Pluggable Rogowski coil
By designing a flexible coil with components such as a Y-shaped housing with a circuit board and a locking block, the problem of unstable contact in plug-in Rogowski coils was solved, achieving a stable connection and accurate measurement, thus improving the continuity and accuracy of the measurement.
Patent Information
- Application Number
- CN202520140414.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2035-01-21
AI Technical Summary
Existing pluggable Rogowski coils have poor contact stability and are prone to loosening, resulting in inaccurate and discontinuous measurement data.
A flexible coil with a Y-shaped housing and circuit board was designed. It adopts a movable head and fixed head structure, combined with components such as locking block, locking plate and locking protrusion. Through the design of inclined surface, arc surface and circular arc surface, it can achieve stable connection and positioning, avoid measurement blind zone and improve measurement accuracy.
Stable connection of flexible coils was achieved, reducing fluctuations and interruptions in measurement signals and improving the accuracy and continuity of measurements.
Smart Images
Figure CN223883646U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a roth coil technical field more specifically, it relates to a plug-in roth coil. BACKGROUND
[0002] At present, roth coil is a kind of hollow annular flexible coil, also called Rogowski flexible coil or roth current sensor, it is a kind of electrical equipment for measuring alternating current, can directly be measured on the conductor of measured alternating current, roth coil is suitable for the measurement of alternating current in relatively wide frequency range, has no special requirement to conductor and size, has relatively fast instantaneous reaction ability, is widely applied in traditional current measurement device such as current transformer cannot be used occasion.
[0003] But the above-mentioned prior art still has some defects, the installation position and mode of roth coil have certain requirements, whether the position of cable is accurate can influence the accuracy of measurement data, the contact stability of existing plug-in roth coil is poor and easy to loosen, appears loosening phenomenon, leads to the increase of contact resistance, makes measurement signal appear fluctuation, attenuation or even interruption, influences the accuracy and continuity of measurement. UTILITY MODEL CONTENT
[0004] In view of the deficiencies in the prior art, the utility model provides a plug-in roth coil.
[0005] To achieve the above object, the utility model provides the following technical scheme: including flexible coil still including Y character shell with circuit board, the flexible coil is provided with movable head and fixed head, the fixed head is provided with notch, the Y character shell is provided with the insulating sleeve that is adapted to movable head and fixed head, the fixed head is fixedly connected with the insulating sleeve, the movable head is movably connected with the insulating sleeve, the movable head is provided with the convex inclined plane A, and the movable head major diameter is greater than the inner diameter of insulating sleeve.
[0006] The utility model is further provided as follows: the Y character shell is provided with the convex A with cavity A, the cavity A is provided with locking block, the locking block is provided with locking plate, the locking plate is provided with inclined plane B, and the locking plate is provided with the arc surface that is adapted to flexible coil.
[0007] The utility model is further provided as follows: the locking plate is provided with the bent locking convex, and the movable head is provided with the locking groove that is adapted to locking convex.
[0008] The utility model is further provided as follows: the locking block is provided with the locking switch with convex, the Y character shell is provided with the opening C that is adapted to locking switch, the locking block is provided with cavity B, and the cavity B is provided with reset spring.
[0009] The utility model further sets up: The Y character casing is provided with arc surface The arc surface distance flexible coil center distance is less than flexible coil center radius.
[0010] The utility model further sets up: The arc surface is provided with arc concave cavity.
[0011] The utility model further sets up: The arc surface sets trapezoidal recess, trapezoidal recess is close to flexible coil rotation center.
[0012] Summarized above, the utility model has following beneficial effect: through the setting of slope A makes the sealing more closely, makes internal element not easy to be affected by outside environment, locking block fixes flexible coil, and the setting of inclined locking plate makes the action of locking block limit movable head axial, makes the utility model flexible coil stable and not easy to shift, makes the cooperation of movable head and insulating sleeve make the utility model stable and convenient.
