CN203433986U - Outdoor low-voltage open-close type combined mutual inductor - Google Patents
Outdoor low-voltage open-close type combined mutual inductor Download PDFInfo
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- CN203433986U CN203433986U CN201320531828.0U CN201320531828U CN203433986U CN 203433986 U CN203433986 U CN 203433986U CN 201320531828 U CN201320531828 U CN 201320531828U CN 203433986 U CN203433986 U CN 203433986U
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Abstract
The utility model relates to an outdoor low-voltage open-close type combined mutual inductor, and aims to provide a high-performance outdoor low-voltage open-close type combined mutual inductor which is good in sealing property and weather resistance, effective and reliable. According to the technical scheme, the outdoor low-voltage open-close type combined mutual inductor comprises an upper pouring body, a lower pouring body and seal rings, wherein the upper pouring body and the lower pouring body are connected through fastening screws, and the seal rings are located between the upper pouring body and the lower pouring body so as to make the upper pouring body and the lower pouring body be connected in a sealed mode; the upper pouring body comprises a semicircular upper iron core and an upper epoxy resin layer, wherein the upper iron core is wrapped by the upper epoxy resin layer with only the two ends of the upper iron core exposed; the lower pouring body comprises a semicircular lower iron core and a lower epoxy resin layer, wherein the semicircular lower iron core is matched with the upper iron core, and the lower iron core is wrapped by the lower epoxy resin layer with only the two ends of the lower iron core exposed; a secondary winding is wound around the lower iron core; the face, directly facing the upper pouring body, of the lower epoxy resin layer is provided with two annular grooves, the two grooves are located in outer rings on the two end portions of the lower iron core, and the seal rings are arranged in the grooves.
Description
Technical field
The utility model relates to a kind of instrument transformer, and 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, need not tear open bus, also can hot line job, the open-close type instrument transformer that can not affect the normal electricity consumption of user has 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 used in a large number equally in engineering construction, but open-close type combination transformer (transducer) product is in the market also considerably less, even if having also, the advantage of the two effectively could not be concentrated on to one.The Chinese utility model patent that for example patent No. is 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 utility model is square structure, band shell, and properties of product are poor;
2, insulation property are poor, poor sealing, and weatherabilities etc. do not reach outdoor service index, and the ability of antiultraviolet is poor;
3, small product size is larger, and voltage segment complex structure is huge, complex process, and cost is higher;
4, profile of tooth spine power taking inconvenience is dangerous again, do not reach effectively reliably, and less stable, and large to the damage area of cable.
To sum up reason, so this product applicability is not strong, also seldom sees in the market this product linked network and uses.
Utility model content
The technical problems to be solved in the utility model is: problem and user's request for above-mentioned existence provide a kind of sealing, good weatherability and effectively reliable high-performance outdoor low voltage open-close type combination transformer product, to prevent the corrosion to the inside and outside portion of instrument transformer of outdoor adverse circumstances, reduce the infringement that ultraviolet ray brings, increase the service life, improve the performances such as Product Precision grade simultaneously, increase validity, stability and reliability, and installation wiring is very convenient, reliable.
The technical scheme that the utility model adopts is: outdoor low voltage open-close type combination transformer, it is characterized in that: it comprises upper body and the lower pour mass connecting by holding screw, and the sealing ring joining to realize both sealings between upper and lower pour mass;
Described upper body comprises semicircular top iron core, and the top loop epoxy layer that this iron core is coated on to inside, only its two ends is exposed;
Described lower pour mass comprises the semicircular-shaped lower portion iron core matching with top iron core, and the bottom epoxy resin layer that this iron core is coated on to inside, only its two ends is exposed; On the iron core of described bottom, be wound with secondary winding; On the epoxy resin layer of described bottom, be processed with two ring annular grooves on the face of upper body, and two circle grooves lay respectively at the outer ring at iron core both ends, bottom, and 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;
On the epoxy resin layer of described bottom, be provided with conductive insert, on this conductive insert, offer screwed hole, this hole internal thread is connected with for puncturing cable insulation skin to obtain the special power taking screw of voltage signal, conductive insert is connected with voltage sampling wire near bottom epoxy resin layer one side, 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 concave into 2.5mm with respect to bottom epoxy resin layer plane, and reasonable clearance coordinates, and not only guarantee its sealing but also guarantee 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.
