Current transformer convenient for fixing conductor

Abstract

The utility model discloses a current transformer convenient for fixing a conductor, which comprises a bottom mounting plate, the top end of the bottom mounting plate is fixedly connected with a bearing shell, the two sides of the front end of the bearing shell are respectively provided with a wiring terminal, an iron core is arranged above the bearing shell, the bottom end of the iron core is wound with a secondary side winding, and the bottom end of the secondary side winding is wound with a secondary side winding. The middle position of the resin insulation cover shell is provided with a limiting assembly which is convenient for fixing the conductor. According to the current transformer convenient for fixing the conductor, through the arrangement of the front limiting ring, the fixing cylinder, the rubber ridge plate and the rear limiting ring, when the current transformer is used and a conductor wire is inserted, the rubber ridge plate in the fixing cylinder can isolate and fix a corresponding wire turn every time the conductor wire is wound for one turn, so that overlapping is prevented, and later inspection and interpretation are facilitated; the front limiting ring and the rear limiting ring facilitate installation and detachment of the fixing cylinder, the function of facilitating conductor fixing and preventing overlapping is achieved, and the problem that the device does not have the function of facilitating conductor fixing and preventing overlapping is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical instruments, in particular to a current transformer which is convenient for fixing a conductor. Background Art

[0002] A current transformer is an instrument that converts a large primary current into a small secondary current for measurement based on the principle of electromagnetic induction. It is mainly used to expand the range of an ammeter, allowing the use of an ammeter with a small range to measure a large current.

[0003] Currently, most common current transformers on the market are similar in structure. Their main bodies are composed of a closed iron core and a secondary winding, covered with a resin insulating cover on the outside, and have a metal mounting plate on the bottom. In actual use, they have some functional deficiencies and have room for improvement. For example, during the measurement process, the conductor wire to be measured needs to pass through the center of the current transformer. The wire is in a loose state. When the number of turns is large, the wire is prone to overlap, which is prone to errors when checking and judging the number of turns. It does not have the function of facilitating the fixing of conductors to prevent overlapping.

[0004] Now, a new type of current transformer which is convenient for fixing conductors is proposed to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a current transformer which is convenient for fixing conductors, so as to solve the problem that the above-mentioned background technology does not have the function of conveniently fixing conductors and preventing overlapping.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a current transformer that is convenient for fixing a conductor, comprising a bottom mounting plate, the top of the bottom mounting plate is fixedly connected to a supporting shell, both sides of the front end of the supporting shell are respectively installed with terminal blocks, an iron core is arranged above the supporting shell, the bottom end of the iron core is wound with a secondary winding, the outside of the iron core is covered with a resin insulating cover, both sides of the top of the bottom mounting plate are respectively provided with mounting screw eyes, and a limit assembly that is convenient for fixing the conductor is arranged at the middle position of the resin insulating cover.

[0007] The limiting assembly includes a fixing tube, which is inserted into the interior of the middle position of the resin insulating cover from front to back, the front end of the fixing tube is fixedly connected with a front limiting ring, a plurality of groups of rubber ridges are arranged on the inner wall of the fixing tube, and the rear end of the outside of the fixing tube is threadedly connected with a rear limiting ring.

[0008] Preferably, the outer diameter of the fixing tube is matched with the inner diameter of the resin insulating shell, and the fixing tube can be displaced forward and backward along the inside of the resin insulating shell.

[0009] Preferably, the rubber edge plates are elastic and are arranged at equal intervals.

[0010] Preferably, the rear end of the front limiting ring fits with the front end of the resin insulating shell, and the front end of the rear limiting ring fits with the rear end of the resin insulating shell.

[0011] Preferably, a concave cover is sleeved on the front of the supporting shell, the top of the concave cover is fixedly connected to an upper protective plate, the rear end of the upper protective plate is provided with two groups of wire grooves, the two sides of the concave cover are respectively fixedly connected to internal threaded pipe seats, and hand-tightened bolts are inserted inside the internal threaded pipe seats.

[0012] Preferably, positioning screw eyes are respectively provided inside both sides of the supporting shell, the top of the upper protective plate is flush with the top of the concave cover, and the positions of the wire slot and the terminal block correspond to each other.

