Current transformer

Abstract

The utility model discloses a current transformer, and relates to the technical field of current equipment. Comprising a unit mutual inductance module, signal connection with the other unit mutual inductance module is completed through one face of the unit mutual inductance module, the two unit mutual inductance modules are relatively independent, and power supply connectors used for making contact with a power source are fixed to the two ends of the top of each unit mutual inductance module. Power supply between the two unit mutual inductance modules can be completed by supplying power to the two crossed power supply connectors at the tops of the two unit mutual inductance modules; an interface used for being directly connected with electric equipment is formed in the position of the central axis in the unit mutual inductance module. By adopting the design of the unit mutual inductance module, the two modules are relatively independent and can be flexibly connected, so that the assembly position can be conveniently changed according to the use scene, and the connection requirements of electric equipment at different steering positions can be met.

Description

Technical Field

[0001] This utility model relates to the field of current equipment technology, specifically to current transformers. Background Technology

[0002] A current transformer is a device used in power systems to measure current or protect circuits.

[0003] A search revealed that Chinese utility model application CN215578164U proposes "a current transformer." After the fixing plate is fixed to the base plate via a rotating sleeve, a negative pressure is generated by drawing air from the groove using an airbag. This strengthens the adhesion between the rotating sleeve and the screw, preventing the rotating sleeve from loosening and improving the stability of the rotating sleeve's fixation between the fixing plate and the base plate. Simultaneously, it utilizes FR-EPP epoxy resin...

[0004] The flame-retardant coating of high-efficiency flame retardant can improve the flame retardancy of the transformer body and reduce the safety hazards that may occur in the event of a fire.

[0005] However, in actual use, the aforementioned disclosed devices and existing devices of the same type have poor adaptability to irregular installation positions because the fixed iron core windings are difficult to adjust according to the equipment layout. Utility Model Content

[0006] The purpose of this invention is to provide a current transformer to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a current transformer, comprising:

[0008] Each unit mutual inductor module completes the signal connection with another unit mutual inductor module through one side of itself. The two unit mutual inductor modules are relatively independent, and both ends of the top are fixed with power supply connectors for contacting the power source. During the assembly process, the two unit mutual inductor modules can be powered by supplying power to the two power supply connectors that intersect on the top of the two unit mutual inductor modules.

[0009] An interface for direct connection of electrical equipment is formed at the central axis of the unit mutual inductance module. During the assembly process, the assembly position of either unit mutual inductance module can be changed according to the usage scenario, and the assembly between the electrical equipment and the interface at two different turning positions can be completed.

[0010] Furthermore, the two mutual inductance modules are respectively the first mutual inductance module and the second mutual inductance module;

[0011] The top and bottom of the inner side of the first unit mutual inductance module are respectively fixed with contact protrusions, and several induction protrusions for signal connection are fixed in the middle of the contact protrusions.

[0012] The top and bottom of the inner side of the second unit mutual inductance module are respectively provided with retention grooves that are adapted to the contact protrusions. The second unit mutual inductance module has an assembly protrusion that matches the position of the sensing protrusion in the middle of each retention groove.

[0013] The assembly protrusion and the sensing protrusion fit together when the first unit mutual inductance module and the second unit mutual inductance module are assembled with the help of the contact protrusion and the retention groove, and complete the signal connection between the first unit mutual inductance module and the second unit mutual inductance module.

[0014] Furthermore, the contact protrusion surface is symmetrically equipped with a storage seat at both ends along the axial direction, and the corresponding retention groove cavity is fixedly provided with an assembly bracket at the axial end. When either the first unit mutual inductance module or the second unit mutual inductance module moves relative to each other along the inner plane bonding direction, the assembly bracket and the storage seat achieve axial alignment and fitting through the inner plane bonding guide.

[0015] Furthermore, a magnetic layer is provided on the surface of the contact protrusion at the position where the sensing protrusion is removed, and a contact layer with opposite polarity is provided on the inner wall of the retention groove corresponding to the contact area of ​​the magnetic layer. When the first unit mutual inductance module and the second unit mutual inductance module are assembled, the contact protrusion and the magnetic layer in the retention groove achieve pre-positioning adsorption through opposite magnetic poles.

