Limitable current sensor

Abstract

The utility model discloses a current sensor capable of limiting, which comprises a cylinder body, an induction channel is formed on the inner wall of the cylinder body, and a cable penetrates through the induction channel; the limiting assemblies are movably arranged on the inner wall of the barrel body, and each pair of limiting assemblies are arranged at intervals and symmetrically arranged on the two sides of the central axis of the barrel body; when the cable penetrates through the induction channel, the limiting assemblies move in the direction away from the central axis of the barrel, so that the cable is surrounded by the at least two pairs of limiting assemblies and limited in the center of the induction channel. According to the utility model, the at least two pairs of symmetrically distributed limiting assemblies are arranged on the inner wall of the cylinder body as the sensor main body, and the at least two pairs of limiting assemblies surround the cable from different directions and limit the cable in the center of the cylinder body, so that the installation position of the current sensor on the cable is ensured; the center line of the current sensor and the center line of the measured cable coincide with each other, and the measurement precision of the sensor is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of current sensors, and particularly relates to a current sensor with a limit function. Background Art

[0002] High-voltage cables are one of the important components for power transmission and distribution. It is necessary to rely on them to complete the long-distance transmission of electric energy. Especially for industrial and mining enterprises, high-voltage cables start from the power distribution room and are connected to various large electrical facilities through cable trenches. For high-voltage cables with long lines, installing current sensors on the cables can help dispatchers timely understand the operating conditions of the cables.

[0003] Most of the current sensors in current use mostly adopt a ring structure, such as Rogowski coils, fiber optic current sensors, Hall current sensors, etc. The inner diameter of the current sensor often has to be larger than the diameter of the measured cable to better match different types of cables. When installing the current sensor, it is generally directly sleeved on the cable, that is to say, the installation position of the current sensor on the cable is randomly placed. For high-voltage cables at different positions, the cables may have horizontal, inclined, vertical and other angles of routing, which makes the installation position of the current sensor on the cable not fixed, affecting the stability of the current sensor, and further reducing the measurement accuracy of the current sensor. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide a current sensor with a limit function to solve the problem that the installation position of the current sensor in the prior art is not fixed, resulting in low measurement accuracy of the sensor.

[0005] To achieve the above object, the utility model provides a current sensor with a limit function for sleeving on a cable, including:

[0006] A cylinder, an induction channel is formed on the inner wall of the cylinder, and the cable passes through the induction channel;

[0007] At least two pairs of limit components, the limit components are movably arranged on the inner wall of the cylinder, and each pair of limit components is arranged at intervals and symmetrically on both sides of the central axis of the cylinder; when the cable passes through the induction channel, the limit components move in a direction away from the central axis of the cylinder, so that the cable is surrounded by at least two pairs of limit components and limited to the center of the induction channel.

[0008] Optionally, an elastic member is included, the elastic member is arranged on the limit component, and the elastic member is used to make the limit component automatically return to its original position. When the limit component moves, the elastic member undergoes elastic deformation, so that at least two pairs of limit components automatically return to their original positions and clamp the cable.

[0009] Optionally, the limiting component includes a rotating shaft and a limiting plate. The rotating shaft is provided on the inner wall of the cylinder body. The rotating shaft is provided with the elastic member. The limiting plate is movably connected to the elastic member. The limiting plate can rotate around the rotating shaft in a direction away from the central axis of the cylinder body. The elastic member is used to return the limiting plate to its original position.

[0010] Optionally, the rotating shaft includes a hollow shaft body and a rotating rod. The rotating rod is provided inside the shaft body. The elastic member is a return spring. Both ends of the return spring are fixed to both ends of the rotating rod. Bumps are respectively provided at both ends of the limiting plate along the extending direction of the rotating shaft. The limiting plate is connected to the rotating rod through the bumps.

[0011] Optionally, an anti-slip member is provided on the surface of the limiting plate facing the cable.

