A winding device for a double-winding busbar current transformer

Abstract

The present invention relates to the technical field of current transformers, and in particular to a winding device for a double-winding busbar current transformer, which is used for winding a conductor and an insulating cloth on a transformer core. The winding device comprises a substrate, on which a clamping and loading and unloading mechanism suitable for transformer cores of different specifications and a winding mechanism for winding insulating cloth and conductors are installed; transformer cores of different specifications are clamped and fixed by the clamping and loading and unloading mechanism, and the transformer cores are transported at a loading station, a winding station and a unloading station, so as to realize automatic loading and unloading of the transformer core.

Description

Technical Field

[0001] The invention relates to the technical field of current transformers, and in particular to a winding device of a double-winding busbar current transformer. Background Art

[0002] Busbar current transformers are widely used in industrial enterprises and residential buildings. They are connected in series to power lines to measure the current and power consumption of users.

[0003] The theoretical basis for the design of current transformers is based on the ampere-turn balance principle: I1*N1=I2*N2, where I1 is the rated primary current, N1 is the primary turns (the primary turns of the busbar current transformer are all one turn), I2 is the rated secondary current (generally 5A), and N2 is the secondary turns; at this time, the rated ampere-turns of the current transformer are entirely determined by the rated primary current. The above formula shows that N2=I1 / 5, that is, the secondary turns of the current transformer are equal to the rated primary current divided by 5 (rated secondary current). When the rated primary current is small, the secondary turns of the current transformer are also correspondingly small.

[0004] Since the rated primary current of the current transformer is small, the rated ampere-turns are also small, the secondary turns of the current transformer are small, and the error compensation value of one turn is too large, it is impossible to use the method of reducing turns compensation to improve the accuracy level of the current transformer through error compensation.

[0005] The most effective technical measure to improve the accuracy level is to increase the rated ampere-turns of the current transformer. The primary turns of the busbar current transformer are fixed, i.e. one turn. Increasing the rated ampere-turns of the current transformer can only increase the rated primary current of the current transformer, and the rated primary current of the current transformer is a fixed value determined by the power grid; therefore, the accuracy level of a single-turn busbar current transformer with a small transformation ratio (i.e. low ampere-turns) is generally not very high;

[0006] Due to the different winding speeds and starting and ending winding positions of the wire and the insulating cloth, the existing winding device cannot realize automatic winding of the wire and the insulating cloth, and manual winding of the insulating cloth is required, while manual assistance is required to realize the feeding, cutting and winding of the wire and the insulating cloth. Summary of the invention

[0007] The problem to be solved by the present invention is to provide a winding device for a double-winding busbar current transformer, which solves the above-mentioned technical problem.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] A double-winding busbar current transformer comprises a shell and a secondary winding. Two secondary windings are installed inside the shell. The secondary winding comprises a transformer core. Two layers of wires are wound around the outside of the transformer core. A layer of insulating cloth is wound between the two layers of wires. The output terminals of the two secondary windings are connected in parallel.

[0010] A winding device for a double-winding busbar current transformer, which is used for winding a conductor and an insulating cloth on a transformer core, comprises a substrate, on which a clamping and loading and unloading mechanism suitable for transformer cores of different specifications and a winding mechanism for winding insulating cloth and conductors are installed;

[0011] A first motor is installed at the end of the substrate, a threaded rod is installed at the output end of the first motor, and a sliding block is threadedly installed on the threaded rod.

[0012] Preferably, the clamping loading and unloading mechanism includes an electric rotating table fixedly connected to the slider, the rotating end of the electric rotating table is equipped with a support arm, a C-shaped fixed seat is installed on the support arm, and a plurality of adjustment seats are arranged at equal angles on the C-shaped fixed seat, a slide groove is opened in the middle of the adjustment seat, and slide rails are arranged on the bottom side of the adjustment seat and on both sides of the slide groove in parallel, a slide frame is slidably installed on the slide rail, and a rubber wheel is rotatably installed on the bottom side of the slide frame.

[0013] Preferably, a C-shaped rotating seat is rotatably mounted on the top side of the C-shaped fixed seat, a plurality of arc-shaped grooves are opened at equal angles on the C-shaped rotating seat, and external teeth are arranged on the outer side of the C-shaped rotating seat.

[0014] Preferably, a second motor is installed in one of the slides, and the output end of the second motor is connected to the rubber wheel, a mounting plate is installed at the outer end of one of the slides, a third motor is installed on the bottom side of the mounting plate, a rotating tooth is installed at the output end of the third motor, and the rotating tooth is meshed with the external tooth, and a guide rod passing through the slide groove and the arc groove is installed on the slide.

