Novel Rogowski coil

Abstract

According to the technical scheme, the novel Rogowski coil is characterized in that the novel Rogowski coil comprises a shell and a flexible coil surrounding a conductor to be measured, the shell is provided with a wire for guiding data, the end portion of the flexible coil is connected with a split type sleeve shell, and the sleeve shell is composed of two half shell bodies and provided with a protrusion A with a buckle A; the shell comprises a fixed shell and a movable cover shell, a groove A matched with the protrusion A is formed in an inner cavity of the fixed shell, and the protrusion A is matched with the groove A of the inner cavity of the fixed shell; a slope A is arranged on the shell close to the groove A. A protrusion B with a slope is arranged on the movable cover shell, and a matched movable groove B is formed in the fixed shell. According to the utility model, the projection A is matched with the groove A, so that the installation position is fixed when the flexible coil is installed, the flexible coil is prevented from being twisted to different degrees during installation, the twisting of the flexible coil is reduced, the distortion of an output signal is reduced, and the measurement accuracy is improved.

Description

Technical Field

[0001] This utility model relates to the field of Rogowski coil technology, and more specifically to a novel Rogowski coil. Background Technology

[0002] Currently, the Rogowski coil is a hollow toroidal flexible coil, also known as the Rogowski flexible coil or Rogowski current sensor. It is an electrical device used to measure alternating current. It can be directly wrapped around the conductor being measured to measure the alternating current. The Rogowski coil is suitable for measuring alternating current over a wide frequency range, has no special requirements for conductor or size, and has a fast instantaneous response capability. It is widely used in situations where traditional current measuring devices such as current transformers cannot be used.

[0003] However, the existing technologies mentioned above still have some drawbacks. When installing existing Rogowski coils, the end of the flexible coil is often directly connected to the fixed movable cover, which makes the flexible coil prone to non-uniform twisting. Moreover, the degree of twisting varies each time, which directly leads to distortion of the output signal, resulting in measurement errors of varying degrees and reducing the accuracy of the measurement. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the present invention provides a novel Rogowski coil.

[0005] To achieve the above objectives, this utility model provides the following technical solution: It includes a housing and a flexible coil surrounding the conductor to be measured. The housing is provided with a data guiding wire. The end of the flexible coil is connected to a split-type sleeve. The sleeve is composed of two halves of the housing and has a protrusion A with a buckle A. The housing includes a fixed shell and a movable cover. The inner cavity of the fixed shell has a groove A corresponding to the protrusion A, and the protrusion A and the groove A in the inner cavity of the fixed shell cooperate. The housing has an inclined surface A near the groove A, the movable cover has a protrusion B with an inclined surface, and the fixed shell has a corresponding movable groove B.

[0006] The present invention is further configured such that the number of protrusions A is two, and they are symmetrically arranged on both sides of the casing.

[0007] The present invention is further configured such that: the inner diameter of the movable cover is adapted to the outer diameter of the flexible coil, and the movable cover is provided with an opening adapted to the protrusion A.

[0008] The present invention is further configured such that: a chip compartment communicating with the inner cavity is opened on the side surface of the fixed shell, the chip compartment integrates an electronic module and has a detachable cover on the outside.

[0009] The present invention is further configured such that: a limiting protrusion C is provided on the end face of the protrusion A, a limiting protrusion D is provided on the fixed shell, and a buckle B adapted to the limiting protrusion C and the limiting protrusion D is provided on the inner side of the movable cover.

[0010] The present invention is further configured such that: a reinforcing groove is provided on the surface of the housing.

[0011] In summary, this utility model has the following beneficial effects: the cooperation between the protrusion A and the groove A makes the installation position fixed when installed on the flexible coil, avoiding different degrees of twisting that may occur during the installation of the flexible coil, reducing the twisting of the flexible coil, thereby reducing output signal distortion and improving measurement accuracy. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this embodiment;

[0013] Figure 2 This is a side sectional view of this embodiment;

[0014] Figure 3 This is an exploded schematic diagram of this embodiment;

[0015] Figure 4 This is a schematic diagram of the second type of explosion in this embodiment;

[0016] Reference numerals: 1. Fixed shell; 11. Groove A; 12. Inclined surface A; 13. Movable groove B; 14. Limiting protrusion D; 15. Reinforcing groove; 2. Movable cover; 21. Protrusion B; 22. Buckle B; 23. Opening; 3. Flexible coil; 4. Shell; 41. Protrusion A; 411. Limiting protrusion C; 42. Buckle A; 5. Chip compartment; 51. Removable cover. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the accompanying drawings.

[0018] This embodiment discloses a novel Rogowski coil, such as Figures 1 to 4As shown, the device includes a housing and a flexible coil 3 surrounding the conductor under test. The housing is provided with a data guiding wire. The flexible coil 3 is connected to a split-type sleeve 4 at its end. The sleeve 4 consists of two halves of the housing and has a protrusion A41 with a snap fastener A42. The two halves of the housing can be easily combined into the sleeve 4 through the snap fastener A42, making it very simple to install the sleeve 4 onto the flexible coil 3 without additional tools. The housing includes a fixed shell 1 and a movable cover 2. The inner cavity of the fixed shell 1 has a groove A11 that corresponds to the protrusion A41. The protrusion A41 and the groove A11 in the inner cavity of the fixed shell 1 cooperate with each other. The protrusion A41 can be inserted into the groove A11. The movable cover 2 can still rotate after installation by sliding within the groove A11. The housing has an inclined surface A12 near the groove A11, and the movable cover 2 has a protrusion B21 with an inclined surface. The fixed housing 1 has a corresponding movable groove B13. During installation, the protrusion B21 with the inclined surface can pass through the groove A11 and enter the movable groove B13 from the inclined surface A12. The protrusion B21 does not obstruct the entry into the movable groove A11. The inclined surface A12 and the inclined surface of the protrusion B21 act as a transition, minimizing the resistance to the entry of the protrusion B21 and making the installation of the movable cover 2 very effortless.

