Anti-electromagnetic interference magnetic core sensor

Abstract

The utility model discloses an anti-electromagnetic interference magnetic core sensor, which relates to the technical field of magnetic core sensors and comprises a bottom shell, a sensor body is mounted at the bottom end of the inner side of the bottom shell, a top cover is clamped at the top end of the bottom shell, a butt-joint plate is inserted on the outer wall of the top cover, a connecting copper bar is mounted on one side of the butt-joint plate, and the other side of the butt-joint plate is provided with an anti-electromagnetic interference magnetic core sensor. A limiting groove is formed in one side of the bottom shell, and a ventilation opening is formed in the inner side of the limiting groove. By adopting the structure, the sensor body on the inner side of the bottom shell can be effectively ventilated due to the arrangement of the ventilation opening, and the first dustproof plate and the second dustproof plate can effectively block dust or pollutants in the air while not obstructing the air circulation, so that the safety of the sensor body is improved, and the service life of the sensor body is prolonged. And meanwhile, circulating air can enter the ventilation opening in a bending manner, so that the filtering plate performs good secondary filtering on convection ventilation, a good dustproof and heat dissipation effect can be achieved, and the use effect of the sensor body can be effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of magnetic core sensor, especially relates to a kind of anti-electromagnetic interference magnetic core sensors. BACKGROUND

[0002] Anti-electromagnetic interference magnetic core sensor is made of ferrite and other magnetic materials Anti-interference device, can effectively reduce the influence of external electromagnetic interference on equipment.It is equivalent to low-pass filter, can suppress the radio frequency interference of power line, signal line etc., with simple, effective, small space occupation and other advantages.Different ferrite materials are suitable for different frequency ranges, and are widely used in electronic equipment, to ensure stable operation of equipment.

[0003] However, the existing sensor still has some shortcomings, when using magnetic core sensor, sensor will release certain heat during operation, heat will affect the induction effect of sensor under long-time accumulation, generally, the way of opening vent on shell is used for heat dissipation, but dust or pollutants in air will also enter the shell through the vent, and then still affect the induction effect of sensor, so it is very inconvenient. UTILITY MODEL CONTENTS

[0004] In view of the problems mentioned in the background art, the utility model aims to provide an anti-electromagnetic interference magnetic core sensor to solve the problems raised in the above background art.

[0005] The above technical purpose of the utility model is realized by the following technical scheme:

[0006] An anti-electromagnetic interference magnetic core sensor, comprising a bottom shell, a sensor body is installed on the inner bottom end of the bottom shell, a top cover is connected to the top end of the bottom shell, a docking plate is inserted on the outer wall of the top cover, a connecting copper bar is installed on one side of the docking plate, a limiting groove is formed on one side of the bottom shell, a vent is formed on the inner side of the limiting groove, the vent is communicated with the inner side of the bottom shell, a strip-shaped port is formed on the front side of the bottom shell, the strip-shaped port is communicated with the inner side of the vent, a filter plate is inserted on the inner side of the strip-shaped port, the filter plate covers the inner side of the vent, a limiting frame is inserted on the inner side of the limiting groove, first and second dustproof plates are fixedly connected to the inner wall of the limiting frame, and the position of the second dustproof plate corresponds to the position of the filter plate.

[0007] As a preferred technical scheme, a clamping groove is formed on the top end of the bottom shell, a clamping block matched with the clamping groove is fixedly connected to the bottom end of the top cover, the clamping block is fixedly connected to the four edges of the edge corner of the bottom end of the top cover, the bottom end of the clamping block is clamped in the clamping groove, and the top cover is clamped to the top end of the bottom shell through the clamping groove and the clamping block.

[0008] As a preferred technical scheme, the top end of the bottom shell is provided with a sealing groove, the bottom end of the top cover is fixedly connected with a sealing ring matched with the sealing groove, the sealing ring is located on the inner side close to the clamping block, and the sealing ring covers the inner side of the sealing groove.

[0009] As a preferred technical scheme, the inner side of the limiting groove is provided with a positioning groove, the other side of the limiting frame is fixedly connected with a positioning block matched with the positioning groove, the positioning block is clamped in the inner side of the positioning groove, and the limiting frame is clamped in the inner side of the limiting groove through the positioning groove and the positioning block.

[0010] As a preferred technical scheme, the inner wall of the ventilation opening is provided with a groove, the inner side of the groove is fixedly connected with a magnet, the magnet covers the inner side of the groove, the rear side of the filter plate is attached to the front side of the magnet, the rear side of the filter plate is made of a magnetic material, the front side of the filter plate is fixedly connected with a sealing plate, the sealing plate covers the front side of the strip-shaped opening, the front side of the sealing plate is fixedly connected with a protruding block, and the shape of the corner of the protruding block is arc-shaped.

