CN210606895U - Control transformer - Google Patents

Control transformer Download PDF

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Publication number
CN210606895U
CN210606895U CN201921699268.3U CN201921699268U CN210606895U CN 210606895 U CN210606895 U CN 210606895U CN 201921699268 U CN201921699268 U CN 201921699268U CN 210606895 U CN210606895 U CN 210606895U
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CN
China
Prior art keywords
primary
epoxy body
coil
turn ratio
primary coil
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Expired - Fee Related
Application number
CN201921699268.3U
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Chinese (zh)
Inventor
陆方明
周一新
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Wuxi Kaida Telecom Electric Co Ltd
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Wuxi Kaida Telecom Electric Co Ltd
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Priority to CN201921699268.3U priority Critical patent/CN210606895U/en
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Publication of CN210606895U publication Critical patent/CN210606895U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model belongs to the technical field of the transformer and specifically relates to a control transformer is related to, including the magnetic core, primary, secondary, primary and secondary all encircle a side a week of magnetic core, still include the epoxy body, primary and secondary all pre-buried in the epoxy body, the both ends of the epoxy body are equipped with two straight holes that are parallel to each other, the both ends in two straight holes communicate with each other in the epoxy body, the both sides limit of magnetic core is worn respectively in two straight holes, the both ends of the epoxy body all are equipped with the side seal board, the side seal board is used for sealing straight hole, the relative both sides of the epoxy body all are equipped with the water package mouth of a river, two water package mouths communicate with each other with the inside in two straight holes respectively. The utility model discloses a bury primary coil and secondary coil in the epoxy is internal in advance, contact primary coil and secondary coil when making the direct downthehole cooling water circulation, improved cooling water circulation structure's safe and reliable degree.