[0012] Optionally, the anti-slip member is an anti-slip rubber strip. A plurality of the anti-slip rubber strips protrude from the surface of the limiting plate facing the cable. The plurality of anti-slip rubber strips are arranged at intervals along the axial direction of the cylinder body on one surface of the limiting plate.

[0013] Optionally, a cable tie is sleeved on the cable. A hook rope is provided on the limiting plate. The hook rope is used to connect the cable tie.

[0014] Optionally, the cylinder body includes a separable first cylinder body and a second cylinder body. The first cylinder body and the second cylinder body are arranged opposite to each other and form the induction channel. A sensor connecting wire is provided at the interval between the first cylinder body and the second cylinder body to electrically connect the first cylinder body and the second cylinder body. Each pair of the limiting components is respectively provided on the inner wall of the first cylinder body and the inner wall of the second cylinder body.

[0015] Optionally, the first cylinder body and the second cylinder body have the same shape and structure.

[0016] Optionally, the cylinder body is an aluminum alloy plate.

[0017] In the technical solution of the present utility model, the current sensor with limit function includes a cylinder body. The cylinder body has an induction channel for a cable to pass through. At least two pairs of limit components are provided on the inner wall of the cylinder body. Taking the central axis of the cylinder body as the boundary, the two pairs of limit components are symmetrically arranged on both sides of the central axis. When the cable passes through the induction channel, the two pairs of limit components give way and surround the cable so that the cable is limited at the center of the current sensor with limit function. It can be understood that in this technical solution, the cable is limited by the cooperation of at least two pairs of limit components. The at least two pairs of limit components are symmetrically and parallelly arranged on both sides of the central axis of the cylinder body, so that the at least two pairs of limit components surround and limit the cable from multiple directions, thereby making the central line of the current sensor with limit function coincide with the central line of the measured cable, ensuring that the cable is always at the center of the current sensor with limit function, and improving the current measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0019] Figure 1 It is a schematic structural diagram of a current sensor with limit function in an embodiment of the present utility model;

[0020] Figure 2 It is a cross-sectional view of a limit component in an embodiment of the present utility model;

[0021] Figure 3 It is a top view of the current sensor with limit function installed on a cable in an embodiment of the present utility model;

[0022] Figure 4 It is a schematic structural diagram of the current sensor with limit function installed on a cable in an embodiment of the present utility model.

[0023] Description of the reference numerals in the drawings:

[0024]

[0025]

[0026] The realization of the object, functional features and advantages of the present utility model will be further described with reference to the embodiments and the drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] The main purpose of the utility model is to provide a limitable current sensor 100 to solve the problem of low measurement accuracy of current sensors in the prior art.

[0030] See also Figures 1 to 4 In one embodiment of the utility model, a limitable current sensor 100 includes a cylinder, an inner wall of which is formed with a sensing channel, and a cable is passed through the sensing channel; at least two pairs of limit assemblies are movably arranged on the inner wall of the cylinder, and each pair of limit assemblies are arranged at intervals and symmetrically on both sides of the central axis of the cylinder; when the cable passes through the sensing channel, the limit assemblies move in a direction away from the central axis of the cylinder, so that the cable is surrounded by at least two pairs of limit assemblies and limited to the center of the sensing channel.

[0031] In the technical solution of the utility model, the limitable current sensor includes a cylinder 110, the cylinder 110 has a sensing channel 110a for the cable 200 to pass through, and the inner wall of the cylinder 110 is provided with at least two pairs of limit assemblies 120, with the central axis of the cylinder 110 as the boundary, and the two pairs of limit assemblies 120 are symmetrically arranged on both sides of the central axis. When the cable 200 passes through the sensing channel 110a, the two pairs of limit assemblies 120 give way and surround the cable 200 so that the cable 200 is limited to the center of the limitable current sensor 100. It can be understood that the present technical solution limits the cable 200 by cooperating with at least two pairs of limit assemblies 120. At least two pairs of limit assemblies 120 are symmetrically and parallelly arranged on both sides of the central axis of the cylinder 110, so that at least two pairs of limit assemblies 120 surround and limit the cable 200 from multiple directions, thereby making the center line of the limitable current sensor 100 coincide with the center line of the cable under test, ensuring that the cable 200 is always in the center of the limitable current sensor 100, thereby improving the current measurement accuracy.