[0013] The setting of arc surface makes the utility model can avoid the influence of measuring blind area, and the setting of arc concave cavity is used for positioning, so that the suitable measuring position can be obtained simply and conveniently when the utility model is used, and more accurate measurement data can be obtained, and the bandage can pass through the trapezoidal recess, to fix the utility model and the measured electric wire. ACCURACY
[0014] Fig. 1 It is the structural schematic diagram of this embodiment;
[0015] Fig. 2 It is the explosion structural schematic diagram of this embodiment;
[0016] Fig. 3 It is the structure schematic diagram of one locking block of this embodiment;
[0017] Fig. 4 It is the structure schematic diagram of one locking block of this embodiment;
[0018] Fig. 5 It is the structure schematic diagram of one locking block of this embodiment;
[0019] Fig. 6 It is the structure schematic diagram of one locking block of this embodiment;
[0020] Reference numerals: 1, flexible coil;11, movable head;111, slope A;112, locking recess;12, fixed head;121, notch;2, Y character casing;21, insulating sleeve;22, protrusion A;23, arc surface;231, trapezoidal recess;232, arc concave cavity;24, cavity A;3, locking block;31, locking plate;311, slope B;312, arc surface;313, locking protrusion;32, locking switch;33, cavity B;331, reset spring. Detailed Implementation
[0021] The present invention will be further described in detail below with reference to the accompanying drawings.
[0022] This embodiment discloses a pluggable Rogowski coil, such as Figs. 1 to 4 As shown, the device includes a flexible coil 1 and a Y-shaped housing 2 with a circuit board. The flexible coil 1 is provided with a movable head 11 and a fixed head 12. The fixed head 12 is provided with a notch 121. The notch 121 is provided to facilitate the lead-out of the internal wires of the flexible coil 1, and also to provide a certain deformation during the installation of the fixed head 12, making the installation more convenient. The Y-shaped housing 2 is provided with an insulating sleeve 21 adapted to the movable head 11 and the fixed head 12. The insulating sleeve 21 is made of rubber. The fixed head 12 is fixedly connected to the insulating sleeve 21, and the movable head 11 is movably connected to the insulating sleeve 21. The movable head 11 is provided with a protruding inclined surface A111. The large diameter of the movable head 11 is larger than the inner diameter of the insulating sleeve 21. The inclined surface A111 provides a stable interference fit when the movable head 11 and the insulating sleeve 21 are engaged, ensuring a stable connection that is not easily loosened. The inclined surface A111 also makes the seal of this device tighter, making the internal components less susceptible to external environmental influences.
[0023] In this embodiment, the locking plate 31 has different implementations, which will be described below with reference to the accompanying drawings.
[0024] Example 1: Refer to Figs. 3 to 4 The Y-shaped housing 2 is provided with a protrusion A22 having a cavity A24. A locking block 3 is provided in the cavity A24. The locking block 3 is provided with a locking plate 31. The locking plate 31 has an inclined surface B311 and an arc-shaped surface 312 that fits with the flexible coil 1. The locking plate 31, located near the flexible coil 1, restricts the axial movement of the movable head 11. The inclined surface B311 further presses against the movable head 11 when the locking plate 31 approaches the flexible coil 1, resulting in better stability. The arc-shaped surface 312 reduces stress concentration in the flexible coil 1 when the locking plate 31 contacts and locks it, thus reducing fatigue and increasing the service life of the flexible coil 1.
[0025] Example 2: Refer to Figs. 5 to 6The locking plate 31 is provided with a bent locking protrusion 313, and the movable head 11 is provided with a locking groove 112 matched with the locking protrusion 313. Through cooperation of the locking protrusion 313 and the locking groove 112, the locking protrusion 313 can further limit axial movement of the movable head 11, so that the movable head 11 is difficult to move, and the locking protrusion 313 can limit radial movement of the movable head 11 by being close to and pressing the movable head 11, and the locking protrusion 313 can press the movable head 11 to reduce shaking when a gap appears due to aging of the movable head 11.
[0026] Further improvement, the locking block 3 is provided with a locking switch 32 with a protrusion, the Y-shaped shell 2 is provided with an opening C matched with the locking switch 32, the locking block 3 is provided with a cavity B33, and the cavity B33 is provided with a reset spring 331. The locking plate 31 is close to and presses the flexible coil 1 under the spring force of the reset spring 331, the opening C is arranged so that the locking switch 32 can freely extend out, and the reset spring 331 is arranged so that the locking switch 32 is in the extended opening C in a normal state, facilitating pressing of the locking switch 32 to release the locking.