Description

Control transformer
Technical Field
The utility model belongs to the technical field of the transformer and specifically relates to a control transformer is related to.
Background
In electricity, there is a term mutual inductance, that is, two coils (or loops) close to each other, and when a current in one coil (loop) changes, a magnetic flux in the other coil (loop) changes, and an induced electromotive force or an induced current is generated. Many products are manufactured by using the principle, and a power transformer is one of the products. The structure of the power transformer is that two (or more) coils with different turns and insulated with each other are sleeved on a closed iron core formed by laminating silicon steel sheets, one coil is connected with a power supply, the other coils are connected with a load, the coil connected with the power supply is called a primary coil (also called a primary coil), and the coil connected with the load is called a secondary coil (also called a secondary coil). By means of calculation and design, the ratio between the primary coil and the secondary coil is changed, and the primary coil is connected with an alternating voltage to obtain the required alternating voltage on the secondary coil.
The utility model discloses a utility model with grant bulletin number CN205508589U discloses a transformer for induction hardening, including transformer body, primary and secondary, the primary is a plurality of groups ring coil that constitute by conductor (copper tube), and adjacent two sets of ring coil end to end is established ties and is taken a percentage, and the primary encircles in one side a week of iron core, is equipped with the refrigerated water route on the cylindric shell to be the rectangle through the resin cladding fastening in the cylindric shell outside, and encapsulate by aluminum plate.
When the transformer works, cooling water enters the cylindrical shell and then contacts the primary coil and the secondary coil, so that potential safety hazards are caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a control transformer, it has safe cooling water circulation structure.
The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme: the utility model provides a control transformer, including the magnetic core, primary coil, secondary coil, primary coil and secondary coil all encircle a side a week of magnetic core, still include the epoxy body, primary coil and secondary coil are all pre-buried in the epoxy internally, the both ends of the epoxy body are equipped with two straight through holes that are parallel to each other, the both ends in two straight through holes communicate with each other in the epoxy body, the both sides limit of magnetic core is worn respectively in two straight through holes, the both ends of the epoxy body all are equipped with the side seal board, the side seal board is used for sealing straight through hole, the relative both sides of the epoxy body all are equipped with the water pocket mouth, two water pocket mouths communicate with each other with the inside in two.
By adopting the technical scheme, as the two ends of the two through holes are communicated in the epoxy body, cooling water circulates in the two through holes when entering the epoxy body, and the magnetic core is immersed in the cooling water, so that the cooling water can take away the heat of the magnetic core to achieve the cooling effect. The primary coil and the secondary coil are pre-buried in the epoxy body, and the cooling water in the through hole cannot contact the primary coil and the secondary coil when circulating, so that the cooling water circulation structure is safe and reliable, and the primary coil and the secondary coil are not influenced at all.
Preferably, a plurality of through holes leading to the primary coil are formed in the epoxy body, a first turn ratio binding post is arranged in each through hole, and a tap of the primary coil is connected with the first turn ratio binding post.
By adopting the technical scheme, the tap of the primary coil is conveniently connected with a power supply through the first turn ratio binding post.
Preferably, a first primary wiring and a second primary wiring are embedded in the epoxy body, one end of the first primary wiring is connected with the first joint, the other end of the first primary wiring is connected with a second turn ratio wiring terminal, one end of the second primary wiring is connected with the second joint, the other end of the second primary wiring is connected with another second turn ratio wiring terminal, the first joint and the second joint are fixed on the outer wall of the epoxy body, the first turn ratio wiring terminal and the second turn ratio wiring terminal are connected through a turn ratio adjusting plate, and the turn ratio adjusting plate is located outside the epoxy body.
By adopting the technical scheme, the first joint and the second joint are respectively communicated with the two taps on the primary coil, and when two connecting wires of the power supply are respectively connected with the first joint and the second joint, the primary coil can be connected into the power supply.
Preferably, one end of the turn ratio adjusting plate is provided with a kidney-shaped hole along the length direction, the other end of the turn ratio adjusting plate is provided with a round hole, and the outer ends of the first turn ratio wiring terminal and the second turn ratio wiring terminal are provided with threaded holes.