[0015] Preferably, the winding mechanism comprises a vertical plate, on which a first C-ring seat and a second C-ring seat are rotatably mounted, and material transfer ports are provided on the first C-ring seat and the second C-ring seat.

[0016] Preferably, both the first C-ring seat and the second C-ring seat are equipped with mounting rods, the mounting rod of the first C-ring seat is equipped with a first reel for winding insulating cloth, and the mounting rod of the second C-ring seat is equipped with a second reel for winding wire;

[0017] The first C-ring seat is provided with a first protrusion on one side and a first meshing tooth on the other side, and the second C-ring seat is provided with a second protrusion on one side and a second meshing tooth on the other side.

[0018] Preferably, a plurality of rotating shafts are installed on one side of the vertical plate, and limiting wheels are installed on both ends of the rotating shafts, and the first protrusion of the first C ring seat and the second protrusion of the second C ring seat are both located between the limiting wheels;

[0019] A fourth motor and a fifth motor are installed on the other side of the vertical plate, a first driving tooth is installed on the output end of the fourth motor, two first driven teeth and two second driven teeth are installed on one side of the vertical plate, and the two first driven teeth are respectively meshed with the first driving tooth and the first meshing tooth;

[0020] The output end of the fifth motor is provided with a second driving tooth, and the two second driven teeth are respectively meshed with the second driving tooth and the second meshing tooth.

[0021] Preferably, two clamping rollers are installed inside the first C-ring seat and the second C-ring seat, and one of the clamping rollers is connected to the output end of the sixth motor, and pneumatic scissors are installed inside the first C-ring seat and the second C-ring seat.

[0022] Preferably, two clamping assemblies are symmetrically mounted on the base plate, the clamping assemblies include a motor seat, a seventh motor is mounted on the motor seat, a rotating arm is mounted on the output end of the seventh motor, a support rod is mounted on the rotating arm, and a pneumatic clamp is mounted on the support rod.

[0023] The beneficial effects of the present invention are as follows: two identical secondary windings are combined in a housing, and the outlet terminals of the two secondary windings are connected in parallel to form a brand-new busbar current transformer, thereby realizing a busbar current transformer with a higher accuracy level, having low manufacturing cost, strong operability, and being easy to promote;

[0024] The transformer cores of different specifications are clamped and fixed through the clamping loading and unloading mechanism, and the transformer cores are transported at the loading station, winding station and unloading station to realize automatic loading and unloading of the transformer cores;

[0025] The insulating cloth and the wire are automatically conveyed by the rotating clamping rollers on the winding mechanism, the insulating cloth and the wire are cut by pneumatic scissors, the clamping assembly is used to clamp and guide the ends of the insulating cloth and the wire, and then the winding mechanism is used to wind the insulating cloth on the transformer core and the second layer of the wire, which greatly improves the processing efficiency of the secondary winding. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the current transformer of the present invention;

[0027] Figure 2 Schematic diagram of the internal structure of the current transformer of the present invention;

[0028] Figure 3 It is a schematic diagram of the structure of the winding device of the present invention;

[0029] Figure 4 This is a schematic diagram of the first structure of the clamping loading and unloading mechanism of the present invention;

[0030] Figure 5 This is a second structural schematic diagram of the clamping loading and unloading mechanism of the present invention;

[0031] Figure 6 It is a first structural schematic diagram of the winding mechanism of the present invention;

[0032] Figure 7 It is a first structural schematic diagram of the winding mechanism of the present invention;

[0033] Figure 8 For the present invention Figure 7 A partial enlarged view of area A.

[0034] Legend:

[0035] 1. Shell; 2. Secondary winding; 3. Transformer core; 4. Wire; 5. Outlet terminal; 6. Base plate; 7. Clamping and loading and unloading mechanism; 8. Winding mechanism; 9. First motor; 10. Threaded rod; 11. Electric rotating table; 12. Support arm; 13. C-shaped fixed seat; 14. Adjustment seat; 15. Slide rail; 16. Slide rack; 17. Rubber wheel; 18. Second motor; 19. Slide groove; 20. C-shaped rotating seat; 21. Arc groove; 22. Guide rod; 23. Mounting plate; 24. Third motor; 25. Rotating gear; 26. External gear; 27. Vertical plate; 28. Rotating shaft; 29. Limiting wheel; 30, first C-ring seat; 31, second C-ring seat; 32, material transfer port; 33, first protrusion; 34, first meshing tooth; 35, second protrusion; 36, second meshing tooth; 37, fourth motor; 38, first driving tooth; 39, first driven tooth; 40, fifth motor; 41, second driving tooth; 42, second driven tooth; 43, mounting rod; 44, first reel; 45, second reel; 46, sixth motor; 47, clamping roller; 48, pneumatic scissors; 49, motor seat; 50, seventh motor; 51, rotating arm; 52, supporting rod; 53, pneumatic clamp. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Specific examples are given below.