[0016] Furthermore, the two assembly hangers are erected in the retention groove, and the hooks at one end of the two assembly hangers are oriented in the same axial direction. The inner cavity of the storage seat is provided with a guide slope that matches the movement trajectory of the hook. When the assembly hanger slides along the axial direction of the storage seat, the guide slope guides the hook to achieve radial elastic deformation until the hook is completely inside the storage seat and then returns to its initial shape to form an axial limit.

[0017] Furthermore, a guide groove is provided on the axial mating surface of the mounting bracket and the storage base, and a limiting steel ball is embedded in the guide groove. An elastic limiting block is provided in the inner cavity of the storage base corresponding to the end position of the guide groove. When the mounting bracket is pushed along the axial direction of the storage base, the limiting steel ball rolls in the guide groove and triggers the elastic limiting block to deform until the mounting bracket is fully embedded and thus forms a position.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] This current transformer, by adopting a unit mutual inductance module design, allows the two modules to be relatively independent yet flexibly connected, which not only facilitates changing the assembly position according to the usage scenario, but also meets the connection requirements of electrical equipment in different turning positions.

[0020] Furthermore, the cooperation between contact protrusions and retention grooves, and between sensing protrusions and assembly protrusions, ensures stable signal transmission between modules. The pre-positioning adsorption of the magnetic layer and contact layer improves the accuracy and convenience of assembly. The axial alignment, limiting and positioning between the assembly hanger and the storage seat are achieved through structures such as guide slopes, limiting steel balls and elastic limiting blocks, ensuring the stability and reliability of the overall structure. Attached Figure Description

[0021] Figure 1 This is an isometric drawing of the present invention;

[0022] Figure 2 This is an assembly drawing of the first sub-inductor of this utility model;

[0023] Figure 3 This is an assembly drawing of the second mutual inductor of this utility model.

[0024] In the diagram: 1. First sub-inductor; 101. First unit inductor module; 102. Contact protrusion; 103. Storage base; 104. Sensing protrusion; 2. Second sub-inductor; 201. Second unit inductor module; 202. Assembly bracket; 203. Assembly protrusion; 204. Retention groove; 3. Interface; 4. Power supply connector. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Before understanding the technical solution proposed in this application, it should be clear that the unit mutual inductance modules involved in this embodiment are all encapsulated with high-strength insulating shells. The shells integrate a ring-shaped iron core and a secondary winding (not shown in the attached drawings). When assembling, the operator first axially aligns the contact protrusion 102 of the first sub-mutual inductor 1, i.e., the first unit mutual inductance module 101, with the retention groove 204 of the second sub-mutual inductor 2, i.e., the second unit mutual inductance module 201. At this time, the magnetic layer and the contact layer generate a pre-adsorption force, ensuring the initial alignment.

[0027] Specifically, such as Figures 1-3 As shown, the specific structure of the current transformer proposed in this application is as follows: The current transformer adopts a split structure design, including:

[0028] Each unit transformer module completes signal connection with another unit transformer module through one side. The two unit transformer modules are physically connected through embedded slots while maintaining relative electrical isolation. Both ends of the top of the unit transformer module are fixed with power supply connectors 4 for contacting the power source. The power supply connectors 4 are made of silver-nickel alloy and have an anti-oxidation coating. During the assembly process, by applying different phase voltages to the two power supply connectors 4 that meet the cross-shaped layout, a stable potential difference can be formed, thereby completing the directional power supply of the unit transformer module. In addition, in actual use, the bottom of the unit transformer module is equipped with shock-absorbing rubber pads to ensure the structural stability when multiple modules are stacked.

