Cable type current transformer
By designing the upper and lower half-ring current transformer units of the cable-type current transformer, and combining them with a hinge and plastic snap-fit structure, the problems of rapid opening and closing and ease of production of miniature openable current transformers are solved, enabling rapid installation and safe current measurement.
Patent Information
- Application Number
- CN202422993689.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-05
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-12-05
AI Technical Summary
Existing miniature switchable current transformers have shortcomings in terms of rapid opening and closing, ease of production and assembly, especially the inconvenience of installing the core in the frame, making mass production difficult.
Design a cable-type current transformer that uses upper and lower half-ring current transformer units. It achieves quick opening and closing through a hinge and plastic snap-fit structure. The core and frame are installed using a snap-fit method to ensure quick installation and safety.
It enables rapid opening and closing and convenient installation of current transformers, improves production efficiency, and ensures safety and the possibility of mass production.
Smart Images
Figure CN223552386U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of current transformer technology, and in particular to a cable-type current transformer. Background Technology
[0002] A current transformer consists of a closed iron core and a coil (induction coil), with the coil wound around the iron core. It is an instrument that uses the principle of electromagnetic induction to convert a large primary current into a small secondary current to achieve current measurement.
[0003] There are many types of current transformers, typically including enclosed current transformers and switchable current transformers. Switchable current transformers can measure current without disconnecting the circuit being measured, making them convenient and widely used. Miniature switchable current transformers are mainly used in applications where space is limited.
[0004] However, the existing miniature switchable current transformers have the following problems: 1) Whether they can be opened and closed quickly. Most of them on the market use screw fixing and other structures; closing is troublesome, and opening is also troublesome.
[0005] 2) It is inconvenient during production and inconvenient to install the iron core in the frame;
[0006] 3) Inconvenient to assemble during production, making mass production impossible. Utility Model Content
[0007] The purpose of this invention is to overcome the defects in the existing technology and provide a cable-type current transformer.
[0008] To achieve the above objectives, the technical solution of this utility model is to design a cable-type current transformer, including an upper half-ring current transformer unit and a lower half-ring current transformer unit. The upper half-ring current transformer unit includes an upper half-ring current transformer housing, on which an upper half-ring mounting groove is provided. An upper half-ring iron core is disposed within the upper half-ring mounting groove. An upper half-ring cap is provided on the upper half-ring current transformer housing, and the upper half-ring cap fixes the upper half-ring iron core to the upper half-ring mounting groove. The lower half-ring current transformer unit includes a lower half-ring current transformer housing, on which a lower half-ring mounting groove is provided. The groove contains a lower half-ring assembly, which consists of a lower half-ring core, a frame, and a coil wound on the frame. The lower half-ring inductor housing has a snap-fit lower half-ring cover that secures the lower half-ring assembly within the lower half-ring mounting groove. The upper half-ring inductor housing is rectangular, and one connecting end has a slot. The slot includes a slot body extending outward from the connecting end, and the slot body has a rectangular through hole forming the slot. The other connecting end of the upper half-ring inductor housing has an upper hinge seat, which is positioned along the edge of the connecting end.
[0009] The lower half-ring mutual inductor housing is rectangular. One connecting end of the lower half-ring mutual inductor housing is provided with a stepped buckle, and the other connecting end of the lower half-ring mutual inductor housing is provided with a pair of lower hinge seats. The pair of lower hinge seats are arranged along the edge of the connecting end. One corresponding end of the upper half-ring mutual inductor housing and the lower half-ring mutual inductor housing are hinged by a hinge shaft passing through the upper hinge seat and the lower hinge seat. The other corresponding end of the upper half-ring mutual inductor housing and the lower half-ring mutual inductor housing are connected by a stepped buckle and a buckle groove.
[0010] A further preferred technical solution is that the upper half-ring core includes an outer ring surface, an inner ring surface, and a pair of side surfaces, and the upper half-ring mounting groove matches the outer ring surface and the pair of side surfaces of the upper half-ring core.
[0011] A further preferred technical solution includes a pair of upper slots on the outer sides of the upper half-ring mounting grooves that are close to a pair of sides of the upper half-ring core; an upper half-ring cover having a mounting groove that matches the upper half-ring core; the mounting groove matching the inner ring surface and a pair of sides of the upper half-ring core; and a pair of upper buckles on the outer sides of the upper half-ring cover that are close to a pair of sides of the upper half-ring core; the upper half-ring cover and the upper half-ring mutual inductance housing being connected by matching upper buckles and upper slot buckles.
