CN218037023U - Current sensor with double-layer shielding cover - Google Patents
Current sensor with double-layer shielding cover Download PDFInfo
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- CN218037023U CN218037023U CN202220530362.1U CN202220530362U CN218037023U CN 218037023 U CN218037023 U CN 218037023U CN 202220530362 U CN202220530362 U CN 202220530362U CN 218037023 U CN218037023 U CN 218037023U
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Abstract
The utility model relates to a current sensor with a double-layer shielding cover, which comprises an inner layer shielding cover, an outer layer shielding cover and a hollow shielding upper cover; the inner shielding cover is of a cylindrical structure with a lost upper surface, a U-shaped notch is formed in the upper edge of the cylindrical body of the inner shielding cover, the U-shaped notch is smoothly connected with the upper edge through a connecting arm, an annular base is arranged at the bottom of the inner shielding cover, and an inner penetrating hole is formed in the center of the annular base; the inner shielding cover and the annular base are of an integral structure, and the section of the outer edge of the annular base is an arc-shaped chamfer; the inner layer shielding cover of the utility model directly protects the internal circuit of the current sensor to form a first shielding layer, thus effectively shielding the influence of external interference on the magnetic induction component through the inner side of the shielding structure; the outer shielding cover directly protects the structure of the current sensor to form a second shielding layer, and the shielding effect is greatly superior to that of a single layer.
Description
Technical Field
The utility model belongs to the technical field of current sensor, concretely relates to take current sensor of double-deck shield cover.
Background
The current sensor is a current acquisition core component of the electric energy meter, is the premise of accurate measurement of the electric energy meter, and is used for measuring the magnitude of current so as to measure, monitor, alarm, control equipment and protect equipment. At present, current sensors in the market are not provided with shielding cases, and when the current sensors are installed in an environment with large electromagnetic field interference, the current sensors are easy to distort and have inaccurate precision. Therefore, the shielding effect of the current sensor structure shielding assembly is unsatisfactory, and due to the external structure of the current sensor, the shielding effect of the magnetic core and the magnetic field chip is poor, the magnetic flux leakage at the tip of the magnetic field is inevitable during work, and the influence on the magnetic induction assembly is avoided. Therefore, the prior art has certain structural problems, and cannot meet the anti-interference requirement of the ammeter, so that the metering precision of the ammeter is influenced.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model provides a current sensor with a double-layer shielding cover, the double-layer shielding cover structure is used for shielding the magnetic core and the magnetic field chip of the current sensor in a large area, the shielding effect is better, the inner shielding cover directly protects the internal circuit of the current sensor to form a first shielding layer, and the influence of external interference on a magnetic induction assembly through the inner side of the shielding structure is effectively shielded; the structure of outer shield cover direct protection current sensor itself forms the second shielding layer, and the interference that external environment formed is fallen in effectual shielding, and the external circuit interface is directly protected to the notch shielding dustcoat of shell for the information of current sensor receiving and dispatching obtains shielding outward completely, and the shielding effect is superior to the individual layer shielding effect greatly.
The technical scheme of the utility model is that: a current sensor with a double-layer shielding case comprises an inner layer shielding case, an outer layer shielding case and a hollow shielding upper cover;
the inner shielding cover is of a cylindrical structure with a lost upper surface, a U-shaped notch is formed in the upper edge of the cylindrical body of the inner shielding cover, the U-shaped notch is smoothly connected with the upper edge through a connecting arm, an annular base is arranged at the bottom of the inner shielding cover, and an inner penetrating hole is formed in the center of the annular base; the inner shielding cover and the annular base are of an integral structure, and the section of the outer edge of the annular base is an arc chamfer;
the outer layer shielding cover is an integrated structure formed by a shielding notch and a cylindrical structure with a missing upper surface, a U-shaped notch is formed in the upper edge of a cylinder of the outer layer shielding cover, the shielding notch is a cylindrical opening box with a missing surface, and two side surfaces of the cylindrical opening box are respectively and smoothly connected with two sides of the U-shaped notch through edge arcs to form a unified integrated structure; the bottom of the outer layer shielding case is provided with an outer ring-shaped base, and the outer ring-shaped base is provided with an outer layer penetrating hole which is consistent with the inner layer penetrating hole in size and shape;
be equipped with circular welt in the bottom of nexine shield cover circular welt is last to have inlayed ring form part the ring form part is equipped with the electric current and gathers the board electric current is gathered and has been pegged graft a probe on the board, be equipped with the electric current data acquisition chip on the probe.