[0011] As a preferred technical scheme, one side of the top cover is provided with a slot, the other side of the butt joint plate is fixedly connected with a plug plate matched with the slot, and the plug plate is plugged into the inner side of the slot.

[0012] As a preferred technical scheme, the top end of the top cover is provided with a threaded hole, the threaded hole extends to the inside of the plug plate, and the inner side of the threaded hole is threadedly connected with a bolt, and the bottom end of the bolt is threadedly connected to the inside of the plug plate through the threaded hole.

[0013] In summary, the utility model mainly has the following beneficial effects:

[0014] First, when using, due to the ventilation opening, the sensor body inside the bottom shell can be effectively ventilated, the first dustproof plate and the second dustproof plate can effectively block dust or pollutants in the air without affecting air circulation, and circulating air can enter the ventilation opening in a curved manner, so that the filter plate can well perform secondary filtration on the circulating air, thereby good dustproof and heat dissipation effects can be achieved, and the use effect of the sensor body can be effectively improved.

[0015] Second, due to the existence of the plug plate, the insertion of the plug plate can effectively limit the butt joint plate point, so as to avoid displacement of the butt joint plate, after the butt joint plate is limited, the bolt is screwed into the threaded hole, thereby the plug plate point can be effectively fixed, and the stability of the connection copper bar point installation can be improved again, thereby it is also beneficial for users to disassemble and maintain the connection copper bar by using the opposite installation mode later, due to the existence of the magnet, the adsorption of the magnet can effectively limit the filter plate point, so as to avoid displacement of the filter plate, and meanwhile, the user can not be affected to pull out the filter plate through the strip-shaped opening, so as to maintain or clean the filter plate later. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic diagram of the utility model;

[0017] Figure 2 is a structural schematic diagram of the bottom shell inside;

[0018] Figure 3 is a structural schematic diagram of the utility model Figure 2 A part enlarged structure;

[0019] Figure 4 is a structural schematic diagram of the filter plate of the utility model;

[0020] Figure 5 is a structural schematic diagram of the limiting frame of the utility model;

[0021] Figure 6 is a structural schematic diagram of the top cover bottom end of the utility model;

[0022] Figure 7 is a structural schematic diagram of the butt joint plate of the utility model;

[0023] Figure 8 is a structural schematic diagram of the top cover top end of the utility model.

[0024] Reference signs: 1, bottom shell; 2, sensor body; 3, top cover; 4, clamping groove; 5, sealing groove; 6, clamping block; 7, sealing ring; 8, insertion slot; 9, butt joint plate; 10, connecting copper bar; 11, insertion plate; 12, screw hole; 13, bolt; 14, limiting slot; 15, ventilation opening; 16, recess; 17, magnet; 18, positioning slot; 19, strip-shaped opening; 20, filter plate; 21, sealing plate; 22, protruding block; 23, limiting frame; 24, first dustproof plate; 25, second dustproof plate; 26, positioning block. DETAILED DESCRIPTION

[0025] EMBODIMENT

[0026] REFERENCE Figures 1 to 8This embodiment of an anti-electromagnetic interference magnetic core sensor includes a base shell 1, a sensor body 2 mounted on the inner bottom end of the base shell 1, a top cover 3 snapped onto the top of the base shell 1, a mating plate 9 inserted into the outer wall of the top cover 3, a connecting copper busbar 10 mounted on one side of the mating plate 9, a limiting groove 14 formed on one side of the base shell 1, a ventilation opening 15 formed on the inner side of the limiting groove 14, the ventilation opening 15 communicating with the inner side of the base shell 1, and a strip-shaped opening 19 formed on the front side of the base shell 1, the strip-shaped opening 19 connecting with... The inner side of the vent 15 is open, and a filter plate 20 is inserted into the inner side of the strip 19, covering the inner side of the vent 15. A limit frame 23 is inserted into the inner side of the limiting groove 14. A first dustproof plate 24 and a second dustproof plate 25 are fixedly connected to the inner wall of the limit frame 23. The position of the second dustproof plate 25 corresponds to the position of the filter plate 20. The basic structure of the anti-electromagnetic interference magnetic core sensor consists of a magnetic field sensing element, an anti-interference magnetic core, a signal processor, and an output interface. The anti-interference magnetic core usually uses magnetic materials such as ferrite and is the core component for anti-interference. In use, when external electromagnetic interference exists, the magnetic core, with its high permeability, reflects interference signals in the low-frequency band and converts electromagnetic energy into heat energy loss in the high-frequency band through the eddy current effect, thereby weakening the interference. The magnetic field sensing element converts changes in the external magnetic field into electrical signals, which are processed by the signal processor and output to ensure that the sensor works stably and accurately in complex electromagnetic environments.