[0012] A further preferred technical solution is that the lower half-ring core also includes an outer ring surface, an inner ring surface, and a pair of side surfaces, and the skeleton includes an inner skeleton that mates with the inner ring surface of the lower half-ring core and an outer skeleton that mates with the outer ring surface.
[0013] A further preferred technical solution includes an inner frame comprising a horizontal plate, on which a pair of vertically arranged upright plates are provided. Each upright plate has a pair of vertically arranged wing plates on its outer side. Each pair of wing plates has an inner buckle on its far side near the horizontal plate. The outer frame comprises a U-shaped plate, on which a pair of outwardly extending and parallel-to-the-side slots are provided on both side plates. The bottom plate of the U-shaped plate has a pair of cross-shaped and outwardly extending frame plates. The outer frame is buckled to the inner frame. After the outer frame is buckled to the inner frame, a coil is wound around it to form the lower half-circle assembly.
[0014] A further preferred technical solution is that the lower semi-annular mounting groove has mounting posts at its four corners arranged along the opening direction, the mounting posts have cylindrical locking holes arranged along the opening direction, the lower semi-annular cover has protrusions at its four corners, and the side of the protrusion that mates with the lower semi-annular mutual inductance housing has a vertically arranged cylindrical buckle, and the lower semi-annular cover is buckled to the lower semi-annular mutual inductance housing.
[0015] The advantages and beneficial effects of this utility model are as follows: 1) It adopts a hinge on one side and a plastic buckle on the other side, which ensures convenient opening and closing, and at the same time, due to the characteristics of plastic, safety is guaranteed. The buckle adopts a stepped design to ensure that it can be pressed down in layers.
[0016] 2) The installation of the iron core, whether it is the top cover or the frame, adopts a clever snap-fit method for quick installation and production.
[0017] 3) The hinge rivets are made of one-piece high-strength plastic, which is both easy to install and safe. Attached Figure Description
[0018] Figure 1 This is a closed perspective view of the present invention;
[0019] Figure 2 This is an open perspective view of the present invention;
[0020] Figure 3 This is one of the exploded isometric views of this utility model;
[0021] Figure 4 This is the second exploded isometric drawing of this utility model;
[0022] Figure 5 This is the third exploded isometric drawing of this utility model;
[0023] Figure 6 This is an isometric view of the upper half-ring mutual inductance shell of this utility model.
[0024] In the diagram: 10. Upper half-ring mutual inductor housing; 11. Slot; 12. Upper hinge seat; 13. Upper half-ring mounting groove; 14. Upper slot; 20. Lower half-ring mutual inductor housing; 21. Stepped buckle; 22. Lower hinge seat; 23. Mounting column; 24. Lower half-ring mounting groove; 30. Hinge shaft; 40. Upper half-ring core; 50. Upper half-ring cover; 51. Upper buckle; 60. Lower half-ring cover; 61. Cylindrical buckle; 70. Inner frame; 71. Inner buckle; 80. Lower half-ring core; 90. Outer frame; 91. Outer slot. Detailed Implementation
[0025] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.
[0026] like Figures 1 to 6As shown, the cable-type current transformer includes an upper half-ring current transformer unit and a lower half-ring current transformer unit. The upper half-ring current transformer unit includes an upper half-ring current transformer housing 10. The upper half-ring current transformer housing 10 is provided with an upper half-ring mounting groove 13. An upper half-ring iron core 40 is provided in the upper half-ring mounting groove 13. The upper half-ring current transformer housing 10 is provided with a snap-fit upper half-ring cover 50. The upper half-ring cover 50 fixes the upper half-ring iron core 40 in the upper half-ring mounting groove 13. 3. The lower half-ring mutual inductance unit includes a lower half-ring mutual inductance housing 20. The lower half-ring mutual inductance housing 20 is provided with a lower half-ring mounting groove 24. A lower half-ring assembly is provided in the lower half-ring mounting groove 24. The lower half-ring assembly consists of a lower half-ring iron core 80, a frame, and a coil wound on the frame. A snap-fit lower half-ring cover 60 is provided on the lower half-ring mutual inductance housing 20. The lower half-ring cover 60 fixes the lower half-ring assembly in the lower half-ring mounting groove 24.
[0027] Specifically, the upper half-ring mutual inductor housing 10 is rectangular, and one connecting end of the upper half-ring mutual inductor housing 10 is provided with a slot 11. The slot 11 includes a slot body extending outward from the connecting end, and the slot body is provided with a rectangular through hole to form the slot 11. The other connecting end of the upper half-ring mutual inductor housing 10 is provided with an upper hinge seat 12, and the upper hinge seat 12 is provided along the edge of the connecting end.
[0028] The upper half-ring core 40 includes an outer ring surface, an inner ring surface, and a pair of side surfaces. The upper half-ring mounting groove 13 matches the adjacent outer ring surface and the pair of side surfaces of the upper half-ring core 40, allowing the upper half-ring core 40 to be installed within the upper half-ring mounting groove 13. A pair of upper retaining grooves 14 are respectively provided on the outer side surfaces of the upper half-ring mounting groove 13 adjacent to the pair of side surfaces of the upper half-ring core 40. The upper half-ring cover 50 has a mounting groove that matches the upper half-ring core 40. The mounting groove matches the inner ring surface and a pair of side surfaces of the adjacent upper half-ring core 40. The outer side surfaces of the upper half-ring cover 50, which are adjacent to a pair of side surfaces of the upper half-ring core 40, are respectively provided with a pair of upper buckles 51. The upper half-ring cover 50 and the upper half-ring mutual inductance housing 10 are connected by matching upper buckles 51 and upper slots 14, so that the upper half-ring core 40 is installed in the upper half-ring mounting groove 13 and the two ends of the upper half-ring core 40 are exposed.
[0029] The lower half-ring mutual inductor housing 20 is rectangular. One connecting end of the lower half-ring mutual inductor housing 20 is provided with a stepped buckle 21, and the other connecting end of the lower half-ring mutual inductor housing 20 is provided with a pair of lower hinge seats 22. The pair of lower hinge seats 22 are arranged along the edge of the connecting end. One corresponding end of the upper half-ring mutual inductor housing 10 and the lower half-ring mutual inductor housing 20 is hinged by a hinge shaft 30 passing through the upper hinge seat 12 and the lower hinge seat 22. The other corresponding end of the upper half-ring mutual inductor housing 10 and the lower half-ring mutual inductor housing 20 is connected to the slot 11 by the stepped buckle 21.
[0030] The lower half-ring core 80 also includes an outer ring surface, an inner ring surface, and a pair of side surfaces. The frame includes an inner frame 70 that mates with the inner ring surface of the lower half-ring core 80 and an outer frame 90 that mates with the outer ring surface. The inner frame 70 includes a horizontal plate, on which a pair of vertically arranged upright plates are provided. Each upright plate has a pair of vertically arranged wing plates on its outer side surface. Each pair of wing plates has an inner buckle 71 near the horizontal plate on its far side surface. The outer frame 90 includes a U-shaped plate, on which the two side plates of the U-shaped plate are provided with... A pair of outwardly extending slots 91 are provided on the bottom plate of the U-shaped plate. A pair of cross-shaped and outwardly extending skeleton plates are provided on the bottom plate. The outer skeleton 90 is snapped to the inner skeleton 70. After the outer skeleton 90 and the inner skeleton 70 are snapped to each other, a coil is wound to form the lower half-circle assembly. The lower half-ring mutual inductance housing 20 is provided with a lower half-ring mounting groove 24 that matches the outer ring surface and a pair of side surfaces of the lower half-circle assembly, so that the lower half-circle assembly can be installed in the lower half-ring mounting groove 24.
[0031] The lower semi-annular mounting groove 24 has mounting posts 23 at its four corners, which are arranged along the opening direction. The mounting posts 23 have cylindrical locking holes arranged along the opening direction. The lower semi-annular cover 60 has protrusions at its four corners. The side of the protrusion that mates with the lower semi-annular inductor housing 10 has a vertically arranged cylindrical buckle 61. The lower semi-annular cover 60 is buckled to the lower semi-annular inductor housing 20, and the lower semi-ring assembly is installed in the lower semi-annular mounting groove 24, leaving both ends of the lower semi-annular iron core 80 exposed.