[0032] Specifically, in this embodiment, an induction channel 110a for passing through the cable 200 is formed on the inner wall of the cylinder body 110. The central axis of the cylinder body 110 coincides with the central axis of the induction channel 110a. Two pairs of limiting components 120 are provided on the inner wall of the cylinder body 110, that is, four limiting components 120. The four limiting components 120 are symmetrically arranged on both sides of the central axis of the cylinder body 110 with the central axis of the cylinder body 110 as the dividing line. There is a certain interval between the limiting components 120 on the same side, forming a structure similar to a double-push door. By setting two pairs of limiting components 120, the cable 200 can be limited from at least four directions to surround and confine the cable 200 at the center of the cylinder body 110. It can be understood that the two pairs of limiting components 120 located on both sides of the central axis are parallel to each other in the initial state. When installing the cable 200, the cable 200 passes through the induction channel 110a. The four limiting components 120 first give way and then surround the cable 200. The limiting components can be fixed by an automatic return mechanism or manually. The automatic fixing method can be fixed by using a method that can generate a reaction force such as an elastic member, and the manual fixing method can be locked by using fixing methods such as using a buckle, a pin, a screw, etc., so that the limitable current sensor 100 can be firmly fixed on the cable 200, and the central axis of the limitable current sensor 100 coincides with the central axis of the cable 200. Compared with the current sensor installed randomly in the prior art, the technical solution of the present application limits the current sensor, making its central axis coincide with the central axis of the measured cable 200, greatly improving the output efficiency of the energy-taking coil. It should be noted that the limiting components 120 are parallel and symmetric to each other. At the same time, the end faces of the limiting components 120 in contact with the cable 200 also need to be parallel to the outer wall of the cable 200. Such a setting can ensure that the contact area between each limiting component 120 and the cable 200 is equal, that is, the cable 200 receives consistent binding forces from different directions, ensuring that the central axis of the limitable current sensor 100 coincides with the central axis of the measured cable 200.

[0033] Furthermore, the cylinder body 110 of this embodiment is a hollow cylindrical cylinder body. The cylinder body 110 adopts a cylindrical shape and presents as a ring as a whole, having an outer wall and an inner wall. The cable 200 is threaded through the center of the cylinder body 110, that is, the induction channel 110a, to generate an induction electric field with the device. With such a setting, on the one hand, the cylindrical cylinder body 110 helps to distribute the magnetic field more evenly, especially in the circumferential direction, which helps to improve the efficiency of electromagnetic induction, and the cylindrical design generally occupies less space and can utilize the space more effectively; on the other hand, the cylindrical cylinder body structure can reduce the edge effect. It can be understood that the edge effect varies with the corners and edges of the object, and the continuous curve of the cylinder can reduce this non-uniformity. Of course, in some other embodiments, the cylinder body 110 can also adopt the form of a prism, a cuboid, other irregular polygon structures, etc., which is specifically determined according to the actual situation and is not limited herein.

[0034] Of course, in some other embodiments, the number of the limiting components 120 is not limited to two pairs, but needs to be symmetrically arranged on both sides of the central axis of the cylinder body 110, so that the cable 200 is subjected to consistent constraints from two opposite directions. Therefore, four pairs, six pairs or other equal numbers of limiting components 120 can be arranged on the inner wall of the cylinder body 110 to fix the cable 200 from more directions and improve the installation effect of the current sensor 100 that can be limited. The effects and principles of setting different numbers of limiting components 120 are the same as those when setting two pairs, and will not be elaborated herein. The embodiments of the present utility model are not limited thereto, and all of the above are within the protection scope of the present utility model.

