Column switch current sensor

Abstract

The utility model discloses a pole-mounted switch current sensor, and aims to provide a pole-mounted switch current sensor which is convenient to disassemble and assemble, strong in anti-interference performance and strong in heat dissipation performance, the pole-mounted switch current sensor is characterized in that the pole-mounted switch current sensor comprises an insulating shell, a magnetic core of an annular closed structure is arranged in the insulating shell, and an induction coil is wound on the magnetic core; a plurality of heat dissipation fins which are integrally formed are arranged on the outer side of the insulating shell, the heat dissipation fins are distributed in the length direction outside the insulating shell, the distance between every two adjacent heat dissipation fins is 3-8 cm, and an installation structure matched with a pole-mounted switch is arranged on the insulating shell and used for fixedly installing the current sensor on a designated position of the pole-mounted switch. The current sensor is suitable for the technical field of current sensors.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of current sensor technical field, more specifically, it relates to a pole-mounted switch current sensor. BACKGROUND

[0002] With the continuous expansion of power system scale and the increasing complexity, the requirement of power supply reliability and automation level is also higher and higher. As the key equipment in distribution network, pole-mounted switch needs to monitor its current situation in real time, so as to find fault in time and isolate and restore power supply. Current sensor emerges as the times require.

[0003] However, the existing current sensor is mostly bulky, complex and difficult to install. Once damaged, it will lead to the entire product scrap, and the high product cost will cause waste and loss to enterprises and power grid. UTILITY MODEL CONTENT

[0004] In view of the deficiencies of the prior art, the utility model aims to provide a pole-mounted switch current sensor which is convenient to disassemble and assemble, has strong anti-interference performance and high heat dissipation.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a pole-mounted switch current sensor, comprising an insulating shell, a magnetic core in the form of a ring-shaped closed structure is arranged in the insulating shell, an induction coil is wound on the magnetic core, a plurality of heat dissipation fins are integrally formed on the outer side of the insulating shell, the heat dissipation fins are distributed along the length direction of the insulating shell, the distance between adjacent heat dissipation fins is 3-8 cm, and a mounting structure adapted to the pole-mounted switch is arranged on the insulating shell to fix and install the current sensor at a specified position of the pole-mounted switch.

[0006] The utility model is further provided as follows: the shape structure of the heat dissipation fin is in the form of a wave or a sawtooth, and the connecting part of the heat dissipation fin and the insulating shell is in the form of an arc.

[0007] The utility model is further provided as follows: the mounting structure comprises a clamping groove arranged on one side of the insulating shell, a clamping rail arranged on the pole-mounted switch and a clamping buckle arranged on the other side of the insulating shell, the clamping groove is matched with the clamping rail, and the clamping buckle is configured to make the clamping groove and the clamping rail abut each other by tightening the clamping buckle.

[0008] The utility model is further provided as follows: a rubber buffer pad is arranged at the contact part of the insulating shell and the pole-mounted switch, and the surface of the rubber buffer pad is provided with a raised pattern.

[0009] The utility model is further provided as follows: the insulating shell is in a double-layer structure, the inner layer is a metal with high magnetic permeability, and the outer layer is insulating plastic.

[0010] The utility model further sets up: the magnetic core is equipped with insulating hot silica gel layer, still be equipped with ferrite powder or high entropy alloy powder in insulating hot silica gel layer, ferrite powder or high entropy alloy powder forms the magnetic core anti -interference layer in insulating hot silica gel layer.

[0011] The utility model discloses the beneficial effect is:

[0012] 1. The key components such as magnetic core and induction coil are designed in the insulating shell, the structure is compact, the volume is relatively small, the annular closed magnetic core in the insulating shell and the induction coil wound thereon provide a stable magnetic field environment and sensing path for current measurement, which can effectively reduce the external magnetic field interference, improve the accuracy and stability of measurement, ensure the accurate measurement of the on-pole switch current, the insulating shell is provided with integrally-formed heat dissipation fins distributed along the length direction, the heat dissipation area is increased, and the heat dissipation efficiency is improved, the insulating shell is provided with a mounting structure matched with the on-pole switch, which can accurately and quickly fix the current sensor to the specified position of the on-pole switch. Not only reduces the installation difficulty, but also saves the installation time and labor cost, facilitates the installation and maintenance work in the power distribution network site.