An arc angle is arranged between the inner wall of the cylinder of the outer shielding case and the outer annular base, the radian of the arc angle is consistent with that of the arc chamfer, and the inner wall of the cylinder is connected with the outer annular base in a smooth mode through the arc angle.
The inner diameter of the cylindrical structure where the outer shielding cover is located is larger than or equal to the outer diameter of the cylindrical structure where the inner shielding cover is located, and the inner shielding cover can be nested in the outer shielding cover;
the inner height of the cylindrical structure where the outer shielding cover is located is smaller than or equal to the sum of the height of the cylindrical structure where the inner shielding cover is located and the thickness of the annular base.
The circular lining plate is made of insulating materials and is formed by fixing an outer circular edge, an inner circular frame, an arc-shaped clamping groove and reinforcing ribs, the inner circular frame is fixedly connected with the outer circular edge through the reinforcing ribs, the outer edge of the arc-shaped clamping groove is arranged on the outer circular edge, the radian of the outer edge of the arc-shaped clamping groove is the same as that of the outer circular edge, a protruding column is arranged inside the arc-shaped clamping groove, the cross section of the protruding column is rectangular,
the circular ring-shaped part is made of a magnetic core material and is provided with a rectangular data acquisition notch, the size of the rectangular data acquisition notch is the same as that of the protruding column, the thickness from the outer edge of the circular ring-shaped part to the inner edge of the circular ring-shaped part is equal to the width of the arc-shaped clamping groove, so that the circular ring-shaped part is clamped into the arc-shaped clamping groove, and a coil is wound outside the circular ring-shaped part.
The current acquisition board is composed of a U-shaped rectangular block and a circular ring piece, the U-shaped rectangular block and the circular ring piece are made of the same manufacturing material and pressed into an integral structure, an insertion hole is formed in the circular ring piece, the probe penetrates through the insertion hole through a clamping groove and enters the rectangular data acquisition notch, and a current acquisition circuit is arranged on the circular ring piece.
An interface circuit is arranged on the clamping groove in the insertion hole, and the current acquisition circuit is connected with the current data acquisition chip through the interface circuit.
The U-shaped rectangular block of the current acquisition board is provided with an external circuit interface, the external circuit interface is connected with the current acquisition circuit through a line interface circuit, and the size of the U-shaped rectangular block is consistent with the inside size of the shielding notch.
The shell is of an integrated structure formed by solidifying a notch shielding outer cover and an annular cylinder together, a hollow hole is formed in the center of the bottom of the annular cylinder, and the shielding notch is embedded in the notch shielding outer cover.
The cylindrical convex groove sequentially penetrates through the hollow hole, the outer layer penetrating hole, the inner layer penetrating hole and the circular ring piece to reach the central hole of the shielding upper cover.
The utility model discloses a the beneficial effect of the utility model:
1) The utility model discloses a structure carries out shielding by a large scale to current sensor's magnetic core and magnetic field chip, and shielding effect is better.
2) The utility model discloses an inner shield cover direct protection current sensor's internal circuit forms first shielding layer, and effectual shielding falls the influence that external disturbance produced magnetic induction component through shielding structure's inboard.
3) The outer shielding cover of the utility model directly protects the structure of the current sensor to form a second shielding layer, effectively shields the interference caused by the external environment,
4) The utility model discloses the external circuit interface is directly protected to the notch shielding dustcoat of shell for the information of current sensor receiving and dispatching obtains external shielding completely, and the shielding effect is superior to the individual layer shielding effect greatly.
