Annular current sensor
By designing a ring-shaped current sensor with an openable and closing ring structure, and using a limiting plate, anti-slip rubber, rotatable shaft, and return spring to support the center line of the conductor, the problems of sensor installation instability and measurement deviation were solved, achieving rapid installation and high-precision measurement.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 徐菲
- Filing Date
- 2025-04-28
- Publication Date
- 2026-04-21
AI Technical Summary
Existing current sensors are unstable when installed on transmission lines, leading to measurement deviations and slippage, which affects measurement accuracy.
The ring-shaped current sensor adopts an openable circular structure. The installation stability is increased by limiting plates and anti-slip rubber. The center line of the conductor is aligned with the center line of the sensor by a rotatable shaft and return spring. Combined with PTFE tubing accessories and insulating plastic clamps for fixation, it can achieve rapid installation and improve measurement accuracy.
This technology enables rapid installation and stable fixation of the loop current sensor on power transmission lines, reducing measurement deviations and improving measurement accuracy and installation stability.
Smart Images
Figure CN224152553U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of power monitoring technology, and in particular to a ring current sensor. Background Technology
[0002] Transmission lines are extremely important facilities in the power system. During the operation of transmission lines, it is necessary to monitor the current of the transmission lines in order to determine the current load status of the transmission lines and then carry out corresponding dispatching.
[0003] Current sensors play a crucial role in detecting the operating status of power lines. Commonly used current sensors often employ a ring-shaped structure and are directly mounted on overhead high-potential conductors. When designing current sensors, the applicability of the frame size must be considered. Generally, the inner diameter of the ring is often larger than the conductor diameter. Therefore, when the current sensor is mounted on the conductor, the center line of the sensor does not coincide with the center line of the conductor, which will cause a certain measurement deviation. In addition, due to the sag of overhead conductors, they are not actually placed horizontally and are affected by wind deflection, which can easily cause the current sensor to slide freely on the conductor. Utility Model Content
[0004] This application proposes a ring-shaped current sensor to improve the accuracy of current measurement and installation stability.
[0005] To achieve the above objectives, this application adopts the following technical solution:
[0006] In one aspect, a ring-shaped current sensor is provided, including a sensor coil, a housing, and multiple limiting plates; the housing is an openable ring structure, and the sensor coil is disposed inside the housing; the limiting plates are fixed to the inner wall of the housing by column connecting rods; and anti-slip rubber is affixed to the limiting plates.
[0007] Furthermore, the column connecting rod includes a rotatable shaft and a return spring; the rotatable shaft fixes both ends of the return spring; the limiting plate is connected to the rotatable shaft through a clamp.
[0008] Furthermore, when the housing is in the open state, the limiting plate is in the naturally closed state; when the housing is in the locked state, the limiting plate is pressed against the overhead wire and rotated axially inward, and the return spring provides the limiting plate with a force for axial rotation outward.
[0009] Furthermore, the sensor coil consists of a hollow PCB frame and copper enameled wire wound on the hollow PCB frame.
[0010] Furthermore, the housing is made of a malleable flame-retardant material, and the gap between the housing and the sensor coil is filled with an insulating filler.
[0011] Furthermore, the housing includes a first sub-housing and a second sub-housing; the first end of the first sub-housing is provided with a convex mounting seat, and the first end of the second sub-housing is provided with a concave mounting seat; the second end of the first sub-housing is provided with a positioning block, and the second end of the second sub-housing is provided with a positioning groove; after the first sub-housing and the second sub-housing are engaged, the convex mounting seat and the concave mounting seat are aligned, and the positioning block and the positioning groove are aligned.
[0012] Furthermore, the sensor coil includes a first sub-coil and a second sub-coil; the end of the first sub-coil is provided with a coil lead hole, and the end of the second sub-coil is provided with a coil lead pin; after the ring current sensor is fastened, the coil lead pin is inserted into the corresponding coil lead hole, so that the first sub-coil and the second sub-coil form a complete circuit.
[0013] Furthermore, an explosion-proof connector is provided on the outside of the housing, and the signal output line is connected to the sensor coil through the explosion-proof connector.
[0014] Furthermore, after the first sub-shell and the second sub-shell are engaged, the first sub-shell and the second sub-shell are fixed by bolts, with screw holes provided in the convex mounting base and the concave mounting base.
[0015] Furthermore, an overhead conductor is fitted with a PTFE tube accessory, and insulated plastic clamps are used to fix the two ends of the PTFE tube accessory; a ring-shaped current sensor is fastened to the outside of the PTFE tube accessory.
