Current sensor for electric power detection

Abstract

The utility model provides a current sensor for electric power detection, which relates to the field of current sensors, and comprises a bottom plate, the top of the bottom plate is fixedly connected with a sensor main body, the top of the bottom plate is provided with an anti-interference assembly, the anti-interference assembly comprises a shielding cover, and the shielding cover is sleeved on the surface of the sensor main body. The housing is made of a metal shielding material. Current in a power transmission line can be detected through the sensor main body, the screw sleeve is in threaded connection with the screw rod, so that the screw sleeve can be driven to move downwards through rotation of the screw rod, the screw sleeve drives the connecting plate to move downwards, the connecting plate drives the shielding cover to move downwards, and the shielding cover gradually covers the sensor main body. Meanwhile, the shielding cover can block electromagnetic interference generated on the outside, interference or offset of the external electromagnetic interference on output signals of the sensor body is prevented, and therefore the accuracy and stability of the sensor body in the current detection process can be ensured.

Description

Technical Field

[0001] The utility model belongs to the field of current sensors, and specifically relates to a current sensor for power detection. Background Art

[0002] A current sensor is a detection device that can sense the information of the measured current and transform the detected information into an electrical signal or other required forms of information that meet certain standard requirements according to certain rules, so as to meet the requirements of information transmission, processing, storage, display, recording, and control.

[0003] When the current sensor is in use, mainly the magnetic sensitive element in the aggregation magnetic circuit outputs a voltage signal after detecting the magnetic flux proportional to the primary side current. This signal is amplified by the amplifier circuit. Since this signal has a linear proportional relationship with the primary side current signal, the primary side current signal can be obtained through calculation.

[0004] Then it is sent to an instrument or computer for display.

[0005] However, when the existing current sensors are used for power detection, due to the presence of many cables around, and the lack of corresponding anti-interference mechanisms in the current sensors, during the power detection process, the electromagnetic fields generated by the surrounding cables will interfere with or shift the output signals of the current sensors, thus affecting the accuracy and stability of the measurement.

[0006] In summary, the utility model provides a current sensor for power detection to solve the above problems. Content of the Utility Model

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0008] A current sensor for power detection includes a bottom plate. A sensor main body is fixedly connected to the top of the bottom plate. An anti-interference component is arranged on the top of the bottom plate. The anti-interference component includes a shielding cover. The shielding cover is sleeved on the surface of the sensor main body and is made of a metal shielding material. Connecting rods are fixedly connected to both sides of the top of the bottom plate. A screw rod is movably connected to the inner cavity of the connecting rod. A nut sleeve is threadedly connected to the surface of the screw rod. A connecting plate is fixedly connected to one side of the nut sleeve, and the end of the connecting plate away from the nut sleeve is fixedly connected to the shielding cover.

[0009] Further, in the utility model, the sensor main body includes a housing, a magnetic core, and a PCB board. The PCB board integrates a magnetic sensitive element, an amplification and processing circuit, and a signal line, and both the magnetic core and the PCB board are located inside the housing.

[0010] Furthermore, in the present utility model, mounting members are fixedly connected to both sides of the front and back of the base plate, and screws are threadedly connected to the inner cavities of the mounting members.

[0011] Furthermore, in the present utility model, positioning holes are formed around the top of the base plate, positioning rods are fixedly connected to the periphery of the bottom of the shielding cover, and the bottom of the positioning rods extends into the inner cavity of the positioning holes and is movably connected to the inner cavity of the positioning holes.

[0012] Furthermore, in the present utility model, a through groove is formed on one side of the connecting rod, and the connecting plate penetrates through the inner cavity of the through groove and is slidably connected to the inner cavity of the through groove.

[0013] Furthermore, in the present utility model, a limiting rod is fixedly connected to the back of the screw sleeve, a limiting groove is formed on the back of the inner cavity of the connecting rod, and the end of the limiting rod away from the screw sleeve extends into the inner cavity of the limiting groove and is slidably connected to the inner cavity of the limiting groove.

[0014] Beneficial effects: The present utility model has the following beneficial effects:

[0015] In the present utility model, the sensor main body can be supported and connected by the base plate, and the sensor main body can detect the current in the power transmission line. Since the screw sleeve and the screw are threadedly connected, the screw sleeve can be driven to move downward by rotating the screw, so that the screw sleeve drives the connecting plate downward, and the connecting plate drives the shielding cover downward, so that the shielding cover gradually covers the sensor main body to realize the protection of the sensor main body. At the same time, the shielding cover can block the external electromagnetic interference, preventing the external electromagnetic interference from interfering with or offsetting the output signal of the sensor main body, so as to ensure the accuracy and stability of the sensor main body when detecting the current. Description of the drawings

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

[0017] Figure 2 is a schematic connection structure diagram of the base plate and the sensor main body of the present utility model;

[0018] Figure 3 is a schematic structural diagram of the shielding cover of the present utility model;

[0019] Figure 4 is a schematic partial sectional state structural diagram of the connecting rod of the present utility model.