Description of the drawings:
fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the overall assembly of the present invention;
FIG. 3 is a schematic view of the main shielding components of the present invention;
FIG. 4 is a schematic view of the outer shield of the present invention;
fig. 5 is a top view of the outer shield of the present invention;
fig. 6 is a schematic view of the installation of the circular lining plate of the present invention;
fig. 7 is a top view of the shielding upper cover of the present invention;
fig. 8 is a perspective view of the shielding upper cover of the present invention;
fig. 9 is a schematic view of the inner shield of the present invention;
FIG. 10 is a view showing the structure of the circular lining board of the present invention;
fig. 11 is a perspective view of the outer shield of the present invention;
fig. 12 is a schematic view of the installation of the inner shield of the present invention;
fig. 13 is a schematic view of the installation of the outer shield of the present invention;
in the figure, 1, a housing; 2. an outer shield; 3. an inner shield; 4. a circular liner plate; 5. an annular member; 6. a probe; 7. a current collection plate; 8. a shielding upper cover; 9. a shield notch; 10. a U-shaped notch; 11. a cylindrical convex groove; 12. an inner groove of the convex column; 13. an edge arc; 14. a rectangular inner wall; 15. an inner groove arc angle; 16. an upper edge; 17. connecting the foxes; 18. an annular base; 19. an arc-shaped clamping groove; 20. reinforcing ribs; 21. an inner annular frame; 22. an outer circular rim; 23. and (4) a raised column.
Detailed Description
Referring to fig. 1-13, the present invention relates to a current sensor with a double-layer shielding case, the double-layer shielding case of the current sensor comprises an inner shielding case (3), an outer shielding case (2) and a hollow shielding upper cover (8), the outer shielding case (2) and the shielding upper cover (8) can form a shielding whole, the inner shielding case (3) is arranged inside the outer shielding case (2); the inner shielding case (3) is of a cylindrical structure with a missing upper surface, a U-shaped notch (10) is formed in the upper edge of a cylinder of the inner shielding case (3), the U-shaped notch (10) is connected with the upper edge (16) through a connecting fox (17) in a smooth mode, an annular base (18) is arranged at the bottom of the inner shielding case (3), and an inner penetrating hole is formed in the center of the annular base (18); the inner shielding cover (3) and the annular base (18) are of an integral structure, and the section of the outer edge of the annular base (18) is an arc-shaped chamfer; the arc-shaped chamfer is consistent with the arc-shaped angle at the bottom of the outer shielding case (2) to form an embedded structure. The cylindrical convex groove (11) penetrates through the outer shell (1), the inner layer shielding cover (3) and the outer layer shielding cover (2) and extends out of the shielding upper cover (8), as shown in fig. 4, a rectangular convex column inner groove (12) is arranged in the cylindrical convex groove (11), the convex column inner groove (12) is a rectangular inner wall (14), a wire or a conductive copper bar to be detected penetrates through the convex column inner groove (12), and the outer part of the cylindrical convex groove (11) is in a three-dimensional shape with an inner groove arc angle (15); the three-dimensional shape is a three-dimensional body with two long sides being straight sides and two sides being circular arcs, the circular arcs on the two sides are concentric circles, and the diameter of the circular arcs is equal to the inner diameter of the hollow inner circle of the shielding upper cover (8). The inner diameter of the hollow inner circle is equal to the diameters of the outer penetrating hole of the outer shielding case (2) and the hollow circle at the bottom of the inner shielding case (3).
The outer layer shielding case (2) is an integrated structure formed by a shielding notch (9) and a cylindrical structure with a missing upper surface, a U-shaped notch is formed in the upper edge of the cylindrical body of the outer layer shielding case (2), the shielding notch (9) is a cylindrical opening box with a missing surface, and two side surfaces of the cylindrical opening box are respectively and smoothly connected with two sides of the U-shaped notch through edge arcs (13) to form a unified integral structure; the bottom of the outer layer shielding case (2) is an outer annular base which is provided with an outer layer penetrating hole with the size and the shape consistent with those of the inner layer penetrating hole;
be equipped with circular welt (4) in the bottom of nexine shield cover (3) circular welt (4) are gone up to have inlayed ring form part (5) are equipped with current acquisition board (7) a probe (6) has been pegged graft on current acquisition board (7), be equipped with the electric current data acquisition chip on probe (6).
An arc angle is arranged between the inner wall of the cylinder of the outer shielding case (2) and the outer annular base, the radian of the arc angle is consistent with that of the arc chamfer, and the arc angle enables the inner wall of the cylinder to be connected with the outer annular base in a smooth mode.