[0016] In the ring current sensor provided in this application, the openable structure allows for quick installation without disassembling the wiring. A limiting plate fixed to the inner wall of the housing provides a centering force to the overhead conductor passing through the inner ring of the ring current sensor, thus defining the position of the overhead conductor's centerline and ensuring it coincides with the centerline of the ring current sensor, increasing measurement accuracy. Simultaneously, the anti-slip rubber on the limiting plate increases the friction coefficient of the inner ring of the ring current sensor, improving its installation stability and preventing it from sliding on the transmission line. Attached Figure Description
[0017] Figure 1 A schematic diagram of the structure of a ring-shaped current sensor provided for an embodiment of this application;
[0018] Figure 2 A schematic diagram of a column connecting rod provided for an embodiment of this application;
[0019] Figure 3 An installation diagram of a ring current sensor provided for embodiments of this application. Figure 1 ;
[0020] Figure 4An installation diagram of a ring current sensor provided for embodiments of this application. Figure 2 ;
[0021] Figure label:
[0022] 100 ring current sensor, 110 sensor coil, 111 hollow PCB frame, 112 copper enameled wire, 113 coil lead hole, 114 coil lead, 120 housing, 121 first sub-housing, 122 second sub-housing, 123 convex mounting base, 124 concave mounting base, 125 positioning block, 126 positioning groove, 127 bolt, 130 limit plate, 131 anti-slip rubber, 132 clip, 140 filler, 150 column connecting rod, 151 rotatable shaft, 152 return spring, 160 explosion-proof connector, 170 signal output line, 180 PTFE tube accessory, 181 insulating plastic clamp, 200 overhead conductor. Detailed Implementation
[0023] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. Examples of embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. Furthermore, it should be understood that the specific embodiments described herein are merely for explaining this application and are not intended to limit this application.
[0024] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "left", "right", "horizontal", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0026] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0027] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0028] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.
[0029] This application discloses a ring-shaped current sensor, including a sensor coil, a housing, and multiple limiting plates. The housing has an openable ring structure, and the sensor coil is disposed within the housing. The limiting plates are fixed to the inner wall of the housing via column connecting rods. Anti-slip rubber is affixed to the limiting plates.
[0030] In the ring current sensor provided in this application, the openable structure allows for quick installation without disassembling the wiring. A limiting plate fixed to the inner wall of the housing provides a centering force to the overhead conductor passing through the inner ring of the ring current sensor, thus defining the position of the overhead conductor's centerline and ensuring it coincides with the centerline of the ring current sensor, increasing measurement accuracy. Simultaneously, the anti-slip rubber on the limiting plate increases the friction coefficient of the inner ring of the ring current sensor, improving its installation stability and preventing it from sliding on the transmission line.
[0031] Figure 1 A schematic diagram of a ring current sensor is shown, wherein the ring current sensor 100 includes a sensor coil 110, a housing 120 and a plurality of limiting plates 130.
[0032] like Figure 1 As shown, the housing 120 has an openable annular structure, and the sensor coil 110 is disposed inside the housing 120.
[0033] The housing 120 can be made of a plastic flame-retardant material to improve the safety of the ring current sensor.
[0034] The sensor coil 110 consists of a hollow PCB frame 111 and a series of densely arranged copper enameled wires 112 wound on the hollow PCB frame 111.
[0035] The gap between the housing 120 and the sensor coil 110 is filled with an insulating filler 140 to fix the sensor coil 110 inside the housing 120.
[0036] For example, the filler 140 used may be a thermoplastic curd rubber.
[0037] The limiting plate 130 is fixed to the inner wall of the housing 120 by the column connecting rod 150.
[0038] For example, such as Figure 1 As shown, multiple limiting plates 130 are fixed to the inner wall of the housing 120 by corresponding column connecting rods 150, and each limiting plate 130 can rotate independently.
[0039] Anti-slip rubber 131 is affixed to the limiting plate 130.
[0040] In some embodiments, Figure 2 A schematic diagram of a column connecting rod 150 is shown, wherein the column connecting rod 150 includes a rotatable shaft 151 and a return spring 152 inside.
[0041] The two ends of the rotatable shaft 121 are fixed to the return spring 152, and the limiting plate 130 is connected to the rotatable shaft through the clamp 132.
[0042] Based on the structure of the column connecting rod 150, when the housing 120 is in the open state, the limiting plate 130 is in the naturally closed state. When the housing 120 is in the latched state, the limiting plate 130 is abutted by the overhead wire passing through the annular current sensor 100 and rotates axially inward. The return spring 152 provides the limiting plate with an outward axial rotation force to support the center line of the overhead wire to coincide with the center line of the annular current sensor 100.
[0043] In some embodiments, such as Figure 1 As shown, the housing 120 includes a first sub-housing 121 and a second sub-housing 122.
[0044] The first sub-shell 121 has a convex mounting base 123 at its first end, and the second sub-shell has a concave mounting base 124 at its first end.
[0045] A positioning block 125 is provided at the second end of the first sub-shell 121, and a positioning groove 126 is provided at the second end of the second sub-shell.
[0046] After the first sub-shell 121 and the second sub-shell 122 are engaged, the convex mounting base 123 and the concave mounting base 124 are aligned, and the positioning block 125 is aligned with the positioning groove 126.