The installation folder of circular arc is installed by screw on the epoxy resin layer of described bottom, and 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 end is drawn by this lead end; In described secondary winding, be connected with current sampling wire, this wire free end is drawn and is realized current sampling by lead end.
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 beneficial effects of the utility model are: 1, upper and lower iron core is all coated with epoxy resin compound adhesive outward and forms upper and lower pour mass, and arrange sealing ring between upper and lower pour mass, adopt viton seal ring to add spacing sealing means, from structure, guaranteed the sealing of instrument transformer can effectively prevent the corrosion causing from outdoor adverse circumstances; Because epoxy resin has good weatherability, can effectively reduce the destruction that ultraviolet ray brings, thereby extend the useful life of instrument transformer simultaneously.2, the two ends that top iron core exposes exceed top loop epoxy layer plane 3mm, the two ends that bottom iron core exposes concave into 2.5mm with respect to bottom epoxy resin layer plane, match with iron core projection in upper body, during installation, guarantee coincideing of upper and lower pour mass, prevent dislocation, not only facilitated the installation of product, and can effectively guarantee that magnetic circuit is closed good.3, on lower pour mass, be 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 one side simultaneously, extracts voltage signal, during actual use, utilize the self tapping of power taking screw to puncture cable insulation skin and obtain voltage signal, and draw by inserts, voltage sampling wire and lead end, with respect to prior art, its structure and processing technology are simpler, volume is less, and cost is lower; In addition, adopt power taking screw to puncture insulated hull power taking, not only more safe and reliable, and also also less to the destruction of cable.4, the installation folder of circular arc is installed by screw on the epoxy resin layer of bottom, can be convenient this instrument transformer is installed on the cable of step down side.5, adopt the form of monolateral winding, only on the iron core of bottom, secondary winding is set, further simplify the structure, reduced cost.6, the utility model structural entity is rounded, square structure compared to prior art, and properties of product are better.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structure chart of upper body in the utility model.
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 utility model.
Fig. 6 is the upward view of Fig. 5.
Fig. 7 is the vertical view of Fig. 5.
Embodiment
The utility model, by advantage and the complete advantage perfect adaptation of combined instrument transformer monitoring information easy to loading and unloading of open-close type instrument transformer, is mainly used in Circuit Fault on Secondary Transformer leading-out terminal, and the running status of Real-Time Monitoring transformer is guaranteed transformer normal operation; User is completed the functions such as load management, electric energy quality monitoring, overcurrent management and control simultaneously; Be equipped with relevant electric energy measuring equipment and can also complete electric energy metrical function, measure the whole electric energy use amount within this transformer management scope, facilitate the calculating of power office to utilization rate of electrical.
As shown in Figure 1, the present embodiment comprises upper body 1, lower pour mass 2, and the sealing ring 3 joining to realize both sealings between upper and lower pour mass 1,2; Wherein upper and lower pour mass 1,2 is semicircle (pour mass surface should be smooth, bright and clean without bubble 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 to cirque structure; In practical application, the centre bore by the cable of step down side 8 through this cirque structure, thus the present embodiment instrument transformer is installed on cable 8.
As shown in Fig. 2-Fig. 4, described upper body 1 comprises semicircular top iron core 1-1, and the top loop epoxy layer 1-2 that this iron core is coated on to inside, only its two ends is exposed; 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 matching with top iron core 1-1, and the bottom epoxy resin layer 2-2 that this iron core is coated on to inside, only its two ends is exposed; On described bottom iron core 2-1, be 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, described bottom epoxy resin layer 2-2 goes up, in the plane of 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, lay respectively at the outer ring of two perforates of bottom epoxy resin layer 2-2 (position of exposing corresponding to bottom iron core), 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, guarantee 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, forms cirque structure, and top iron core 1-1 is spliced into complete annular core with bottom iron core 1-2 is corresponding, thereby forms complete current transformer.