[0027] refer to Figure 2 and Figure 6 The top of the bottom shell 1 has a slot 4, and the bottom of the top cover 3 is fixedly connected to a matching block 6. The block 6 is fixedly connected to the four sides near the corner of the bottom of the top cover 3. The bottom of the block 6 is engaged inside the slot 4. The top cover 3 is engaged to the top of the bottom shell 1 through the slot 4 and the block 6. Due to the presence of the block 6, the engagement of the block 6 can effectively engage the top cover 3 to prevent displacement. At the same time, the user can also remove the top cover 3 later through the engagement principle to inspect or maintain the structure of the sensor body 2.

[0028] refer to Figure 2 and Figure 6 The bottom shell 1 has a sealing groove 5 at its top, and the bottom of the top cover 3 is fixedly connected to a sealing ring 7 that matches the sealing groove 5. The sealing ring 7 is located on the inner side of the adjacent locking block 6 and covers the inner side of the sealing groove 5. Due to the presence of the sealing ring 7, the sealing ring 7 can effectively seal the direct connection point between the top cover 3 and the bottom shell 1, which can achieve a good waterproof sealing effect and thus improve the safety protection of the overall shell structure.

[0029] refer to Figures 2 to 5The inner side of the limiting groove 14 is provided with a positioning groove 18. The other side of the limiting frame 23 is fixedly connected with a positioning block 26 that matches the positioning groove 18. The positioning block 26 is snapped into the inner side of the positioning groove 18. The limiting frame 23 is snapped into the inner side of the limiting groove 14 through the positioning groove 18 and the positioning block 26. Due to the presence of the positioning block 26, the snapping of the positioning block 26 can effectively fix the position of the limiting frame 23 to prevent the limiting frame 23 from shifting. At the same time, the user can also disassemble the limiting frame 23 through the snapping principle so that the user can clean or maintain the inner wall structure of the limiting frame 23 later.

[0030] refer to Figures 1 to 4 A groove 16 is provided on the inner wall of the vent 15. A magnet 17 is fixedly connected to the inner side of the groove 16, covering the inner side of the groove 16. The rear side of the filter plate 20 is in contact with the front side of the magnet 17. The rear side of the filter plate 20 is made of magnetic material. A sealing plate 21 is fixedly connected to the front side of the filter plate 20, covering the front side of the strip opening 19. A protrusion 22 is fixedly connected to the front side of the sealing plate 21. The protrusion 22 has an arc-shaped corner. Due to the presence of the magnet 17, the attraction of the magnet 17 can effectively limit the position of the filter plate 20 to prevent the filter plate 20 from shifting. At the same time, it will not hinder the user from pulling out the filter plate 20 through the strip opening 19, so that the user can maintain or clean the filter plate 20 later.

[0031] refer to Figures 1 to 8 A slot 8 is provided on one side of the top cover 3, and an insert plate 11 that matches the slot 8 is fixedly connected to the other side of the mating plate 9. The insert plate 11 is inserted into the inside of the slot 8. A screw hole 12 is provided at the top of the top cover 3, and the screw hole 12 extends into the inside of the insert plate 11. A bolt 13 is threadedly connected to the inside of the screw hole 12. The bottom end of the bolt 13 is threaded into the inside of the insert plate 11 through the screw hole 12. Due to the presence of the insert plate 11, the insertion of the insert plate 11 can effectively limit the position of the mating plate 9 to prevent the mating plate 9 from shifting. After the mating plate 9 is limited, the bolt 13 is screwed in through the screw hole 12, which can effectively fix the position of the insert plate 11. At the same time, it can also improve the stability of the installation of the connecting copper busbar 10, and also facilitate the user to disassemble and maintain the connecting copper busbar 10 in the future using the opposite installation method.

[0032] Operating principle and advantages: During use, the sensor body 2 inside the bottom shell 1 can be effectively ventilated through the vent 15. The first dustproof plate 24 and the second dustproof plate 25 can effectively block dust or pollutants in the air without obstructing airflow. Simultaneously, the airflow enters the vent 15 in a curved manner, allowing the filter plate 20 to perform good secondary filtration, thus achieving good dust prevention and heat dissipation, effectively improving the performance of the sensor body 2. Due to the presence of the locking block 6, the top cover 3 can be effectively locked in place to prevent displacement. The user can also remove the top cover 3 later using the locking principle for inspection or maintenance of the sensor body 2 structure. Due to the presence of the sealing ring 7, the direct connection point between the top cover 3 and the bottom shell 1 can be effectively sealed, achieving good waterproof sealing and improving the overall safety and protection of the shell structure. Due to the presence of the positioning block 26... The snap-in of the positioning block 26 can effectively fix the position of the limiting frame 23 to prevent displacement of the limiting frame 23. At the same time, the user can also disassemble the limiting frame 23 through the snap-in principle so that the user can clean or maintain the inner wall structure of the limiting frame 23 later. Due to the presence of the magnet 17, the attraction of the magnet 17 can effectively limit the position of the filter plate 20 to prevent displacement of the filter plate 20. At the same time, it will not hinder the user from pulling out the filter plate 20 through the strip opening 19 so that the user can maintain or clean the filter plate 20 later. Due to the presence of the insert plate 11, the insertion of the insert plate 11 can effectively limit the position of the docking plate 9 to prevent displacement of the docking plate 9. After the docking plate 9 is fixed, the bolt 13 is screwed in through the screw hole 12, which can effectively fix the position of the insert plate 11. At the same time, it can also improve the stability of the installation of the connecting copper busbar 10, and also facilitate the user to disassemble and maintain the connecting copper busbar 10 in the future using the opposite installation method.