[0047] Optionally, the positioning groove 126 can be disposed at the second end of the first sub-housing 121, and correspondingly, the positioning block 125 can be disposed at the second end of the second sub-housing 122. That is, the embodiments of this application do not limit the convex mounting base 123 and the positioning block 125 to be disposed in the same sub-housing, or the concave mounting base 124 and the positioning groove 126 to be disposed in the same sub-housing.
[0048] In some embodiments, such as Figure 1 As shown, the sensor coil 110 consists of a first sub-coil disposed inside the first sub-housing 121 and a second sub-coil disposed inside the second sub-housing 122.
[0049] The first sub-coil has a coil lead hole 113 at its end, and the second sub-coil has a coil lead pin 114 at its end.
[0050] Understandably, based on the configuration of the coil lead hole 113 and the coil lead 114, after the ring current sensor 100 is engaged, the coil lead 114 is inserted into the corresponding coil lead hole, so that the first sub-coil and the second sub-coil form a complete circuit, that is, to form the sensor coil 110.
[0051] Optionally, the coil lead 114 can be located at the end of the first sub-coil, and correspondingly, the coil lead hole 113 can be located at the end of the second sub-coil.
[0052] Optionally, a coil lead is provided at the first end of the first sub-coil and a coil lead hole is provided at the second end. A coil lead hole is provided at the first end of the second sub-coil and a coil lead is provided at the second end. In this way, after the ring current sensor is fastened, the first sub-coil and the second sub-coil can also form a complete circuit to form a sensor coil.
[0053] In some embodiments, such as Figure 1 As shown, an explosion-proof connector 160 is provided on the outside of the housing 120. The signal output line 170 is connected to the sensor coil 110 through the explosion-proof connector 160 to upload the collected signal.
[0054] In some embodiments, Figure 3 as well as Figure 4 The installation schematic diagram of the ring current sensor 100 is shown from different perspectives. In the diagram, the overhead wire 200 is fitted with a PTFE tube accessory 180 and fixed at both ends of the PTFE tube accessory with insulating plastic clamps 181. The ring current sensor 100 is fastened to the outside of the PTFE tube accessory 180 to increase the installation firmness and protection of the ring current sensor.
[0055] After the first sub-housing 121 and the second sub-housing 122 are engaged, the first sub-housing 121 and the second sub-housing 122 are fixed by bolts 127. Screw holes are provided in the convex mounting base 123 and the concave mounting base 124.
[0056] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A ring current sensor, characterized by Includes sensor coil, housing, and multiple limit plates; The housing is an openable annular structure, and the sensor coil is disposed inside the housing; The limiting plate is fixed to the inner wall of the housing by a column connecting rod; The limiting plate is covered with anti-slip rubber.
2. The ring current sensor of claim 1, wherein, The internal structure of the column connecting rod includes a rotatable shaft and a return spring. The rotatable shaft fixes both ends of the return spring; The limiting plate is connected to the rotatable shaft via a clamp.
3. The toroidal current sensor of claim 2, wherein, When the housing is in the open state, the limiting plate is in the naturally closed state; when the housing is in the fastened state, the limiting plate is abutted by the overhead wire and rotates axially inward, and the return spring provides the limiting plate with a force for axial rotation outward.
4. The ring current sensor according to any one of claims 1 to 3, characterized in that The sensor coil consists of a hollow PCB frame and copper enameled wire wound on the hollow PCB frame.
5. The ring current sensor according to any one of claims 1 to 3, characterized in that The housing is made of a malleable flame-retardant material, and the gap between the housing and the sensor coil is filled with an insulating filler.
6. The ring current sensor according to any one of claims 1 to 3, characterized in that The housing includes a first sub-housing and a second sub-housing; The first sub-shell is provided with a convex mounting base at its first end, and the second sub-shell is provided with a concave mounting base at its first end. The second end of the first sub-shell is provided with a positioning block, and the second end of the second sub-shell is provided with a positioning groove; After the first sub-shell and the second sub-shell are engaged, the convex mounting base is aligned with the concave mounting base, and the positioning block is aligned with the positioning groove.
7. The ring current sensor according to any one of claims 1 to 3, characterized in that The sensor coil includes a first sub-coil and a second sub-coil; The first sub-coil has a coil lead hole at its end, and the second sub-coil has a coil lead at its end. After the annular current sensor is engaged, the coil lead is inserted into the corresponding coil lead hole, so that the first sub-coil and the second sub-coil form a complete circuit.
8. The ring current sensor according to any one of claims 1 to 3, characterized in that An explosion-proof connector is provided on the outside of the housing, and the signal output line is connected to the sensor coil through the explosion-proof connector.
9. The toroidal current sensor of claim 6, wherein, After the first sub-shell and the second sub-shell are fastened together, the first sub-shell and the second sub-shell are fixed by bolts, and the screw holes are provided in the convex mounting base and the concave mounting base.
10. The toroidal current sensor of claim 6, wherein, The overhead conductor is fitted with a PTFE tube accessory, and the two ends of the PTFE tube accessory are fixed with insulating plastic clamps. The ring-shaped current sensor is fastened to the outside of the PTFE tube accessory.