[0035] Furthermore, referring to Figures 1 to 4 , in an embodiment of the present utility model, it includes an elastic member 130. The elastic member 130 is arranged on the limiting component 120, and the elastic member 130 is used to make the limiting component 120 automatically return to its original position. When the limiting component 120 moves, the elastic member 130 undergoes elastic deformation, so that at least two pairs of limiting components 120 automatically return to their original positions and clamp the cable 200.

[0036] Specifically, in this embodiment, the elastic member 130 is arranged on the limiting component 120. When the limiting component 20 moves, the elastic member 130 will undergo elastic deformation and generate a reaction force, driving the limiting component 120 to return to its original position, and then clamping the cable 200. It can be understood that when the current sensor 100 that can be limited is installed on the cable 200, the limiting component 120 can automatically clamp the cable 200 due to the reaction force generated by the elastic member 130, improving the convenience of use of the device. At the same time, since the limiting components 120 are parallel and symmetrical to each other, the reaction forces received by each limiting component 120 during movement are basically the same in magnitude and the directions all point to the center line of the cable 200, ensuring that the center line of the current sensor 100 that can be limited coincides with the center line of the measured cable 200.

[0037] Further, referring to Figures 1 to 4 , in an embodiment of the present utility model, the limiting component 120 includes a rotating shaft 121 and a limiting plate 122. The rotating shaft 121 is provided on the inner wall of the cylinder 110. An elastic member 130 is provided on the rotating shaft 121. The limiting plate 122 is movably connected to the elastic member 130. The limiting plate 122 can rotate around the rotating shaft 121 in a direction away from the central axis of the cylinder 110. The elastic member 130 is used to return the limiting plate 122 to its original position.

[0038] Specifically, in this embodiment, the limiting component 120 realizes the limiting of the cable 200 by means of the combination of the rotating shaft 121 and the limiting plate 122. As Figure 1 shown, taking the central axis of the cylinder 110 as the midpoint, around this central axis, four rotating shafts 121 are evenly arranged on the inner wall of the cylinder 110. The elastic member 130 is provided on the rotating shaft 121. One side of the limiting plate 122 is connected to the rotating shaft 121. The four limiting plates 122 are parallel to each other in pairs and symmetrically arranged. It can be understood that the limiting plates 122 are initially in a parallel state. When the limiting plates 122 rotate outward around the rotating shaft 121, the elastic member 130 will generate a reaction force to make the limiting plates 122 rotate inward so as to return the limiting plates 122 to clamp the cable 200. During use, the current-limiting sensor 100 can be installed on the cable 200. The four limiting plates 122 rotate outward respectively, that is, away from the central axis of the cylinder 110, to give way to the cable 200. Then, due to the reaction force generated by the elastic member 130, the four limiting plates 122 rotate inward respectively to clamp the cable 200, so that the cable 200 is fixed at the central position of the current-limiting sensor 100. It should be noted that the limiting plates 122 and the cable 200 are parallel to each other, so that when the limiting plates 122 rotate inward, there is always a reaction force to make the limiting plates 122 return to their original positions. Of course, in some other embodiments, the movement mode of the limiting plates 122 can also adopt a non-rotating mode. For example, in one embodiment, a sliding groove can be opened on the inner wall of the cylinder 110, an elastic member 130 is arranged in the sliding groove, and the limiting plate 122 can slide in the sliding groove. When the current-limiting sensor 100 is installed on the cable 200, the limiting plate 122 moves along the sliding groove to be away from the cable 200. After installation, the elastic member 130 returns the limiting plate 122 to clamp the cable 200, so that the central axis of the current-limiting sensor 100 coincides with the central axis of the cable 200. The embodiments of the present utility model are not limited thereto, and the above are all within the protection scope of the present utility model.

