Anti-interference high-frequency current sensor

Abstract

The invention discloses an anti-interference high-frequency current sensor, which comprises a current sensing main body lower part, a rotating shaft column, a current sensing main body upper part and a fastening bolt, a first positioning structure and a second positioning structure are optimally arranged, openings are formed in the top sides of a supporting plate, a fluted disc and a clamping assembly, a disc drives a gear piece to rotate under the action of a rotating position adjusting assembly, the fluted disc drives the clamping assembly to rotate on the side portion of the supporting plate, a wire is wrapped on the inner side of the clamping assembly after the wire is put into the clamping assembly, and the clamping assembly is prevented from rotating. The clamping assembly is arranged to prevent the wire from falling off, after the wire is placed in the clamping assembly, the wire is centrally clamped and positioned through the three pressing parts, the wire is ensured to be located in the center of the interior of the sensor, the sensor can adapt to wires with different diameters, and signal interference caused by movement of the wire can be reduced under the action of clamping and positioning. And meanwhile, the centrally-positioned electric wire can help to form a more uniform magnetic field, so that the induction efficiency of the sensor to the current is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of current sensors, in particular to an interference-resistant high-frequency current sensor. Background Art

[0002] A high-frequency current sensor is a detection device that can sense the information of the measured current and convert the sensed information into an electrical signal or other required form of information output that meets certain standards according to certain rules to meet the requirements of information transmission, processing, storage, display, recording and control.

[0003] At present, China's patent application number: CN202321120410.0 discloses an anti-interference high-frequency current sensor, including a high-frequency current sensor body, the bottom of which is fixedly connected to two supporting feet, the bottoms of the two supporting feet are connected to a base, the supporting feet are provided with mounting holes, a mounting column is slidably connected to the mounting hole, a mounting cavity is provided at the top of the mounting column, and a connector is plugged into the bottom of the mounting column.

[0004] However, during use, the position of the wires of the prior art anti-interference high-frequency current sensors is usually unstable, and it is inconvenient to be centrally positioned inside the sensor. When the wires move or shake under the influence of external forces, it is easy to cause fluctuations in the measurement signal, affecting the accuracy and stability of the measurement and reducing the sensor's sensing efficiency for current. Summary of the invention

[0005] The object of the present invention is to provide an interference-resistant high-frequency current sensor to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an anti-interference high-frequency current sensor, comprising a lower part of a current sensing body, a rotating shaft column, an upper part of a current sensing body, a fastening bolt, a first positioning structure and a second positioning structure, the top side of the rear part of the lower part of the current sensing body is connected to the upper part of the current sensing body through the rotating shaft column, and the top side of the front part of the lower part of the current sensing body is fastened to the upper part of the current sensing body through the fastening bolt, the left and right sides of the lower part of the current sensing body are fastened with the first positioning structure and the second positioning structure respectively, the first positioning structure comprises a support plate fastened to the lower part of the current sensing body at the bottom side, a rotation adjustment component installed at the lower left part of the support plate, a disc connected to the right side of the rotation adjustment component, a gear piece coaxially rotating in the middle part of the right side of the disc, a toothed disc meshing and transmitting on the top side of the gear piece, and a clamping component connected to the left side of the toothed disc, the middle part of the right side of the gear piece is rotatably connected to the support plate, the toothed disc is rotatably connected to the middle and upper part of the left side of the support plate, and the support plate, the toothed disc and the clamping component are all provided with openings on the top sides.

[0007] Preferably, the first positioning structure and the second positioning structure have the same structure and size, and are located in the middle of the lower part of the current sensor body and are arranged in an inversely symmetrical manner.

[0008] Preferably, an arrow indicating the installation direction of the current flow is provided on the top side of the upper portion of the current sensor body.

[0009] Preferably, convex rings are integrally formed on both left and right sides of the middle of the toothed disc, the convex ring on the right side is inserted and rotated inside the support plate, and the cross-section formed by the toothed disc and the convex ring is cross-shaped.

