CN103456477B - Outdoor low voltage open-close type combination transformer - Google Patents
Outdoor low voltage open-close type combination transformer Download PDFInfo
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- CN103456477B CN103456477B CN201310383602.5A CN201310383602A CN103456477B CN 103456477 B CN103456477 B CN 103456477B CN 201310383602 A CN201310383602 A CN 201310383602A CN 103456477 B CN103456477 B CN 103456477B
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Abstract
The present invention relates to a kind of outdoor low voltage open-close type combination transformer.The object of this invention is to provide a kind of sealing, good weatherability and effective reliably high-performance outdoor low voltage open-close type combination transformer product.Technical scheme of the present invention: comprise the upper body and lower pour mass that are connected by holding screw, and both realizing, the sealing ring connected is sealed between upper and lower pour mass; Described upper body comprises semicircular top iron core, and the top loop epoxy layer this iron core being coated on inside, only being exposed at its two ends; Described lower pour mass comprises the semicircular-shaped lower portion iron core matched with top iron core, and the bottom epoxy resin layer this iron core being coated on inside, only being exposed at its two ends; Described bottom iron core is wound with secondary winding; Face on the epoxy resin layer of described bottom, just to upper body is processed with two ring annular grooves, and two circle grooves lay respectively at the outer ring at iron core both ends, bottom, described sealing ring is positioned in groove.
Description
Technical field
The present invention relates to a kind of instrument transformer, particularly a kind of outdoor low voltage open-close type combination transformer, is applicable to power transformer secondary side leading-out terminal.
Background technology
At present along with instrument transformer is widely used in city net, upgrading of rural power grids project, user on easy for installation, bus need not be torn open, also hot line job, the open-close type instrument transformer that can not affect user's normal electricity consumption can have tight demand, can be user's transformation project and save human and material resources, financial resources, improve transformation efficiency, save cost.The combination transformer that current transformer, voltage transformer are grouped together is widely used equally in engineering construction, but open-close type combination transformer (transducer) product is in the market also considerably less, also the advantage of the two effectively could not be concentrated on one even if having.The such as patent No. is that the Chinese invention patent of 201110237882.X discloses a kind of open-close type current voltage transformer, and its voltage sampling adopts profile of tooth spine, although can obtain current and voltage signals simultaneously, there are the following problems:
1, this invention is square structure, band shell, and properties of product are poor;
2, insulation property are poor, poor sealing, and weatherability etc. do not reach outdoor service index, and the ability of antiultraviolet is poor;
3, small product size is comparatively large, and voltage segment complex structure is huge, complex process, and cost is higher;
4, profile of tooth spine power taking inconvenience is dangerous again, does not reach effectively reliable, less stable, and large to the damage area of cable.
To sum up reason, so this product applicability is not strong, also seldom sees this product linked network in the market and uses.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of sealing, good weatherability and effective reliably high-performance outdoor low voltage open-close type combination transformer product for above-mentioned Problems existing and user's request, to prevent the corrosion to the inside and outside portion of instrument transformer of outdoor adverse circumstances, reduce the infringement that ultraviolet brings, increase the service life, improve the performances such as Product Precision grade simultaneously, increase validity, stability and reliability, and it is very convenient, reliable to install wiring.
The technical solution adopted in the present invention is: outdoor low voltage open-close type combination transformer, is characterized in that: it comprises the upper body and lower pour mass that are connected by holding screw, and both realizing, seals the sealing ring connected between upper and lower pour mass;
Described upper body comprises semicircular top iron core, and the top loop epoxy layer this iron core being coated on inside, only being exposed at its two ends;
Described lower pour mass comprises the semicircular-shaped lower portion iron core matched with top iron core, and the bottom epoxy resin layer this iron core being coated on inside, only being exposed at its two ends; Described bottom iron core is wound with secondary winding; Face on the epoxy resin layer of described bottom, just to upper body is processed with two ring annular grooves, and two circle grooves lay respectively at the outer ring at iron core both ends, bottom, described sealing ring is positioned in groove;
Described top loop epoxy layer is connected by described holding screw with bottom epoxy resin layer, and top iron core is corresponding with bottom iron core is spliced into complete annular core;
Described bottom epoxy resin layer is provided with conductive insert, this conductive insert offers screwed hole, this hole internal thread is connected with for puncturing cable insulation wrapper to obtain the special power taking screw of voltage signal, conductive insert is connected with voltage sampling wire near epoxy resin layer side, bottom, and this voltage sampling wire causes instrument transformer outside by private cable.