[0039] Further, referring to Figures 1 to 4, in an embodiment of the present utility model, the rotating shaft 121 includes a hollow shaft body 1211 and a rotating rod 1212. The rotating rod 1212 is arranged inside the shaft body 1211. The elastic member 130 is a return spring, and both ends of the return spring are fixed to both ends of the rotating rod 1212. Bumps 1221 are respectively provided at both ends of the limiting plate 122 along the extending direction of the rotating shaft 121, and the limiting plate 122 is connected to the rotating rod 1212 through the bumps 1221.

[0040] Specifically, in this embodiment, the rotating shaft 121 includes a cylindrical hollow shaft body 1211 with a cavity inside. A rotating rod 1212 is arranged inside the cavity of the shaft body 1211 for fixing both ends of the return spring. The limiting plate 122 is connected to the rotating rod 1212 inside the cavity through the bumps 1221 at both ends. When the limiting plate 122 rotates around the rotating rod 1212, the rotating rod 1212 will drive the return spring to deform, and the return spring will thus generate a reaction force to return the limiting plate 122. With such a setting, the structures of the rotating rod 1212 and the return spring are simple and easy to use, easy to manufacture and maintain. When in use, only the current sensor 100 that can be limited needs to be sleeved on the cable 200. Due to its volume, the cable 200 will cause the limiting plate 122 to automatically rotate outward around the rotating rod 1212, and at the same time, the generated reaction force will cause the limiting plate 122 to clamp the cable 200, improving the working efficiency and enabling the quick clamping and release of the cable 200. It can be understood that the return spring can adopt different stiffnesses according to requirements to adapt to different clamping force requirements and thus can be applied to different working environments.

[0041] Furthermore, referring to Figures 1 to 4 , in an embodiment of the present utility model, an anti-slip member 140 is provided on the side of the limiting plate 122 facing the cable 200. By adding the anti-slip member 140 on one side of the limiting plate 122, when the current sensor 100 that can be limited is installed on the cable 200, the elastic member 130 causes the limiting plate 122 to return and generate a reaction force, which can make the limiting plate 122 closely contact the outer wall of the cable 200. The anti-slip member 140 located between the limiting plate 122 and the cable 200 increases the resistance to the sliding of the current sensor 100 that can be limited, making the position of the current sensor 100 that can be limited more firmly defined.

[0042] Furthermore, referring to Figures 1 to 4, in an embodiment of the present utility model, the anti-slip member 140 is an anti-slip rubber strip. A plurality of anti-slip rubber strips protrude from the surface of the limiting plate 122 facing the cable 200, and the plurality of anti-slip rubber strips are arranged at intervals on one surface of the limiting plate 122 along the axial direction of the cylinder body 110. Specifically, in this embodiment, on the surface of the limiting plate 122 facing the cable 200, a plurality of anti-slip rubber strips are arranged at intervals along the axial direction of the cylinder body 110. The anti-slip rubber strips are triangular prism-shaped protrusions, and the anti-slip rubber strips extend horizontally along the top edge of the limiting plate 122 and are perpendicular to the side edge of the limiting plate 122, and the whole is similar to a right-angled fan-shaped window; when the limit current sensor 100 is installed on the cable 200, the plurality of anti-slip rubber strips play a role similar to a speed bump, further increasing the frictional resistance with the cable 200 and improving the stability of the limit current sensor 100 on the cable 200. Of course, in some other embodiments, the anti-slip member 140 can also adopt other forms, such as laying a non-slip pad covering the entire surface on the side surface of the limiting plate 122, spraying anti-slip paint on the side surface of the limiting member, etc.; the arrangement of the anti-slip rubber strips can also be arranged along the extending direction of the top edge of the limiting plate 122. At this time, the anti-slip rubber strips extend longitudinally along the side edge of the limiting plate 122 and are perpendicular to the top edge of the limiting plate 122. The embodiments of the present utility model are not limited thereto, and the above are all within the protection scope of the present utility model.