On described bottom epoxy resin layer 2-2, be respectively arranged with casting in bronze conductive insert 4 and lead end 7, wherein on conductive insert 4, offer 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 bottom epoxy resin layer 2-2 mono-side, and this voltage sampling wire free end is drawn by lead end 7; In practical application, rotation power taking screw 5 makes it puncture cable 8(to arrange through instrument transformer centre bore) insulated hull is inserted into and in cable, obtains voltage signal, and by power taking screw 5, conductive insert 4, voltage sampling wire and lead end 7, draw successively.Current sample adopts opens straight-through current transformer principle, connects current sampling wire in described secondary winding, and this wire free end is drawn and realized current sampling by lead end 7.
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 with respect to the inside recessed 2.5mm of bottom epoxy resin layer 2-2 plane, match with the interior iron core projection of upper body 1, on while installing with assurance, lower pour mass 1, 2 coincide, prevent dislocation, not only facilitated the installation of product, and can effectively guarantee 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, thereby sealing and the weatherability of instrument transformer have further been improved.
The upper installation folder 6 that circular arc is installed by screw of described bottom epoxy resin layer 2-2, its opening is relative with the opening of lower pour mass 2, so that this instrument transformer is installed 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 covers 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 ends (away from cable one end), the other end withstands conductive insert 4 all the time, thereby realizes anti-stealing electricity function.
Described lead end adopts special secondary outgoing line joint, there is outdoor water-tight cable linkage function, integral body is comprised 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, corresponding one by one with contact pin position, so that the transmission of signal, another termination wire 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, during connection, match and be threaded with the nut of public butt joint outside, locking function achieves a butt joint, have easy to connect, safe and reliable advantage.
Claims (9)
1. an outdoor low voltage open-close type combination transformer, it is characterized in that: it comprises upper body (1) and the lower pour mass (2) connecting by holding screw, and be positioned at the sealing ring (3) joining to realize both sealings between upper and lower pour mass (1,2);
Described upper body (1) comprises semicircular top iron core (1-1), and the top loop epoxy layer (1-2) that this iron core is coated on to inside, only its two ends is exposed;
Described lower pour mass (2) comprises the semicircular-shaped lower portion iron core (2-1) matching with top iron core (1-1), and the bottom epoxy resin layer (2-2) that this iron core is coated on to inside, only its two ends is exposed; On described bottom iron core (2-1), be wound with secondary winding; Described bottom epoxy resin layer (2-2) is gone up, on the face of upper body (1), is processed with two ring annular grooves (2-3), and two circle grooves (2-3) lay respectively at the outer ring at bottom iron core (2-1) both ends, and 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;
On described bottom epoxy resin layer (2-2), be provided with conductive insert (4), this conductive insert is offered screwed hole on (4), this hole internal thread is connected with for puncturing cable insulation skin to obtain the power taking screw (5) of voltage signal, conductive insert (4) is connected with voltage sampling wire near bottom epoxy resin layer (2-2) side, and this voltage sampling wire free end causes instrument transformer outside.
2. outdoor low voltage open-close type combination transformer according to claim 1, it is characterized in that: the two ends that expose on described top iron core (1-1) exceed top loop epoxy layer (1-2) plane 3mm, the two ends that bottom iron core (2-1) exposes are with respect to the inside recessed 2.5mm of bottom epoxy resin layer (2-2) plane.
3. outdoor low voltage open-close type combination transformer according to claim 1 and 2, 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.
4. outdoor low voltage open-close type combination transformer according to claim 3, is characterized in that: the upper installation folder (6) that circular arc is installed by screw of described bottom epoxy resin layer (2-2), its opening is relative with the opening of lower pour mass (2).
5. outdoor low voltage open-close type combination transformer according to claim 1 and 2, is characterized in that: described bottom epoxy resin layer (2-2) is provided with lead end (7), and described voltage sampling wire free end is drawn by this lead end; In described secondary winding, be connected with current sampling wire, this wire free end is drawn and is realized current sampling by lead end (7).
