CN114823104A

CN114823104A - Anti-electricity-theft mutual inductor

Info

Publication number: CN114823104A
Application number: CN202210591662.5A
Authority: CN
Inventors: 陈金业; 刘中华; 裴庆虎; 刘瑶; 王力崇; 谢志远
Original assignee: HEBEI SHENKE ELECTRONICS CO Ltd; Hebei Shenke Intelligent Manufacturing Co ltd; Hebei Shenke Magnetic Materials Co ltd; Hebei Shenke Mould Co ltd; Shenke Technology Group Co ltd; Hebei Shenke Electric Power Co ltd
Current assignee: HEBEI SHENKE ELECTRONICS CO Ltd; Hebei Shenke Intelligent Manufacturing Co ltd; Hebei Shenke Magnetic Materials Co ltd; Hebei Shenke Mould Co ltd; Shenke Technology Group Co ltd; Hebei Shenke Electric Power Co ltd
Priority date: 2022-05-27
Filing date: 2022-05-27
Publication date: 2022-07-29

Abstract

The invention discloses an electricity larceny prevention mutual inductor, which relates to the technical field of mutual inductors and comprises a bottom plate, a first casting body, a primary winding, a secondary winding, a primary terminal and a secondary terminal, wherein the first casting body is arranged on the bottom plate and is cast by means of a mold, the primary winding and the secondary winding are fixedly sealed in the first casting body, the primary terminal is arranged at the upper end of the first casting body and is electrically connected with the primary winding, the secondary terminal is arranged on one side of the first casting body and is electrically connected with the secondary winding, a second casting body and a data circuit board are additionally arranged on one side of the first casting body, the data circuit board is fixedly sealed in the second casting body, a monitoring coil is additionally arranged in the secondary winding at an interval with the metering coil, and the monitoring coil is electrically connected with the data circuit board.

Description

Anti-electricity-theft mutual inductor

Technical Field

The invention relates to the technical field of transformers, in particular to an electricity larceny prevention transformer.

Background

The current transformer converts different rated primary currents into standard rated secondary currents by utilizing the principle of electromagnetic induction, is mainly used for metering, measuring and electromechanical protection in a power system distribution network, and is provided with an electricity larceny prevention measure.

At present, a mechanical lead sealing structure commonly adopted by a current transformer for metering is used for preventing a user from stealing electricity, although the current transformer can effectively prevent the electricity stealing behaviors of most users to a certain extent, due to the limitation of the structure of the current transformer, the possibility that an individual user changes a line privately and then changes a lead sealing device by himself is not eliminated, when electricity stealing is found, a national grid company cannot provide strong evidence to prove the time and the change condition of the line change, the potential hidden danger of electricity stealing by the user needs to be compensated, and the electricity stealing prevention and monitoring technical level needs to be improved.

Disclosure of Invention

In order to solve the problems, the invention provides the electricity larceny prevention mutual inductor which is characterized in that the current data are collected and stored by additionally arranging the second pouring body and the data circuit board, so that electricity larceny is effectively prevented.

The invention adopts the technical scheme that the electricity larceny prevention mutual inductor comprises a bottom plate, a first pouring body, a primary winding, a secondary winding, a primary terminal and a secondary terminal, wherein the first pouring body is arranged on the bottom plate and poured by means of a mold, the primary winding is fixedly sealed in the first pouring body, the secondary winding is provided with a metering coil, the primary terminal is arranged at the upper end of the first pouring body and is electrically connected with the primary winding, the secondary terminal is arranged on one side of the first pouring body and is electrically connected with the secondary winding, a second pouring body and a data circuit board are additionally arranged on one side of the first pouring body and is fixedly sealed in the second pouring body, a monitoring coil arranged at an interval with the metering coil is additionally arranged in the secondary winding, and the monitoring coil is electrically connected with the data circuit board.

The secondary terminal and the metering coil are arranged on the same side, the data circuit board and the monitoring coil are arranged on the same side and are opposite to each other, and the outer side of the second casting body and one side of the first casting body are in the same plane.