[0010] Preferably, the rotation adjustment assembly includes a worm, a first bearing plate and a second bearing plate respectively arranged on the upper and lower sides of the worm, a rotation head fixed to the bottom end of the worm, and a worm wheel meshingly transmitted to the rear side of the worm, the right sides of the first bearing plate and the second bearing plate are fixed to the support plate, and the middle right side of the worm wheel rotates coaxially with the disc.

[0011] Preferably, the clamping assembly includes a positioning block, a screw rod passing through and rotating on the inner side of the positioning block, a positioning column rotatably connected to the middle part of the rear side of the positioning block, an internal thread block threadedly connected to the outer surface of the screw rod, a support seat connected to the rear side of the internal thread block, a first pressure component arranged on the upper left side of the interior of the support seat, a second pressure component arranged on the upper right side of the interior of the support seat, and a third pressure component arranged on the bottom side of the interior of the support seat, the rear side of the positioning column is connected to the toothed disc, the rear side of the support seat is rotatably connected to the toothed disc, and the outer rear parts of the first pressure component, the second pressure component and the third pressure component are all fixed to the toothed disc.

[0012] Preferably, the support seat is a double-layered annular structure, and three arc-shaped through grooves are opened inside the connection of the double layers, and the first pressing component, the second pressing component and the third pressing component are respectively arranged through the inside of the three arc-shaped through grooves.

[0013] Preferably, a protrusion is provided at the rear right side of the support seat, and the middle side of the front part of the protrusion is rotatably connected to the internal thread block.

[0014] Preferably, the first pressing component, the second pressing component and the third pressing component have the same structure and size, and are arranged in sequence on the inner side of the support seat along the same direction.

[0015] Preferably, the first pressing component includes a limiting rod fixed to the toothed disc at the rear side, a rod frame rotatably connected to the front side of the limiting rod, a sleeve block wrapped and slid on the outer surface of the rod frame, and a pressure wheel arranged inside the right side of the sleeve block, and convex shafts are arranged in the middle of the front and rear sides of the sleeve block, and the two convex shafts are respectively inserted and rotated on the front and rear sides of the support seat.

[0016] Preferably, conductive materials are used to provide shielding for the outer shell or internal circuit of the lower part and the upper part of the current sensor body to reduce the impact of external electromagnetic interference, and the shielding layer is grounded so that the interference signal can be effectively introduced into the ground through the shielding layer, thereby achieving the effect of reducing interference.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention optimizes the arrangement of a first positioning structure and a second positioning structure of the same structure and size. The support plate, the toothed disc and the top side of the clamping assembly are all provided with openings. Under the action of the rotation adjustment assembly, the disc drives the gear plate to rotate, so that the toothed disc drives the clamping assembly to rotate at the side of the support plate, so that the wire is wrapped inside after being placed inside to prevent the wire from falling out. After the wire is placed inside the clamping assembly, three pressing components are used to achieve the center clamping and positioning of the wire, ensuring that the wire is located at the center position inside the sensor, and can adapt to wires of different diameters. Through the action of clamping and positioning, the signal interference caused by the movement of the wire can be reduced, ensuring the accuracy of the measurement. At the same time, the centrally positioned wire can help form a more uniform magnetic field, thereby improving the sensor's induction efficiency for current.

[0019] The top side of the upper part of the current sensor body of the present invention is provided with an arrow for indicating the installation direction of the current flow, and a conductive material is used to provide shielding for the housing or internal circuit of the lower part of the current sensor body and the upper part of the current sensor body to reduce the influence of external electromagnetic interference, and the shielding layer is grounded so that the interference signal can be effectively introduced into the ground through the shielding layer, thereby achieving the effect of reducing interference.

[0020] The toothed disc of the present invention has convex rings integrally formed on both sides of the left and right sides of the middle part. The convex ring on the right side is inserted and rotated inside the support plate. The cross-section formed by the toothed disc and the convex ring is cross-shaped to ensure the stability of the rotation of the toothed disc. At the same time, it plays a supporting and limiting role for the clamping assembly, thereby ensuring the stability of the rotation action of the clamping assembly.

