Auxiliary automatic eccentricity adjusting structure for current transformer

Abstract

The utility model discloses an auxiliary automatic eccentricity adjusting structure for a current transformer, which comprises two semicircular metal shielding cases, the two metal shielding cases are matched to form a complete annular metal shielding case, and the opposite ends of the two metal shielding cases are detachably limited and fixedly matched through a limiting and locking assembly. The other opposite ends of the two metal shielding covers form detachable locking and fixing matching through lock catches, a plurality of eccentric distance self-adjusting assemblies are arranged on the inner side of the complete circular-ring-shaped metal shielding cover at equal intervals around a shaft, and the eccentric distance self-adjusting assemblies are all arranged in the radial direction of the metal shielding cover. And the eccentric distance self-adjusting assembly and the metal shielding cover form elastic limiting fit, so that the eccentric distance can be automatically adjusted, and the auxiliary wire is always located in the middle of the Rogowski ring.

Description

TECHNICAL FIELD

[0001] The utility model relates to power system signal acquisition equipment technical field, especially a kind of auxiliary automatic eccentricity adjusting structure for current transformer. BACKGROUND

[0002] Modern power systems face increasing challenges, with increasing system complexity. From traditional resistive loads to modern electronic devices and renewable energy systems, the diversity of load characteristics poses higher requirements for the measurement accuracy of current transformers. In addition to traditional centralized power generation, the popularity of distributed power generation such as solar panels and wind turbines makes the structure of the power system more complex, and the current path and flow direction more variable. Many modern devices, such as frequency converters, switching power supplies, etc., introduce a large number of harmonics, which affect the measurement accuracy of current transformers.

[0003] Current transformers need to provide accurate measurement results under different working conditions, which is crucial for ensuring the safety and efficient operation of power systems. The existence of eccentricity can exacerbate these challenges, leading to increased measurement errors, especially in complex electromagnetic environments. Therefore, it is particularly important to reduce eccentricity to improve the stability of current transformers, which not only helps to improve measurement accuracy, but also enhances the robustness of the transformer when facing various disturbances. In addition, this also conforms to the current trend of intelligentization and high efficiency of power systems, helping to achieve more accurate power grid management and energy utilization optimization. SUMMARY

[0004] The utility model provides a kind of auxiliary automatic eccentricity adjusting structure for current transformer, to solve the problem of the above prior art in detection process will produce eccentricity influence detection accuracy.

[0005] To solve the above technical problems, the technical solution adopted by the utility model is:

[0006] An auxiliary automatic eccentricity adjusting structure for current transformer includes two semicircular metal shielding covers, two metal shielding covers cooperate to form a complete circular metal shielding cover, and the opposite ends of the two metal shielding covers are detachably limited and fixed by a limiting locking assembly, and the opposite ends of the two metal shielding covers are detachably locked and fixed by a lock buckle. The complete circular metal shielding cover is provided with a plurality of eccentricity self-adjusting assemblies on the inner side around the shaft at equal intervals, the eccentricity self-adjusting assemblies are arranged radially along the metal shielding cover, and the eccentricity self-adjusting assemblies and the metal shielding cover form elastic limiting cooperation.

[0007] As preferably, the limiting locking assembly comprises a limiting plate arranged at one end of one of the metal shielding covers, the limiting plate extends outwardly and is provided with limiting holes, and a limiting block is arranged at the end of the other metal shielding cover opposite to the limiting plate, the limiting block is embedded in the corresponding limiting hole to form a limiting fixed fit.

[0008] As more preferably, when the limiting block is embedded in the corresponding limiting hole to form the limiting fixed fit, the opposite ends of the two metal shielding covers are in close contact.

[0009] Further, the number of the eccentricity self-adjusting assemblies is even, and each pair of opposite eccentricity self-adjusting assemblies is symmetrical about the central axis of the complete circular metal shielding cover.

[0010] Further, the eccentricity self-adjusting assembly comprises a scale arranged in the radial direction, the scale penetrates the metal shielding cover to form a limiting sliding fit, and a gasket is arranged at one end of the scale close to the central axis of the metal shielding cover, the gasket forms an elastic fit with the metal shielding cover through a spring, and the central axis of the spring is parallel to the corresponding scale.

[0011] Specifically, the gasket is fixed to the end of the scale perpendicularly.

[0012] More specifically, the gasket is integrally formed with the scale.

[0013] In detail, the metal shielding cover is provided with first openings arranged in the radial direction and communicating with each other on the inner and outer sides, and the corresponding scale is embedded and penetrates the first openings, and the scale forms a slidable limiting fit with the corresponding first openings.

[0014] More in detail, one side of the metal shielding cover close to the inner first opening is provided with a corresponding second opening, one end of the spring is fixedly fitted with the corresponding gasket, and the other end of the spring penetrates the corresponding second opening and is fixedly fitted with the inner side of the metal shielding cover.

