Rogowski coil and current measuring device

Abstract

The application relates to a Rogowski coil and a current measuring device. The Rogowski coil comprises a coil body and a joint assembly; the joint assembly comprises a first joint piece, a second joint piece and an adhesive layer; the first joint piece comprises a fixed main body and a first protruding part; the fixed main body is provided with a first fixed hole; one end of the coil body is inserted into the first fixed hole and is in contact with the first protruding part; the coil body is spaced apart from the inner wall of the first fixed hole and forms a first cavity; and the first cavity is provided with the adhesive layer; the second joint piece comprises a joint main body and a second protruding part; the joint main body is provided with a second fixed hole; one end of the coil body, which is away from the fixed main body, is inserted into the second fixed hole and is in contact with the second protruding part; the coil body is spaced apart from the inner wall of the second fixed hole and forms a second cavity; and the second cavity is provided with the adhesive layer. The Rogowski coil is easy to assemble, the connection between the joint assembly and the coil body is reliable and high, and the risk of loosening is small.

Description

Technical Field

[0001] This application relates to the field of current measurement technology, and in particular to a Rogowski coil and a current measuring device. Background Technology

[0002] The Rogowski coil is a current measurement sensing unit that has advantages such as wide measurement range, no magnetic saturation phenomenon, good insulation and wide bandwidth, and is widely used in various current measurement devices.

[0003] Some Rogowski coils include a coil body and a connector assembly. The coil body is used to fit around the outer periphery of the conductor being measured. The connector assembly includes two detachable connectors, which are respectively connected to both ends of the coil body. By setting the detachable connection of the two connectors, the coil body can be opened or closed to facilitate fitting the coil body around the outer periphery of the conductor being measured.

[0004] However, in the Rogowski coils of the related technologies, the assembly of the coil body and the connector is difficult, and the connector and the coil body are prone to loosening, resulting in low reliability of the connection between the coil body and the connector assembly. Utility Model Content

[0005] Therefore, it is necessary to provide a Rogowski coil that is easy to assemble and has a highly reliable connection between the connector assembly and the coil body with a low risk of loosening, in order to address the above problems.

[0006] Therefore, it is necessary to provide another current measuring device that is easy to manufacture and has good production quality to address the above problems.

[0007] On the one hand, a Rogowski coil is provided, comprising:

[0008] A coil body, the coil body being fitted around the outer periphery of the conductor being measured; and

[0009] A connector assembly, comprising a first connector member, a second connector member, and an adhesive layer, wherein the first connector member and the second connector member are detachably connected.

[0010] The first connector includes a fixing body and a first protrusion. The fixing body is provided with a first fixing hole. The first protrusion protrudes from the inner wall of the first fixing hole. One end of the coil body is inserted into the first fixing hole and contacts the first protrusion. The coil body and the inner wall of the first fixing hole are spaced apart to form a first cavity. The first cavity is provided with the adhesive layer.

[0011] The second connector includes a connector body and a second protrusion. The connector body is provided with a second fixing hole. The second protrusion protrudes from the inner wall of the second fixing hole. The end of the coil body away from the fixing body is inserted into the second fixing hole and contacts the second protrusion. The coil body and the inner wall of the second fixing hole are spaced apart to form a second cavity. The adhesive layer is provided in the second cavity.

[0012] In one embodiment, at least two first protrusions are provided, the at least two first protrusions are spaced apart, and a first cavity is formed between two adjacent first protrusions;

[0013] And / or, at least two second protrusions are provided, the at least two second protrusions are spaced apart, and a second cavity is formed between two adjacent second protrusions.

[0014] In one embodiment, when at least two first protrusions are provided, there is a gap between the first protrusion and the coil body, and the gap connects two adjacent first cavities;

[0015] And / or, when at least two of the first protrusions are provided, there is a gap between the second protrusion and the coil body, the gap connecting two adjacent second cavities.

[0016] In one embodiment, when at least two first protrusions are provided, a first connecting portion is provided on the first protrusion, and the first connecting portion connects two adjacent first cavities;

[0017] When there are at least two second protrusions, the second protrusions are provided with a second connecting portion, and the second connecting portion connects two adjacent second cavities.

