Diverter capable of improving alternating magnetic field resistance

Abstract

The utility model relates to a shunt capable of improving alternating magnetic field resistance. The shunt comprises a conducting strip and a sampling terminal, the conductive sheets comprise a first conductive sheet and a second conductive sheet. The first conducting strip comprises a first connecting end, a first wiring end and a sampling resistor area. The sampling resistor area comprises a through hole and an insertion block. The second conducting strip comprises a second conducting strip body, a second connecting end and a second wiring end. The sampling terminal comprises a first terminal and a second terminal. A first terminal and a second terminal which are of a symmetrical structure are arranged. The first segment and the second terminal are connected with the external equipment in an abutting mode, connection through a cable and other modes is not needed, connection is convenient, and operation is easy. The second terminals and the first terminals are arranged in an offset mode, and the induced current of the second terminals is matched so that the induced current of the second terminals and the induced current of the two first terminals can be counteracted. Therefore, the shunt has high practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of current devices, in particular to a shunt for improving the ability to resist alternating magnetic fields. Background Art

[0002] A shunt is used to measure direct current. It is made based on the principle that when direct current passes through a resistor, a voltage is generated across the resistor.

[0003] The existing shunt is vulnerable to magnetic field interference. To solve this technical problem, for example, Chinese patent CN201420109280.5 discloses a new type of alternating magnetic field resistant manganese copper shunt, which includes the sampling endpoints of the manganese copper resistor body of the shunt. A wire is provided on one side of the shunt. A sampling endpoint is provided on both sides of the shunt close to the manganese copper resistor body. A sampling wire is connected to the sampling endpoint. A through hole is provided in the manganese copper resistor body. One of the sampling wires passes through the through hole to the other side, dividing the manganese copper resistor body into two regions with the same area. The sampling wire is connected and fixed to the sampling endpoint on this side. At the same time, the two sampling wires on this side are fixed and spirally twisted and extended. Heat shrinkable sleeves are sleeved on the heads and tails of the two sampling wires respectively. A silica gel sleeve is sleeved on the sampling wire passing through the through hole. In this technical solution, when the external alternating magnetic field interferes, an induced voltage and electromotive force are generated on the sampling wire pulled to the other side close to the manganese copper resistor body, and they are balanced with the induced voltage and electromotive force generated on the manganese copper resistor, thus preventing the interference of the alternating magnetic field on the shunt.

[0004] Although the above solution can prevent the interference of the alternating magnetic field on the shunt, the maintenance of the shunt is inconvenient. If one end is damaged, the entire shunt needs to be replaced, and wiring is required for connection to external devices, with cumbersome operations. Summary of the Utility Model

[0005] In view of this, the utility model provides a shunt for improving the ability to resist alternating magnetic fields to solve the above technical problems.

[0006] A shunt for improving the ability to resist alternating magnetic fields, which includes a conductive sheet and a set of sampling terminals arranged on the conductive sheet. The conductive sheet includes a first conductive sheet and a second conductive sheet connected to one end of the first conductive sheet. The first conductive sheet includes a first connection end arranged at one end, a first connection terminal arranged at the other end, and a sampling resistance area arranged between the first connection end and the first connection terminal. The sampling resistance area includes a plurality of through holes arranged at intervals and a plurality of plug-in blocks arranged around the through holes. Three of the through holes are arranged along the length direction of the first conductive sheet. Two first plug-in blocks are respectively arranged on both sides of the through holes in the sampling resistance area. A second plug-in block is arranged between the first connection terminal and the sampling resistance area. The second conductive sheet includes a second conductive sheet body, a second connection end arranged at one end of the second conductive sheet body, and a second connection terminal arranged at the other end of the second conductive sheet body. The sampling terminals include two symmetrically structured first terminals and a second terminal. The two first terminals are respectively inserted into the two first plug-in blocks, and the second terminal is inserted into the second plug-in block. The second plug-in block is arranged between the through hole and the side of the first conductive sheet, that is, the second plug-in block and the first plug-in block are offset. The size of the second terminal is larger than that of the first terminal.