By adopting the technical scheme, when one end of the turn ratio adjusting plate is connected with the second turn ratio binding post, the turn ratio adjusting plate can rotate, so that the turn ratio adjusting plate can be connected with different first turn ratio binding posts, the number of turns of the primary coil connected into a power supply can be adjusted, and the effect of variable voltage adjustment is achieved.
Preferably, the secondary coil comprises a plurality of groups of C-shaped coils, an output plate is fixed on the outer wall of the epoxy body, two ends of each C-shaped coil are abutted against the output plate, a plurality of insertion holes are formed in the output plate, and the insertion holes are communicated with the end parts of the C-shaped coils.
By adopting the technical scheme, two connecting wires of the electric appliance are connected between any two jacks on the output board, and all the C-shaped coils between the two jacks are connected in series (in a mode that a lead is inserted into two adjacent jacks to connect two adjacent C-shaped coils), so that alternating voltage after transformation can be obtained in the secondary coil. Because all the C-shaped coils are not connected in series and then taps are taken to be connected with the electric appliance, the phenomenon that the whole secondary coil generates magnetic flux change can not occur, the electromagnetic conversion efficiency can be improved, and the electric energy loss is reduced.
Preferably, the primary coil is in a spiral shape, and a set of C-shaped coils are inserted into each spiral of the primary coil.
By adopting the technical scheme, the primary coil and the secondary coil are arranged in an alternating mode, so that the space utilization rate can be improved, and the transformer is compact in structure.
Preferably, a spiral insulating sheet is arranged between the C-shaped coil and the primary coil.
By adopting the technical scheme, the primary coil and the secondary coil are generally coated with paint, but the risk of damage to the paint layer exists in consideration of the heat resistance, the wear resistance and the like of the paint layer, so that the primary coil and the secondary coil are isolated by adopting the insulating sheet.
Preferably, the two ends of the epoxy body provided with the side sealing plates are provided with a circle of caulking grooves, and the caulking grooves are used for embedding the sealing rings.
Through adopting above-mentioned technical scheme, improved the waterproof sealing effect of side seal board with the epoxy body junction.
To sum up, the utility model discloses a beneficial technological effect does:
1. the primary coil and the secondary coil are pre-buried in the epoxy body, so that cooling water in the through hole cannot contact the primary coil and the secondary coil when circulating, and the safety and reliability of the cooling water circulation structure are improved;
2. the phenomenon that the whole secondary coil generates magnetic flux change can not occur during voltage transformation, the efficiency of electromagnetic transformation is improved, and the electric energy loss is reduced.
Drawings
FIG. 1 is a front view of a control transformer according to an embodiment;
FIG. 2 is a top view of the side closure plate of FIG. 1 shown hidden;
FIG. 3 is a perspective view of FIG. 2 with the magnetic core hidden;
FIG. 4 is a diagram showing the positional relationship among the core, the primary coil, and the secondary coil;
FIG. 5 is a schematic diagram of the primary coil of FIG. 4 with the primary coil hidden;
fig. 6 is a schematic diagram of the structure of the primary coil;
fig. 7 is a schematic structural view of the secondary coil;
FIG. 8 is a schematic structural diagram of a control transformer according to an embodiment after an epoxy body is hidden;
FIG. 9 is a schematic bottom view of FIG. 8;
fig. 10 is a schematic diagram of the overall structure of a control transformer in the embodiment.
In the figure, 1, a magnetic core; 2. a primary coil; 3. a secondary coil; 31. a C-shaped coil; 4. an epoxy body; 5. a side sealing plate; 6. a ladle nozzle; 7. a first turn ratio terminal; 8. a second turn ratio terminal; 9. a first primary connection; 10. a second primary connection; 11. a first joint; 12. a second joint; 13. a turn ratio adjusting plate; 14. an output plate; 15. an insulating sheet; 16. a kidney-shaped hole; 17. a circular hole; 18. a threaded hole; 19. a jack; 20. caulking grooves; 21. a through hole; 22. and a through hole.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example (b): fig. 1 is the utility model discloses a control transformer, including the epoxy body 4 of cuboid shape, the epoxy body 4 is the casing of control transformer promptly, and the both ends of the epoxy body 4 are equipped with two straight through holes 21 that are parallel to each other (see fig. 2).
As shown in fig. 3, two ends of the two through holes 21 are communicated with each other in the epoxy body 4, that is, two opposite end faces of the epoxy body 4 are provided with recesses, the same ends of the two through holes 21 are communicated with each other in the recesses, and two ends of the epoxy body 4 are provided with side sealing plates 5 for sealing the recesses and the two through holes 21. The two end faces of the epoxy body 4 for installing the side sealing plate 5 are both planes, a circle of caulking groove 20 is arranged on the plane around the sunken part, the caulking groove 20 is used for embedding a sealing ring, and the sealing ring is pressed between the plane and the side sealing plate 5.