[0038] See also Figure 1 and Figure 2 A double-winding busbar current transformer comprises a shell 1 and a secondary winding 2. Two secondary windings 2 are installed inside the shell 1. The secondary winding 2 comprises a transformer core 3. Two layers of wires 4 are wound around the outer side of the transformer core 3. A layer of insulating cloth is wound between the two layers of wires 4. The outlet terminals 5 of the two secondary windings 2 are connected in parallel. Two secondary windings 2 with the same performance parameters are merged in the shell 1, and the outlet terminals 5 of the two secondary windings 2 are connected in parallel to form a brand-new busbar current transformer, which realizes a busbar current transformer with a higher accuracy level, has low manufacturing cost, strong operability, and is easy to promote.

[0039] See also Figure 3-Figure 5 A winding device for a double-winding busbar current transformer, the winding device is used for winding a conductor 4 and an insulating cloth on a transformer core 3, the winding device comprises a substrate 6, on which a clamping and loading and unloading mechanism 7 suitable for transformer cores 3 of different specifications and a winding mechanism 8 for winding insulating cloth and conductor 4 are installed;

[0040] A first motor 9 is installed at the end of the substrate 6, and a threaded rod 10 is installed at the output end of the first motor 9, and a slider is threadedly installed on the threaded rod 10. The first motor 9 drives the threaded rod 10 to rotate, and then drives the threaded slider to move, thereby realizing the overall movement of the clamping loading and unloading mechanism 7.

[0041] The clamping loading and unloading mechanism 7 includes an electric rotating table 11 fixedly connected to the slider, a support arm 12 is installed at the rotating end of the electric rotating table 11, a C-shaped fixed seat 13 is installed on the support arm 12, and a plurality of adjustment seats 14 are arranged at equal angles on the C-shaped fixed seat 13, a slide groove 19 is opened in the middle of the adjustment seat 14, and a slide rail 15 is arranged on the bottom side of the adjustment seat 14 and on both sides of the slide groove 19 in parallel, a slide 16 is slidably installed on the slide rail 15, and a rubber wheel 17 is rotatably installed on the bottom side of the slide 16, a C-shaped rotating seat 20 is rotatably installed on the top side of the C-shaped fixed seat 13, an arc-shaped guide block is arranged on the top side of the C-shaped fixed seat 13, and the C-shaped rotating seat A guide groove adapted to the guide block is provided on the bottom side of 20, so that the C-shaped swivel seat 20 can rotate along the guide block through the guide groove. A plurality of arc grooves 21 are provided at equal angles on the C-shaped swivel seat 20. An external tooth 26 is provided on the outer side of the C-shaped swivel seat 20. A second motor 18 is installed in one of the slides 16, and the output end of the second motor 18 is connected to the rubber wheel 17. A mounting plate 23 is installed on the outer end of one of the slides 16, and a third motor 24 is installed on the bottom side of the mounting plate 23. A rotating tooth 25 is installed on the output end of the third motor 24, and the rotating tooth 25 is meshed with the external tooth 26. A guide rod 22 that passes through the slide groove 19 and the arc groove 21 is installed on the slide 16.

[0042] The support arm 12 and the C-shaped fixed seat 13 are rotated by the electric rotating table 11. When the C-shaped fixed seat 13 rotates to the top of the loading platform, the loading platform drives the transformer core 3 to move upward. At this time, the third motor 24 drives the rotating teeth 25 to rotate, and cooperates with the meshing external teeth 26 to drive the C-shaped rotating seat 20 to rotate. At this time, the C-shaped rotating seat 20 acts on the guide rod 22 in the arc groove 21, driving the guide rod 22 to move along the slide groove 19, and the slide 16 moves along the slide rail 15 until the rubber wheel 17 contacts the outer side of the transformer core 3, so as to realize the clamping and limiting of the transformer core 3, and then the electric rotating table 11 is rotated to rotate the transformer core 3 to the material transfer port 32 for winding the insulating cloth and the wire 4. After the winding is completed, the secondary winding 2 is automatically placed on the transmission belt for conveying and unloading through the clamping loading and unloading mechanism 7.