[0019] Furthermore, the number of protrusions A41 is two, symmetrically arranged on both sides of the housing 4. The two protrusions A41 enhance safety and reliability through redundant design and multi-dimensional protection, the symmetrical layout can balance load distribution and reduce stress concentration, improve system stability through mechanical balance, and significantly optimize equipment performance.

[0020] Further improvements include an inner diameter of the movable cover 2 that matches the outer diameter of the flexible coil 3, and an opening 23 corresponding to the protrusion A41. The opening 23 allows the protrusion A41 to smoothly pass through and engage with the groove A11 when the opening 23 is aligned with the groove A11. When the opening 23 is misaligned with the groove A11, the movable cover 2 hinders the movement of the protrusion A41. When the groove A11 engages with the protrusion A41, it effectively holds the protrusion A41 in place, ensuring a reliable and secure fit that is not easily loosened.

[0021] Further improvements include a chip compartment 5 on the side surface of the fixed shell 1, which communicates with the inner cavity. The chip compartment 5 integrates an electronic module and has a removable cover 51 on its outer side. The removable cover 51 facilitates the replacement of the electronic module. During maintenance, only the removable cover 51 needs to be opened for simple and convenient repairs, without having to completely disassemble the shell, making it convenient and reliable.

[0022] To further improve the design, a limiting protrusion C411 is provided on the end face of the protrusion A41, a limiting protrusion D14 is provided on the fixed shell 1, and a buckle B22 corresponding to the limiting protrusions C411 and D14 is provided on the inner side of the movable cover 2. After the movable cover 2 is installed, rotating the movable cover 2 will cause the buckle B22 to engage with the limiting protrusions C411 and D14. The limiting protrusions C411 and D14 will hinder the movement of the buckle B22, preventing the movable cover 2 from rotating easily. The movable cover 2 can effectively block the protrusion A41, making it difficult for it to fall out of the groove A11, thus ensuring a good connection during use.

[0023] To further improve the design, the shell surface is provided with reinforcing grooves 15. By changing the geometry of the shell, the reinforcing grooves 15 can effectively improve the shell's resistance to pressure, bending, and impact, enhancing performance without increasing the shell's thickness and improving the shell's resistance to deformation for thin-walled parts.

[0024] Working principle of this utility model

[0025] During assembly, the flexible coil 3 is placed into the fixed shell 1, the electronic module is placed into the chip compartment 5 and the detachable cover 51 is closed, the protrusion B21 of the movable cover 2 is aligned with the inclined surface A12, and the protrusion B21 can be installed into the movable slot B13 simply by pressing down the movable cover 2 due to the presence of the inclined surface. The split shell 4 is aligned with the end of the flexible coil 3, and a simple press is made so that the protrusion A41 and the buckle A42 cooperate, and the shell 4 is installed. The assembly of this utility model is completed.

[0026] In use, the flexible coil 3 is wrapped around the object to be tested. The opening 23 of the movable cover 2 is rotated to fit the groove A11, allowing the protrusion A41 to pass smoothly through the opening 23 and be installed in the groove A11. Rotating the movable cover 2 causes the buckle B22 to engage with the limiting protrusion C411 and the limiting protrusion D14 to achieve a stable and reliable connection. To unlock, simply rotate the movable cover 2 in the opposite direction so that the opening 23 of the movable cover 2 aligns with the groove A11. The movable cover 2 will no longer obstruct the movement of the protrusion A41, and the end of the flexible coil 3 can be easily removed. This device can be easily removed.

[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the design concept of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel Rogowski coil, comprising a housing and a flexible coil (3) surrounding a conductor to be measured, wherein the housing is provided with a data guiding wire, characterized in that: The flexible coil (3) is connected to a split shell (4) at its end. The shell (4) is composed of two halves and has a protrusion A (41) with a buckle A (42). The shell includes a fixed shell (1) and a movable cover (2). The inner cavity of the fixed shell (1) is provided with a groove A (11) that corresponds to the protrusion A (41). The protrusion A (41) and the groove A (11) in the inner cavity of the fixed shell (1) are fitted together. The shell is provided with a slope A (12) near the groove A (11). The movable cover (2) is provided with a protrusion B (21) with a slope. The fixed shell (1) is provided with a corresponding movable groove B (13).

2. The novel Rogowski coil according to claim 1, characterized in that: The number of protrusions A (41) is two, and they are symmetrically arranged on both sides of the casing (4).

3. The novel Rogowski coil according to claim 1, characterized in that: The inner diameter of the movable cover (2) is adapted to the outer diameter of the flexible coil (3), and the movable cover (2) is provided with an opening (23) adapted to the protrusion A (41).

4. A novel Rogowski coil according to claim 1, characterized in that: The fixed shell (1) has a chip compartment (5) connected to the inner cavity on its side surface. The chip compartment (5) integrates an electronic module and has a detachable cover (51) on its outside.

5. A novel Rogowski coil according to claim 1, characterized in that: The end face of the protrusion A (41) is provided with a limiting protrusion C (411), the fixed shell (1) is provided with a limiting protrusion D (14), and the inner side of the movable cover (2) is provided with a buckle B (22) that is compatible with the limiting protrusion C (411) and the limiting protrusion D (14).

6. A novel Rogowski coil according to claim 1, characterized in that: The surface of the housing is provided with reinforcing grooves (15).

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