[0021] The support seat of the present invention is provided with a protrusion at the rear right side, and the middle side of the front part of the protrusion is rotatably connected to the internal thread block, so that when the internal thread block moves, the support seat can be rotated through the protrusion. The first pressing component, the second pressing component and the third pressing component have the same structure and size, and are arranged in sequence on the inner side of the support seat in the same direction, so that the first pressing component, the second pressing component and the third pressing component can move at the same time to ensure the centering and stability of the wire clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 This is a schematic diagram of the installation position of the rotating shaft column of the present invention;

[0024] Figure 3 It is a structural schematic diagram of the first positioning structure of the present invention;

[0025] Figure 4 It is a structural schematic diagram of the rotation adjustment component of the present invention;

[0026] Figure 5 It is a schematic diagram of the structure of the clamping assembly of the present invention;

[0027] Figure 6 It is a schematic structural diagram of the first pressing component of the present invention.

[0028] In the figure: the lower part of the current sensor body -1, the shaft column -2, the upper part of the current sensor body -3, the fastening bolt -4, the first positioning structure -5, the second positioning structure -6, the arrow -31, the support plate -51, the rotation adjustment component -52, the disc -53, the gear plate -54, the toothed disc -55, the clamping component -56, the convex ring -551, the worm -521, the first bearing plate -522, the second bearing plate -523, the rotary head -524, the worm wheel -525, the positioning block -561, the screw -562, the positioning column -563, the internal thread block -564, the support seat -565, the first pressure component -566, the second pressure component -567, the third pressure component -568, the protrusion -5651, the limit rod -5661, the rod frame -5662, the sleeve block -5663, and the pressure wheel -5664. DETAILED DESCRIPTION

[0029] In order to further explain the technical solution of the present invention, it is described in detail below through specific embodiments.

[0030] See also Figure 1 and Figure 2The present invention provides an anti-interference high-frequency current sensor, comprising a current sensing body lower part 1, a rotating shaft column 2, a current sensing body upper part 3, a fastening bolt 4, a first positioning structure 5 and a second positioning structure 6. The top side of the rear portion of the current sensing body lower part 1 is connected to the current sensing body upper part 3 through the rotating shaft column 2, and the top side of the front portion of the current sensing body lower part 1 is fastened to the current sensing body upper part 3 through the fastening bolt 4, and can be disassembled so as to be installed outside the wire to monitor the current. The first positioning structure 5 and the second positioning structure 6 are fastened on the left and right sides of the current sensing body lower part 1, respectively. The first positioning structure 5 and the second positioning structure 6 have the same structure and size, and are located in the middle of the current sensing body lower part 1 in reverse symmetry. The shape of the sensor can firmly clamp the wire to ensure that the wire is located in the center of the sensor, and can adapt to wires of different diameters. Through the clamping and positioning effect, the signal interference caused by the movement of the wire can be reduced to ensure the accuracy of the measurement. At the same time, the centrally positioned wire can help form a more uniform magnetic field and improve the sensor's induction efficiency for current. An arrow 31 is provided on the top side of the upper part 3 of the current sensor body to indicate the installation direction of the current flow. Conductive material is used to provide shielding for the outer shell or internal circuit of the lower part 1 of the current sensor body and the upper part 3 of the current sensor body to reduce the influence of external electromagnetic interference, and the shielding layer is grounded so that the interference signal can be effectively introduced into the ground through the shielding layer to achieve the effect of reducing interference.