[0018] In one embodiment, the first fixing hole is a blind hole, and the length direction of the first protrusion is parallel to the direction from the opening end of the first fixing hole to the closed end of the first fixing hole.

[0019] And / or, the second fixing hole is a blind hole, and the length of the second protrusion is parallel to the direction from the opening end of the second fixing hole to the closed end of the second fixing hole.

[0020] In one embodiment, the first connector further includes a connector detachably connected to the connector body. The connector has an accommodating space inside, and one end of the connector has a through hole communicating with the accommodating space. At least a portion of the fixing body is disposed in the accommodating space, and one end of the coil body away from the connector body passes through the through hole and is inserted into the first fixing hole.

[0021] In one embodiment, the connector body includes a fixing part and a connecting part connected to one end of the fixing part, the fixing part is provided with a second fixing hole, and the connecting part is threadedly connected to the connector.

[0022] In one embodiment, the end of the connector connected to the connecting part is provided with an opening communicating with the accommodating space, forming an open end. The inner sidewall of the accommodating space is provided with an internal thread section, and the outer peripheral side of the connector is provided with an external thread section that mates with the internal thread. The connector is inserted into the accommodating space.

[0023] In one embodiment, one end of the fixing body protrudes from the connector toward the second connector, and the connecting portion is provided with a receiving hole communicating with the open end. The end of the fixing body protruding from the connector passes through the open end and is inserted into the receiving hole.

[0024] In one embodiment, the connector includes a connecting body and a first protruding ring connected to the connecting body. The connecting body has the accommodating space inside. The first protruding ring is disposed at one end of the connecting body away from the second connector. At least a portion of the first protruding ring protrudes into the interior of the accommodating space, and the through hole is formed inside the first protruding ring.

[0025] The first connector further includes a second protruding ring surrounding the outer periphery of the fixing body. The second protruding ring is disposed at the end of the fixing body away from the second connector and is used to abut against the first protruding ring.

[0026] On the other hand, a current measuring device is also provided, including a circuit board, a connecting cable and the aforementioned Rogowski coil, wherein one end of the connecting cable is connected to the coil body of the Rogowski coil and the other end is connected to the circuit board.

[0027] In one embodiment, one end of the connecting cable away from the circuit board is inserted into the second fixing hole, and the adhesive layer is provided between the connecting cable and the inner wall of the second fixing hole.

[0028] The aforementioned Rogowski coil, due to the presence of the protrusions, allows both ends of the coil body to be positioned in corresponding fixing holes. This facilitates the injection of liquid adhesive between the coil body and the inner wall of the fixing hole, ensuring that both ends of the coil body are fixed to the two connectors one-to-one. This reduces the difficulty of assembling the coil body and connectors, improving the manufacturing efficiency of the Rogowski coil. Furthermore, the first cavity formed by the spaced-apart space between the coil body and the inner wall of the first fixing hole, and the second cavity formed by the spaced-apart space between the coil body and the inner wall of the second fixing hole, allow the adhesive layer to be accommodated. Under the action of the adhesive layer, both ends of the coil body are firmly connected to the two connectors one-to-one, improving the connection reliability between the connector assembly and the coil body and reducing the risk of loosening. Attached Figure Description

[0029] Figure 1 This is a perspective view of an angle of a Rogowski coil in some embodiments of this application.

[0030] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0031] Figure 3 This is a perspective view of the Rogowski coil from another angle in some embodiments of this application.

[0032] Figure 4 for Figure 3 Enlarged view of section B in the middle.

[0033] Figure 5 This is a cross-sectional view of the coil body in some embodiments.

[0034] Figure 6 This is a structural diagram of the connector assembly at one angle in some embodiments.

[0035] Figure 7 This is an exploded view of the connector assembly in some embodiments.

[0036] Figure 8 This is a perspective view of the fastener at one angle in some embodiments.

[0037] Figure 9 This is a perspective view of the fastener from another angle in some embodiments.

[0038] Figure 10 This is a structural diagram of the second connector at one angle in some embodiments.

[0039] Figure 11 This is a structural diagram of a connector assembly in some implementations from another angle.

[0040] Figure 12 for Figure 11A cross-sectional view along the CC direction.

[0041] Figure 13 This is a perspective view of the connector in some embodiments.