[0013] 2. When the interval between adjacent heat dissipation fins is less than 3cm, the heat dissipation space is too small, which is not conducive to natural heat dissipation; when the interval between adjacent heat dissipation fins is greater than 8cm, the overall arrangement reduces the number of heat dissipation fins, which affects the heat dissipation effect, therefore, the interval between adjacent heat dissipation fins is 3-8cm, which has good heat dissipation area and reasonable number of heat dissipation fins, effectively avoiding the problems of component aging and performance degradation caused by heat accumulation in the sensor, the shape structure of the heat dissipation fins is wave-shaped or zigzag-shaped, which strengthens the air convection heat exchange and improves the heat dissipation efficiency, and the connection part between the heat dissipation fins and the insulating shell is arc-shaped, which reduces the thermal stress concentration and improves the overall structural reliability, preventing cracking and damage caused by thermal expansion and contraction.

[0014] 3. The mounting structure includes a clamping groove arranged on one side of the insulating shell, a clamping rail arranged on the on-pole switch, and a clamping buckle arranged on the other side of the insulating shell, and the clamping groove and the clamping rail are matched, which can realize the preliminary positioning and quick docking of the sensor and the on-pole switch, and only needs to slide the clamping groove along the clamping rail during installation, which is simple and intuitive, and does not need complex alignment process, greatly saving the installation time and labor cost, and the clamping buckle further enhances the fixing effect, and after tightening the clamping buckle, the clamping groove and the clamping rail can be in close contact with each other, forming a tight connection, effectively preventing the sensor from loosening or shifting on the on-pole switch due to vibration, external force and other factors, and the contact part between the insulating shell and the on-pole switch is provided with a rubber buffer pad, which can not only buffer the vibration, but also prevent the accumulation of static electricity from interfering with the sensor, and the surface of the rubber buffer pad has protruding lines to increase the friction and ensure the installation stability.

[0015] 4. The insulating shell is a double-layer structure, the inner layer is a metal with high magnetic permeability, and the outer layer is a high-strength and weather-resistant insulating plastic, the two are closely attached, effectively shielding external electromagnetic and electric field interference, the magnetic core is provided with an insulating thermal silicone layer, and the insulating thermal silicone layer is further provided with ferrite powder or high-entropy alloy powder, the ferrite powder or high-entropy alloy powder forms a magnetic core anti-interference layer in the insulating thermal silicone layer, further enhancing the anti-interference ability of the magnetic core, and assisting the magnetic core in heat dissipation. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is a structural schematic view of the utility model;

[0017] Fig. 2 It is a partial sectional view of the utility model;

[0018] Figs. 1-2 Reference signs: 1, insulating shell; 2, magnetic core; 3, induction coil; 4, heat dissipation fin; 5, clamping groove; 6, clamping rail; 7, current sensor; 8, pole switch. DETAILED DESCRIPTION

[0019] Reference Figs. 1 to 2 The utility model embodiment is further explained.

[0020] For ease of description, spatial relative terms such as "upper", "lower", "left", "right" and the like are used in the embodiments to describe the relationship of one element or feature shown in the drawing relative to another element or feature. It should be understood that, in addition to the orientation shown in the drawing, the spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the drawing is inverted, the element described as being "below" other elements or features will be positioned "above" the other elements or features. Therefore, the exemplary term "below" can include both upward and downward orientations. The device can be positioned in other ways (rotated 90 degrees or positioned in other orientations), and the spatial relative description used herein can be interpreted accordingly.

[0021] Moreover, relational terms such as "first" and "second" and the like are used only to distinguish one from another of a same name, and do not necessarily require or imply there is any such actual relationship or order between the parts.

[0022] For example, Figs. 1 to 2The current sensor of the pole-mounted switch shown comprises an insulating shell 1, a magnetic core 2 in annular closed structure is arranged in the insulating shell 1, and an induction coil 3 is wound on the magnetic core 2. The key components such as the magnetic core 2 and the induction coil 3 are integrally and centrally designed in the insulating shell 1, so that the structure is compact and the volume is relatively small. The annular closed magnetic core 2 and the induction coil 3 wound thereon in the insulating shell 1 provide a stable magnetic field environment and an induction path for current measurement, which can effectively reduce the external magnetic field interference, improve the measurement accuracy and stability, and ensure the accurate measurement of the current of the pole-mounted switch 8. A plurality of integrally formed heat dissipation fins 4 are arranged on the outer side of the insulating shell 1 and are distributed along the length direction of the insulating shell 1. The outer side of the insulating shell 1 is provided with integrally formed heat dissipation fins 4 and is distributed along the length direction, which increases the heat dissipation area and improves the heat dissipation efficiency. The insulating shell 1 is provided with a mounting structure matched with the pole-mounted switch 8, which can accurately and quickly fix and install the current sensor 7 at the specified position of the pole-mounted switch 8. Not only the installation difficulty is reduced, but also the installation time and labor cost are saved, and the installation and maintenance work in the power distribution network site is facilitated.