[0043] Furthermore, referring to Figures 1 to 4 , in an embodiment of the present utility model, the limiting plate 122 is provided with a hooked rope 150, and the hooked rope 150 is used to connect the cable tie 210 sleeved on the cable 200. Specifically, in this embodiment, a blind hole is opened on one end surface of the limiting plate 122, and a hooked rope 150 is connected in the blind hole. The hooked rope 150 is made of flexible thin iron wire; in the normal state, the hook of the hooked rope 150 is hooked on the edge of the limiting plate 122 to prevent the hook from hurting people. After the limit current sensor 100 is installed, connecting the hook of the hooked rope 150 to the cable tie 210 on the cable 200 can make the position of the limit current sensor 100 more firmly defined, so as to adapt to the cables 200 at different wiring positions and improve the practicability.

[0044] Furthermore, referring to Figures 1 to 4 , in an embodiment of the present utility model, the cylinder body 110 includes a separable first cylinder body 111 and a second cylinder body 112. The first cylinder body 111 and the second cylinder body 112 are oppositely arranged and form an induction channel 110a; a sensor connecting wire 113 is provided at the interval between the first cylinder body 111 and the second cylinder body 112 to electrically connect the first cylinder body 111 and the second cylinder body 112; each pair of limiting components 120 are respectively arranged on the inner walls of the first cylinder body 111 and the second cylinder body 112.

[0045] Specifically, in this embodiment, the cylinder body 110 is arranged in an openable and closable structure. The cylinder body 110 is divided into two parts, including a first cylinder body 111 and a second cylinder body 112. The first cylinder body 111 and the second cylinder body 112 can be separated or closed. Symmetrically arranged two limiting components 120 are respectively provided on the inner walls of the first cylinder body 111 and the second cylinder body 112. It can be understood that both the first cylinder body 111 and the second cylinder body 112 have a pair of limiting components 120 similar to double sliding doors. It should be noted that the two pairs of limiting components 120 are parallel to the partition opening cross-section of the first cylinder body 111 and the second cylinder body 112, so that there is always a reaction force when the limiting components 120 move, causing the limiting components 120 to return to their positions. It can be understood that when the cylinder body 110 adopts a cylindrical cylinder structure, the first cylinder body 111 and the second cylinder body 112 are two semi-cylindrical cylinder structures, that is, two semi-rings. Referring again to Figure 1 , a sensor connecting wire 113 is provided at an opening cross-section of the first cylinder body 111 and the second cylinder body 112 to electrically connect the first cylinder body 111 and the second cylinder body 112, ensuring the electrical connection and signal transmission of the current-limiting sensor 100. By setting the current-limiting sensor 100 in an openable and closable structure, the installation and use of the device are extremely convenient. When in use, only need to open the cylinder body 110, and then sleeve the first cylinder body 111 and the second cylinder body 112 on the cable 200 to complete the installation.

[0046] Furthermore, referring to Figures 1 to 4 , in an embodiment of the present utility model, the shapes and structures of the first cylinder body 111 and the second cylinder body 112 are the same. It can be understood that the current-limiting sensor 100 is divided into two parts with the same structural shape. When opening and closing, the first cylinder body 111 and the second cylinder body 112 on both sides are axisymmetric. The symmetric structure can provide a balanced electromagnetic field distribution. Continuing to refer to Figure 1 , two limiting components 120 are respectively provided on the first cylinder body 111 and the second cylinder body 112. The two limiting components 120 on the first cylinder body 111 and the two limiting components 120 on the second cylinder body 112 are parallel and symmetrically distributed to each other. The interval between the two limiting components 120 on the first cylinder body 111 is the same as the interval between the two limiting components 120 on the second cylinder body 112; during installation, the first cylinder body 111 and the second cylinder body 112 are buckled, and the four limiting components 120 surround the cable 200, presenting a parallelogram shape. With such a setting, on the one hand, the half-splitting helps to distribute forces and stresses, reduce local stress concentration, and this structure is easy to install, can be accurately aligned during the assembly process, and reduce assembly errors caused by misalignment; on the other hand, only one of the two identical components needs to be processed during manufacturing, simplifying the processing process and reducing the processing cost.