[0013] Preferably, two sides of the outside of the bottom mounting plate are respectively sleeved with square casings, the bottom end of the square casing is evenly coated with a self-adhesive sticker, and the bottom of the self-adhesive sticker is applied with release paper.

[0014] Preferably, reserved screw grooves are respectively provided at the upper and lower ends of the square casing, and the position dimensions of the reserved screw grooves and the mounting screw eyes correspond one to one.

[0015] Compared with the prior art, the utility model has the beneficial effects that: the current transformer for fixing conductors not only realizes the function of fixing conductors to prevent overlapping, but also realizes the function of fixing the wiring at the terminals, and also realizes the function of facilitating installation and fixing;

[0016] (1) By providing a front limiting ring, a fixing tube, a rubber rib plate and a rear limiting ring, when in use, the ammeter is connected to the terminal block, and the conductor of the current to be measured passes through the empty slot in the center of the resin insulating cover. The large current on the primary side of the conductor wire to be measured is converted into a small current on the secondary side, and is transmitted to the ammeter via the secondary winding and the terminal block. The ammeter displays the reading. When inserting the conductor wire, the rubber rib plate in the fixing tube isolates and fixes the corresponding wire turns for each turn to prevent them from overlapping, which is convenient for later inspection and interpretation. The front limiting ring and the rear limiting ring facilitate the installation and disassembly of the fixing tube, and realize the function of fixing the conductor to prevent overlapping.

[0017] (2) By providing a concave cover, an upper protective plate, a wire groove, an internally threaded pipe seat, a hand-tightening bolt and a positioning screw eye, when in use, as the wiring of the ammeter is connected to the wiring terminal, the concave cover is buckled in front of the supporting shell, the upper protective plate blocks the wiring terminal, and the wire groove on the upper protective plate clamps the wiring, so that the position of the wiring is fixed and not easy to move and fall off, and then tighten the hand-tightening bolt, the hand-tightening bolt is screwed into the positioning screw eye along the internally threaded pipe seat, and the position of the concave cover is fixed, thereby realizing the function of fixing the wiring at the terminal;

[0018] (3) By providing a square housing, self-adhesive sticker, release paper and reserved screw groove, when using, when installing the current transformer, first put two sets of square housings on both sides of the bottom mounting plate respectively, align the reserved screw groove and the mounting screw eye, then peel off the release paper to expose the self-adhesive sticker, press the surface where the self-adhesive sticker is located on the installation position, and the position of the current transformer is initially fixed. At this time, you can free your hands to screw in the screws without supporting the current transformer, which makes the operation simpler and realizes the function of easy installation and fixation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of a partial cross-sectional structure of the utility model in a front view;

[0020] Figure 2 It is a schematic diagram of a partial cross-sectional structure of a position limiting component of the utility model from a side view;

[0021] Figure 3 It is a schematic diagram of the side structure of the resin insulation cover of the utility model;

[0022] Figure 4 This is a schematic diagram of the top view of the concave cover of the utility model;

[0023] Figure 5 It is a bottom view structural schematic diagram of the bottom mounting plate of the utility model.

[0024] In the figure: 1. bottom mounting plate; 2. supporting shell; 3. wiring terminal; 4. core; 5. secondary winding; 6. resin insulating cover; 7. front limit ring; 8. fixing cylinder; 9. rubber edge plate; 10. rear limit ring; 11. concave cover; 12. upper protective plate; 13. wire groove; 14. internal threaded pipe socket; 15. hand-tightening bolt; 16. positioning screw eye; 17. square shell; 18. self-adhesive sticker; 19. release paper; 20. reserved screw groove; 21. installation screw eye. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Example 1: Please refer to Figure 1-5 A current transformer for fixing a conductor, comprising a bottom mounting plate 1, a supporting shell 2 is fixedly connected to the top of the bottom mounting plate 1, terminals 3 are respectively installed on both sides of the front end of the supporting shell 2, an iron core 4 is arranged above the supporting shell 2, a secondary winding 5 is wound around the bottom end of the iron core 4, a resin insulating cover 6 is coated on the outside of the iron core 4, mounting screw eyes 21 are respectively arranged on both sides of the top of the bottom mounting plate 1, and a limit assembly for fixing the conductor is arranged at the middle position of the resin insulating cover 6;