[0007] Further, the first connection end is bent at 90 degrees.

[0008] Further, the first connection terminal is bent at 90 degrees, and the horizontal planes of the first connection terminal and the first connection end are perpendicular to each other.

[0009] Further, the shape of the plug-in block is a rectangular block.

[0010] Further, the sampling resistance area is recessed on the end face of the first conductive sheet facing away from the second conductive sheet.

[0011] Further, the two first plug-in blocks are arranged along the length direction of the first conductive sheet.

[0012] Further, a groove is arranged between the sampling resistance area and the first connection terminal.

[0013] Further, a bevel is arranged on one side of the groove close to the sampling resistance area.

[0014] Compared with the prior art, the shunt provided by the present utility model for improving the ability to resist alternating magnetic fields is configured such that the conductive sheet is the first conductive sheet, and a second conductive sheet connected to one end of the first conductive sheet. This allows for the replacement of components on one side separately when one side is damaged, facilitating maintenance and replacement, and reducing the usage cost. The sampling terminals are provided, and the sampling terminals include two symmetrically structured first terminals and a second terminal. The free ends of the first terminals and the second terminal are arranged on the same horizontal plane. The first terminals and the second terminal are connected in contact with external devices, eliminating the need for connection via cables or other means, facilitating connection and simplifying operation. The second terminal is offset from the first terminals, and the induced current of the second terminal itself is used to cancel out the induced currents on the two first terminals. Therefore, the shunt has high practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 FIG. is a schematic structural diagram of a shunt provided by the present utility model for improving the ability to resist alternating magnetic fields.

[0016] Figure 2 is Figure 1 a schematic structural diagram of another perspective of the shunt for improving the ability to resist alternating magnetic fields.

[0017] Figure 3 is Figure 1 a schematic structural diagram of another perspective of the shunt for improving the ability to resist alternating magnetic fields. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following further details the specific embodiments of the present utility model. It should be understood that the description of the embodiments of the present utility model herein does not limit the protection scope of the present utility model.

[0019] As Figures 1 to 3 shown, it is a schematic structural diagram of a shunt provided by the present utility model for improving the ability to resist alternating magnetic fields. The shunt for improving the ability to resist alternating magnetic fields includes a conductive sheet 10 and a set of sampling terminals 20 arranged on the conductive sheet 10. It can be envisioned that the shunt for improving the ability to resist alternating magnetic fields further includes some other functional structures, such as copper gaskets, heat shrink tubes, etc., which are well-known technologies in the art and will not be elaborated herein.

[0020] The conductive sheet 10 includes a first conductive sheet 11 and a second conductive sheet 12 connected to one end of the first conductive sheet 11.

[0021] The first conductive sheet 11 includes a first connection end 111 disposed at one end, a first connection terminal 112 disposed at the other end, and a sampling resistor region 113 disposed between the first connection end 111 and the first connection terminal 112.

[0022] The first connection end 111 is bent at 90 degrees for connection with the second conductive sheet 12.

[0023] The first connection terminal 112 is bent at 90 degrees, and the horizontal plane of the first connection terminal 112 is perpendicular to that of the first connection end 111. The first connection terminal 112 is used to connect to an external power supply. The relationship between the horizontal planes of the first connection terminal 112 and the first connection end 111 can also be at other angles, such as acute angle, obtuse angle, parallel, etc.

[0024] The sampling resistor region 113 is recessed on the end face of the first conductive sheet 11 facing away from the second conductive sheet 12. Three through holes 114 are arranged at intervals in the middle region and both side edges of the sampling resistor region 113. The three through holes 114 are arranged along the length direction of the first conductive sheet 11. The through holes 114 can change the current flow path and reduce the electromagnetic induction effect. The number of the through holes 114 can be designed according to actual requirements, and the number in this embodiment is three.

[0025] Two first insertion blocks 115 are respectively arranged on both sides of the through hole 114 in the sampling resistor region 113. The two first insertion blocks 115 are arranged along the length direction of the first conductive sheet 11. A second insertion block 116 is arranged between the first connection terminal 112 and the sampling resistor region 113. The second insertion block 116 is arranged between the through hole 114 and the side edge of the first conductive sheet 11, that is, the second insertion block 116 and the first insertion block 115 are offset.