[0042] Figure 14 This is a diagram showing the connection structure between the Rogowski coil and the connecting cable in some embodiments of this application.

[0043] In the picture:

[0044] 100. Rogowski coil; 200. Connecting cable; 1. Coil body; 11. Flexible frame; 12. Coil assembly; 13. Insulation layer; 2. First connector; 21. Fixing member; 211. Fixing body; 2111. First fixing hole; 212. First protrusion; 213. Second protruding ring; 22. Connector; 221. Connecting body; 2211. Accommodating space; 2212. Internal thread section; 222. First protruding ring; 2221. Through hole; 3. Second connector; 31. Connector body; 311. Connecting part; 3111. External thread section; 3112. Accommodating hole; 312. Fixing part; 3121. Second fixing hole; 32. Second protrusion; 321. Second recess; 4. Adhesive layer. Detailed Implementation

[0045] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0046] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms 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.

[0047] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0048] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0049] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0050] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0051] The Rogowski coil is a current measurement sensing unit that has advantages such as wide measurement range, no magnetic saturation phenomenon, good insulation and wide bandwidth, and is widely used in various current measurement devices.

[0052] See Figure 1 , Figure 2 , Figure 3 and Figure 4 , Figure 1A perspective view of an angle of a Rogowski coil is shown in some embodiments of this application; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 A perspective view of the Rogowski coil from another angle is shown in some embodiments of this application; Figure 4 for Figure 3 Enlarged view at point B. This application provides a Rogowski coil 100, including a coil body 1 and a connector assembly. The coil body 1 is used to be sleeved on the outer periphery of the conductor being measured. (Combined with...) Figure 5 , Figure 5 Cross-sectional views of the coil body in some embodiments are shown. The coil body 1 is generally flexible and includes a flexible skeleton 11, a coil assembly 12 wound around the outer periphery of the flexible skeleton 11, and an insulating layer 13 surrounding the outer periphery of the coil assembly 12. In this embodiment, the flexible skeleton 11 is made of a non-ferromagnetic material; for example, the flexible skeleton 11 is silicone. Figure 6 , Figure 6 A structural diagram of a connector assembly from one angle is shown in some embodiments. The connector assembly includes a first connector 2, a second connector 3, and an adhesive layer 4. The first connector 2 and the second connector 3 are detachably connected. Figure 7 and Figure 8 , Figure 7 Exploded views of the connector assembly in some embodiments are shown. Figure 8 A perspective view of the fixing member from one angle is shown in some embodiments. The first connector 2 includes a fixing body 211 and a first protrusion 212. The fixing body 211 is provided with a first fixing hole 2111. The first protrusion 212 protrudes from the inner wall of the first fixing hole 2111. One end of the coil body 1 is inserted into the first fixing hole 2111 and contacts the first protrusion 212. The coil body 1 and the inner wall of the first fixing hole 2111 are spaced apart to form a first cavity. The first cavity is provided with an adhesive layer 4. Figure 7 and Figure 10 , Figure 10 The diagram illustrates the structure of a second connector at one angle in some embodiments. The second connector 3 includes a connector body 31 and a second protrusion 32. The connector body 31 has a second fixing hole 3121. The second protrusion 32 protrudes from the inner wall of the second fixing hole 3121. One end of the coil body 1, away from the fixing body 211, is inserted into the second fixing hole 3121 and contacts the second protrusion 32. The coil body 1 and the inner wall of the second fixing hole 3121 are spaced apart to form a second cavity. An adhesive layer 4 is disposed in the second cavity. It should be noted that the adhesive layer 4 in this application is formed by curing a liquid adhesive.

[0053] In actual implementation, liquid adhesive is injected into the first cavity and the second cavity, and the adhesive layer 4 is formed after the liquid adhesive cures.