The bottom plate upper end is provided with rings, and rings distribute around first pouring body, be provided with the shroud on the secondary terminal.

The primary winding is in a rectangular annular structure, and the secondary winding is in a circular annular structure.

The primary winding, the metering coil and the monitoring coil are all provided with insulating coating layers, and the metering coil and the monitoring coil are all provided with electromagnetic shielding coating layers outside the insulating coating layers.

The mould includes the right board of front bezel, back plate, left board, L type, has the upper plate and the hypoplastron of plug hole and encloses and form the box structure, the contained angle department of left side board and upper plate is provided with the cushion, the cushion upper end is fixed with the upper plate inboard, and the interval sets up between cushion and the left board.

The front end and the rear end of the cushion block are respectively attached to the front plate and the rear plate.

All be provided with the seal ring groove on the relative one side of upper plate and hypoplastron, the seal ring groove is the same with the outward flange shape of upper plate and hypoplastron respectively, the distance of seal ring groove and upper plate or hypoplastron periphery is less than the thickness of front bezel, back plate, left plate, right plate.

The improved mould-dismounting device is characterized in that a long slotted hole is formed in the middle of the upper plate, a limiting groove is formed in one surface, opposite to the upper plate, of the lower plate, a limiting column is arranged in the limiting groove, a supporting column is arranged at the bottom end of the lower plate, mould-dismounting grooves are formed in the outer edges of the front plate, the rear plate, the left plate, the right plate, the upper plate and the lower plate, and a boss is arranged on one surface, opposite to the left plate and the right plate, of the upper plate.

The distance between right side board upper portion and the left board is greater than the distance between right side board lower part and the left board, the contained angle department of right side board and upper plate sets up the backing plate, be provided with mounting groove and be provided with a plurality of pin holes in the mounting groove on the backing plate, the backing plate sets up on the face of buckling of right board.

The invention has the beneficial effects that:

1. the second pouring body is added on the first pouring body, the appearance of the first pouring body is not changed, the volume of the first pouring body is not increased, the second pouring body is internally fixedly sealed with a data circuit board, the secondary winding is additionally provided with a monitoring coil, the current is detected through the data circuit board and the monitoring coil, the data circuit board and the monitoring coil are fixedly sealed by pouring, and no external connecting end exists, so that the situation that a power stealing user moves hands and feet on the mutual inductor is effectively avoided, the data circuit board can store and transmit current data, the transmission mode adopts wireless transmission, the data can be checked and retrieved only through an encrypted wireless transmission mode, and when the power stealing of the user is found, the time for the power stealing of the user can be found and the time can be used as a power stealing evidence of the user through retrieving the current data stored in the data circuit board;

2. in order to ensure that the secondary winding is not interfered with the metering coil, an insulating coating layer and an electromagnetic shielding coating layer are added outside the metering coil and the monitoring coil, and the voltage of the data circuit board is different from that of the primary winding and the secondary winding, so that the first pouring body is poured by resin, and the second pouring body is poured by black polyurethane pouring sealant;

3. the first pouring body is additionally provided with the second pouring body, so that a special die is required during pouring, the special die is inverted during pouring, a pouring groove of the second pouring body is reserved on the first pouring body through adding the cushion block, and after the first pouring body is finished, the data circuit board is connected with the pin of the monitoring coil and then secondary pouring is carried out;

4. the front plate, the rear plate, the left plate and the right plate are arranged between the upper plate and the lower plate, the sealing ring grooves are arranged on the upper plate and the lower plate and are respectively attached to fixed positions of the front plate, the rear plate, the left plate and the right plate, the sealing ring grooves are not exposed in an inner cavity of the mold, the edges of the first poured body poured out can be more regular, the bolts are adopted in a fixing mode, the disassembly and assembly are convenient, the sealing strips are arranged in the sealing ring grooves, and the sealing performance of the mold is guaranteed.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a structure within a first casting;

FIG. 3 is a schematic view of another orientation of the structure within the first casting;

FIG. 4 is a schematic structural view of a mold;

FIG. 5 is a schematic view of the structure of the interior of the mold;