[0026] The first insertion block 115 and the second insertion block 116 are both used for inserting the sampling terminal 20 and improving the anti-alternating ability, which will be described in combination with the sampling terminal 20 below. The shapes of the first insertion block 115 and the second insertion block 116 are rectangular blocks, and can also be designed into cylindrical or polygonal shapes, etc., to meet different requirements.

[0027] A groove 117 is arranged between the sampling resistor region 113 and the first connection terminal 112. A bevel is arranged on one side of the groove 117 close to the sampling resistor region 113, which is convenient for guiding the wire into the groove 117 during wire winding and wiring.

[0028] The second conductive sheet 12 includes a second conductive sheet body 121, a second connection end 122 provided at one end of the second conductive sheet body 121, and a second connection terminal 123 provided at the other end of the second conductive sheet body 121.

[0029] The second conductive sheet body 121 is bent along its middle part to adapt to the structure of the housing. It can be imagined that the shape of the second conductive sheet body 121 can be, for example, a straight plate type according to actual needs. The second connection end 122 is attached to the first connection end 111 to fix the first conductive sheet 11 and the second conductive sheet 12 together. The split design facilitates the separate replacement and repair of a part of them, making maintenance convenient.

[0030] The second connection end 122 is used to connect to an external power supply, so as to cooperate with the first connection end 112 to form a current path.

[0031] The sampling terminal 20 is provided on the sampling resistor area 113. The sampling terminal 20 includes two first terminals 21 with a symmetrical structure and a second terminal 22.

[0032] The two first terminals 21 are respectively inserted into the two first plug-in blocks 115. The second terminal 22 is inserted into the second plug-in block 116. When the first terminal 21 and the second terminal 22 are respectively inserted into the first plug-in block 115 and the second plug-in block 116, the ends of the first terminal 21 and the second terminal 22 are on the same horizontal plane, which is convenient for directly contacting and connecting to external devices through the first terminal 21 and the second terminal 22. The size of the second terminal 22 is larger than that of the first terminal 21, so that the current on the second terminal 22 is greater than the current on the first terminal 21. And since the first plug-in block 115 and the second plug-in block 116 are offset, the second terminal 22 is also offset relative to the first terminal 21. By the offset setting, the current path can be changed, the magnetic field distribution when the current passes through the first terminal 21 and the second terminal 22 can be changed, the generation of induced current can be reduced, and the anti-alternating performance can be improved.

[0033] In use, the first terminal 21 and the second terminal 22 are abutted against an external device. When in contact with the external device, an induced current is generated in the two first terminals 21 themselves and in the area between the two first terminals 21. A through hole 114 is provided between the two first terminals 21, and the flow path of the current between the two first terminals 21 is changed through the through hole 114, reducing the generation of eddy currents between the two first terminals 21, thereby reducing the generation of induced current on the sampling resistor area 113. Then, since there is a gap between the second plug block 116 and the first plug block 115, an induced current is also generated between the second terminal 22 and the first terminal 21. And since a through hole 114 is provided between the second terminal 22 and the first terminal 21, the flow path of the current from the first terminal 21 to the second terminal 22 is changed, thereby reducing the generation of induced current. Then, since the second terminal 22 and the first terminal 21 are offset, and the offset setting can change the path of the current from the first terminal 21 to the second terminal 22, changing the magnetic field distribution and reducing the generation of induced current. Since the size of the second terminal 22 is larger than that of the first terminal 21, the current on the second terminal 22 is greater than the current on the first terminal 21. Subsequently, the induced current on the second terminal 22 is greater than the induced current on a single first terminal 21, so that the induced current on the second terminal 22 can cancel out the induced currents on the two first terminals 21.