The two ends that described top iron core exposes exceed top loop epoxy layer plane 3mm, and the two ends that bottom iron core exposes are inwardly recessed 2.5mm relative to bottom epoxy resin layer plane, and reasonable clearance coordinates, and not only ensure its sealing but also ensure that effective contact of iron core coordinates.
Described upper body and lower pour mass are semicircle, and both are spliced into annular by described holding screw.
Described bottom epoxy resin layer is provided with the installation folder of circular arc by screw, its opening is relative with the opening of lower pour mass.
Described bottom epoxy resin layer is provided with lead end, and described voltage sampling wire free ends is drawn by this lead end; Described secondary winding is connected with current sampling wire, this wire free ends is drawn by lead end and is realized current sampling.
Described power taking screw is along instrument transformer radial arrangement.
Described power taking screw does not contact cable one end cover insulating case.
Described recess width is 5mm, and the degree of depth is 3mm.
The invention has the beneficial effects as follows: 1, iron core is all coated with epoxy resin compound adhesive outward and forms upper and lower pour mass up and down, and arrange sealing ring between pour mass up and down, viton seal ring is adopted to add spacing sealing means, ensure that the sealing of instrument transformer from structure, effectively can prevent the corrosion caused from outdoor adverse circumstances; Simultaneously because epoxy resin has excellent weatherability, effectively can reduce the destruction that ultraviolet brings, thus extend the useful life of instrument transformer.2, the two ends that top iron core exposes exceed top loop epoxy layer plane 3mm, the two ends that bottom iron core exposes are inwardly recessed 2.5mm relative to bottom epoxy resin layer plane, match with iron core projection in upper body, coincideing of upper and lower pour mass is ensured during installation, prevent dislocation, not only facilitate the installation of product, and effectively can ensure that magnetic circuit is closed good.3, lower pour mass is provided with the conductive insert of screwed hole, this hole internal thread is connected with power taking screw, conductive insert is drawn from lead end by voltage sampling wire near lower pour mass side simultaneously, extracts voltage signal, during actual use, utilize the self tapping of power taking screw to puncture cable insulation wrapper and obtain voltage signal, and by inserts, voltage sampling wire and lead end draw, relative to prior art, its structure and processing technology simpler, volume is less, and cost is lower; In addition, power taking screw is adopted to puncture insulated hull power taking, not only more safe and reliable, and also also less to the destruction of cable.4, bottom epoxy resin layer is provided with the installation folder of circular arc by screw, can be convenient be installed on the cable of step down side by this instrument transformer.5, adopt the form of monolateral winding, namely only secondary winding is set on the iron core of bottom, further simplify structure, reduce cost.6, structural entity of the present invention is rounded, and square structure compared to prior art, properties of product are better.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the structure chart of upper body in the present invention.
Fig. 3 is the upward view of Fig. 2.
Fig. 4 is the vertical view of Fig. 2.
Fig. 5 is the structure chart of lower pour mass in the present invention.
Fig. 6 is the upward view of Fig. 5.
Fig. 7 is the vertical view of Fig. 5.
Embodiment
The present invention, by advantage easy to loading and unloading for open-close type instrument transformer and the complete advantage perfect adaptation of combined instrument transformer monitoring information, is mainly used in Circuit Fault on Secondary Transformer leading-out terminal, the running status of Real-Time Monitoring transformer, guarantees that transformer normally works; The functions such as load management, electric energy quality monitoring, overcurrent management and control are completed to user simultaneously; Be equipped with relevant electric energy measuring equipment and can also complete electric energy metrical function, measure the overall electric energy use amount within this transformer range of management, facilitate power office to the calculating of utilization rate of electrical.