[0031] See also Figure 1 and Figure 3 The present invention provides an anti-interference high-frequency current sensor, wherein the first positioning structure 5 comprises a support plate 51 whose bottom side is fastened to the lower part 1 of the current sensor body, a rotation adjustment component 52 installed at the lower left part of the support plate 51, a disc 53 connected to the right side of the rotation adjustment component 52, a gear piece 54 coaxially rotating at the middle part of the right side of the disc 53, a toothed disc 55 meshingly transmitting at the top side of the gear piece 54, and a clamping component 56 connected to the left side of the toothed disc 55. Under the action of the rotation adjustment component 52, the disc 53 drives the gear piece 54 to rotate, and the gear piece 54 cooperates with the toothed disc 55 to drive the clamping component 56 to rotate at the side of the support plate 51. , so that the wires can be wrapped inside after being placed inside to prevent the wires from falling out. The middle part of the right side of the gear plate 54 is rotatably connected to the support plate 51, and the toothed disc 55 is rotatably connected to the middle and upper part of the left side of the support plate 51. The support plate 51, the toothed disc 55 and the top side of the clamping assembly 56 are all provided with openings to facilitate the placement of the wires inside. The left and right sides of the middle part of the toothed disc 55 are integrally formed with convex rings 551, and the convex ring 551 on the right side is inserted and rotated inside the support plate 51. The cross-section formed by the toothed disc 55 and the convex ring 551 is cross-shaped to ensure the stability of the rotation of the toothed disc 55, and at the same time, it plays a role of supporting and limiting the clamping assembly 56 to ensure the stability of the rotation of the clamping assembly 56.

[0032] See also Figure 3and Figure 4 The present invention provides an interference-resistant high-frequency current sensor. The rotation adjustment component 52 includes a worm 521, a first bearing sheet 522 and a second bearing sheet 523 respectively arranged on the upper and lower sides of the worm 521, a rotary head 524 fixed to the bottom end of the worm 521, and a worm wheel 525 meshingly driven on the rear side of the worm 521. The right sides of the first bearing sheet 522 and the second bearing sheet 523 are fixed to the support plate 51 to support the worm 521 and ensure the stability of the rotation of the worm 521. The middle part of the right side of the worm wheel 525 rotates coaxially with the disc 53. When the rotary head 524 is rotated, the worm 521 and the worm wheel 525 cooperate to drive the disc 53 to rotate.

[0033] See also Figure 3 , Figure 5 and Figure 6 The present invention provides an anti-interference high-frequency current sensor, wherein the clamping assembly 56 comprises a positioning block 561, a screw rod 562 which penetrates and rotates inside the positioning block 561, a positioning column 563 which is rotatably connected to the middle of the rear side of the positioning block 561, an internal thread block 564 which is threadedly connected to the outer surface of the screw rod 562, and a support seat 565 which is connected to the rear side of the internal thread block 564. When the screw rod 562 is rotated, the support seat 565 is driven by the internal thread block 564 to perform a displacement action, a first pressing component 566 which is arranged on the upper left side of the support seat 565, and a second pressing component 567 which is arranged on the upper right side of the support seat 565. And a third pressing component 568 is arranged on the bottom side of the support seat 565, the rear side of the positioning column 563 is connected to the toothed disc 55, and the rear side of the support seat 565 is rotatably connected to the toothed disc 55. The first pressing component 566, the second pressing component 567 and the outer rear sides of the third pressing component 568 are all fixed to the toothed disc 55 so that the support seat 565 does not produce relative movement with the toothed disc 55 when the toothed disc 55 rotates. When the screw 562 is rotated to shift the support seat 565, the first pressing component 566, the second pressing component 567 and the third pressing component 568 approach or move away from each other, thereby realizing the center clamping and positioning of the wire.

[0034] Among them, the support seat 565 is a double-layered annular structure, and three arc-shaped through grooves are opened on the inner side of the connection of the double layers. The first pressing component 566, the second pressing component 567 and the third pressing component 568 are respectively arranged through the inner sides of the three arc-shaped through grooves. A protrusion 5651 is arranged on the right rear part of the support seat 565. The middle side of the front part of the protrusion 5651 is rotatably connected with the internal thread block 564, so that when the internal thread block 564 moves, the support seat 565 can be rotated through the protrusion 5651. The first pressing component 566, the second pressing component 567 and the third pressing component 568 have the same structure and size, and are arranged in sequence on the inner side of the support seat 565 in the same direction, so that the first pressing component 566, the second pressing component 567 and the third pressing component 568 can move at the same time to ensure the centering and stability of the wire clamping.

