Current transformer iron core with magnetic saturation resistance

Abstract

The utility model discloses a current transformer iron core with magnetic saturation resistance characteristic, which comprises an iron core I and an iron core II, the iron core II is arranged on the outer side of the iron core I, air gap blocks are arranged in open slots of the iron core I and the iron core II, clamping slots are arranged on the iron core II on two sides of the air gap blocks, and the clamping slots are arranged on the iron core II. Clamping grooves are formed in the two sides of the first iron core, clamping blocks are arranged at the positions, corresponding to the clamping grooves, of the two sides of the air gap block, the air gap block is clamped with the clamping grooves of the second iron core through the clamping blocks, second insertion blocks are arranged on the two sides of the top and the two sides of the bottom of the first iron core, insertion grooves are formed in the inner sides, corresponding to the second insertion blocks, of the second iron core, and the corresponding second insertion blocks are inserted into the insertion grooves of the second iron core. According to the current transformer iron core with the magnetic saturation resistance characteristic, the saturation of the current transformer iron core with the magnetic saturation resistance characteristic is improved by replacing the air gap blocks of different sizes, the first iron core and the second iron core can be assembled and disassembled before and after use, and maintenance and replacement are convenient.

Description

Technical Field

[0001] This utility model relates to the field of current transformer core technology, specifically a current transformer core with anti-magnetic saturation characteristics. Background Technology

[0002] A current transformer consists of a closed iron core and windings. The function of a current transformer is to convert a large primary current into a smaller secondary current through a certain transformation ratio, which can be used for protection, measurement and other purposes.

[0003] As disclosed in application number 202120646483.8, a power transformer core with anti-DC bias magnetic characteristics includes a first core in a ring shape and a second core in a cylindrical shape. One end of the first core and one end of the second core are attached to form a cylindrical structure. The first core and the second core have the same thickness, and their outer and inner circumferences are on the same plane. A through groove penetrating the outer wall of the second core is provided along the length of the cylindrical wall. The through groove is a straight groove with a width of 0.1mm-0.3mm and a length equal to that of the second core. The same length allows for the combination of a first and second iron core made of different materials. The through-slot structure reduces the residual magnetism of the iron core during operation, avoiding the impact of DC components on the metering accuracy of the current transformer. Furthermore, the use of amorphous alloy instead of silicon steel sheets reduces product weight and cost. However, it still has some shortcomings in practical application. The size of its air gap cannot be adjusted, which does not improve its anti-magnetic saturation characteristics under different requirements. Also, the iron core cannot be assembled or disassembled during use, making maintenance and replacement relatively complicated. Utility Model Content

[0004] The purpose of this invention is to provide a current transformer core with anti-magnetic saturation characteristics to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a current transformer core with anti-magnetic saturation characteristics, comprising a core one and a core two, wherein the core two is provided on the outer side of the core one, and a through slot is provided in the middle of the core one. Both the core one and core two have slots at the middle of their tops, and air gap blocks are provided within the slots of the core one and core two. Slots are provided on both sides of the air gap blocks on the core two, and corresponding slots are provided on both sides of the air gap blocks. The air gap block is engaged with the slot of the second iron core by a locking block. The top and bottom sides of the first iron core are provided with two insertion blocks, and the inner side of the second iron core corresponding to each insertion block is provided with a slot. The slot of the second iron core is engaged with the corresponding insertion block, so that the operator can install different air gap blocks on the first and second iron cores. This makes it convenient to replace air gaps of different sizes according to needs, thereby improving antimagnetic saturation. Moreover, the first and second iron cores can be assembled and disassembled before and after use, which is convenient for maintenance and replacement.

[0006] Preferably, each of the two ends of the card block has an insertion hole at the middle position, and each of the card blocks has a screw in the corresponding slot. Each card block is inserted into the corresponding screw through the insertion hole, and each of the screws at the top of the card block is threaded with a nut so that the card block is inserted into the screw and fixed with the nut.

[0007] Preferably, both ends of the top of the air gap block are hinged with a baffle plate, and both ends of the bottom of the baffle plate are provided with snap blocks. The iron core corresponding to the baffle plate and the snap block is provided with a placement groove and a snap groove. Both ends of the bottom of the baffle plate are snapped into the snap groove through the snap block, so that the baffle plate blocks the slots on both sides of the air gap block, which facilitates subsequent winding.