[0023] When the distance between adjacent heat dissipation fins 4 is less than 3 cm, the heat dissipation space is too small, which is not conducive to natural heat dissipation. When the distance between adjacent heat dissipation fins 4 is greater than 8 cm, the overall arrangement reduces the number of heat dissipation fins 4, which affects the heat dissipation effect. Therefore, the distance between adjacent heat dissipation fins 4 is 3-8 cm, which has a good heat dissipation area and a reasonable number of heat dissipation fins 4, effectively avoiding the problems of component aging and performance degradation caused by internal heat accumulation of the sensor.

[0024] The shape structure of the heat dissipation fins 4 is wave-shaped or zigzag-shaped, which strengthens the air convection heat exchange and improves the heat dissipation efficiency. The connection part between the heat dissipation fins 4 and the insulating shell 1 is arc-shaped, which reduces the thermal stress concentration and improves the overall structural reliability, preventing cracking and damage caused by thermal expansion and contraction.

[0025] The mounting structure comprises a clamping groove 5 arranged on one side of the insulating shell 1, a clamping rail 6 arranged on the pole-mounted switch 8, and a clamping buckle arranged on the other side of the insulating shell 1. The clamping groove 5 and the clamping rail 6 are matched, which can realize the preliminary positioning and quick docking of the sensor and the pole-mounted switch 8. During installation, the clamping groove 5 only needs to be slid along the clamping rail 6, which is simple and intuitive, and does not require a complex alignment process, greatly saving the installation time and labor cost. The clamping buckle further enhances the fixing effect. After the clamping buckle is tightened, the clamping groove 5 and the clamping rail 6 can be in close contact with each other, forming a tight connection, which effectively prevents the sensor from loosening or shifting on the pole-mounted switch 8 due to factors such as vibration and external force. A rubber buffer pad is arranged at the contact part between the insulating shell 1 and the pole-mounted switch 8, which can not only buffer the vibration, but also prevent the accumulation of static electricity from interfering with the sensor. The surface of the rubber buffer pad has protruding lines, which increases the friction and ensures the installation stability.

[0026] The insulating shell 1 is a double-layer structure, the inner layer is a metal with high magnetic permeability, and the outer layer is an insulating plastic with high strength and weather resistance, which are tightly attached to effectively shield external electromagnetic and electric field interference; the magnetic core 2 is provided with an insulating thermal silicone layer, and the insulating thermal silicone layer is further provided with ferrite powder or high-entropy alloy powder, which forms an anti-interference layer of the magnetic core 2 in the insulating thermal silicone layer, further enhances the anti-interference capability of the magnetic core 2, and simultaneously assists heat dissipation of the magnetic core 2.

[0027] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any common change and replacement within the technical scheme range of the present application should be included in the protection range of the present application.

Claims

1. A pole-mounted switch current sensor comprising an insulating housing (1), characterized in that The insulating shell (1) is provided with a magnetic core (2) in annular closed structure, the magnetic core (2) is wound with an induction coil (3), the insulating shell (1) is provided with a plurality of integrally formed heat dissipation fins (4) on the outside, the heat dissipation fins (4) are distributed along the length direction of the insulating shell (1), the pitch between adjacent heat dissipation fins (4) is 3-8cm, and the insulating shell (1) is provided with a mounting structure matched with the column switch (8) for fixing the current sensor (7) on the specified part of the column switch (8).

2. A pole-mounted switch current sensor according to claim 1, wherein, The shape of the heat dissipation fin (4) is wave-shaped or zigzag-shaped, and the connecting part of the heat dissipation fin (4) and the insulating shell (1) is arc-shaped.

3. A pole-mounted switch current sensor according to claim 1, wherein, The mounting structure includes a clamping groove (5) provided on one side of the insulating shell (1), a clamping rail (6) provided on the column switch (8) and a clamping buckle provided on the other side of the insulating shell (1), the clamping groove (5) and the clamping rail (6) are matched, and the clamping buckle is configured to make the clamping groove (5) and the clamping rail (6) resist each other by tightening the clamping buckle.

4. A pole-mounted switch current sensor according to claim 1, wherein, The contact part of the insulating shell (1) and the column switch (8) is provided with a rubber buffer pad, and the surface of the rubber buffer pad is provided with a convex pattern.

5. A pole-mounted switch current sensor according to claim 1, wherein, The insulating shell (1) is a double-layer structure, the inner layer is a metal with high magnetic permeability, and the outer layer is insulating plastic.

6. A pole-mounted switch (8) current sensor (7) according to claim 1, characterized in that, The magnetic core (2) is provided with an insulating thermal silica gel layer, the insulating thermal silica gel layer is further provided with ferrite powder or high-entropy alloy powder, and the ferrite powder or high-entropy alloy powder forms an anti-interference layer of the magnetic core (2) in the insulating thermal silica gel layer.

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