[0020] In the figure:

[0021] 1. Base plate; 11. Positioning hole; 12. Mounting part; 2. Sensor body; 3. Anti-interference component; 31. Shielding cover; 311. Positioning rod; 32. Connecting rod; 321. Through groove; 322. Limiting groove; 33. Screw; 34. Screw sleeve; 341. Limiting rod; 35. Connecting plate. Detailed implementation mode

[0022] In order to better understand the technical content of the present utility model, specific embodiments are hereby given and described in conjunction with the accompanying drawings as follows. In the present disclosure, aspects of the present utility model are described with reference to the accompanying drawings, and many illustrative embodiments are shown in the drawings. The embodiments of the present disclosure do not necessarily define all aspects of the present utility model. It should be understood that the various concepts and embodiments introduced above, as well as those concepts and implementation manners described in more detail below, can be implemented in any of many ways, because the concepts and embodiments disclosed in the present utility model are not limited to any implementation manner. In addition, some aspects disclosed in the present utility model can be used alone, or in any suitable combination with other aspects disclosed in the present utility model.

[0023] Embodiment 1

[0024] As Figures 1-4 shown, this is the first embodiment of the present utility model. This embodiment provides a current sensor for power detection, including a base plate 1. A sensor body 2 is fixedly connected to the top of the base plate 1. An anti-interference component 3 is arranged on the top of the base plate 1. The anti-interference component 3 includes a shielding cover 31. The shielding cover 31 is sleeved on the surface of the sensor body 2 and is made of a metal shielding material. Connecting rods 32 are fixedly connected to both sides of the top of the base plate 1. A screw 33 is movably connected to the inner cavity of the connecting rod 32. A screw sleeve 34 is threadedly connected to the surface of the screw 33. A connecting plate 35 is fixedly connected to one side of the screw sleeve 34. And one end of the connecting plate 35 away from the screw sleeve 34 is fixedly connected to the shielding cover 31.

[0025] As Figures 1-4 shown, the sensor body 2 can be supported and connected through the base plate 1 to ensure its stability. And the power transmission line of the power passes through the sensor body 2. Then the sensor body 2 can detect the current in the power transmission line. Since the screw sleeve 34 and the screw 33 are threadedly connected, by rotating the screw 33, the screw sleeve 34 can be driven to move downward, so that the screw sleeve 34 drives the connecting plate 35 downward, and the connecting plate 35 drives the shielding cover 31 downward, so that the shielding cover 31 gradually covers the sensor body 2 to realize the protection of the sensor body 2. At the same time, the shielding cover 31 can block the external electromagnetic interference, preventing the external electromagnetic interference from interfering or offsetting the signal output by the sensor body 2, so as to ensure the accuracy and stability of the sensor body 2 when detecting the current.

[0026] Embodiment 2

[0027] Reference Figure 2 , which is the second embodiment of the present utility model, and this embodiment is based on the previous embodiment.

[0028] In this embodiment, the sensor main body 2 includes a housing, a magnetic core and a PCB board. The PCB board is integrated with a magnetic sensitive element, an amplification processing circuit and a signal line, and both the magnetic core and the PCB board are located inside the housing.

[0029] On both sides of the front and back of the bottom plate 1, mounting members 12 are fixedly connected, and screws are threadedly connected to the inner cavity of the mounting members 12.

[0030] Positioning holes 11 are formed around the top of the bottom plate 1. Positioning rods 311 are fixedly connected to the periphery of the bottom of the shielding cover 31. The bottom of the positioning rods 311 extends into the inner cavity of the positioning holes 11 and is movably connected to the inner cavity of the positioning holes 11.

[0031] As Figures 1-3 shown, the bottom plate 1, the sensor main body 2 and the anti-interference component 3 can be installed through the mounting members 12 and screws to ensure their stability. At the same time, when the shielding cover 31 covers and protects the sensor main body 2 downward, the shielding cover 31 will drive the positioning rods 311 into the inner cavity of the positioning holes 11, and thus the positioning of the shielding cover 31 can be realized.

[0032] Embodiment 3

[0033] Reference Figure 4 , which is the third embodiment of the present utility model, and this embodiment is based on the previous two embodiments.

[0034] In this embodiment, a through groove 321 is formed on one side of the connecting rod 32. The connecting plate 35 passes through the inner cavity of the through groove 321 and is slidably connected to the inner cavity of the through groove 321.

[0035] A limiting rod 341 is fixedly connected to the back of the screw sleeve 34. A limiting groove 322 is formed on the back of the inner cavity of the connecting rod 32. The end of the limiting rod 341 away from the screw sleeve 34 extends into the inner cavity of the limiting groove 322 and is slidably connected to the inner cavity of the limiting groove 322.