[0043] See also Figure 6-Figure 8 The winding mechanism 8 includes a vertical plate 27, on which a first C-ring seat 30 and a second C-ring seat 31 are rotatably mounted, and a material transfer port 32 is provided on the first C-ring seat 30 and the second C-ring seat 31, and mounting rods 43 are installed on the first C-ring seat 30 and the second C-ring seat 31, a first reel 44 for winding an insulating cloth is installed on the mounting rod 43 of the first C-ring seat 30, and a second reel 45 for winding a wire 4 is installed on the mounting rod 43 of the second C-ring seat 31, a first protrusion 33 is provided on one side of the first C-ring seat 30, and a first meshing tooth 34 is provided on the other side of the first C-ring seat 30, a second protrusion 35 is provided on one side of the second C-ring seat 31, and a second meshing tooth 36 is provided on the other side of the second C-ring seat 31;

[0044] A plurality of rotating shafts 28 are installed on one side of the vertical plate 27, and limiting wheels 29 are installed on both ends of the rotating shafts 28. The first protrusion 33 of the first C ring seat 30 and the second protrusion 35 of the second C ring seat 31 are both located between the limiting wheels 29. A fourth motor 37 and a fifth motor 40 are installed on the other side of the vertical plate 27. A first driving tooth 38 is installed on the output end of the fourth motor 37. Two first driven teeth 39 and two second driven teeth 42 are installed on one side of the vertical plate 27, and the two first driven teeth 39 are respectively meshed with the first driving tooth 38 and the first meshing tooth 34. A second driving tooth 41 is installed on the output end of the fifth motor 40, and the two second driven teeth 42 are respectively meshed with the second driving tooth 41 and the second meshing tooth 36.

[0045] Two clamping rollers 47 are installed inside the first C-ring seat 30 and the second C-ring seat 31, and one of the clamping rollers 47 is connected to the output end of the sixth motor 46. Pneumatic scissors 48 are installed inside the first C-ring seat 30 and the second C-ring seat 31;

[0046] Two clamping assemblies are symmetrically mounted on the base plate 6, and the clamping assemblies include a motor base 49, a seventh motor 50 is mounted on the motor base 49, a rotating arm 51 is mounted on the output end of the seventh motor 50, a support rod 52 is mounted on the rotating arm 51, and a pneumatic clamping claw 53 is mounted on the support rod 52;

[0047] The first reel 44 wound with the insulating cloth and the second reel 45 wound with the wire 4 are mounted on the mounting rod 43, and the insulating cloth and the wire 4 are passed through the clamping roller 47 and the pneumatic scissors 48 respectively, and the clamping roller 47 is driven to rotate by the sixth motor 46, so as to transport the insulating cloth and the wire 4, and the seventh motor 50 is driven to rotate the rotating arm 51, so as to move the pneumatic clamping jaw 53 on the support rod 52 to the material transfer port 32, and the insulating cloth and the wire 4 are clamped by the pneumatic clamping jaw 53;

[0048] The insulating cloth and the wire 4 are clamped by the clamping assembly. At this time, the fifth motor 40 drives the second active tooth 41 to rotate, and then drives the two meshing second driven teeth 42 to rotate, meshing with the second meshing teeth 36 for transmission, and cooperates with the limiting wheel 29 through the second protrusion 35 to drive the second C ring seat 31 to rotate. At the same time, the second motor 18 drives the rubber wheel 17 to rotate, thereby realizing the rotation of the transformer core 3, and winding the wire 4 onto the transformer core 3. After winding 3-5 turns, the clamping assembly releases the clamping of the wire 4. When the part of the transformer core 3 wound with the wire 4 rotates to below the insulating cloth, the fifth motor 40 drives the second active tooth 41 to rotate, and then drives the second C ring seat 31 to rotate. At the same time, the second motor 18 drives the rubber wheel 17 to rotate, thereby realizing the rotation of the transformer core 3. The wire 4 is wound onto the transformer core 3. After winding 3-5 turns, the clamping assembly releases the clamping of the wire 4. When the part of the transformer core 3 wound with the wire 4 rotates to below the insulating cloth, the fifth motor 40 drives the second active tooth 41 to rotate, and then meshing with the second meshing teeth 36. The four motors 37 drive the first active teeth 38 to rotate, and then drive the two meshing first driven teeth 39 to rotate, meshing with the first meshing teeth 34 for transmission, and cooperate with the limiting wheel 29 through the first protrusion 33 to drive the first C-ring seat 30 to rotate, and wind the insulating cloth around the outside of the first layer of wire 4. When the outside of the first layer of wire 4 is completely wrapped with insulating cloth, the pneumatic scissors 48 in the first C-ring seat 30 cut the insulating cloth, and the second C-ring seat 31 continues to rotate to wind the second layer of wire 4 around the outside of the insulating cloth, and when the two layers of wire 4 are wound, the pneumatic scissors 48 in the second C-ring seat 31 cut the wire 4.