[0035] Among them, the first pressing component 566 includes a limiting rod 5661 fixed to the toothed disc 55 on the rear side, a rod frame 5662 rotatably connected to the front side of the limiting rod 5661, a sleeve block 5663 wrapped and slid on the outer surface of the rod frame 5662, and a pressure wheel 5664 arranged inside the right side of the sleeve block 5663. A convex shaft is arranged in the middle of the front and rear sides of the sleeve block 5663, and the two convex shafts are respectively inserted and rotated on the front and rear sides of the support seat 565. When the support seat 565 rotates, it drives the sleeve block 5663 to change its position on the surface of the rod frame 5662, so that the rod frame 5662 drives the pressure wheel 5664 to move inward or outward. The pressure wheel 5664 moves inward to press and position the wire when it contacts the wire. After the pressure wheel 5664 moves outward, the limit on the wire is released, so that the wire can be moved out from the inside of the support seat 565.

[0036] The working principle of the anti-interference high-frequency current sensor of the present invention is as follows:

[0037] First, determine the current flow direction in the wire, and then make the position of the arrow 31 consistent with the current flow direction, wrap the current sensor body lower part 1 and the current sensor body upper part 3 around the outside of the wire and tighten them with the fastening bolt 4;

[0038] Second, put the wire into the clamping assembly 56 from the opening on the top side of the support plate 51, the toothed disc 55 and the clamping assembly 56 of the first positioning structure 5 and the second positioning structure 6, and then the user rotates the rotary head 524. When the rotary head 524 is rotated, the worm 521 and the worm wheel 525 cooperate to drive the disc 53 to rotate, and the disc 53 drives the gear plate 54 to rotate on the support plate 51. The gear plate 54 and the toothed disc 55 cooperate to make the toothed disc 55 and the clamping assembly 56 rotate to the side of the support plate 51, so that the toothed disc 55 and the clamping assembly 56 rotate to the opening above the support plate 51, and the wire is wrapped inside thereof;

[0039] Third, the user rotates the screw rod 562 again. When the screw rod 562 is rotated, the cooperation between the internal thread block 564 and the protrusion 5651 drives the support seat 565 to rotate at the side of the toothed disc 55. When the support seat 565 rotates, the sleeve block 5663 in the first pressing component 566, the second pressing component 567 and the third pressing component 568 changes its position on the surface of the rod frame 5662, so that the rod frame 5662 drives the pressing wheel 5664 to move inward. When the three pressing wheels 5664 are close to each other, the wires are pressed and positioned in the middle when they contact the wires, ensuring the centering stability of the wires.

[0040] Fourth, after the electric wire is positioned, the current inside the electric wire is monitored through the lower part 1 of the current sensing body and the upper part 3 of the current sensing body.

[0041] The above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An anti-interference high-frequency current sensor, comprising a current sensing body lower part (1), wherein the top side of the rear part of the current sensing body lower part (1) is connected to the current sensing body upper part (3) through a rotating shaft column (2), and the top side of the front part of the current sensing body lower part (1) is fastened to the current sensing body upper part (3) through a fastening bolt (4), characterized in that: The invention also comprises a first positioning structure (5) and a second positioning structure (6) respectively fastened to the left and right sides of the lower part (1) of the current sensor body, wherein the first positioning structure (5) comprises a support plate (51) fastened to the lower part (1) of the current sensor body at the bottom side, a rotation adjustment component (52) installed at the lower part of the left side of the support plate (51), a disc (53) connected to the right side of the rotation adjustment component (52), a gear plate (54) coaxially rotating at the middle part of the right side of the disc (53), a toothed disc (55) meshingly transmitting at the top side of the gear plate (54), and a clamping component (56) connected to the left side of the toothed disc (55), wherein the middle part of the right side of the gear plate (54) is rotationally connected to the support plate (51), the toothed disc (55) is rotationally connected to the upper middle part of the left side of the support plate (51), and the top sides of the support plate (51), the toothed disc (55) and the clamping component (56) are all provided with openings.