As shown in Figure 1, the present embodiment comprises upper body 1, lower pour mass 2, and both realizing, seals the sealing ring 3 connected between upper and lower pour mass 1,2; Wherein upper and lower pour mass 1,2 is semicircle (pour mass surface should smooth, bright and clean bubble-free and other defect), and both bilateral places of opening cylindrical all offer one group of screw hole, and by holding screw, both is reliably connected to form cirque structure; In practical application, by the centre bore of the cable 8 of step down side through this cirque structure, thus the present embodiment instrument transformer is installed on cable 8.
As shown in figs 2-4, described upper body 1 comprises semicircular top iron core 1-1, and the top loop epoxy layer 1-2 this iron core being coated on inside, only being exposed at its two ends; Described top iron core 1-1 adopts high performance silicon steel disc to make, and otch adopts special process grinding process; Top loop epoxy layer 1-2 adopts integrated poured forming, and sealing and insulating properties are effectively guaranteed.
As shown in Figure 5-Figure 7, described lower pour mass 2 comprises the semicircular-shaped lower portion iron core 2-1 matched with top iron core 1-1, and the bottom epoxy resin layer 2-2 this iron core being coated on inside, only being exposed at its two ends; Described bottom iron core 2-1 is wound with secondary winding; Described bottom iron core 2-1 adopts high performance silicon steel disc to make, and otch adopts special process grinding process; Bottom epoxy resin layer 2-2 adopts integrated poured forming, and sealing and insulating properties are effectively guaranteed.As shown in Figure 6, plane on described bottom epoxy resin layer 2-2, just to upper body 1 is processed with two ring annular groove 2-3(groove width 5mm, dark 3mm), and two circle groove 2-3 lay respectively at the outer ring at iron core 2-1 both ends, bottom, namely the outer ring of bottom epoxy resin layer 2-2 two perforates (position corresponding to bottom iron core exposes) is laid respectively at, described sealing ring 3(the present embodiment adopts viton seal ring) be positioned in groove 2-3, realize sealing ring and add position limiting sealed, ensure that the sealing of instrument transformer is effectively reliable.
Described top loop epoxy layer 1-2 is connected by described holding screw with bottom epoxy resin layer 2-2, and form cirque structure, top iron core 1-1 is corresponding with bottom iron core 1-2 is spliced into complete annular core, thus forms complete current transformer.
Described bottom epoxy resin layer 2-2 is respectively arranged with casting in bronze conductive insert 4 and lead end 7, wherein conductive insert 4 offers screwed hole, this hole internal thread is connected with self tapping power taking screw 5, conductive insert 4 is connected with voltage sampling wire near epoxy resin layer 2-2 side, bottom, and this voltage sampling wire free ends is drawn by lead end 7; In practical application, rotating power taking screw 5 and make it puncture cable 8(to arrange through instrument transformer centre bore) insulated hull is inserted in cable and obtains voltage signal, and drawn by power taking screw 5, conductive insert 4, voltage sampling wire and lead end 7 successively.Current sample adopts opens straight-through current transformer principle, and described secondary winding connects current sampling wire, and this wire free ends is drawn by lead end 7 and realized current sampling.
The two ends that described top iron core 1-1 exposes exceed top loop epoxy layer 1-2 plane 3mm, the two ends that bottom iron core 2-1 exposes are inwardly recessed 2.5mm relative to bottom epoxy resin layer 2-2 plane, match with iron core projection in upper body 1, on during to ensure to install, lower pour mass 1, 2 coincide, prevent dislocation, not only facilitate the installation of product, and effectively can ensure that magnetic circuit is closed good, in addition, in embedding bottom, the two ends epoxy resin layer 2-2 that installation upper back iron core 1-1 exposes, both realize sealing contact, thus further increase sealing and the weatherability of instrument transformer.