[0054] A first fixing hole 2111 is provided in the fixing body 211 of the first connector 2. Since the first protrusion 212 protrudes from the inner wall of the first fixing hole 2111, one end of the coil body 1 is inserted into the first fixing hole 2111 and contacts the first protrusion 212. Under the action of the friction between the first protrusion 212 and the coil body 1, the first protrusion 212 can position the coil body 1, making it difficult for the coil body 1 to come out of the first fixing hole 2111. A second fixing hole 3121 is provided in the connector body 31 of the second connector 3. Since the second protrusion 32 protrudes from the inner wall of the second fixing hole 3121, one end of the coil body 1 away from the fixing body 211 is inserted into the inner wall of the second fixing hole 3121 and contacts the second protrusion 32. Under the action of the friction between the second protrusion 32 and the coil body 1, the second protrusion 32 can position the coil body 1, making it difficult for the coil body 1 to come out of the second fixing hole 3121. The presence of the protrusions allows the two ends of the coil body 1 to be positioned in corresponding fixing holes, facilitating the injection of liquid adhesive between the coil body 1 and the inner wall of the fixing hole. This ensures that the two ends of the coil body 1 are fixed to the two connectors one-to-one, reducing the difficulty of assembling the coil body 1 and the connectors and improving the manufacturing efficiency of the Rogowski coil 100. Furthermore, the coil body 1 and the inner wall of the first fixing hole 2111 are spaced apart to form a first cavity, and the coil body 1 and the inner wall of the second fixing hole 3121 are spaced apart to form a second cavity. The adhesive layer 4 can be accommodated in both cavities. Under the action of the adhesive layer 4, the two ends of the coil body 1 are firmly connected to the two connectors one-to-one, improving the connection reliability between the connector assembly and the coil body 1 and reducing the risk of loosening.

[0055] In some embodiments, see Figure 1 , Figure 2 and Figure 8 At least two first protrusions 212 are provided, and the at least two first protrusions 212 are spaced apart, with a first cavity formed between two adjacent first protrusions 212. (See also...) Figure 3 , Figure 4 and Figure 9 At least two second protrusions 32 are provided, spaced apart, and a second cavity is formed between adjacent second protrusions 32. With this design, when the coil body 1 is inserted into the fixing hole, at least two protrusions in the same fixing hole contact the coil body 1, which helps to increase the frictional force on the coil body 1 and further reduces the risk of the coil body 1 detaching from the fixing hole. Because adjacent protrusions are spaced apart and a cavity is formed between them, the adhesive layer 4 can be more evenly distributed in the fixing hole, increasing the bonding area between the coil body 1 and the connector and improving the firmness of the connection between the coil body 1 and the connector.

[0056] For example, four of each of the first protrusion 212 and the second protrusion 32 may be provided. Of course, in other examples, the number of either the first protrusion 212 or the second protrusion 32 may be adjusted according to actual needs, such as setting the number of the first protrusion 212 to one, two, three or five, and the number of the second protrusion 32 to one, two, three or five, etc. There is no specific limitation on the number of the first protrusion 212 and the second protrusion 32 here.

[0057] It is understandable that, due to surface roughness or machining precision of the first protrusion 212 and the second protrusion 32, the first protrusion 212 and the coil body 1 are usually not tightly connected, that is, when the protrusions and the coil body 1 come into contact, there will be a certain gap between them.

[0058] In some embodiments, see Figure 2 When at least two first protrusions 212 are provided, there is a gap between the first protrusions 212 and the coil body 1, and the gap connects two adjacent first cavities. (See reference...) Figure 4 When at least two first protrusions 212 are provided, there is a gap between the second protrusion 32 and the coil body 1, and the gap connects two adjacent second cavities. Through the gap between the protrusion and the coil body 1, the liquid adhesive can flow between the two adjacent cavities, allowing each cavity to be evenly filled with liquid adhesive. This results in a smoother adhesive layer 4 formed by the cured liquid adhesive. Furthermore, some of the liquid adhesive can fill the gap, and the cured liquid adhesive in the gap forms the adhesive layer 4, which can firmly bond the protrusion to the coil body 1, making the connection between the coil body 1 and the connector more secure.