[0049] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A winding device for a double-winding busbar current transformer, characterized in that: The winding device is used for winding a conductor (4) and an insulating cloth on a transformer core (3), and comprises a base plate (6), on which a clamping and loading and unloading mechanism (7) suitable for transformer cores (3) of different specifications and a winding mechanism (8) for winding the insulating cloth and the conductor are installed; A first motor (9) is mounted on the end of the base plate (6); a threaded rod (10) is mounted on the output end of the first motor (9); and a sliding block is threadedly mounted on the threaded rod (10); The clamping loading and unloading mechanism (7) comprises an electric rotating table (11) fixedly connected to a slider, a supporting arm (12) being installed at a rotating end of the electric rotating table (11), a C-shaped fixed seat (13) being installed on the supporting arm (12), a plurality of adjusting seats (14) being arranged at equal angles on the C-shaped fixed seat (13), a sliding groove (19) being provided in the middle of the adjusting seat (14), a sliding rail (15) being arranged on the bottom side of the adjusting seat (14) and on both sides of the sliding groove (19) in parallel, a sliding frame (16) being slidably installed on the sliding rail (15), and a rubber wheel (17) being rotatably installed on the bottom side of the sliding frame (16), and a C-shaped fixed seat (13) being rotatably installed on the top side. A rotating seat (20), wherein a plurality of arcuate grooves (21) are formed at equal angles on the C-shaped rotating seat (20), an outer side of the C-shaped rotating seat (20) is provided with an outer tooth (26), a second motor (18) is installed in one of the slides (16), and an output end of the second motor (18) is connected to a rubber wheel (17), a mounting plate (23) is installed at an outer end of one of the slides (16), a third motor (24) is installed on the bottom side of the mounting plate (23), a rotating tooth (25) is installed at an output end of the third motor (24), and the rotating tooth (25) is meshed with the outer tooth (26), and a guide rod (22) penetrating the slide groove (19) and the arcuate groove (21) is installed on the slide (16); The winding mechanism (8) comprises a vertical plate (27), a first C-ring seat (30) and a second C-ring seat (31) are rotatably mounted on the vertical plate (27), and a material transfer port (32) is provided on the first C-ring seat (30) and the second C-ring seat (31), a mounting rod (43) is mounted on both the first C-ring seat (30) and the second C-ring seat (31), a first reel (44) for winding an insulating cloth is mounted on the mounting rod (43) of the first C-ring seat (30), and a second reel (45) for winding a conductive wire (4) is mounted on the mounting rod (43) of the second C-ring seat (31); A first protrusion (33) is provided on one side of the first C-ring seat (30), and a first meshing tooth (34) is provided on the other side of the first C-ring seat (30); a second protrusion (35) is provided on one side of the second C-ring seat (31), and a second meshing tooth (36) is provided on the other side of the second C-ring seat (31); a plurality of rotating shafts (28) are mounted on one side of the vertical plate (27), and limiting wheels (29) are mounted on both ends of the rotating shafts (28); the first protrusion (33) of the first C-ring seat (30) and the second protrusion (35) of the second C-ring seat (31) are both located between the limiting wheels (29); A fourth motor (37) and a fifth motor (40) are mounted on the other side of the vertical plate (27); a first driving tooth (38) is mounted on the output end of the fourth motor (37); two first driven teeth (39) and two second driven teeth (42) are mounted on one side of the vertical plate (27); the two first driven teeth (39) are respectively meshed with the first driving tooth (38) and the first meshing tooth (34); a second driving tooth (41) is mounted on the output end of the fifth motor (40); the two second driven teeth (42) are respectively meshed with the second driving tooth (41) and the second meshing tooth (36); Two clamping rollers (47) are installed inside the first C-ring seat (30) and the second C-ring seat (31), and one of the clamping rollers (47) is connected to the output end of the sixth motor (46). Pneumatic scissors (48) are installed inside the first C-ring seat (30) and the second C-ring seat (31).

2. The winding device of a double-winding busbar current transformer according to claim 1, characterized in that: Two material clamping assemblies are symmetrically mounted on the base plate (6), the material clamping assemblies comprising a motor seat (49), a seventh motor (50) being mounted on the motor seat (49), a rotating arm (51) being mounted on the output end of the seventh motor (50), a supporting rod (52) being mounted on the rotating arm (51), and a pneumatic clamping claw (53) being mounted on the supporting rod (52).

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