Described bottom epoxy resin layer 2-2 is provided with the installation folder 6 of circular arc by screw, its opening is relative with the opening of lower pour mass 2, so that be installed on by this instrument transformer on the cable 8 of step down side.
Described power taking screw 5, along the radial arrangement of annular instrument transformer, to adapt to the cable of different-diameter, improves the adaptability that instrument transformer uses.
Described power taking screw 5 does not contact cable 8 one end cover insulating case, guarantee the insulating properties of product, described insulating case is Collapsible structure, and its one end is enclosed within power taking screw 5 end (away from cable one end), the other end withstands conductive insert 4 all the time, thus realizes anti-stealing electricity function.
Described lead end adopts special secondary outgoing line joint, there is outdoor water-tight cable linkage function, entirety is made up of male butt joint and female butt joint two parts, there are three contact pins public butt joint inside, and one end of three contact pins is connected with a voltage signal line with two current signal lines respectively, the ledge of contact pin side design wrong insertion-proof slot, the outer surface cover of public butt joint has nut, this nut can freely rotate, and can be interior freely movable among a small circle along axis, but cannot take off from public butt joint, there is socket female butt joint inside, with contact pin position one_to_one corresponding, so that the transmission of signal, another terminated wires of socket, success extraction voltage and current signal, socket side arranges the groove part of wrong insertion-proof slot, corresponding with the ledge position of the inner wrong insertion-proof slot of public butt joint, realize anti-misplug function, the outer surface cover of female butt joint has screw, same, this screw also can freely rotate, and can be interior freely movable among a small circle along axis, but cannot take off from female butt joint, match with the nut outside public butt joint during connection and be threaded, achieve a butt joint locking function, have easy to connect, safe and reliable advantage.
Claims (8)
1. an outdoor low voltage open-close type combination transformer, it is characterized in that: it comprises the upper body (1) and lower pour mass (2) that are connected by holding screw, and be positioned between upper and lower pour mass (1,2) with realize both seal the sealing ring (3) connected;
Described upper body (1) comprises semicircular top iron core (1-1), and the top loop epoxy layer (1-2) this iron core being coated on inside, only being exposed at its two ends;
Described lower pour mass (2) comprises the semicircular-shaped lower portion iron core (2-1) matched with top iron core (1-1), and the bottom epoxy resin layer (2-2) this iron core being coated on inside, only being exposed at its two ends; Described bottom iron core (2-1) is wound with secondary winding; Face above, just to upper body (1) is processed with two ring annular grooves (2-3) in described bottom epoxy resin layer (2-2), and two circles groove (2-3) lay respectively at the outer ring at bottom iron core (2-1) both ends, described sealing ring (3) is positioned in groove (2-3);
Described top loop epoxy layer (1-2) is connected by described holding screw with bottom epoxy resin layer (2-2), and top iron core (1-1) is corresponding with bottom iron core (2-1) is spliced into complete annular core;
Described bottom epoxy resin layer (2-2) is provided with conductive insert (4), (4) offer screwed hole to this conductive insert, this hole internal thread is connected with for puncturing cable insulation wrapper to obtain the power taking screw (5) of voltage signal, conductive insert (4) is connected with voltage sampling wire near epoxy resin layer (2-2) side, bottom, and this voltage sampling wire free ends causes instrument transformer outside;
The two ends that described top iron core (1-1) is exposed exceed top loop epoxy layer (1-2) plane 3mm, and the two ends that bottom iron core (2-1) exposes are inwardly recessed 2.5mm relative to bottom epoxy resin layer (2-2) plane.
2. outdoor low voltage open-close type combination transformer according to claim 1, is characterized in that: described upper body (1) and lower pour mass (2) are semicircle, and both are spliced into annular by described holding screw.
3. outdoor low voltage open-close type combination transformer according to claim 1 and 2, is characterized in that: the installation folder (6) described bottom epoxy resin layer (2-2) being provided with circular arc by screw, and its opening is relative with the opening of lower pour mass (2).