As shown in fig. 2, two side sealing plates 5 enclose two through holes 21 into a circle of cavity, a magnetic core 1 is disposed in the circle of cavity, and two side edges of the magnetic core 1 penetrate through the two through holes 21 respectively. The epoxy body 4 is formed through a sand mold, the magnetic core 1 is firstly buried in the sand mold (the magnetic core 1 surrounds a cavity of the sand mold), the primary coil 2 (shown in figure 4) and the secondary coil 3 (shown in figure 5) are placed in the cavity of the sand mold, then the liquid epoxy material is poured into the sand mold, and after the liquid epoxy material is solidified, the sand mold is opened, so that the epoxy body 4 with the primary coil 2, the secondary coil 3 and the preset magnetic core 1 buried in advance can be obtained.
As shown in fig. 4, the primary coil 2 and the secondary coil 3 are wound around one side of the magnetic core 1.
As shown in fig. 6, the primary coil 2 is a full spiral coil.
As shown in fig. 7, the secondary coil 3 includes several sets of C-type coils 31.
As shown in fig. 4, a set of C-type coils 31 is inserted into each spiral of the primary coil 2, and a spiral insulating sheet 15 is disposed between the C-type coils 31 and the primary coil 2. The primary coil 2 and the secondary coil 3 are arranged in an inserting mode, so that the space utilization rate can be improved, and the transformer is compact in structure. The primary coil 2 and the secondary coil 3 are generally enameled, but there is a risk of damage to the enamel layer in consideration of heat resistance, wear resistance, and the like of the enamel layer, and thus the primary coil 2 and the secondary coil 3 are isolated by the insulating sheet 15.
Referring to fig. 1 and 8, an output plate 14 is fixed on the outer wall of the epoxy body 4, two ends of each C-shaped coil 31 are respectively abutted to the output plate 14, a plurality of insertion holes 19 (see fig. 9) are formed in the output plate 14, and two ends of each group of C-shaped coils 31 are respectively abutted to two adjacent insertion holes 19. Two connecting wires of the electric appliance are connected between any two jacks 19 on the output board 14, and all the C-shaped coils 31 between the two jacks 19 are connected in series (in a mode that a lead is inserted into two adjacent jacks 19 to connect two adjacent C-shaped coils 31), so that alternating voltage after transformation can be obtained in the secondary coil 3. Since all the C-type coils 31 are not connected in series and then tapped to connect the electric appliance, the phenomenon that the whole secondary coil 3 generates magnetic flux change does not occur, so that the efficiency of electromagnetic conversion can be improved, and the electric energy loss is reduced.
As shown in fig. 8, the epoxy body 4 is provided with ladle nozzles 6 (i.e., a water inlet and a water outlet) on opposite sides thereof, and the two ladle nozzles 6 are respectively communicated with the interiors of the two through holes 21. Since both ends of the two through holes 21 are communicated with each other in the epoxy body 4, the cooling water circulates in the two through holes 21 when entering the epoxy body 4, and the magnetic core 1 is immersed in the cooling water, so that the cooling water can take away the heat of the magnetic core 1 to achieve a cooling effect. Because the primary coil 2 and the secondary coil 3 are pre-embedded in the epoxy body 4, the cooling water in the through hole 21 can not contact the primary coil 2 and the secondary coil 3 when circulating, the cooling water circulation structure is safe and reliable, and has no influence on the primary coil 2 and the secondary coil 3.
As shown in fig. 10, a plurality of through holes 22 are formed on the outer surface of the epoxy body 4 to the primary coil 2, the first turn ratio terminal 7 is provided in the through hole 22, and a tap of the primary coil 2 is connected to the first turn ratio terminal 7 (see fig. 9).
As shown in fig. 8, a first primary connection wire 9 and a second primary connection wire 10 are also embedded in the epoxy body 4. One end of the first primary wiring 9 is connected with a first joint 11, and the other end of the first primary wiring is connected with a second turn ratio wiring terminal 8; one end of the second primary wiring 10 is connected to the second tab 12, and the other end is connected to the other second turn ratio terminal 8. The first connector 11 and the second connector 12 are fixed on the outer wall of the epoxy body 4 (see fig. 2), the first turn ratio binding post 7 and the second turn ratio binding post 8 are connected through a turn ratio adjusting plate 13, and the turn ratio adjusting plate 13 is positioned outside the epoxy body 4 (see fig. 10). The first connector 11 and the second connector 12 are respectively and indirectly connected with two taps on the primary coil 2, and when two connecting wires of a power supply are respectively connected with the first connector 11 and the second connector 12, the primary coil 2 can be connected to the power supply.
As shown in fig. 8, one end of the turn ratio adjusting plate 13 is provided with a kidney-shaped hole 16 along the length direction thereof, and the other end is provided with a circular hole 17. The outer ends of the first turn ratio binding post 7 and the second turn ratio binding post 8 are provided with threaded holes 18. When one end of the turn ratio adjusting plate 13 is connected with the second turn ratio binding post 8 (through a screw), the turn ratio adjusting plate 13 can rotate, so that the turn ratio adjusting plate 13 can be connected with the different first turn ratio binding post 7 (through a screw) (and the screw extends into the waist-shaped hole 16), the number of turns of the primary coil 2 connected into a power supply can be adjusted, and the effect of variable voltage adjustment is achieved.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (8)