FIG. 6 is a schematic view of the mold internal structure in another orientation;

FIG. 7 is a schematic view of the internal structure of the mold in another direction

In the drawing, 1, a bottom plate, 2, a first casting body, 3, a primary winding, 4, a metering coil, 5, a primary terminal, 6, a secondary terminal, 7, a secondary winding, 8, a second casting body, 9, a data circuit board, 10, a monitoring coil, 11, a lifting ring, 12, a cover cap, 13, a front plate, 14, a rear plate, 15, a left plate, 16, a right plate, 17, a casting hole, 18, an upper plate, 19, a lower plate, 20, a cushion block, 21, a sealing ring groove, 22, a slotted hole, 23, a limiting groove, 24, a limiting column, 25, a supporting column, 26, a mold removal groove, 27, a boss, 28 and a cushion plate.

Detailed Description

As shown in fig. 1-3, the present invention provides an electricity larceny prevention transformer, which includes a bottom plate 1, a first casting body 2 disposed on the bottom plate 1 and cast by means of a mold, a primary winding 3 and a secondary winding 7 with a metering coil 4 fixedly sealed in the first casting body 2, a primary terminal 5 disposed at the upper end of the first casting body 2 and electrically connected to the primary winding 3, and a secondary terminal 6 disposed at one side of the first casting body 2 and electrically connected to the secondary winding 7, wherein a second casting body 8 and a data circuit board 9 fixedly sealed in the second casting body 8 are additionally disposed at one side of the first casting body 2, a monitoring coil 10 disposed at an interval from the metering coil 4 is additionally disposed in the secondary winding 7, and the monitoring coil 10 is electrically connected to the data circuit board 9.

The monitoring coil 10 is added on the secondary winding 7, the second pouring body 8 is added on the first pouring body 2, the data circuit board 9 is fixedly sealed in the second pouring body 8, the monitoring coil 10 and the data circuit board 9 are electrically connected, the monitoring coil 10 and the data circuit board 9 are both fixedly sealed after pouring, no external connecting end exists, a fully-closed structure is formed, the monitoring coil 10 and the data circuit board 9 cannot be operated without damaging a mutual inductor, the monitoring coil 10 collects current and transmits the current to the data circuit board 9 for reading and storing after collection, the data circuit board 9 comprises collection, monitoring, communication and storage functions, current data in the data circuit board 9 can be checked and read only in a wireless communication mode, authenticity of the current data is ensured, and historical data stored in the data circuit board 9 can be called out as evidence after electricity stealing is discovered, the time for proving the electricity stealing start of the user is avoided, the user only admits to find the electricity stealing on the same day even if the user finds the electricity stealing in the prior art, and the power company has no effective evidence for proving the real start time of the electricity stealing.

As shown in fig. 2 to 3, the secondary terminal 6 is on the same side as the metering coil 4, the data circuit board 9 is on the same side as the monitoring coil 10 and on the opposite side of the secondary terminal 6, and the outer side of the second casting body 8 is on the same plane as the side of the first casting body 7.

The secondary winding 7 is installed by means of the mounting frame at the bottom of the first pouring body 2, the secondary terminal 6 and the metering coil 4 are arranged at the same side, the data circuit board 9 and the monitoring coil 10 are arranged at the same side, the length of a coil pin is reduced, and the interference between the coils and the production and processing difficulty are reduced.

As shown in fig. 1, the upper end of the bottom plate 1 is provided with a hanging ring 11, the hanging ring 11 is distributed around the first casting body 7, and the secondary terminal 6 is provided with a cover 12.

The hanging ring 11 is convenient for installation of the mutual inductor, and the cover 12 can provide protection for the secondary terminal 6.

As shown in fig. 2, the primary winding 3 has a rectangular ring structure, and the secondary winding 7 has a circular ring structure.

The primary winding 3 of the rectangular ring structure has a larger internal space without changing the size, and is suitable for the secondary windings 7 of a plurality of coils.

As shown in fig. 3, insulating coating layers are disposed outside the primary winding 3, the metering coil 4 and the monitoring coil 10, and electromagnetic shielding coating layers are disposed outside the insulating coating layers of the metering coil 4 and the monitoring coil 10.