[0029] It is worth noting that, in this application, an interface 3 for direct connection of electrical equipment is automatically formed at the position of the central axis inside the unit mutual inductance module. The interface 3 adopts a standardized RJ45 composite port design, integrating dual channels for signal transmission and power delivery. The port is embedded with a magnetic positioning structure. During the assembly process, the two unit mutual inductance modules can achieve 0-degree and 180-degree positioning by rotating the base adjustment device according to the usage scenario, thereby changing the assembly orientation of any module. In addition, when the two modules work together, the position of the interface 3 can be changed to adapt to electrical equipment with different turning positions, and complete the rapid assembly in horizontal, vertical or inclined installation modes.

[0030] As a preferred embodiment, the two mutual inductance modules in this embodiment are a first mutual inductance module 101 and a second mutual inductance module 201. The first mutual inductance module 101 is injection molded from engineering plastic. Wedge-shaped contact protrusions 102 are fixed to the top and bottom of its inner side using a chamfering process. The surfaces of the contact protrusions 102 are polished to reduce assembly friction. Three gold-plated hemispherical sensing protrusions 104 are fixed at equal intervals in the middle of the contact protrusions 102. These sensing protrusions are arranged in a matrix and connected to the internal circuitry of the module via embedded wires. The second mutual inductance module 201 is made of metal composite material. Trapezoidal retention grooves 20, precisely matching the geometric parameters of the contact protrusions 102, are machined from the top and bottom of its inner side using CNC milling. 4. The inner wall of the groove is covered with an insulating coating. The second unit mutual inductance module 201 is embedded in the middle of each retention groove 204 with an elastic assembly protrusion 203 that precisely corresponds to the position of the sensing protrusion 104. When the first unit mutual inductance module 101 and the second unit mutual inductance module 201 are assembled with the wedge structure of the retention groove 204 by means of the contact protrusion 102, the copper contacts of the assembly protrusion 203 and the gold-plated surface of the sensing protrusion 104 form a stable conduction under the contact pressure. At the same time, the lateral constraint force generated by the wedge structure can effectively prevent the module from being misaligned. What is important is that this implementation scheme not only realizes the synchronous completion of physical connection and signal transmission, but its unique foolproof structure can also avoid reverse installation through the asymmetrical distribution of the contact protrusion 102 and the retention groove 204. It is suitable for industrial automation equipment connection scenarios that require frequent disassembly and assembly.

[0031] As a preferred embodiment, in this embodiment, the storage seats 103 are symmetrically installed at both ends of the axial direction of the contact protrusion 102. At the same time, the axial end of the cavity of the retention groove 204 corresponding to the storage seat 103 is fixedly provided with the assembly hanger 202. When any component of the first unit mutual inductance module 101 or the second unit mutual inductance module 201 moves relative to each other along the inner plane bonding direction, the assembly hanger 202 and the storage seat 103 achieve axial alignment and fitting through the inner plane bonding guide, ensuring precise docking between components.

[0032] As a preferred embodiment, in this embodiment, a magnetic layer is specially provided on the surface of the contact protrusion 102 at the position of the rejection sensing protrusion 104. At the same time, a contact layer with opposite polarity is provided on the inner wall of the retention groove 204 corresponding to the contact area of ​​the magnetic layer. When the first unit mutual inductance module 101 and the second unit mutual inductance module 201 are assembled, the contact protrusion 102 and the magnetic layer in the retention groove 204 attract each other through opposite magnetic poles, thereby achieving pre-positioning adsorption, which provides convenience for the rapid and accurate assembly of the components.

[0033] In a preferred embodiment, two mounting brackets 202 are erected within the retaining groove 204, with the hooks at one end of each bracket facing the same axial direction. A guide ramp 105, matching the movement trajectory of the hooks, is provided within the cavity of the storage base 103. When the mounting bracket 202 slides axially along the storage base 103, the guide ramp 105 guides the hooks to undergo radial elastic deformation. Once the hooks are fully inside the storage base 103, they return to their initial shape, thus forming an axial limit and ensuring a stable connection between the mounting bracket 202 and the storage base 103.