6. outdoor low voltage open-close type combination transformer according to claim 1 and 2, it is characterized in that: described top iron-core coil (1-1) is identical with bottom iron-core coil (2-1) structure, both are around in the secondary winding composition on this iron core by iron core and monolateral coiling.
7. 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.
8. 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.
9. outdoor low voltage open-close type combination transformer according to claim 1 and 2, is characterized in that: described groove (2-3) width is 5mm, and the degree of depth is 3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320531828.0U CN203433986U (en) | 2013-08-29 | 2013-08-29 | Outdoor low-voltage open-close type combined mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320531828.0U CN203433986U (en) | 2013-08-29 | 2013-08-29 | Outdoor low-voltage open-close type combined mutual inductor |
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| Publication Number | Publication Date |
|---|---|
| CN203433986U true CN203433986U (en) | 2014-02-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320531828.0U Withdrawn - After Issue CN203433986U (en) | 2013-08-29 | 2013-08-29 | Outdoor low-voltage open-close type combined mutual inductor |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103456477A (en) * | 2013-08-29 | 2013-12-18 | 宁波恒力达科技有限公司 | Outdoor low-pressure opening and closing type combined mutual inductor |
| CN103996508A (en) * | 2014-05-26 | 2014-08-20 | 国家电网公司 | Mutual inductor with waterproof casing |
| CN104779046A (en) * | 2015-04-28 | 2015-07-15 | 北京瑞奇恩互感器设备有限公司 | Anti-noise open-close type current transformer |
| CN105405623A (en) * | 2015-11-20 | 2016-03-16 | 国网山东省电力公司电力科学研究院 | Open type transformer |
| CN110619998A (en) * | 2019-07-08 | 2019-12-27 | 河南平高电气股份有限公司 | Shielding case and voltage transformer using same |
| CN110619997A (en) * | 2019-07-08 | 2019-12-27 | 河南平高电气股份有限公司 | Voltage transformer and shielding case thereof |
| CN113053625A (en) * | 2021-03-15 | 2021-06-29 | 周凌俐 | Open-close type mutual inductor |
-
2013
- 2013-08-29 CN CN201320531828.0U patent/CN203433986U/en not_active Withdrawn - After Issue
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103456477A (en) * | 2013-08-29 | 2013-12-18 | 宁波恒力达科技有限公司 | Outdoor low-pressure opening and closing type combined mutual inductor |
| CN103456477B (en) * | 2013-08-29 | 2016-04-13 | 宁波恒力达科技有限公司 | Outdoor low voltage open-close type combination transformer |
| CN103996508A (en) * | 2014-05-26 | 2014-08-20 | 国家电网公司 | Mutual inductor with waterproof casing |
| CN103996508B (en) * | 2014-05-26 | 2016-04-13 | 国家电网公司 | A kind of instrument transformer with water proof type shell |
| CN104779046A (en) * | 2015-04-28 | 2015-07-15 | 北京瑞奇恩互感器设备有限公司 | Anti-noise open-close type current transformer |
| CN105405623A (en) * | 2015-11-20 | 2016-03-16 | 国网山东省电力公司电力科学研究院 | Open type transformer |
| CN110619998A (en) * | 2019-07-08 | 2019-12-27 | 河南平高电气股份有限公司 | Shielding case and voltage transformer using same |
| CN110619997A (en) * | 2019-07-08 | 2019-12-27 | 河南平高电气股份有限公司 | Voltage transformer and shielding case thereof |
| CN110619997B (en) * | 2019-07-08 | 2020-11-20 | 河南平高电气股份有限公司 | Voltage transformer and shielding case thereof |
| CN113053625A (en) * | 2021-03-15 | 2021-06-29 | 周凌俐 | Open-close type mutual inductor |
| CN113053625B (en) * | 2021-03-15 | 2022-05-10 | 周凌俐 | Open-close type mutual inductor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140212 Effective date of abandoning: 20160413 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |