An external combined mutual inductor

Abstract

The present invention relates to the field of mutual inductors, and specifically to an external combined mutual inductor, comprising a mutual inductor body and a mounting bracket, wherein a fixing plate is fixed on the mutual inductor body, a clamping ring is welded on one side of the fixing plate, and a mounting bracket is connected to the clamping ring. In this external combined mutual inductor, the secondary wiring terminal at the bottom of the casting body is located in a groove and connected to a lead-out cable, and silicone rubber for sealing the secondary terminal and the cable is cast in the groove, and the wiring terminal is sealed in the groove at the bottom of the casting body, which can not only effectively prevent electricity theft, water and pollution, but also facilitate single unit disassembly and replacement, saving money, the combined structure is easy to install, the volume is small, and the mutual inductor body is easy to fix on the line pole, and the mutual inductor body can be fixed parallel to the line pole, and the orientation of the mutual inductor body can be quickly adjusted according to demand, the overall structure is simple, the operation is simple, it has strong flexibility and adjustability, the wiring is convenient, it is not easy to cause cable distortion, and the aesthetics is greatly improved.

Description

Technical Field

[0001] The invention relates to the field of mutual inductors, in particular to an external combined mutual inductor. Background Art

[0002] A transformer, also known as an instrument transformer, is a general term for current transformers and voltage transformers. It can convert high voltage into low voltage and high current into low current. It is used in measurement or protection systems. Its main function is to convert high voltage or high current into standard low voltage (100V) or standard low current (5A or 1A, both refer to rated values) in proportion, so as to achieve standardization and miniaturization of measuring instruments, protection equipment and automatic control equipment. At the same time, the transformer can also be used to isolate high voltage systems to ensure the safety of people and equipment.

[0003] When reading low-voltage residential meters through power carriers, it is necessary to meet the requirements that the concentrator and the area meters must be powered and must be powered from the same transformer. If the concentrator has no power or draws power from other transformers, the reading of all household meters in the entire area will fail. If the total meter in the area has no power, the concentrator cannot collect total meter data. On the one hand, it cannot monitor the load situation of the entire area and cannot provide an accurate basis for production load adjustment. On the other hand, negative losses will occur in the collection system, reducing the comprehensive line loss qualification rate of the area.

[0004] The current transformers are inconvenient to install. When the transformer is removed from the distribution box for installation, it will be exposed to the air and easily short-circuited and burned, posing a safety hazard. In addition, the existing transformers use insulating glue to bind the transformer columns, but when the current increases sharply, the insulating tape is easily melted. Furthermore, the mounting bracket is installed in a manner that the base and the pole are at 90 degrees, which makes wiring very inconvenient, easily causes cable twisting, and is unsightly and extremely inconvenient to use.

[0005] In view of this, we propose an external combined transformer. Summary of the invention

[0006] The object of the present invention is to provide an external combined transformer to solve the problems raised in the above background technology. To achieve the above object, the present invention provides the following technical solution: an external combined transformer, comprising a transformer body and a mounting bracket, a fixing plate fixed on the transformer body, a clamping ring welded on one side of the fixing plate, and a mounting bracket connected to the clamping ring.

[0007] Preferably, the transformer body includes a cast body, a mounting base plate, a copper busbar, a terminal block, an insulating cover and a secondary junction box, the mounting base plate is fixed to the bottom of the cast body, a plurality of copper busbars are fixed on the cast body, a terminal block is connected to the copper busbar, the copper busbar and the terminal block are covered with inherent insulating covers, a secondary junction box is fixed on the side of the cast body, and the secondary junction box is located below the copper busbar, and the mounting base plate is fixed to the fixed plate.

[0008] Preferably, the mounting bracket includes a first outer ring, a second outer ring, a first inner ring, a second inner ring and connecting ears, the first outer ring is connected to the clamping ring, the second outer ring is butt-jointed to the first outer ring, the first inner ring is fixed to the inner side of the first outer ring via a connecting plate, the second inner ring is fixed to the inner side of the second outer ring via a connecting plate, and connecting ears are welded to both ends of the first inner ring and the second inner ring.

[0009] Preferably, the first outer ring, the second outer ring, the first inner ring and the second inner ring are all semicircular, and two ends of the first inner ring are seamlessly connected to two ends of the second inner ring.

[0010] Preferably, the first outer ring is evenly provided with a plurality of threaded holes, the clamping ring is also provided with two threaded holes, and the clamping ring is fixed to the first outer ring via two first threaded rods.

[0011] Preferably, the secondary junction box is fixed to the mounting base plate by two sealing screws.

[0012] Preferably, rubber pads are adhered to the inner sides of the first outer ring and the second outer ring.

[0013] Preferably, the two connecting ears located on the same side are connected and fixed by a second threaded rod.

[0014] Preferably, the terminal block is fixed to the copper busbar via a third threaded rod.

[0015] Preferably, a groove opening downward is provided at the bottom of the casting body, a secondary wiring terminal is arranged in the groove, the secondary wiring terminal is connected to the lead-out cable, and silicone rubber for sealing the secondary terminal and the cable is cast in the groove.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] In the present invention, a groove with an opening downward is opened at the bottom of the casting body, and the secondary wiring terminal at the bottom of the casting body is located in the groove and connected to the lead-out cable. Silicone rubber for sealing the secondary terminal and the cable is poured in the groove. The wiring terminal is sealed in the groove at the bottom of the casting body, which can not only effectively prevent electricity theft, water and pollution, but also facilitate single unit disassembly and replacement, saving money. The combined structure is easy to install and has a small size.

[0018] In the present invention, an insulating cover is put on the copper busbar and the terminal board to wrap and protect the copper busbar and the terminal board. Since the insulating cover is low in price and beautiful, it can solve the economic problem and greatly improve the safety. It is easy to install and easy to find the fault of the mutual inductor, so it is extremely convenient to use.

[0019] In the present invention, an openable and closable mounting bracket is provided on the transformer body to fix the transformer body on the wire pole, so that the transformer body can be fixed in parallel with the wire pole, and the orientation of the transformer body can be quickly adjusted according to needs. The overall structure is simple, the operation is simple, the flexibility and adjustability are strong, the wiring is convenient, the cable is not easily twisted, and the aesthetics is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the transformer body in the present invention;

[0022] Figure 3 It is a schematic diagram of the structure of the transformer body in the present invention from a top view;

[0023] Figure 4 It is a schematic diagram of the structure of the disassembled mounting bracket of the present invention.

[0024] In the figure: 1. casting body; 2. mounting base plate; 3. copper busbar; 4. terminal block; 5. insulating cover; 6. first outer ring; 7. second outer ring; 8. connecting plate; 9. first inner ring; 10. second inner ring; 11. connecting ear; 12. clamping ring; 13. fixing plate; 14. threaded hole; 15. first threaded rod; 16. secondary junction box; 17. sealing screw; 18. rubber pad; 19. second threaded rod; 20. third threaded rod. DETAILED DESCRIPTION

[0025] 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 technical personnel in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figures 1 to 4 The present invention provides a technical solution: an external combined transformer, including a transformer body and a mounting bracket, a fixing plate 13 is fixed on the transformer body, a clamping ring 12 is welded on one side of the fixing plate 13, and the clamping ring 12 is connected to the mounting bracket.

[0027] In this embodiment, the transformer body includes a cast body 1, a mounting base plate 2, a copper busbar 3, a terminal block 4, an insulating cover 5 and a secondary junction box 16. The mounting base plate 2 is fixed to the bottom of the cast body 1, a plurality of copper busbars 3 are fixed on the cast body 1, the copper busbars 3 are connected to the terminal block 4, the copper busbars 3 and the terminal block 4 are covered with an inherent insulating cover 5, a secondary junction box 16 is fixed on the side of the cast body 1, and the secondary junction box 16 is located below the copper busbar 3, and the mounting base plate 2 is fixed to the fixed plate 13.

[0028] In this embodiment, the mounting bracket includes a first outer ring 6, a second outer ring 7, a first inner ring 9, a second inner ring 10 and a connecting ear 11. The first outer ring 6 is connected to the clamping ring 12, and the second outer ring 7 is butt-jointed with the first outer ring 6. The first inner ring 9 is fixed to the inner side of the first outer ring 6 via a connecting plate 8, and the second inner ring 10 is fixed to the inner side of the second outer ring 7 via a connecting plate 8, and connecting ears 11 are welded to both ends of the first inner ring 9 and the second inner ring 10.

[0029] In this embodiment, the first outer ring 6 , the second outer ring 7 , the first inner ring 9 and the second inner ring 10 are all semicircular, and both ends of the first inner ring 9 are seamlessly connected to both ends of the second inner ring 10 .

[0030] In this embodiment, a plurality of threaded holes 14 are evenly formed on the first outer ring 6 , and the clamping ring 12 also has two threaded holes 14 . The clamping ring 12 is fixed to the first outer ring 6 via two first threaded rods 15 .

[0031] In this embodiment, the secondary junction box 16 is fixed to the mounting base plate 2 by two sealing screws 17 .

[0032] In this embodiment, rubber pads 18 are adhered to the inner sides of the first outer ring 6 and the second outer ring 7 .

[0033] In this embodiment, the two connecting ears 11 on the same side are connected and fixed by a second threaded rod 19 .

[0034] In this embodiment, the wiring board 4 is fixed on the copper busbar 3 through the third threaded rod 20 .

[0035] In this embodiment, a groove opening downward is provided at the bottom of the casting body 1, and a secondary terminal is arranged in the groove. The secondary terminal is connected to the lead-out cable, and silicone rubber for sealing the secondary terminal and the cable is cast in the groove.

[0036] The invention and advantages: When installing the external combined mutual inductor, the operation steps are as follows:

[0037] Step 1: Clamp the first inner ring 9 and the second inner ring 10 on both sides of the wire rod, then pass the second threaded rod 19 on the connecting ear 11 without tightening it, and then fix the clamping ring 12 on the first outer ring 6 through the first threaded rod 15 to complete the pre-fixation.

[0038] Step 2, adjust the direction of the transformer body according to the wiring position. At this time, the second outer ring 7 can be rotated to rotate the first inner ring 9 and the second inner ring 10 on the outside of the wire rod, so as to adjust the direction of the transformer body. After determining the direction, tighten the second threaded rod 19 that fixes the connecting ear 11, and use the first inner ring 9 and the second inner ring 10 to clamp it on the wire rod for fixation. At the same time, the rubber pad 18 on the inner side of the first inner ring 9 and the second inner ring 10 can increase the tightness, which helps to firmly fix and prevent sliding. After fixing the mounting bracket, the clamping ring 12 can also be removed to adjust the installation position of the transformer body again. The overall structure is simple, the operation is simple, it has strong flexibility and adjustability, the wiring is convenient, it is not easy to cause cable distortion, and the aesthetics is greatly improved.

[0039] Step three: When wiring, first connect one end of the cable to the terminal board 4, then use the third threaded rod 20 to fix the terminal board 4 on the copper bus 3, and then put the insulating cover 5 on the copper bus 3 and the terminal board 4, so as to seal and wrap the copper bus 3 and the terminal board 4. Since the insulating cover 5 is inexpensive, generous and beautiful, it can solve the economic problem, and at the same time it can greatly improve the safety, and it is easy to install, and it is easy to find the fault of the mutual inductor, which is extremely convenient to use. Since a groove with an opening downward is opened at the bottom of the casting body 1, the secondary terminal at the bottom of the casting body 1 is located in the groove and connected to the lead-out cable. Silicone rubber for sealing the secondary terminal and the cable is poured in the groove. The terminal is sealed in the groove at the bottom of the casting body 1, which can not only effectively prevent electricity theft, waterproof and pollution, but also facilitate the disassembly and replacement of a single unit, saving money. The combined structure is easy to install and has a small size.

[0040] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0041] In the description of the present invention, unless otherwise specified, "multiple" means two or more than two; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. An external combined transformer, comprising a transformer body and a mounting bracket, characterized in that: A fixing plate (13) is fixed on the transformer body, a clamping ring (12) is welded to one side of the fixing plate (13), and a mounting bracket is connected to the clamping ring (12); The mounting bracket comprises a first outer ring (6), a second outer ring (7), a first inner ring (9), a second inner ring (10) and a connecting ear (11); the first outer ring (6) is connected to the clamping ring (12); the second outer ring (7) is butt-jointed to the first outer ring (6); the first inner ring (9) is fixed to the inner side of the first outer ring (6) via a connecting plate (8); the second inner ring (10) is fixed to the inner side of the second outer ring (7) via a connecting plate (8); both ends of the first inner ring (9) and the second inner ring (10) are welded with connecting ears (11); the first outer ring (6), the second outer ring (7) 7), the first inner ring (9) and the second inner ring (10) are both semicircular, and the two ends of the first inner ring (9) are seamlessly connected to the two ends of the second inner ring (10), the inner sides of the first outer ring (6) and the second outer ring (7) are both adhered with rubber pads (18), the first outer ring (6) is evenly provided with a plurality of threaded holes (14), the clamping ring (12) is also provided with two threaded holes (14), and the clamping ring (12) is fixed to the first outer ring (6) by two first threaded rods (15), and the two connecting ears (11) located on the same side are connected and fixed by a second threaded rod (19); The steps for installing the external combined transformer are as follows: Step 1: clamp the first inner ring (9) and the second inner ring (10) on both sides of the wire rod, then pass the second threaded rod (19) through the connecting ear (11) without tightening, and then fix the clamping ring (12) on the first outer ring (6) through the first threaded rod (15), thereby completing the pre-fixation; Step 2, adjusting the orientation of the transformer body according to the wiring position, at this time rotating the second outer ring (7), and rotating the first inner ring (9) and the second inner ring (10) on the outside of the line rod, so as to adjust the orientation of the transformer body, after determining the orientation, tightening the second threaded rod (19) fixing the connecting ear (11), and clamping the first inner ring (9) and the second inner ring (10) on the line rod for fixing, while the rubber pad (18) on the inner side of the first inner ring (9) and the second inner ring (10) increases the tightness, helps to firmly fix and prevent sliding, after fixing the mounting bracket, remove the clamping ring (12), and adjust the mounting position of the transformer body again; Step 3: When wiring, first connect one end of the cable to the wiring board (4), then use the third threaded rod (20) to fix the wiring board (4) to the copper busbar (3), and then put the insulating cover (5) on the copper busbar (3) and the wiring board (4), so as to seal and wrap the copper busbar (3) and the wiring board (4); the bottom of the casting body (1) is provided with a groove opening downward, and the secondary wiring terminal at the bottom of the casting body (1) is located in the groove and connected to the lead-out cable. Silicon rubber for sealing the secondary terminal and the cable is cast in the groove, and the wiring terminal is sealed in the groove at the bottom of the casting body (1).

2. The external combined mutual inductor according to claim 1, characterized in that: The transformer body comprises a casting body (1), a mounting base plate (2), a copper busbar (3), a terminal block (4), an insulating cover (5) and a secondary junction box (16); the mounting base plate (2) is fixed to the bottom of the casting body (1); a plurality of copper busbars (3) are fixed to the casting body (1); the terminal block (4) is connected to the copper busbars (3); the copper busbars (3) and the terminal block (4) are covered with an inherent insulating cover (5); a secondary junction box (16) is fixed to the side of the casting body (1), and the secondary junction box (16) is located below the copper busbars (3); and the mounting base plate (2) is fixed to the fixing plate (13).

3. The external combined mutual inductor according to claim 2, characterized in that: The secondary junction box (16) is fixed to the mounting base plate (2) via two sealing screws (17).

4. The external combined mutual inductor according to claim 2, characterized in that: The wiring board (4) is fixed to the copper busbar (3) via a third threaded rod (20).

5. The external combined transformer according to claim 2, characterized in that: The bottom of the casting body (1) is provided with a groove opening downwards, a secondary wiring terminal is arranged in the groove, the secondary wiring terminal is connected to the lead-out cable, and silicone rubber for sealing the secondary terminal and the cable is cast in the groove.

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