1. The utility model provides a control transformer, includes magnetic core (1), primary coil (2), secondary coil (3), and primary coil (2) and secondary coil (3) all encircle a side a week of magnetic core (1), its characterized in that: still include the epoxy body (4), primary coil (2) and secondary coil (3) are all pre-buried in the epoxy body (4), the both ends of the epoxy body (4) are equipped with two straight through holes (21) that are parallel to each other, the both ends of two straight through holes (21) communicate with each other in the epoxy body (4), the both sides limit of magnetic core (1) is worn respectively in two straight through holes (21), the both ends of the epoxy body (4) all are equipped with side seal board (5), side seal board (5) are used for sealing straight through hole (21), the relative both sides of the epoxy body (4) all are equipped with water package mouth of a river (6), two water package mouths of a river (6) communicate with each other with the inside of two straight through holes (21) respectively.
2. A control transformer according to claim 1, characterised in that: the transformer coil is characterized in that a plurality of through holes (22) leading to the primary coil (2) are formed in the epoxy body (4), a first turn ratio binding post (7) is arranged in each through hole (22), and a tap of the primary coil (2) is connected with the first turn ratio binding post (7).
3. A control transformer according to claim 2, characterised in that: the epoxy body (4) is internally embedded with a first primary wiring (9) and a second primary wiring (10), one end of the first primary wiring (9) is connected with a first joint (11), the other end of the first primary wiring is connected with a second turn ratio wiring terminal (8), one end of the second primary wiring (10) is connected with a second joint (12), the other end of the second primary wiring is connected with another second turn ratio wiring terminal (8), the first joint (11) and the second joint (12) are fixed on the outer wall of the epoxy body (4), the first turn ratio wiring terminal (7) is connected with the second turn ratio wiring terminal (8) through a turn ratio adjusting plate (13), and the turn ratio adjusting plate (13) is located outside the epoxy body (4).
4. A control transformer according to claim 3, characterised in that: one end of the turn ratio adjusting plate (13) is provided with a kidney-shaped hole (16) along the length direction, the other end of the turn ratio adjusting plate is provided with a round hole (17), and the outer ends of the first turn ratio binding post (7) and the second turn ratio binding post (8) are provided with threaded holes (18).
5. A control transformer according to claim 1, characterised in that: the secondary coil (3) comprises a plurality of groups of C-shaped coils (31), an output plate (14) is fixed on the outer wall of the epoxy body (4), two ends of each C-shaped coil (31) are abutted to the output plate (14), a plurality of insertion holes (19) are formed in the output plate (14), and the insertion holes (19) are communicated with the end parts of the C-shaped coils (31).
6. A control transformer according to claim 5, characterised in that: the primary coil (2) is spiral, and a group of C-shaped coils (31) are inserted into each spiral of the primary coil (2).
7. A control transformer according to claim 6, characterised in that: and a spiral insulating sheet (15) is arranged between the C-shaped coil (31) and the primary coil (2).
8. A control transformer according to claim 1, characterised in that: the two ends of the epoxy body (4) provided with the side sealing plates (5) are provided with a circle of caulking grooves (20), and the caulking grooves (20) are used for embedding sealing rings.
CN201921699268.3U 2019-10-11 2019-10-11 Control transformer Expired - Fee Related CN210606895U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921699268.3U CN210606895U (en) 2019-10-11 2019-10-11 Control transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921699268.3U CN210606895U (en) 2019-10-11 2019-10-11 Control transformer

Publications (1)

Publication Number Publication Date
CN210606895U true CN210606895U (en) 2020-05-22

Family

ID=70697425

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201921699268.3U Expired - Fee Related CN210606895U (en) 2019-10-11 2019-10-11 Control transformer

Country Status (1)

Country Link
CN (1) CN210606895U (en)

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GR01 Patent grant
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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20200522

CF01 Termination of patent right due to non-payment of annual fee