[0034] In a preferred embodiment, a guide groove is specially provided on the axial mating surface of the mounting bracket 202 and the storage base 103. A limiting steel ball 107 is embedded in the guide groove, and an elastic limiting block 108 is provided in the inner cavity of the storage base 103 corresponding to the end of the guide groove 106. When the mounting bracket 202 is pushed forward along the axial direction of the storage base 103, the limiting steel ball 107 rolls in the guide groove 106 and triggers the elastic limiting block 108 to deform. This design ensures that the mounting bracket 202 can be positioned after being fully embedded, thereby ensuring the stability and reliability of the entire device.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A current transformer, characterized in that, include: The unit mutual inductance module completes the signal connection with another unit mutual inductance module through one side of itself. The two unit mutual inductance modules are relatively independent, and both ends of the top are fixed with power supply connectors (4) for contacting the power supply. During the assembly process, the two unit mutual inductance modules can complete the power supply between the two unit mutual inductance modules by supplying power to the two power supply connectors (4) that cross the top of the two unit mutual inductance modules. At the position of the central axis inside the unit mutual inductance module, an interface (3) for direct connection of electrical equipment is formed. During the assembly process, the assembly position of any one of the two unit mutual inductance modules can be changed according to the usage scenario, and the assembly between the two electrical equipment and the interface (3) at different turning positions can be completed.

2. The current transformer according to claim 1, characterized in that: The two mutual inductance modules are the first mutual inductance module (101) and the second mutual inductance module (201). The top and bottom of the inner side of the first unit mutual inductance module (101) are respectively fixed with contact protrusions (102), and a number of sensing protrusions (104) for signal connection are fixed in the middle of the contact protrusions (102). The second unit mutual inductance module (201) has retention grooves (204) adapted to the contact protrusion (102) on the top and bottom of its inner side. The second unit mutual inductance module (201) has an assembly protrusion (203) in the middle of each retention groove (204) that matches the position of the sensing protrusion (104). The assembly protrusion (203) and sensing protrusion (104) fit together when the first unit mutual inductance module (101) and the second unit mutual inductance module (201) are assembled with the contact protrusion (102) and the retention groove (204), and complete the signal connection between the first unit mutual inductance module (101) and the second unit mutual inductance module (201).

3. The current transformer according to claim 2, characterized in that: The contact protrusion (102) has a storage seat (103) symmetrically installed at both ends of its axial direction. The corresponding retention groove (204) cavity is fixedly provided with an assembly hanger (202). When either the first unit mutual inductance module (101) or the second unit mutual inductance module (201) moves relative to each other along the inner plane bonding direction, the assembly hanger (202) and the storage seat (103) achieve axial alignment and fitting through the inner plane bonding guide.

4. The current transformer according to claim 2, characterized in that: A magnetic layer is provided on the surface of the contact protrusion (102) at the position where the sensing protrusion (104) is removed. A contact layer with opposite polarity is provided on the inner wall of the retention groove (204) corresponding to the contact area of ​​the magnetic layer. When the first unit mutual inductance module (101) and the second unit mutual inductance module (201) are assembled, the contact protrusion (102) and the magnetic layer in the retention groove (204) achieve pre-positioning adsorption through opposite magnetic poles.

5. The current transformer according to claim 3, characterized in that: Two mounting brackets (202) are erected in the retention groove (204). The hooks at one end of the two mounting brackets (202) are all facing the same axial direction. The inner cavity of the storage seat (103) is provided with a guide slope that matches the movement trajectory of the hook. When the mounting bracket (202) slides along the axial direction of the storage seat (103), the guide slope (105) guides the hook to achieve radial elastic deformation until the hook is completely inside the storage seat (103) and then returns to its initial shape to form an axial limit.

6. The current transformer according to claim 3, characterized in that: The axial mating surfaces of the mounting bracket (202) and the storage base (103) are provided with guide grooves, and limit steel balls are embedded in the guide grooves. An elastic limit block is provided in the inner cavity of the storage base (103) at the end of the guide groove (106). When the mounting bracket (202) is pushed along the axial direction of the storage base (103), the limit steel ball (107) rolls in the guide groove (106) and triggers the elastic limit block (108) to deform until the mounting bracket (202) is fully embedded and thus forms a position.

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