[0047] Furthermore, referring to Figures 1 to 4, in an embodiment of the present utility model, the cylinder body 110 is made of aluminum alloy plate. Using aluminum alloy with a certain thickness as the main body shell of the current sensor 100 with limited position, on the one hand, due to the low density and high strength of aluminum alloy, the current sensor 100 with limited position remains light while having sufficient mechanical strength and stiffness to withstand various mechanical stresses during installation and use. At the same time, aluminum alloy also has good corrosion resistance and thermal conductivity, which can effectively improve the service life of the energy-taking coil; on the other hand, aluminum alloy has good electromagnetic compatibility, can effectively shield external electromagnetic interference, protect the internal circuit from damage, and ensure the accuracy and reliability of the current sensor 100 with limited position.

[0048] The above are only the optional embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made under the inventive concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.

Claims

1. A current sensor with a limit function, which is used to be sleeved on a cable, is characterized in that, include: A cylinder, wherein the inner wall of the cylinder is formed with a sensing channel, and the cable is passed through the sensing channel; At least two pairs of limit assemblies are movably arranged on the inner wall of the cylinder, and each pair of limit assemblies are spaced apart and symmetrically arranged on both sides of the central axis of the cylinder; when the cable passes through the sensing channel, the limit assemblies move in a direction away from the central axis of the cylinder, so that the cable is surrounded by at least two pairs of limit assemblies and limited at the center of the sensing channel.

2. The position-limitable current sensor according to claim 1, characterized in that, It includes an elastic member, which is arranged on the limiting assembly and is used to automatically return the limiting assembly. When the limiting assembly moves, the elastic member undergoes elastic deformation to automatically return at least two pairs of the limiting assemblies and clamp the cables.

3. The position-limitable current sensor according to claim 2, wherein The limiting assembly includes a rotating shaft and a limiting plate. The rotating shaft is arranged on the inner wall of the cylinder. The rotating shaft is provided with the elastic member. The limiting plate is movably connected with the elastic member. The limiting plate can rotate around the rotating shaft in a direction away from the central axis of the cylinder. The elastic member is used to return the limiting plate to its original position.

4. The position-limitable current sensor according to claim 3, wherein The rotating shaft includes an internally hollow shaft body and a rotating rod, the rotating rod is arranged inside the shaft body, the elastic member is a return spring, both ends of the return spring are fixed to the two ends of the rotating rod, the limiting plate is respectively provided with protrusions at both ends along the extension direction of the rotating shaft, and the limiting plate is connected to the rotating rod through the protrusions.

5. The position-limitable current sensor according to claim 3, wherein A non-slip part is provided on a surface of the limiting plate on one side facing the cable.

6. The position-limiting current sensor according to claim 5, wherein The anti-slip member is an anti-slip rubber strip, and a plurality of the anti-slip rubber strips are protruding from a surface of the limiting plate facing the cable, and the plurality of the anti-slip rubber strips are spaced apart on a surface of the limiting plate along the axial direction of the cylinder.

7. The position-limitable current sensor according to claim 3, wherein, The cable sleeve is provided with a cable tie, and the limiting plate is provided with a hook rope, and the hook rope is used to connect the cable tie.

8. The position-limitable current sensor according to any one of claims 1 to 7, characterized in that, The cylinder includes a separable first cylinder and a second cylinder, which are arranged opposite to each other and form the sensing channel; a sensor connecting line is provided at the interval between the first cylinder and the second cylinder to electrically connect the first cylinder and the second cylinder; each pair of the limit assemblies is respectively arranged on the inner wall of the first cylinder and the inner wall of the second cylinder.

9. The position-limitable current sensor according to claim 8, wherein The first cylinder and the second cylinder have the same shape and structure.

10. The position-limiting current sensor according to claim 1, characterized in that The cylinder is an aluminum alloy plate.

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