[0034] Compared with the prior art, the shunt provided by the utility model for improving the anti-alternating magnetic field ability is provided by arranging the conductive sheet 10 into the first conductive sheet 11 and a second conductive sheet 12 connected to one end of the first conductive sheet 11. When one side is damaged, the components on one side can be replaced separately, which is convenient for maintenance and replacement, and reduces the use cost. The sampling terminal 20 is provided, and the sampling terminal 20 includes two symmetrically structured first terminals 21 and a second terminal 22. The free ends of the first terminal 21 and the second terminal 22 are arranged on the same horizontal plane, and are connected to an external device in abutting connection through the first section 21 and the second terminal 22, without the need to be connected by means of cables or the like, which is convenient for connection and simple to operate. The through hole 114 is arranged between the first terminal 21 and the second terminal 22 to change the current path, thereby changing the magnetic field distribution and reducing the generation of induced current. The size of the second terminal 22 is set to be larger than that of the first terminal 21, so that the induced current on the second terminal 22 is greater than the induced current on a single first terminal 21. The second terminal 22 and the first terminal 21 are offset from each other to change the current path, thereby changing the magnetic field distribution on the first terminal 21 and the second terminal 22 and reducing the generation of induced current. The induced current on the second terminal 22 cancels out the induced current on the two first terminals 21 to improve the anti-alternating magnetic field ability of the shunt.

[0035] The above are only the preferred embodiments of the present utility model and are not used to limit the protection scope of the present utility model. Any modifications, equivalent replacements or improvements within the spirit of the present utility model are all covered by the claims of the present utility model.

Claims

1. A shunt for improving the ability to resist alternating magnetic fields, characterized in that: The shunt for improving the ability to resist alternating magnetic fields comprises a conductive sheet and a group of sampling terminals arranged on the conductive sheet, wherein the conductive sheet comprises a first conductive sheet and a second conductive sheet connected to one end of the first conductive sheet, wherein the first conductive sheet comprises a first connecting end arranged at one end, a first wiring terminal arranged at the other end, and a sampling resistor area arranged between the first connecting end and the first wiring terminal, wherein the sampling resistor area comprises a plurality of through holes arranged at intervals, and a plurality of plug-in blocks arranged around the through holes, wherein the three through holes are arranged along the length direction of the first conductive sheet, and two first plug-in blocks are respectively arranged on both sides of the through holes in the sampling resistor area, wherein the first plug-in blocks are arranged at the two sides of the through holes in the sampling resistor area, and ... A second plug-in block is arranged between the first wiring terminal and the sampling resistance area. The second conductive sheet includes a second conductive sheet body, a second connection terminal arranged at one end of the second conductive sheet body, and a second wiring terminal arranged at the other end of the second conductive sheet body. The sampling terminal includes two first terminals with symmetrical structures and a second terminal. The two first terminals are respectively inserted into the two first plug-in blocks, and the second terminal is inserted into the second plug-in block. The second plug-in block is arranged between the through hole and the side of the first conductive sheet, that is, the second plug-in block is offset from the first plug-in block, and the size of the second terminal is larger than that of the first terminal.

2. The shunt for improving the ability to resist alternating magnetic fields as claimed in claim 1, characterized in that: The first connecting end is bent 90 degrees.

3. The shunt for improving the ability to resist alternating magnetic fields as claimed in claim 1, characterized in that: The first wiring terminal is bent at 90 degrees, and the horizontal planes of the first wiring terminal and the first connecting end are perpendicular to each other.

4. The shunt for improving the ability to resist alternating magnetic fields as claimed in claim 1, characterized in that: The plug-in block is in the shape of a rectangular block.

5. The shunt for improving the ability to resist alternating magnetic fields as claimed in claim 1, characterized in that: The sampling resistance region is recessed and arranged on an end surface of the first conductive sheet facing away from the second conductive sheet.

6. The shunt for improving the ability to resist alternating magnetic fields as claimed in claim 1, characterized in that: The two first plug-in blocks are arranged along the length direction of the first conductive sheet.

7. The shunt for improving the ability to resist alternating magnetic fields as claimed in claim 1, characterized in that: A groove is arranged between the sampling resistance area and the first wiring terminal.

8. The shunt for improving the ability to resist alternating magnetic fields as claimed in claim 7, characterized in that: A groove is arranged on one side of the groove close to the sampling resistance area.

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