[0027] See also Figure 1-5 A current transformer for fixing a conductor also includes a limit assembly, which includes a fixing cylinder 8, which is inserted into the middle of a resin insulating housing 6 from front to back, a front limit ring 7 is fixedly connected to the front end of the fixing cylinder 8, a plurality of rubber ridge plates 9 are arranged on the inner wall of the fixing cylinder 8, and a rear limit ring 10 is threadedly connected to the rear end of the fixing cylinder 8;

[0028] The outer diameter of the fixing tube 8 is matched with the inner diameter of the resin insulating cover 6, and the fixing tube 8 can be displaced forward and backward along the inside of the resin insulating cover 6. The rubber edge plates 9 are elastic and arranged at equal intervals. The rear end of the front limit ring 7 fits with the front end of the resin insulating cover 6, and the front end of the rear limit ring 10 fits with the rear end of the resin insulating cover 6, which can fix the conductor wire to prevent overlap during winding.

[0029] Specifically, Figure 1 and Figure 2 As shown, when inserting the conductor wire, each time a turn is wound, the rubber edge plate 9 in the fixed tube 8 will isolate and fix the corresponding wire turn to prevent it from overlapping, which is convenient for later inspection and interpretation. The front limit ring 7 and the rear limit ring 10 facilitate the installation and disassembly of the fixed tube 8.

[0030] Embodiment 2: A concave cover 11 is sleeved on the front of the supporting shell 2, an upper protective plate 12 is fixedly connected to the top of the concave cover 11, two sets of wire grooves 13 are arranged at the rear end of the upper protective plate 12, internal threaded tube seats 14 are fixedly connected to the two sides of the concave cover 11, hand-tightened bolts 15 are inserted into the internal threaded tube seats 14, and positioning screw eyes 16 are arranged inside the two sides of the supporting shell 2, the top of the upper protective plate 12 is flush with the top of the concave cover 11, and the positions of the wire grooves 13 and the wiring terminals 3 correspond to each other, which can fix the wiring of the ammeter and reduce the probability of falling off;

[0031] Specifically, Figure 1 , Figure 3 and Figure 4 As shown, the concave cover 11 is buckled in front of the supporting shell 2, the upper protective plate 12 is blocked above the wiring terminal 3, and the wire groove 13 on the upper protective plate 12 clamps the wiring, so that the position of the wiring is fixed and not easily displaced and fall off, and then the hand screw bolt 15 is tightened, and the hand screw bolt 15 is screwed into the positioning screw eye 16 along the internal threaded pipe seat 14, and the position of the concave cover 11 is fixed.

[0032] Embodiment 3: A square casing 17 is sleeved on both sides of the outside of the bottom mounting plate 1, the bottom of the square casing 17 is evenly coated with a self-adhesive sticker 18, and a release paper 19 is applied to the bottom of the self-adhesive sticker 18. The upper and lower ends of the square casing 17 are respectively provided with reserved screw grooves 20, and the positions and sizes of the reserved screw grooves 20 and the mounting screw eyes 21 correspond to each other, which makes the installation more convenient and quick;

[0033] Specifically, Figure 1 and Figure 5 As shown, two sets of square shells 17 are respectively put on both sides of the bottom mounting plate 1, so that the reserved screw groove 20 and the mounting screw eye 21 are aligned, and then the release paper 19 is peeled off to expose the adhesive 18, and the surface where the adhesive 18 is located is pressed on the installation position. The position of the current transformer is initially fixed, and the hands can be used to screw in the screws without supporting the current transformer, which is easier to operate.