4. outdoor low voltage open-close type combination transformer according to claim 1 and 2, it is characterized in that: described bottom epoxy resin layer (2-2) is provided with lead end (7), described voltage sampling wire free ends is drawn by this lead end; Described secondary winding is connected with current sampling wire, this wire free ends is drawn by lead end (7) and is realized current sampling.
5. outdoor low voltage open-close type combination transformer according to claim 1 and 2, is characterized in that: described top iron core (1-1) is identical with bottom iron core (2-1) structure, and both are around in the secondary winding composition on this iron core by iron core and monolateral coiling.
6. outdoor low voltage open-close type combination transformer according to claim 1 and 2, is characterized in that: described power taking screw (5) is along instrument transformer radial arrangement.
7. outdoor low voltage open-close type combination transformer according to claim 1 and 2, is characterized in that: described power taking screw (5) does not contact cable one end cover insulating case.
8. outdoor low voltage open-close type combination transformer according to claim 1 and 2, it is characterized in that: described groove (2-3) width is 5mm, the degree of depth is 3mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310383602.5A CN103456477B (en) | 2013-08-29 | 2013-08-29 | Outdoor low voltage open-close type combination transformer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310383602.5A CN103456477B (en) | 2013-08-29 | 2013-08-29 | Outdoor low voltage open-close type combination transformer |
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| CN103456477A CN103456477A (en) | 2013-12-18 |
| CN103456477B true CN103456477B (en) | 2016-04-13 |
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| CN103954817B (en) * | 2014-05-21 | 2016-05-04 | 国家电网公司 | The one sampler of opposing electricity-stealing |
| CN103996508B (en) * | 2014-05-26 | 2016-04-13 | 国家电网公司 | A kind of instrument transformer with water proof type shell |
| CN104407192B (en) * | 2014-11-26 | 2017-11-03 | 国家电网公司 | It is a kind of for power transmission line lightning shielding flow measurement can open type Rogowski coil |
| CN105572440A (en) * | 2015-10-20 | 2016-05-11 | 浙江华采科技有限公司 | Electric energy metering device capable of being installed on cable |
| CN105223393A (en) * | 2015-10-20 | 2016-01-06 | 浙江华采科技有限公司 | A kind of can the low-voltage circuit electric power meter of charged installation |
| CN105609299A (en) * | 2016-03-11 | 2016-05-25 | 吴世植 | Waterproof detachable current transformer |
| CN108828287A (en) * | 2018-04-08 | 2018-11-16 | 江阴市星火电子科技有限公司 | It is a kind of for measure traverse line electric current, voltage, temperature open-close type mutual inductor |
| CN108896798A (en) * | 2018-07-09 | 2018-11-27 | 国网山东省电力公司莱芜供电公司 | A kind of electric energy metering device |
| CN111354557A (en) * | 2020-04-07 | 2020-06-30 | 国网上海市电力公司 | Outdoor integrated low-voltage electric quantity acquisition device |
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| CN201829340U (en) * | 2010-10-14 | 2011-05-11 | 珠海威瀚科技发展有限公司 | Electric assembled mutual inductor |
| CN203433986U (en) * | 2013-08-29 | 2014-02-12 | 宁波恒力达科技有限公司 | Outdoor low-voltage open-close type combined mutual inductor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CA2832898A1 (en) * | 2011-04-14 | 2012-10-18 | Abb Technology Ag | Electrostatic shield for a transformer |
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| CN201004358Y (en) * | 2006-12-11 | 2008-01-09 | 苏保东 | A bus array current mutual inductor |
| CN102044334A (en) * | 2009-10-21 | 2011-05-04 | 江苏省电力公司南京供电公司 | Low-voltage transformer |
| CN201829340U (en) * | 2010-10-14 | 2011-05-11 | 珠海威瀚科技发展有限公司 | Electric assembled mutual inductor |
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