[0036] As Figure 4 shown, when the screw sleeve 34 drives the connecting plate 35 to move, the screw sleeve 34 will drive the limiting rod 341 to slide along the inner cavity of the limiting groove 322. Thus, the screw sleeve 34 can move along the inner cavity track of the limiting groove 322, so as to limit the screw sleeve 34 and prevent the screw sleeve 34 from rotating. At the same time, the connecting plate 35 will move along the inner cavity track of the through groove 321 during the movement, and thus the connecting plate 35 can be limited to ensure the stability of the connecting plate 35 during the movement.

[0037] In use, the sensor main body 2 can be supported and connected through the bottom plate 1 to ensure its stability. Moreover, the power transmission line passes through the sensor main body 2, and then the sensor main body 2 can detect the current in the power transmission line. When it is necessary to protect the sensor main body 2, by rotating the screw 33 forward, since the nut sleeve 34 is threadedly connected to the screw 33, when the screw 33 rotates, it can drive the nut sleeve 34 to move downward, causing the nut sleeve 34 to drive the connecting plate 35 downward, and the connecting plate 35 drives the shielding cover 31 to move downward, so that the shielding cover 31 gradually covers the sensor main body 2 to achieve the protection of the sensor main body 2. At the same time, the shielding cover 31 can block the electromagnetic interference generated externally, preventing the external electromagnetic interference from interfering with or offsetting the signal output by the sensor main body 2, thereby ensuring the accuracy and stability of the sensor main body 2 when detecting current. When it is necessary to repair and maintain the sensor main body 2 and the sensor main body 2 needs to be exposed externally, first rotate the screw 33 in the reverse direction. When the screw 33 rotates, it can drive the nut sleeve 34 to move upward, and the nut sleeve 34 drives the connecting plate 35 and the shielding cover 31 to move upward. Then the shielding cover 31 will gradually move upward to release the coverage of the sensor main body 2, so that the sensor main body 2 can be exposed externally for convenient maintenance operations.

[0038] The standard parts used in this application document can all be purchased from the market, and can also be customized according to the descriptions in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts, and equipment all adopt conventional models in the prior art. The control method is automatically controlled through a controller, and the control circuit of the controller can be realized by simple programming by those skilled in the art, which belongs to the common general knowledge in this field. And this application document is mainly used to protect mechanical devices, so the control method and circuit connection will not be explained in detail in this application document.

[0039] Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Those with ordinary knowledge in the technical field to which the present utility model belongs can make various changes and modifications without departing from the spirit and scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to what is defined by the claims.

Claims

1. A current sensor for power detection, comprising a base plate (1), characterized in that: The top of the base plate (1) is fixedly connected to a sensor body (2), and an anti-interference component (3) is arranged on the top of the base plate (1). The anti-interference component (3) includes a shielding cover (31), and the shielding cover (31) is sleeved on the surface of the sensor body (2) and is made of a metal shielding material. Connecting rods (32) are fixedly connected to both sides of the top of the base plate (1), and the inner cavity of the connecting rod (32) is movably connected to a screw rod (33), and the surface of the screw rod (33) is threadedly connected to a screw sleeve (34), and a connecting plate (35) is fixedly connected to one side of the screw sleeve (34), and the end of the connecting plate (35) away from the screw sleeve (34) is fixedly connected to the shielding cover (31).

2. The current sensor for power detection according to claim 1, characterized in that: The sensor body (2) comprises a housing, a magnetic core and a PCB board, wherein a magnetic sensitive element, an amplification processing circuit and a signal line are integrated on the PCB board, and the magnetic core and the PCB board are both located inside the housing.

3. The current sensor for power detection according to claim 1, characterized in that: Both sides of the front and back sides of the bottom plate (1) are fixedly connected with mounting parts (12), and the inner cavity of the mounting parts (12) is threadedly connected with screws.

4. The current sensor for power detection according to claim 1, characterized in that: Positioning holes (11) are provided on all four sides of the top of the base plate (1), and positioning rods (311) are fixedly connected on all four sides of the bottom of the shielding cover (31), and the bottom of the positioning rod (311) extends to the inner cavity of the positioning hole (11) and is movably connected to the inner cavity of the positioning hole (11).

5. The current sensor for power detection according to claim 1, characterized in that: A through slot (321) is provided on one side of the connecting rod (32), and the connecting plate (35) passes through the inner cavity of the through slot (321) and is slidably connected to the inner cavity of the through slot (321).

6. The current sensor for detecting electric power according to claim 1, characterized in that: The back side of the screw sleeve (34) is fixedly connected to a limiting rod (341), the back side of the inner cavity of the connecting rod (32) is provided with a limiting groove (322), and one end of the limiting rod (341) away from the screw sleeve (34) extends to the inner cavity of the limiting groove (322) and is slidably connected to the inner cavity of the limiting groove (322).

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