[0059] In some embodiments, when at least two first protrusions 212 are provided, each first protrusion 212 has a first connecting portion that connects two adjacent first cavities. The first connecting portion can be a first connecting hole penetrating the first protrusion 212, or it can be a first recess on the side of the first protrusion 212 facing the coil body 1. When the first recess is provided on the side of the first protrusion 212 facing the coil body 1, the presence of the first recess creates an uneven structure on that side. Specifically, the portion of the first protrusion 212 near the first recess on the side facing the coil body 1 is more protruding and contacts the coil body 1, while the inner wall of the first recess does not contact the coil body 1. Therefore, a gap is formed between the inner wall of the first recess and the coil body 1, and this gap connects to the two adjacent first cavities. When at least two second protrusions 32 are provided, each second protrusion 32 has a second connecting portion that connects two adjacent second cavities. The second connecting portion can be a second connecting hole penetrating the second protrusion 32, or it can be a second recess located on the side of the second protrusion 32 facing the coil body 1. When the second recess is located on the side of the second protrusion 32 facing the coil body 1, the presence of the second recess creates an uneven structure on that side. Specifically, the portion of the second protrusion 32 near the second recess on the side facing the coil body 1 is more convex, and this convex portion contacts the coil body 1. However, the inner wall of the second recess does not contact the coil body 1, thus creating a gap between the inner wall of the second recess and the coil body 1. This gap connects to two adjacent second cavities. The connecting portion allows adjacent cavities to communicate with each other, facilitating the injection of liquid adhesive. Furthermore, the liquid adhesive can flow from one cavity to another through the connecting portion, promoting uniform distribution of the liquid adhesive in each cavity and improving the smoothness of the adhesive layer 4. Even when the protrusion presses against the coil body 1, resulting in no gap between the protrusion and the coil body 1, the presence of the connecting part allows two adjacent cavities to communicate with each other.

[0060] In some embodiments, see Figure 8 , Figure 11 and Figure 12 , Figure 11 This shows a structural diagram of the connector assembly from another angle in some implementations; Figure 12 for Figure 11In the cross-sectional view along the CC direction, the first fixing hole 2111 is a blind hole, and the length direction of the first protrusion 212 is parallel to the direction from the opening end of the first fixing hole 2111 to the closed end of the first fixing hole 2111. The second fixing hole 3121 is also a blind hole, and the length direction of the second protrusion 32 is parallel to the direction from the opening end of the second fixing hole 3121 to the closed end of the second fixing hole 3121. Since the length direction of the protrusion is parallel to the direction from the opening end of the fixing hole to the closed end of the fixing hole, the protrusion can guide the insertion of the coil body 1 into the fixing hole. In addition, by setting the fixing hole as a blind hole, the closed end of the blind hole can block the liquid adhesive, allowing the liquid adhesive to accumulate in the fixing hole, which is beneficial for pouring the liquid adhesive. In other embodiments, the first fixing hole 2111 or the second fixing hole 3121 can also be set as a through hole 2221 as needed.

[0061] See Figure 7 and Figure 12 The first connector 2 also includes a fixing member 21 and a connecting member 22 that is detachably connected to the connector body 31. Figure 13 The connector 22 has an internal accommodating space 2211, and one end of the connector 22 has a through hole 2221 communicating with the accommodating space 2211. The fixing member 21 includes a fixing body 211 and a first protrusion 212. At least a portion of the fixing body 211 is disposed in the accommodating space 2211. The end of the coil body 1 away from the connector body 31 passes through the through hole 2221 and is inserted into the first fixing hole 2111. The fixing member 21 is mainly used to fix the coil body 1, and the connector 22 is mainly used to achieve a detachable connection with the second connector 3. When the connector 22 is connected to the connector body 31, it can restrict the movement of the fixing member 21 relative to the second connector 3, thereby forming a closed-loop structure of the Rogowski coil 100.

[0062] For example, see [link to relevant documentation]. Figure 7 and Figure 12 The connector body 31 includes a fixing part 312 and a connecting part 311 connected to one end of the fixing part 312. The fixing part 312 is provided with a second fixing hole 3121, and the connecting part 311 is threadedly connected to the connector 22. The second fixing hole 3121 in the fixing part 312 provides space for the connection of the coil body 1 on the connector body 31. The threaded connection between the connecting part 311 and the connector 22 facilitates the disassembly and assembly of the first connector 2 and the second connector 3, and when the connecting part 311 and the connector 22 are connected together, the connecting part 311 is less likely to loosen the connector 22.