[0015] As more preferably, the spring is an equal parameter spring.

[0016] The beneficial effects of the utility model are as follows:

[0017] 1. The measuring system can realize automatic adjustment and high-precision adjustment of the eccentricity during the measurement of the current transformer.

[0018] 2. The utility model can effectively reduce the influence of high-frequency electromagnetic waves on the current transformer during operation and reduce the interference factors caused by the environment. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 It is a schematic diagram of the installation structure of the utility model;

[0020] Fig. 2 This is a schematic diagram of the disassembly structure of this utility model;

[0021] In the diagram: 1. Metal shielding cover; 21. First opening; 22. Second opening;

[0022] 3. Eccentricity self-adjusting component; 31. Shim; 32. Spring; 33. Scale;

[0023] 4. Limit locking assembly; 41. Limit plate; 42. Limit hole; 43. Limit block;

[0024] 5. Locking latch. Detailed Implementation

[0025] The embodiments will be further described below with reference to the accompanying drawings.

[0026] like Figs. 1-2 As shown in the preferred embodiment 1, an auxiliary automatic eccentricity adjustment structure for a current transformer includes two semi-circular metal shields 1. The two metal shields 1 cooperate to form a complete annular metal shield 1, and the opposite ends of the two metal shields 1 form a detachable limiting and fixing engagement through a limiting and locking component 4. The opposite ends of the two metal shields 1 form a detachable locking and fixing engagement through a latch 5. A plurality of eccentricity self-adjusting components 3 are provided at equal intervals around the axis on the inner side of the complete annular metal shield 1. The eccentricity self-adjusting components 3 are all arranged radially along the metal shield 1, and the eccentricity self-adjusting components 3 and the metal shield 1 form an elastic limiting engagement.

[0027] This device can be used for opening and closing Rogowski coil current transformers. After the metal shield 1 forms a complete ring, it is concentric and coaxial with the opening and closing Rogowski coil current transformer. The opening and closing Rogowski coil current transformer is placed inside the metal shield 1. First, one side of the metal shield 1 is limited and installed by the limiting locking component 4. Then, the other side of the metal shield 1 is locked by the latch 5, thus completing the installation of the entire metal shield 1 on the opening and closing Rogowski coil current transformer. Several eccentricity self-adjusting components 3 arranged at equal intervals on the metal shield 1 will, under the action of elasticity, squeeze the cable towards the middle radially, and after stabilization, keep the cable in the middle position so that it does not deviate too much, thus assisting in the automatic adjustment of the eccentricity.

[0028] The Rogowski coil current transformer 1 consists of two semi-circular PCB boards. The coil is wound and is responsible for acquiring current data. The acquired data is sent to the output port through an RC active integrator.

[0029] The limiting locking assembly 4 includes a limiting plate 41 arranged at one end of one of the metal shielding covers 1, the limiting plate 41 extends outwardly and is provided with a limiting hole 42, the other metal shielding cover 1 is provided with a limiting block 43 at the end opposite to the limiting plate 41, the limiting block 43 is embedded in the corresponding limiting hole 42 to form a limiting fixed fit. Ensure the effect of limiting fixation, convenient installation and disassembly.

[0030] When the limiting block 43 is embedded in the corresponding limiting hole 42 to form a limiting fixed fit, the opposite ends of the two metal shielding covers 1 are tightly attached. Ensure that the semicircular metal shielding cover 1 can be completely closed after limiting installation.

[0031] The number of the eccentricity self-adjusting assembly 3 is even, each pair of opposite eccentricity self-adjusting assemblies 3 is symmetrical about the center axis of the complete circular metal shielding cover 1. Further ensure the stability of the force, so that the cable can maintain force balance as much as possible in the middle position.

[0032] The eccentricity self-adjusting assembly 3 includes a scale 33 arranged in the radial direction, the scale 33 penetrates the metal shielding cover 1 where it is arranged to form a limiting sliding fit, the scale 33 is provided with a gasket 31 at one end close to the center axis of the metal shielding cover 1, the gasket 31 forms an elastic fit with the metal shielding cover 1 where it is arranged through a spring 32, the middle axis of the spring 32 is parallel to the corresponding scale 33. When measuring, the measured wire presses the spring 32, so that the scale 33 extends out, and the uniformly distributed spring 32 makes the measured wire always located in the center of the Rogowski coil, achieving the purpose of automatically reducing the eccentricity. The length of each scale 33 extending out can be used to read the eccentricity and judge whether the eccentricity is large.

[0033] The gasket 31 is fixed to the end of the scale 33 perpendicularly to the scale 33. Ensure the stability of the force on the side wall of the wire.

[0034] The gasket 31 is integrally formed with the scale 33. Convenient for use and installation.

[0035] The metal shielding cover 1 is provided with a first opening 21 on the inner and outer sides in the radial direction and in communication, the corresponding scale 33 is embedded and penetrates the first opening 21, and the scale 33 forms a slidable limiting fit with the corresponding first opening 21. Ensure the limiting sliding of the scale 33, at the same time provide the scale 33 to extend out, convenient for reading.