The insulating coating and the electromagnetic shielding coating avoid current and electromagnetic interference between the coils.

As shown in fig. 4-7, the mold includes a front plate 13, a rear plate 14, a left plate 15, an L-shaped right plate 16, an upper plate 18 with a pouring hole 17, and a lower plate 19, and they are enclosed to form a box structure, a spacer 20 is disposed at an included angle between the left plate 15 and the upper plate 18, an upper end of the spacer 20 is fixed to an inner side of the upper plate 18, and the spacer 20 is spaced from the left plate 15.

The mold is a special mold for pouring the first pouring body 2, the mold is of a box body structure, the cushion block 20 is additionally arranged at the included angle between the left plate 15 and the upper plate 18, when the first pouring body 2 is poured, the position of the second pouring body 8 is reserved, two times of pouring are needed because the two pouring bodies are made of different pouring materials, a groove-shaped notch can be reserved after the first pouring body 2 is poured through the cushion block 20 and used for installing the data circuit board 9 and pouring the second pouring body 8, and the second pouring body 2 can be shielded through the bottom plate 1 after the pouring is finished, so that second-layer protection is performed.

As shown in fig. 6, the front and rear ends of the spacer 20 are respectively attached to the front and

rear plates

13 and 14.

Through the cushion block 20, a through long groove can be reserved after the first pouring body 2 is poured in advance, and compared with a groove with a closed periphery, the operation of the long groove is more convenient when the data circuit board 9 is installed.

As shown in fig. 5 and 7, the opposite surfaces of the upper plate 18 and the lower plate 19 are provided with sealing ring grooves 21, the sealing ring grooves 21 have the same shape as the outer edges of the upper plate 18 and the lower plate 19, respectively, and the distance between the sealing ring grooves 21 and the outer periphery of the upper plate 18 or the lower plate 19 is smaller than the thickness of the front plate 13, the rear plate 14, the left plate 15 and the right plate 16.

Front plate 13, back plate 14, left plate 15, right plate 16 set up between upper plate 18 and hypoplastron 19, and sealed annular 21 sets up on upper plate 18 and hypoplastron and respectively with front plate 13, back plate 14, left plate 15, the fixed position of the 16 laminating of right plate, can make the 2 edges of the first pouring body of pouring out more regular, and fixed mode adopts the bolt, makes things convenient for the dismouting, sets up the sealing strip in the sealed annular 21, guarantees the leakproofness of mould.

As shown in fig. 4, a long slot hole 22 is formed in the middle of the upper plate 18, a limiting groove 23 is formed in one surface of the lower plate 19 opposite to the upper plate 18, a limiting column 24 is arranged in the limiting groove 23, a supporting column 25 is arranged at the bottom end of the lower plate 19, mold removal grooves 26 are formed in the outer edges of the front plate 13, the rear plate 14, the left plate 15, the right plate 16, the upper plate 18 and the lower plate 19, and a boss 27 is formed in one surface of the left plate 15 opposite to the right plate 16.

The mounting panel of the secondary winding 7 is fixed to the long slotted hole 22 more conveniently before being poured, the connecting plate of the first terminal 5 is fixed to the spacing groove 23 and the spacing post 24 before being poured conveniently, the support column 25 plays a supporting role, the mold removal groove 26 is convenient for mold removal after the first pouring body 2 is poured conveniently, the boss 27 enables the two sides of the first pouring body 2 after the pouring is completed to form grooves, and the manual lifting and placing are convenient.

As shown in fig. 6, a distance between the upper portion of the right plate 16 and the left plate 15 is greater than a distance between the lower portion of the right plate 16 and the left plate 15, a backing plate 28 is disposed at an included angle between the right plate 16 and the upper plate 18, a mounting groove is disposed on the backing plate 28, a plurality of pin holes are disposed in the mounting groove, and the backing plate 28 is disposed on a bending surface of the right plate 16.

