing 5 in described sleeve 2 can be that hollow type is unshakable in one's determination.Adopt further preferably magnetic conduction type housing, namely housing 5 adopts high permeability material to make, and has the magnetic property as iron core, the hollow space that the permanent joint 302 of the mutual inductor coil 301 that its inside comprises described in permission passes.Described housing 5 also can adopt conductivity type housing, and namely housing 5 adopts good electric conducting material to make, and has good shielding properties.Obviously, the advantage of this docking of the present utility model and housing 5 structure is: greatly can reduce the gap between permanent joint 302 and pluggable joint 303, thus greatly can reduce the interference signal that enters from the two ends of mutual inductor coil 301; And when housing 5 adopts magnetic conduction type housing, housing 5 not only has to permanent joint 302 and pluggable joint 303 effect masking harmful interference signal, the ability of the useful measuring-signal of induction can also be strengthened to permanent joint 302 and pluggable joint 303, thus the interference signal that enters from the two ends of mutual inductor coil 301 can be reduced further, also can improve the strength ratio of measuring-signal and interference signal simultaneously.And when housing 5 adopts conductivity type housing, the function masking harmful interference signal of housing 5 pairs of permanent joints 302 and pluggable joint 303, also can reduce the interference signal entered from the two ends of mutual inductor coil 301 further.Should understand, reduce harmful interference signal and the strength ratio that can improve measuring-signal and interference signal, all effectively can improve the grade of the precision of the current measurement of hollow coil current transformer product and the width of sample range.
The mutual inductor coil 301 of described air core coil assembly 3 can adopt the air core coil (Luo-coil) of the flexible back bone of known structure, the concrete syndeton that permanent joint 302 is fixedly connected with mutual inductor coil 301 two ends respectively with pluggable joint 303 can have multiple implementation, as silica gel is adhesively fixed, namely clamp-on silica gel in permanent joint 302, pluggable joint 303 inside, then mutual inductor coil 301 two is enclosed within permanent joint 302, pluggable joint 303 internal fixtion respectively.The permanent joint 302 of described air core coil assembly 3 is fixedly connected with by syndeton with base 1.As shown in Figure 2, described syndeton is the screw mounting hole 304 be arranged on permanent joint 302 to a kind of preferred mode, and described permanent joint 302 is fixedly installed on base 1 by the first screw 305.Syndeton on certain permanent joint 302 also can have numerous embodiments, and syndeton is arranged on the termination, outside of permanent joint 302, and the termination, inner side that it does not affect permanent joint 302 is inserted into the installation in housing 5.Described lid 4 is provided with screw hole 401, between described base 1 with lid 4, is fixedly connected into described box-like body by the second screw 402 with coordinating of screw hole 401.
Be provided with the cavity for being fixedly installed in housing 5 in described sleeve 2, one end of sleeve 2 is fixedly connected with housing, and the other end is positioned at outside housing; Be positioned at sleeve 2 on the one end outside housing and be provided with and the buckle 203 that can coordinate with pluggable joint 303 activity of mutual inductor coil 301.The both sides of one end that described sleeve 2 is connected with housing are respectively arranged with for fixing upper groove 201 and low groove 202, the other end is provided with buckle 203, upper groove 201 coordinates with lid 4, and low groove 202 coordinates with base 1, and buckle 203 is clasped with the draw-in groove on pluggable joint 303.Buckle 203 coordinates to realize plugging joint 303 with plug joint 303 and is fixedly connected with the pluggable of sleeve 2, that is: when plugging joint 303 and inserting in the housing 5 in sleeve 2, buckle 203 by sleeve 2 fastens coordinates with plug joint 303, is fixed on that housing 5 in sleeve 2 is interior can not be deviate from by plugging joint 303; Triped by buckle 203 and plug joint 303, plug joint 303 can be made to extract smoothly in the housing 5 sleeve 2.Upper groove 201 and low groove 202 are installed with lid 4 and base 1 respectively and are coordinated, and coordinated by this installation and make: sleeve 2 is fixedly connected with housing, and the one end being fixedly housed in the housing 5 in cavity is sleeved on the permanent joint 302 of air core coil assembly 3, the other end of housing 5 can accept the insertion of the pluggable joint 303 of air core coil assembly 3.In other words, sleeve 2 is fixedly connected with described housing, and the housing 5 be fixedly mounted in the cavity of sleeve 2 is also fixed; Permanent joint 302 is fixedly connected with housing, and the termination, inner side of permanent joint 302 is inserted in housing 5 from one end of housing 5; The other end of housing 5 is unlimited, and the pluggable joint 303 for air core coil assembly 3 inserts, and pluggable joint 303 is connected with sleeve 2 buckle; In housing 5, the termination, inner side of the permanent joint 302 of air core coil assembly 3 is docked with the termination of pluggable joint 303.Housing 5 by being fixedly connected with of sleeve 2 and housing, permanent joint 302 and housing be fixedly connected with to be connected with the buckle of sleeve 2 with pluggable joint 303 realize fixing, not only installation effectiveness is high, and the requirement that can reduce greatly mould and die accuracy, effectively reduce costs raising rate of finished products.
Described housing 5 is for having the sleeve structure of external diameter, internal diameter and tube chamber.Described external diameter coordinates with the cavity of sleeve 2, and housing 5 can be made to be fixedly connected with sleeve 2 by this cooperation, concrete fit system adopts known any one, as secure fit.Described internal diameter must form the tube chamber of housing 5, internal diameter coordinates with the permanent joint 302 of mutual inductor coil 301 and pluggable joint 303 respectively, this cooperation makes pluggable joint 303 and permanent joint 302 being docked by plug type in the tube chamber that internal diameter is formed, that is: permanent joint 302 is by realizing in described intraluminal location with described minor diameter fit, pluggable joint 303 by with described minor diameter fit, realize the function inserted tube chamber and extract from tube chamber, also realize the location of docking with permanent joint 302 in tube chamber simultaneously.
Described plug-in hollow coil current transformer also comprises electric sub-member plate 6 in the housings that are fixed on and are made up of base 1 and lid 4 and electronic circuit board 7, and grafting between the two coordinates.Described electronic circuit board 7 is provided with socket 701, and socket 701, air core coil assembly 3 are welded on electric sub-member plate 7, and electronic circuit board 7 coordinates with the inner chamber of base 1.When being provided with electronic circuit board 7 and electric sub-member plate 6 at the same time, the fixed installation structure of electronic circuit board 7 and electric sub-member plate 6 preferably adopts mode as shown in Figure 2, described electronic circuit board 7 buckle is fixed on base 1, and electric sub-member plate 6 is plugged on electronic circuit board 7.
Owing to have employed the structure that pluggable joint 303 docks with permanent joint 302 in housing 5, so make the realization of heterogeneous plug-in hollow coil current transformer become possibility, that is: described air core coil assembly 3, housing 5 and sleeve 2 are respectively multiple (as depicted in figs. 1 and 2 3), one of them air core coil assembly 3, a housing 5 and a sleeve 2 form an independently single-phase hollow coil current transformer, and, the multiple single-phase hollow coil current transformer (3 single-phase hollow coil current transformers as depicted in figs. 1 and 2) formed thus is arranged on by base 1 respectively and covers on the 4 same housings formed.Should understand, why existing flexible Luo-coil current sensor is single-phase, one of its reason is, if single-phase Rogowski coil current sensor is directly combined into heterogeneous Rogowski coil current sensor, then because distance can not be very large between phase and phase, so a large amount of also very strong interference signals between phase and phase can enter Luo-coil from the two ends of the soft rod of insulating material, thus cause the significantly decline of the performance such as the width of sample range and the precision of current measurement, even likely make product therefore lose its practical value.
Above content is in conjunction with concrete preferred implementation further detailed description of the utility model, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, some simple deduction or replace can also be made, all should be considered as belonging to protection range of the present utility model.
Claims (10)
1. a plug-in hollow coil current transformer, its housing comprises base (1) and lid (4), base (1) can be fixed together with lid (4) housing that formation one has inner chamber relatively, it is characterized in that: described instrument transformer comprises air core coil assembly (3), housing (5) and the sleeve (2) for being installed in housing (5), described sleeve (2) is fixedly connected with housing, described air core coil assembly (3) comprises mutual inductor coil (301), be fixedly connected on the permanent joint (302) of mutual inductor coil (301) one end and be fixedly connected on the pluggable joint (303) of mutual inductor coil (301) other end, described air core coil assembly (3) and described housing (5) and for be installed in housing (5) sleeve (2) between movablely to coordinate, the permanent joint (302) of described air core coil assembly (3) stretches into one end of housing (5), pluggable joint (303) stretches into the other end of pluggable mode from housing (5), achieve a butt joint with the permanent joint (302) being positioned at housing (5) in housing (5).
2. plug-in hollow coil current transformer according to claim 1, it is characterized in that: in described sleeve (2), be provided with the cavity for being fixedly installed in housing (5), one end of sleeve (2) is fixedly connected with housing, and the other end is positioned at outside housing; Be positioned at sleeve (2) on the one end outside housing and be provided with and the buckle (203) that can coordinate with pluggable joint (303) activity of mutual inductor coil (301).
3. plug-in hollow coil current transformer according to claim 2, it is characterized in that: the both sides of one end that described sleeve (2) housing connects are respectively equipped with can install with lid (4) upper groove (201) that coordinates and can install with base (1) low groove (202) coordinated, described upper groove (201) and low groove (202) respectively with cover (4) and to coordinate with the installation of base (1) and realize being fixedly connected with of sleeve (2) and housing.
4. plug-in hollow coil current transformer according to claim 2, it is characterized in that: the permanent joint (302) of described air core coil assembly (3) is provided with screw mounting hole (304), described permanent joint (302) is fixedly installed on base (1) by the first screw (305); The one end being arranged on the housing (5) in the cavity of sleeve (2) is sleeved on the permanent joint (302) of air core coil assembly (3), and the other end of housing (5) accepts the insertion connection of the pluggable joint (303) of air core coil assembly (3); Described housing (5) by being fixedly connected with of sleeve (2) and housing, permanent joint (302) and housing be fixedly connected with to be connected with the buckle of sleeve (2) with pluggable joint (303) realize fixing.
5. plug-in hollow coil current transformer according to claim 1, it is characterized in that: described housing (5) is for having external diameter, the sleeve structure of internal diameter and tube chamber, its external diameter coordinates with the cavity of described sleeve (2), to realize being fixedly connected with of housing (5) and sleeve (2), its internal diameter coordinates with the permanent joint (302) of air core coil assembly (3) and pluggable joint (303) respectively, to realize pluggable joint (303) to dock with the plug type of permanent joint (302) in the tube chamber be made up of described internal diameter.
6. plug-in hollow coil current transformer according to claim 1, is characterized in that: described housing (5) is magnetic conduction type housing or conductivity type housing.
7. plug-in hollow coil current transformer according to claim 1, it is characterized in that: described lid (4) is provided with screw hole (401), between described base (1) with lid (4), be fixedly connected into described housing by the second screw (402) with coordinating of screw hole (401).
8. plug-in hollow coil current transformer according to claim 1, it is characterized in that: in described housing, be provided with electronic circuit board (7) and electric sub-member plate (6), described electronic circuit board (7) and base (1) buckle are fixed together, and described electric sub-member plate (6) is plugged on electronic circuit board (7).
9. plug-in hollow coil current transformer according to claim 8, it is characterized in that: described electronic circuit board (7) is provided with socket (701), described socket (701) and described air core coil assembly (3) are welded on described electric sub-member plate (7) respectively.
10. according to the arbitrary described plug-in hollow coil current transformer of claim 1-9, it is characterized in that: comprise the multiple single-phase hollow coil current transformer be made up of multiple air core coil assembly (3), multiple housing (5) and multiple sleeve (2), each single-phase hollow coil current transformer comprises an air core coil assembly (3), a housing (5) and a sleeve (2), and multiple single-phase hollow coil current transformer is arranged on by base (1) respectively with on lid (4) the same housing that forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520035381.7U CN204537832U (en) | 2015-01-19 | 2015-01-19 | Plug-in hollow coil current transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520035381.7U CN204537832U (en) | 2015-01-19 | 2015-01-19 | Plug-in hollow coil current transformer |
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| Publication Number | Publication Date |
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| CN204537832U true CN204537832U (en) | 2015-08-05 |
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| CN201520035381.7U Active CN204537832U (en) | 2015-01-19 | 2015-01-19 | Plug-in hollow coil current transformer |
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| CN (1) | CN204537832U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111323477A (en) * | 2020-03-16 | 2020-06-23 | 南京工业大学 | External penetration type eddy current detection probe structure for hydrogen storage cylinder |
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2015
- 2015-01-19 CN CN201520035381.7U patent/CN204537832U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111323477A (en) * | 2020-03-16 | 2020-06-23 | 南京工业大学 | External penetration type eddy current detection probe structure for hydrogen storage cylinder |
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