The inner diameter of the cylindrical structure where the outer shielding cover (2) is located is larger than or equal to the outer diameter of the cylindrical structure where the inner shielding cover (3) is located, and the inner shielding cover (3) can be nested in the outer shielding cover (2); the inner height of the cylindrical structure where the outer shielding cover (2) is located is less than or equal to the sum of the height of the cylindrical structure where the inner shielding cover (3) is located and the thickness of the annular base (18).
The round lining plate (4) is made of insulating materials and is formed by fixing an external round edge (22), an internal annular frame (21), an arc-shaped clamping groove (19) and a reinforcing rib (20), the internal annular frame (21) is fixedly connected with the external round edge (22) through the reinforcing rib (20), the external edge of the arc-shaped clamping groove (19) is arranged on the external round edge (22), the radian of the external edge of the arc-shaped clamping groove (19) is the same as that of the external round edge (22), a raised column (23) is arranged inside the arc-shaped clamping groove (19), and the cross section of the raised column (23) is rectangular,
the circular ring-shaped component (5) is made of a magnetic core material and is provided with a rectangular data acquisition notch, the size of the rectangular data acquisition notch is equal to that of the protruding column (23), the thickness from the outer edge of the circular ring-shaped component (5) to the inner edge of the circular ring-shaped component is equal to the width of the arc-shaped clamping groove (19), so that the circular ring-shaped component (5) is clamped into the arc-shaped clamping groove (19), and a coil is wound outside the circular ring-shaped component (5).
The current acquisition board (7) is composed of a U-shaped rectangular block and a circular ring piece, the U-shaped rectangular block and the circular ring piece are made of the same manufacturing material and pressed into an integral structure, an insertion hole is formed in the circular ring piece, the probe (6) penetrates through the insertion hole through a clamping groove and enters the rectangular data acquisition notch, and a current acquisition circuit is arranged on the circular ring piece. An interface circuit is arranged on the clamping groove in the insertion hole, and the current acquisition circuit is connected with the current data acquisition chip through the interface circuit.
The U-shaped rectangular block of the current acquisition board (7) is provided with an external circuit interface, the external circuit interface is connected with the current acquisition circuit through a line interface circuit, and the size of the U-shaped rectangular block is consistent with the inside size of the shielding notch (9). The shell (1) is of an integrated structure formed by solidifying a notch shielding outer cover and an annular cylinder together, a hollow hole is formed in the center of the bottom of the annular cylinder, and the shielding notch (9) is embedded into the notch shielding outer cover.
The cylindrical convex groove sequentially penetrates through the hollow hole, the outer layer penetrating hole, the inner layer penetrating hole and the circular ring piece to reach the central hole of the shielding upper cover.
The utility model discloses a structure carries out the shielding of large tracts of land to current sensor's magnetic core and magnetic field chip, and shielding effect is better. The utility model discloses an inner shield cover directly protects current sensor's internal circuit forms first shielding layer, and effectual shielding falls the influence that external interference produced to the magnetic induction subassembly through shielding structure's inboard, the utility model discloses a structure of outer shield cover direct protection current sensor itself forms the second shielding layer, and effectual shielding falls the interference that external environment formed, the utility model discloses the notch of shell shields the direct protection of dustcoat to external circuit interface for the information of current sensor receiving and dispatching obtains external shielding completely, and the shielding effect is superior to individual layer shielding effect greatly.
Claims (8)
1. A current sensor with a double-layer shielding case comprises an inner layer shielding case (3), an outer layer shielding case (2) and a hollow shielding upper cover (8), and is characterized in that;
the inner shielding case (3) is of a cylindrical structure with a missing upper surface, a U-shaped notch (10) is formed in the upper edge of a cylinder of the inner shielding case (3), the U-shaped notch (10) is smoothly connected with the upper edge (16) through a connecting fox (17), an annular base (18) is arranged at the bottom of the inner shielding case (3), and an inner penetrating hole is formed in the center of the annular base (18); the inner layer shielding cover (3) and the annular base (18) are of an integral structure, and the section of the outer edge of the annular base (18) is an arc-shaped chamfer;
the outer layer shielding case (2) is an integrated structure formed by a shielding notch (9) and a cylindrical structure with a missing upper surface, a U-shaped notch is formed in the upper edge of the cylindrical body of the outer layer shielding case (2), the shielding notch (9) is a cylindrical opening box with a missing surface, and two side surfaces of the cylindrical opening box are respectively and smoothly connected with two sides of the U-shaped notch through edge arcs (13) to form a unified integral structure; the bottom of the outer layer shielding case (2) is an outer annular base which is provided with an outer layer penetrating hole with the size and the shape consistent with those of the inner layer penetrating hole;
be equipped with circular welt (4) in the bottom of nexine shield cover (3) circular welt (4) are gone up to have inlayed ring form part (5) are equipped with current acquisition board (7) a probe (6) has been pegged graft on current acquisition board (7), be equipped with the electric current data acquisition chip on probe (6).