[0032] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.
Claims
1. A cable-type current transformer, comprising an upper half-ring current transformer unit and a lower half-ring current transformer unit, wherein the upper half-ring current transformer unit includes an upper half-ring current transformer housing, the upper half-ring current transformer housing is provided with an upper half-ring mounting groove, an upper half-ring iron core is provided in the upper half-ring mounting groove, and a snap-fit upper half-ring cover is provided on the upper half-ring current transformer housing, the upper half-ring cover fixing the upper half-ring iron core in the upper half-ring mounting groove; the lower half-ring current transformer unit includes a lower half-ring current transformer housing, the lower half-ring current transformer housing is provided with a lower half-ring mounting groove, a lower half-ring winding assembly is provided in the lower half-ring mounting groove, the lower half-ring winding assembly is composed of a lower half-ring iron core, a frame, and a coil wound on the frame, and a snap-fit lower half-ring cover is provided on the lower half-ring current transformer housing, the lower half-ring cover fixing the lower half-ring winding assembly in the lower half-ring mounting groove, characterized in that: The upper half-ring mutual inductor housing is rectangular. One connecting end of the upper half-ring mutual inductor housing is provided with a slot. The slot includes a slot body extending outward from the connecting end. The slot body is provided with a rectangular through hole to form the slot. The other connecting end of the upper half-ring mutual inductor housing is provided with an upper hinge seat. The upper hinge seat is provided along the edge of the connecting end. The lower half-ring mutual inductor housing is rectangular. One connecting end of the lower half-ring mutual inductor housing is provided with a stepped buckle, and the other connecting end of the lower half-ring mutual inductor housing is provided with a pair of lower hinge seats. The pair of lower hinge seats are arranged along the edge of the connecting end. One corresponding end of the upper half-ring mutual inductor housing and the lower half-ring mutual inductor housing are hinged by a hinge shaft passing through the upper hinge seat and the lower hinge seat. The other corresponding end of the upper half-ring mutual inductor housing and the lower half-ring mutual inductor housing are connected by a stepped buckle and a buckle groove.
2. The cable-type current transformer according to claim 1, characterized in that: The upper half-ring core includes an outer ring surface, an inner ring surface, and a pair of side surfaces. The upper half-ring mounting groove matches the outer ring surface and the pair of side surfaces of the upper half-ring core.
3. A cable-type current transformer according to claim 2, characterized in that: The outer sides of the upper half-ring iron core with a pair of adjacent sides are provided with a pair of upper locking slots. The upper half-ring cover has a mounting groove that matches the upper half-ring iron core. The mounting groove matches the inner ring surface and a pair of adjacent sides of the upper half-ring iron core. The outer sides of the upper half-ring cover with a pair of adjacent sides are provided with a pair of upper buckles. The upper half-ring cover and the upper half-ring mutual inductance housing are connected by matching upper buckles and upper locking slots.
4. A cable-type current transformer according to claim 1, characterized in that: The lower half-ring core also includes an outer ring surface, an inner ring surface, and a pair of side surfaces. The skeleton includes an inner skeleton that mates with the inner ring surface of the lower half-ring core and an outer skeleton that mates with the outer ring surface.
5. A cable-type current transformer according to claim 4, characterized in that: The inner frame includes a horizontal plate with a pair of vertically arranged upright plates. Each upright plate has a pair of vertically arranged wing plates on its outer side. Each pair of wing plates has an inner buckle near the horizontal plate on its far side. The outer frame includes a U-shaped plate with a pair of outwardly extending and parallel-to-the-side slots on its two side plates. The bottom plate of the U-shaped plate has a pair of cross-shaped and outwardly extending frame plates. The outer frame is buckled to the inner frame. After the outer frame is buckled to the inner frame, a coil is wound around it to form the lower half of the loop assembly.
6. A cable-type current transformer according to claim 1, characterized in that: The lower semi-annular mounting groove has mounting posts at its four corners, which are arranged along the opening direction. The mounting posts have cylindrical locking holes arranged along the opening direction. The lower semi-annular cover has protrusions at its four corners. The side of the protrusion that mates with the lower semi-annular mutual inductance housing has a vertically arranged cylindrical buckle. The lower semi-annular cover is buckled to the lower semi-annular mutual inductance housing.