[0027] Further improvement, the Y-shaped shell 2 is provided with a circular arc surface 23, and the distance between the circular arc surface 23 and the center of the flexible coil 1 is less than the radius of the center of the flexible coil 1. When the Rogowski coil is used, there are measurement dead angles at both ends of the coil, the circular arc surface 23 is arranged so that all the flexible coil 1 is in an effective measurement range, the measurement dead angle is excluded, and the accuracy of the utility model is improved.
[0028] Further improvement, the circular arc surface 23 is provided with an arc-shaped recess 232. The arc-shaped recess 232 is arranged for positioning, so that the conductor is in the arc-shaped recess 232 when the same conductor is measured at different times, the influence of relative position movement on measurement data is reduced, and the utility model has better accuracy.
[0029] Further improvement, the circular arc surface 23 is provided with a trapezoidal groove 231 close to the rotation center of the flexible coil 1. The trapezoidal groove 231 is arranged so that, when the utility model is used to measure a conductor, a bandage is passed through the trapezoidal groove 231, so that the utility model and the measured conductor can be stably and reliably fixed, and the utility model can obtain more accurate data.
[0030] Working principle of the utility model
[0031] When the utility model is used, the movable head 11 is taken out by pressing the locking switch 32, the Y-shaped shell 2 is close to the conductor to be measured, the arc-shaped concave cavity 232 is close to and contacts the conductor, the fixing belt is passed through the trapezoidal groove 231, the utility model can be simply fixed with the conductor to be measured, the movable head 11 is connected into the Y-shaped shell 2 by pressing the locking switch 32, the button is loosened, the locking plate 31 is pressed tightly the flexible coil 1 under the action of spring elasticity, so that the utility model obtains the stable and reliable connection state, and the measurement reading can be conveniently started.
[0032] The above only is the preferred embodiment of the utility model, and is not used for limiting the utility model, and any modification, equivalent replacement, improvement and the like within the design concept of the utility model should be contained in the protection scope of the utility model.
Claims
1. A plug-in Rogowski coil comprising a flexible coil (1), characterized in that: Also include the Y-shaped shell (2) with circuit board, the flexible coil (1) is provided with movable head (11) and fixed head (12), the fixed head (12) is provided with gap (121), the Y-shaped shell (2) is provided with the insulating sleeve (21) adapted to movable head (11) and fixed head (12), the fixed head (12) is fixedly connected with the insulating sleeve (21), the movable head (11) is movably connected with the insulating sleeve (21), the movable head (11) is provided with convex inclined surface A (111), the movable head (11) is greater than the inner diameter of the insulating sleeve (21).
2. A plug-in Rogowski coil according to claim 1, characterized in that: The Y-shaped shell (2) is provided with convex A (22) with cavity A (24), the cavity A (24) is provided with locking block (3), the locking block (3) is provided with locking plate (31), the locking plate (31) is provided with inclined surface B (311), the locking plate (31) is provided with arc surface (312) adapted to flexible coil (1).
3. An plug-in Rogowski coil according to claim 2, characterized in that: The locking plate (31) is provided with bent locking protrusion (313), the movable head (11) is provided with locking groove (112) adapted to locking protrusion (313).
4. A plug-in Rogowski coil according to any one of claims 2 to 3, characterized in that: The locking block (3) is provided with locking switch (32) with protrusion, the Y-shaped shell (2) is provided with opening C adapted to locking switch (32), the locking switch (32) is provided with cavity B (33), the cavity B (33) is provided with reset spring (331).
5. A plug-in Rogowski coil according to any one of claims 1 to 3, characterized in that: The Y-shaped shell (2) is provided with circular arc surface (23), the distance between the circular arc surface (23) and the center of the flexible coil (1) is less than the radius of the center of the flexible coil (1).
6. An insertable Rogowski coil according to claim 5, characterized in that: The circular arc surface (23) is provided with arc-shaped recess (232).
7. An plug-in Rogowski coil according to claim 5, characterized in that: The circular arc surface (23) is provided with trapezoidal groove (231), and the trapezoidal groove (231) is close to the rotation center of the flexible coil (1).