[0034] Working principle: When the utility model is used, first, the ammeter is connected to the terminal 3, and the conductor of the current to be measured passes through the empty slot in the center of the resin insulating cover 6. The large current on the primary side of the conductor wire to be measured is converted into a small current on the secondary side, and is transmitted to the ammeter through the secondary winding 5 and the terminal 3. The ammeter displays the reading. When inserting the conductor wire, the rubber edge plate 9 in the fixed tube 8 will isolate and fix the corresponding wire turns for each turn to prevent them from overlapping, which is convenient for later inspection and interpretation. The front limit ring 7 and the rear limit ring 10 facilitate the installation and disassembly of the fixed tube 8. As the wiring of the ammeter is docked with the terminal 3, the concave cover 11 is buckled in front of the supporting shell 2, and the upper protective plate 12 blocks the upper part of the terminal 3. The wire groove 13 on the upper protective plate 12 clamps the wiring, so that the position of the wiring is fixed and not easy to move and fall off. Then tighten the hand screw bolt 15, and the hand screw bolt 15 is screwed into the positioning screw eye 16 along the internal threaded pipe seat 14, and the position of the concave cover 11 is fixed. When installing the current transformer, first put two sets of square shells 17 on both sides of the bottom mounting plate 1 respectively, align the reserved screw groove 20 and the mounting screw eye 21, then peel off the release paper 19 to expose the adhesive 18, press the surface where the adhesive 18 is located on the installation position, and the position of the current transformer is preliminarily fixed. At this time, you can free your hands to screw in the screws without supporting the current transformer, which is easier to operate.

[0035] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A current transformer for facilitating fixing of a conductor, comprising a bottom mounting plate (1), characterized in that: The top of the bottom mounting plate (1) is fixedly connected to a supporting shell (2), and wiring terminals (3) are respectively installed on both sides of the front end of the supporting shell (2), an iron core (4) is arranged above the supporting shell (2), a secondary winding (5) is wound around the bottom end of the iron core (4), and the outside of the iron core (4) is covered with a resin insulating cover (6), and mounting screw eyes (21) are respectively arranged on both sides of the top of the bottom mounting plate (1), and a limit assembly for fixing the conductor is arranged at the middle position of the resin insulating cover (6); The limiting assembly comprises a fixing tube (8), the fixing tube (8) being inserted into the interior of the middle position of the resin insulating cover (6) from front to back, the front end of the fixing tube (8) being fixedly connected to a front limiting ring (7), a plurality of groups of rubber ridges (9) being arranged on the inner wall of the fixing tube (8), and the rear end of the outside of the fixing tube (8) being threadedly connected to a rear limiting ring (10).

2. A current transformer for fixing a conductor according to claim 1, characterized in that: The outer diameter of the fixing tube (8) is matched to the inner diameter of the resin insulating shell (6), and the fixing tube (8) can be displaced forward and backward along the inside of the resin insulating shell (6).

3. A current transformer for fixing a conductor according to claim 1, characterized in that: The rubber ridges (9) are elastic and are arranged at equal intervals.

4. A current transformer for fixing a conductor according to claim 1, characterized in that: The rear end of the front limiting ring (7) fits with the front end of the resin insulating cover (6), and the front end of the rear limiting ring (10) fits with the rear end of the resin insulating cover (6).

5. A current transformer for fixing a conductor according to claim 1, characterized in that: A concave cover (11) is sleeved on the front of the supporting shell (2); an upper protective plate (12) is fixedly connected to the top of the concave cover (11); two groups of wire grooves (13) are provided at the rear end of the upper protective plate (12); internal threaded pipe seats (14) are fixedly connected to the two sides of the concave cover (11); and hand-tightened bolts (15) are inserted into the interior of the internal threaded pipe seats (14).

6. A current transformer for fixing conductors according to claim 5, characterized in that: Positioning screw eyes (16) are respectively arranged inside the two sides of the supporting shell (2), the top of the upper protective plate (12) is flush with the top of the concave cover (11), and the positions of the wire slot (13) and the connecting terminal (3) correspond to each other.

7. A current transformer for facilitating fixing of conductors according to claim 1, characterized in that: A square casing (17) is respectively sleeved on both sides of the outside of the bottom mounting plate (1), the bottom end of the square casing (17) is evenly coated with a self-adhesive sticker (18), and the bottom of the self-adhesive sticker (18) is pasted with a release paper (19).

8. A current transformer for fixing conductors according to claim 7, characterized in that: The upper and lower ends of the square casing (17) are respectively provided with reserved screw grooves (20), and the positions and sizes of the reserved screw grooves (20) and the mounting screw eyes (21) correspond to each other.

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