[0063] Continue reading Figure 7 and Figure 12One end of the connector 22 connected to the connecting part 311 has an opening communicating with the accommodating space 2211, forming an open end. The inner sidewall of the accommodating space 2211 has an internal thread section 2212, and the outer periphery of the connecting part 311 has an external thread section 3111 that engages with the internal thread. The connecting part 311 is inserted into the accommodating space 2211. In actual implementation, the connector 22 can rotate relative to the fixing member 21 and the coil body 1. By rotating the connector 22, the internal thread section 2212 in the connector 22 connects with the external thread section 3111 of the fixing part 312, thereby locking the fixing member 21 between the connector 22 and the second connector 3, realizing a detachable connection between the first connector 2 and the second connector 3.

[0064] Continue reading Figure 7 and Figure 12 To improve the compactness of the connector assembly, one end of the fixing body 211 protrudes from the connector 22 towards the second connector 3. The connecting part 311 is provided with a receiving hole 3112 communicating with the open end. The end of the fixing body 211 protruding from the connector 22 passes through the open end and is inserted into the receiving hole 3112, so that part of the fixing member 21 can be accommodated in the connecting part 311.

[0065] In some embodiments, see Figure 7 , Figure 8 , Figure 9 and Figure 12 The connector 22 includes a connecting body 221 and a first protruding ring 222 connected to the connecting body 221. The connecting body 221 has an accommodating space 2211 inside. The first protruding ring 222 is located at the end of the connecting body 221 away from the second connector 3. At least a portion of the first protruding ring 222 protrudes from the interior of the accommodating space 2211, and a through hole 2221 is formed inside the first protruding ring 2222. The fixing member also includes a second protruding ring 213 surrounding the outer periphery of the fixing body 211. The second protruding ring 213 is located at the end of the fixing body 211 away from the second connector 3 and is used to abut against the first protruding ring 222. It is understood that when the connector 22 is connected to the connecting portion 311 of the connector body 31, one end of the fixing member 21 abuts against the end of the connector 22 with the through hole 2221. A first protruding ring 222 is provided at the end of the connecting body 221 away from the second connector 3, and a second protruding ring 213 is provided at the end of the fixing body 211 away from the second connector 3. When the connector 22 is connected to the connector 22, the second protrusion 32 abuts against one side of the first protrusion 212 to prevent the fixing member 21 from passing through the through hole 2221 to the outside of the connector 22.

[0066] In some embodiments, see Figure 14Furthermore, a current measuring device is provided, including a circuit board (not shown in the figure), a connecting cable 200, and a Rogowski coil 100 of any of the above-described structures. The connecting cable 200 is electrically connected to the coil body 1 of the Rogowski coil 100 and the circuit board respectively. The circuit board has a measuring circuit. Specifically, when measuring current, the coil body 1 is fitted onto the outer periphery of the conductor to be measured, and then the internal thread section 2212 of the connector 22 is connected to the external thread section 3111 of the connector 311, so that the conductor to be measured passes through the measuring hole of the Rogowski coil 100. The current on the conductor to be measured induces a voltage on the coil body 1, and the measuring circuit calculates the magnitude of the current on the conductor to be measured based on the voltage. With the presence of the first protrusion 212 and the second protrusion 32, this current measuring device facilitates the assembly of the two ends of the coil body 1 into the first connector 2 and the second connector 3 respectively, reducing the assembly difficulty of the coil assembly 12 pieces and the connector assembly, and is beneficial to the production and manufacturing of the current measuring device. In addition, the adhesive layer 4 ensures that the two ends of the coil body 1 are firmly bonded to the fixing body 211 and the second connector 3, reducing the risk of the coil body 1 and the connector becoming loose and improving the production quality of the current measuring device.

[0067] In order to fix the connecting cable 200 and the Rogowski coil 100 together, one end of the connecting cable 200 is inserted into the second fixing hole 3121. An adhesive layer 4 is provided between the connecting cable 200 and the inner wall of the second fixing hole 3121. The adhesive layer 4 makes the connecting cable 200 firmly attached to the second fixing hole 3121, preventing the connecting cable 200 from becoming loose from the second connector 3 of the Rogowski coil 100.