When pouring first pouring body 2, make first pouring body 2 form the L type after the pouring, backing plate 28 and mounting groove conveniently fix the connecting plate of secondary terminal 6, secondary terminal 6 sets up in the epitaxial upper end in first pouring body 2 bottom, is convenient for wiring and installation protective structure.

Claims

1. The utility model provides an anti-electricity-theft transformer, includes bottom plate (1), set up on bottom plate (1) and with the help of first pouring body (2) of mould pouring, seal primary winding (3) in first pouring body (2) and secondary winding (7) that have metering coil (4) admittedly, set up in first pouring body (2) upper end and with primary winding (3) electricity primary terminal (5) and set up in first pouring body (2) one side and secondary terminal (6) of being connected with secondary winding (7) electricity, its characterized in that: the secondary winding is characterized in that a second pouring body (8) and a data circuit board (9) fixedly sealed in the second pouring body (8) are additionally arranged on one side of the first pouring body (2), a monitoring coil (10) arranged at an interval with the metering coil (4) is additionally arranged in the secondary winding (7), and the monitoring coil (10) is electrically connected with the data circuit board (9).

2. The electricity larceny prevention transformer of claim 1, wherein: the secondary terminal (6) and the metering coil (4) are arranged on the same side, the data circuit board (9) and the monitoring coil (10) are arranged on the same side and are opposite to the secondary terminal (6), and the outer side of the second casting body (8) and one side of the first casting body (7) are in the same plane.

3. The electricity larceny prevention transformer of claim 1, wherein: bottom plate (1) upper end is provided with rings (11), and rings (11) distribute around first pouring body (7), be provided with shroud (12) on secondary terminal (6).

4. The electricity larceny prevention transformer of claim 1, wherein: the primary winding (3) is of a rectangular annular structure, and the secondary winding (7) is of a circular annular structure.

5. The electricity larceny prevention transformer of claim 1, wherein: the primary winding (3), the metering coil (4) and the monitoring coil (10) are all provided with insulating coating layers, and the metering coil (4) and the monitoring coil (10) are all provided with electromagnetic shielding coating layers outside the insulating coating layers.

6. The electricity larceny prevention transformer of claim 1, wherein: the mould includes right board (16) of front bezel (13), backplate (14), left plate (15), L type, has upper plate (18) and hypoplastron (19) of pouring hole (17) and encloses and form the box structure, the contained angle department of left side board (15) and upper plate (18) is provided with cushion (20), cushion (20) upper end and upper plate (18) inboard are fixed, and the interval sets up between cushion (20) and left plate (15).

7. The electricity larceny prevention transformer of claim 6, wherein: the front end and the rear end of the cushion block (20) are respectively attached to the front plate (13) and the rear plate (14).

8. The electricity larceny prevention transformer of claim 6, wherein: all be provided with seal ring groove (21) on the relative one side of upper plate (18) and hypoplastron (19), seal ring groove (21) are the same with the outward flange shape of upper plate (18) and hypoplastron (19) respectively, the distance of seal ring groove (21) and upper plate (18) or hypoplastron (19) periphery is less than the thickness of front bezel (13), back plate (14), left board (15), right board (16).

9. The electricity larceny prevention transformer of claim 6, wherein: the improved structure is characterized in that a long slotted hole (22) is formed in the middle of the upper plate (18), a limiting groove (23) is formed in one face, opposite to the upper plate (18), of the lower plate (19), a limiting column (24) is arranged in the limiting groove (23), a supporting column (25) is arranged at the bottom end of the lower plate (19), mold removing grooves (26) are formed in the outer edges of the front plate (13), the rear plate (14), the left plate (15), the right plate (16), the upper plate (18) and the lower plate (19), and a boss (27) is arranged on one face, opposite to the left plate (15) and the right plate (16).

10. The electricity larceny prevention transformer of claim 6, wherein: the distance between right side board (16) upper portion and left board (15) is greater than the distance between right side board (16) lower part and left board (15), the contained angle department of right side board (16) and upper plate (18) sets up backing plate (28), be provided with mounting groove on backing plate (28) and be provided with a plurality of pin holes in the mounting groove, backing plate (28) set up on the face of buckling of right side board (16).