[0036] One side of the metal shielding cover 1 close to the inner first opening 21 is provided with a corresponding second opening 22, one end of the spring 32 is fixedly fitted with the corresponding gasket 31, and the other end of the spring 32 penetrates the corresponding second opening 22 and is fixedly fitted with the inner side of the metal shielding cover 1. Ensure the elastic expansion and contraction of the spring 32.

[0037] The spring 32 is an equal parameter spring. Ensure the stability of the force.

[0038] The working principle of the utility model:

[0039] The device can be used for opening and closing the Rogowski coil current transformer, and the metal shielding cover 1 is concentric and coaxial with the opening and closing Rogowski coil current transformer after forming a complete circular ring. The opening and closing Rogowski coil current transformer is placed in the metal shielding cover 1. The metal shielding cover 1 is first limited and installed on one side through the limiting and locking assembly 4, and then the metal shielding cover 1 is locked on the other side through the lock catch 5. The installation of the entire metal shielding cover 1 on the opening and closing Rogowski coil current transformer is completed. The several eccentricity self-adjusting assemblies 3 arranged at equal intervals on the metal shielding cover 1 will be extruded to the middle along the radial direction under the action of elasticity, and after stabilization, the cable will always be located in the middle position, so that it will not deviate too much, and the eccentricity is automatically adjusted.

Claims

1. An auxiliary automatic eccentricity adjustment structure for a current transformer, characterized in that, It includes two semi-circular metal shields (1), which cooperate to form a complete circular metal shield (1). The opposite ends of the two metal shields (1) are connected by a limiting locking component (4) to form a detachable limiting and fixing fit. The opposite ends of the two metal shields (1) are connected by a latch (5) to form a detachable locking and fixing fit. The complete circular metal shield (1) has several eccentricity self-adjusting components (3) arranged at equal intervals around the axis on the inner side. The eccentricity self-adjusting components (3) are all arranged radially along the metal shield (1), and the eccentricity self-adjusting components (3) and the metal shield (1) form an elastic limiting fit.

2. The auxiliary automatic eccentricity adjustment structure for a current transformer according to claim 1, characterized in that, The limiting locking assembly (4) includes a limiting plate (41) disposed at one end of one of the metal shields (1), the limiting plate (41) extends outward and is provided with a limiting hole (42), and a limiting block (43) is provided on the other metal shield (1) opposite to the limiting plate (41), the limiting block (43) is embedded in the corresponding limiting hole (42) to form a limiting and fixing fit.

3. The auxiliary automatic eccentricity adjustment structure for a current transformer according to claim 2, characterized in that, When the limiting block (43) is embedded in the corresponding limiting hole (42) to form a limiting and fixing fit, the opposite ends of the two metal shields (1) are tightly attached.

4. The auxiliary automatic eccentricity adjustment structure for a current transformer according to claim 3, characterized in that, The number of the eccentricity self-adjusting components (3) is an even number, and each pair of opposite eccentricity self-adjusting components (3) is symmetrical about the central axis of the complete circular metal shield (1).

5. The auxiliary automatic eccentricity adjustment structure for a current transformer according to claim 4, characterized in that, Each of the eccentricity self-adjusting components (3) includes a scale (33) arranged radially. The scale (33) passes through the metal shield (1) in the radial direction to form a limiting sliding fit. A shim (31) is provided on one end of the scale (33) near the central axis of the metal shield (1). The shim (31) forms an elastic fit with the metal shield (1) through a spring (32). The middle axis of the spring (32) is parallel to the corresponding scale (33).

6. The auxiliary automatic eccentricity adjustment structure for a current transformer according to claim 5, characterized in that, The gasket (31) is fixed to the end of the scale (33) perpendicular to the scale (33).

7. The auxiliary automatic eccentricity adjustment structure for a current transformer according to claim 6, characterized in that, The gasket (31) and the scale (33) are integrally formed.

8. The auxiliary automatic eccentricity adjustment structure for a current transformer according to claim 7, characterized in that, The metal shield (1) has a first opening (21) that is radially opposite and connected on the inner and outer sides. A corresponding scale (33) is embedded in and passes through the first opening (21). The scale (33) and the corresponding first opening (21) form a sliding limiting fit.

9. The auxiliary automatic eccentricity adjustment structure for a current transformer according to claim 8, characterized in that, The metal shield (1) near the inner first opening (21) has a corresponding second opening (22) on one side. One end of the spring (32) is fixedly engaged with the corresponding gasket (31), and the other end of the spring (32) passes through the corresponding second opening (22) and is fixedly engaged with the inner side of the metal shield (1).

10. An auxiliary automatic eccentricity adjustment structure for a current transformer according to claim 9, characterized in that, All springs (32) are isoparameter springs.

Images