Claims

1. An electromagnetic interference immune magnetic core sensor comprising a base housing (1), characterized in that: The inner side bottom end of the bottom shell (1) is provided with a sensor body (2), the top end of the bottom shell (1) is clamped with a top cover (3), the outer wall of the top cover (3) is inserted with a docking plate (9), one side of the docking plate (9) is provided with a connecting copper bar (10), one side of the bottom shell (1) is provided with a limiting groove (14), the inner side of the limiting groove (14) is provided with a ventilation opening (15), the ventilation opening (15) is communicated with the inner side of the bottom shell (1), the front side of the bottom shell (1) is provided with a strip-shaped opening (19), the strip-shaped opening (19) is communicated with the inner side of the ventilation opening (15), the inner side of the strip-shaped opening (19) is inserted with a filter plate (20), the filter plate (20) covers the inner side of the ventilation opening (15), the inner side of the limiting groove (14) is inserted with a limiting frame (23), the inner wall of the limiting frame (23) is fixedly connected with a first dustproof plate (24) and a second dustproof plate (25), the position of the second dustproof plate (25) corresponds to the position of the filter plate (20).

2. An electromagnetic interference immune magnetic core sensor according to claim 1, characterized in that: The top end of the bottom shell (1) is provided with a clamping groove (4), the bottom end of the top cover (3) is fixedly connected with a clamping block (6) matched with the clamping groove (4), the clamping block (6) is fixedly connected to the four edges of the top cover (3) bottom end near the corner, the bottom end of the clamping block (6) is clamped in the clamping groove (4), and the top cover (3) is clamped in the top end of the bottom shell (1) through the clamping groove (4) and the clamping block (6).

3. An electromagnetic interference immune magnetic core sensor according to claim 2, wherein: The top end of the bottom shell (1) is provided with a sealing groove (5), the bottom end of the top cover (3) is fixedly connected with a sealing ring (7) matched with the sealing groove (5), the sealing ring (7) is located on the inner side close to the clamping block (6), and the sealing ring (7) covers the inner side of the sealing groove (5).

4. The electromagnetic interference immune magnetic core sensor of claim 1, wherein: The inner side of the limiting groove (14) is provided with a positioning groove (18), the other side of the limiting frame (23) is fixedly connected with a positioning block (26) matched with the positioning groove (18), the positioning block (26) is clamped in the inner side of the positioning groove (18), and the limiting frame (23) is clamped in the inner side of the limiting groove (14) through the positioning groove (18) and the positioning block (26).

5. The electromagnetic interference immune magnetic core sensor of claim 1, wherein: The inner wall of the ventilation opening (15) is provided with a groove (16), the inner side of the groove (16) is fixedly connected with a magnet (17), the magnet (17) covers the inner side of the groove (16), the rear side of the filter plate (20) is attached to the front side of the magnet (17), the rear side of the filter plate (20) is made of magnetic iron material, the front side of the filter plate (20) is fixedly connected with a sealing plate (21), the sealing plate (21) covers the front side of the strip-shaped opening (19), the front side of the sealing plate (21) is fixedly connected with a protruding block (22), and the corner shape of the protruding block (22) is arc-shaped.

6. The electromagnetic interference immune magnetic core sensor of claim 1, wherein: One side of the top cover (3) is provided with a slot (8), the other side of the docking plate (9) is fixedly connected with an insertion plate (11) matched with the slot (8), and the insertion plate (11) is inserted into the inner side of the slot (8).

7. An electromagnetic interference immune magnetic core sensor according to claim 6, wherein: The top end of the top cover (3) is provided with a screw hole (12), the screw hole (12) extends to the inside of the plug-in board (11), the inside of the screw hole (12) is screw-connected with a bolt (13), and the bottom end of the bolt (13) is screw-connected to the inside of the plug-in board (11) through the screw hole (12).

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