2. The anti-interference high-frequency current sensor according to claim 1, characterized in that: The first positioning structure (5) and the second positioning structure (6) have the same structure and size, and are located in the middle of the lower part (1) of the current sensor body and are arranged in an inversely symmetrical manner.

3. The anti-interference high-frequency current sensor according to claim 1, characterized in that: An arrow (31) for indicating the installation direction of current flow is arranged on the top side of the upper part (3) of the current sensor body.

4. The anti-interference high-frequency current sensor according to claim 1, characterized in that: The toothed disc (55) is integrally formed with convex rings (551) on both left and right sides of the middle part. The convex ring (551) on the right side is inserted and rotated inside the support plate (51). The cross section formed by the toothed disc (55) and the convex ring (551) is cross-shaped.

5. The anti-interference high-frequency current sensor according to claim 1, characterized in that: The rotation adjustment assembly (52) comprises a worm (521), a first bearing plate (522) and a second bearing plate (523) respectively arranged on the upper and lower sides of the worm (521), a rotation head (524) fixed to the bottom end of the worm (521), and a worm wheel (525) meshingly driven at the rear side of the worm (521), the right sides of the first bearing plate (522) and the second bearing plate (523) are both fixed to the support plate (51), and the middle right side of the worm wheel (525) rotates coaxially with the disc (53).

6. The anti-interference high-frequency current sensor according to claim 1, characterized in that: The clamping assembly (56) comprises a positioning block (561), a screw rod (562) which passes through and rotates inside the positioning block (561), a positioning column (563) which is rotatably connected to the middle part of the rear side of the positioning block (561), an internal thread block (564) which is threadedly connected to the outer surface of the screw rod (562), a support seat (565) connected to the rear side of the internal thread block (564), a first pressing component (566) which is arranged on the upper left side of the support seat (565), and a first pressing component (566) which is arranged on the inner side of the first pressing component (566). A second pressing component (567) is disposed on the upper right side of the support seat (565) and a third pressing component (568) is disposed on the bottom side of the support seat (565), the rear side of the positioning column (563) is connected to the toothed disc (55), the rear side of the support seat (565) is rotatably connected to the toothed disc (55), and the rear outer sides of the first pressing component (566), the second pressing component (567) and the third pressing component (568) are all fixed to the toothed disc (55).

7. The anti-interference high-frequency current sensor according to claim 6, characterized in that: The support seat (565) is a double-layered annular structure, and three arc-shaped through grooves are opened on the inner side of the connection between the double layers. The first pressing component (566), the second pressing component (567) and the third pressing component (568) are respectively arranged through the inner sides of the three arc-shaped through grooves.

8. The anti-interference high-frequency current sensor according to claim 6, characterized in that: A protrusion (5651) is provided at the rear right side of the support seat (565), and the middle side of the front part of the protrusion (5651) is rotatably connected to the internal thread block (564).

9. The anti-interference high-frequency current sensor according to claim 6, characterized in that: The first pressing component (566), the second pressing component (567) and the third pressing component (568) have the same structure and size and are arranged in sequence on the inner side of the support seat (565) along the same direction.

10. The anti-interference high-frequency current sensor according to claim 6, characterized in that: The first pressure component (566) includes a limiting rod (5661) fixed to the toothed disc (55) at the rear side, a rod frame (5662) rotatably connected to the front side of the limiting rod (5661), a sleeve (5663) wrapped and slid on the outer surface of the rod frame (5662), and a pressure wheel (5664) arranged inside the right side of the sleeve (5663), and the sleeve (5663) is provided with a convex shaft in the middle of the front and rear sides, and the two convex shafts are respectively inserted and rotatably connected to the front and rear sides of the support seat (565).

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