2. The current sensor with a double shield of claim 1, wherein: an arc angle is arranged between the inner wall of the cylinder of the outer shielding case (2) and the outer annular base, the radian of the arc angle is consistent with that of the arc chamfer, and the arc angle enables the inner wall of the cylinder to be connected with the outer annular base in a smooth mode.
3. The current sensor with a double shield of claim 2, wherein: the inner diameter of the cylindrical structure where the outer shielding cover (2) is located is larger than or equal to the outer diameter of the cylindrical structure where the inner shielding cover (3) is located, and the inner shielding cover (3) can be nested in the outer shielding cover (2);
the inner height of the cylindrical structure where the outer shielding cover (2) is located is less than or equal to the sum of the height of the cylindrical structure where the inner shielding cover (3) is located and the thickness of the annular base (18).
4. The current sensor with a double shield of claim 3, wherein: circular welt (4) are insulating material, are formed by outside circular border (22), inside annular frame (21), arc draw-in groove (19) and strengthening rib (20) are fixed, inside annular frame (21) passes through strengthening rib (20) with outside circular border (22) are connected together fixedly, the outer border of arc draw-in groove (19) sets up on outside circular border (22), the radian at the outer border of arc draw-in groove (19) with the radian at outside circular border (22) is the same, the inside of arc draw-in groove (19) is equipped with one protruding post (23), the cross-section of protruding post (23) is the rectangle.
5. The current sensor with double shielding according to claim 4, wherein: the circular ring-shaped component (5) is made of a magnetic core material and is provided with a rectangular data acquisition notch, the size of the rectangular data acquisition notch is equal to that of the protruding column (23), the thickness from the outer edge of the circular ring-shaped component (5) to the inner edge of the circular ring-shaped component is equal to the width of the arc-shaped clamping groove (19), so that the circular ring-shaped component (5) is clamped into the arc-shaped clamping groove (19), and a coil is wound outside the circular ring-shaped component (5).
6. The current sensor with a double shield of claim 5, wherein: the current acquisition board (7) is composed of a U-shaped rectangular block and a circular ring piece, the U-shaped rectangular block and the circular ring piece are made of the same manufacturing material and pressed into an integral structure, an insertion hole is formed in the circular ring piece, the probe (6) penetrates through the insertion hole through a clamping groove and enters the rectangular data acquisition notch, and a current acquisition circuit is arranged on the circular ring piece.
7. The current sensor with a double shield of claim 6, wherein: an interface circuit is arranged on the clamping groove in the insertion hole, and the current acquisition circuit is connected with the current data acquisition chip through the interface circuit.
8. The current sensor with a double shield of claim 6, wherein: the U-shaped rectangular block of the current acquisition board (7) is provided with an external circuit interface, the external circuit interface is connected with the current acquisition circuit through a line interface circuit, and the size of the U-shaped rectangular block is consistent with the inside size of the shielding notch (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220530362.1U CN218037023U (en) | 2022-03-12 | 2022-03-12 | Current sensor with double-layer shielding cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220530362.1U CN218037023U (en) | 2022-03-12 | 2022-03-12 | Current sensor with double-layer shielding cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218037023U true CN218037023U (en) | 2022-12-13 |
Family
ID=84340061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220530362.1U Active CN218037023U (en) | 2022-03-12 | 2022-03-12 | Current sensor with double-layer shielding cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218037023U (en) |
-
2022
- 2022-03-12 CN CN202220530362.1U patent/CN218037023U/en active Active
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