[0068] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0069] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A Rogowski coil, characterized in that, include: A coil body, which is used to be sleeved on the outer periphery of the conductor being measured; and A connector assembly, comprising a first connector member, a second connector member, and an adhesive layer, wherein the first connector member and the second connector member are detachably connected. The first connector includes a fixing body and a first protrusion. The fixing body is provided with a first fixing hole. The first protrusion protrudes from the inner wall of the first fixing hole. One end of the coil body is inserted into the first fixing hole and contacts the first protrusion. The coil body and the inner wall of the first fixing hole are spaced apart to form a first cavity. The first cavity is provided with the adhesive layer. The second connector includes a connector body and a second protrusion. The connector body is provided with a second fixing hole. The second protrusion protrudes from the inner wall of the second fixing hole. The end of the coil body away from the fixing body is inserted into the second fixing hole and contacts the second protrusion. The coil body and the inner wall of the second fixing hole are spaced apart to form a second cavity. The adhesive layer is provided in the second cavity.

2. The Rogowski coil according to claim 1, characterized in that, The first protrusion is provided in at least two, and the at least two first protrusions are distributed at intervals, with a first cavity formed between two adjacent first protrusions; And / or, at least two second protrusions are provided, the at least two second protrusions are spaced apart, and a second cavity is formed between two adjacent second protrusions.

3. The Rogowski coil according to claim 2, characterized in that, When at least two first protrusions are provided, there is a gap between the first protrusion and the coil body, and the gap connects two adjacent first cavities; And / or, when at least two of the first protrusions are provided, there is a gap between the second protrusion and the coil body, the gap connecting two adjacent second cavities.

4. The Rogowski coil according to claim 2, characterized in that, When there are at least two first protrusions, a first connecting portion is provided on the first protrusion, and the first connecting portion connects two adjacent first cavities. When there are at least two second protrusions, the second protrusions are provided with a second connecting portion, and the second connecting portion connects two adjacent second cavities.

5. The Rogowski coil according to any one of claims 1 to 4, characterized in that, The first fixing hole is a blind hole, and the length direction of the first protrusion is parallel to the direction from the opening end of the first fixing hole to the closed end of the first fixing hole; And / or, the second fixing hole is a blind hole, and the length of the second protrusion is parallel to the direction from the opening end of the second fixing hole to the closed end of the second fixing hole.

6. The Rogowski coil according to any one of claims 1 to 4, characterized in that, The first connector further includes a connector that is detachably connected to the connector body. The connector has an internal accommodating space, and one end of the connector has a through hole communicating with the accommodating space. At least a portion of the fixing body is disposed in the accommodating space, and the end of the coil body away from the connector body passes through the through hole and is inserted into the first fixing hole.

7. The Rogowski coil according to claim 6, characterized in that, The connector body includes a fixing part and a connecting part connected to one end of the fixing part. The fixing part is provided with a second fixing hole, and the connecting part is threadedly connected to the connector.

8. The Rogowski coil according to claim 7, characterized in that, The connector has an opening at one end that is connected to the connecting part, which communicates with the accommodating space, forming an open end. The inner sidewall of the accommodating space is provided with an internal thread section, and the outer periphery of the connector is provided with an external thread section that mates with the internal thread section. The connector is inserted into the accommodating space.

9. The Rogowski coil according to claim 8, characterized in that, One end of the fixing body protrudes from the connector toward the second connector, and the connecting part is provided with a receiving hole communicating with the open end. The end of the fixing body protruding from the connector passes through the open end and is inserted into the receiving hole.

10. The Rogowski coil according to claim 8, characterized in that, The connector includes a connecting body and a first protruding ring connected to the connecting body. The receiving space is provided inside the connecting body. The first protruding ring is located at the end of the connecting body away from the second connector. At least a portion of the first protruding ring protrudes into the receiving space, and the through hole is formed inside the first protruding ring. The first connector further includes a second protruding ring surrounding the outer periphery of the fixing body. The second protruding ring is disposed at the end of the fixing body away from the second connector, and the second protruding ring abuts against the first protruding ring.

11. A current measuring device, characterized in that, The device includes a circuit board, a connecting cable, and a Rogowski coil as described in any one of claims 1 to 10, wherein one end of the connecting cable is connected to the coil body of the Rogowski coil, and the other end is connected to the circuit board.

12. The current measuring device according to claim 11, characterized in that, One end of the connecting cable away from the circuit board is inserted into the second fixing hole, and the adhesive layer is provided between the connecting cable and the inner wall of the second fixing hole.

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