[0008] Preferably, a rotating rod is provided at the middle position of the slot on the outer side of the second iron core, and a support block is provided on both sides of the bottom end of the rotating rod. The insertion block two corresponding to the support block at the bottom of the rotating rod is provided with a groove, and the insertion block two on the side of the groove near the first iron core is provided with a rotating groove, so that the support block at the bottom of the rotating rod is aligned with the groove and inserted into the rotating groove, and then rotated, so as to facilitate the connection and fixation of the rotating rod and the insertion block two.

[0009] Preferably, the top of each rotating rod is provided with a threaded section, and the outer side of the iron core corresponding to the threaded section of the rotating rod is provided with a rotating groove. The rotating rod in the rotating groove is connected to a nut by thread, so that after the rotating rod stops rotating, the nut can be screwed onto the rotating rod for fixed positioning.

[0010] Preferably, the outer side of the second iron core is provided with a protective layer, and the second iron core is divided into an upper end and a lower end.

[0011] Preferably, the upper end of the second iron core is provided with two insert blocks on both sides, and the upper end of the second iron core is connected to the lower end through the insert blocks and fixing bolts, so that the upper end and the lower end of the second iron core are inserted and fixed to prevent loosening.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: The current transformer core with anti-magnetic saturation characteristics can be fixed by aligning the air gap block and the two side locking blocks with the locking slots, inserting the locking blocks into the screw, and screwing the nuts onto the screw above the locking blocks. This allows for the replacement of different air gap blocks according to different needs, resulting in different air gap sizes inside the air gap blocks, thereby improving anti-magnetic saturation. Before assembly, the top and bottom locking blocks of core one can be aligned with the slots on core two, and the support block at the bottom of the rotating rod inside core two can be aligned with the groove of locking block two for insertion. Then, the support block at the bottom of the rotating rod is inserted into the rotating groove, and the rotating rod is rotated to drive the support block to rotate, so that the support block and the groove are interlocked and fixed, which facilitates the assembly and disassembly of core one and core two. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the front sectional view of the present invention;

[0014] Figure 2 This is a top sectional view of the present invention.

[0015] Figure 3 For the present utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0016] Figure 4 This is a top view of the insert block 2 and groove structure of this utility model;

[0017] In the diagram: 1. Iron core one; 2. Iron core two; 3. Protective layer; 4. Insert block one; 5. Air gap block; 6. Baffle plate; 7. Screw; 8. Slot; 9. Insert block two; 10. Rotating rod; 11. Rotating groove; 12. Through groove; 13. Card slot; 14. Snap-on groove; 15. Card block; 16. Snap-on block; 17. Rotating groove; 18. Groove. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0019] Please see Figure 1-4The present invention provides an embodiment of a current transformer core with anti-magnetic saturation characteristics, comprising a core 1 and a core 2, wherein the core 2 is provided on the outer side of the core 1 and a through groove 12 is provided in the middle of the core 1.

[0020] When using it, the material of iron core 1 should be permalloy, and the outer iron core 2 should be iron-nickel alloy, which can reduce the cost input.

[0021] Both iron core 1 and iron core 2 have slots at the middle of their tops, and air gap blocks 5 are provided in the slots of iron core 1 and iron core 2. Both sides of iron core 2 have slots 13, and both sides of iron core 1 and iron core 2 have blocks 15 at the corresponding positions of slots 13. The air gap blocks 5 are engaged with the slots 13 of iron core 2 through the blocks 15. Both ends of the blocks 15 have insertion holes at the middle of their ends, and both slots 13 have screws 7. The blocks 15 are engaged with the corresponding screws 7 through the insertion holes, and the screws 7 at the top of the blocks 15 are all connected with nuts by threads.

[0022] When in use, the air gap block 5 and the two side locking blocks 15 can be aligned with the locking slot 13 and placed down, so that the screw 7 inside the locking slot 13 can pass smoothly through the insertion hole of the locking block 15. The nut can be screwed onto the screw 7 above the locking block 15 to fix the locking block 15. It is convenient to replace different air gap blocks 5 according to different needs, so that the air gap size inside the air gap block 5 is different, thereby improving the antimagnetic saturation.

[0023] Both sides of the top and bottom of the iron core 1 are provided with insert blocks 2 9, and the inner side of the iron core 2 corresponding to the insert blocks 2 9 is provided with slots 8, and the slots 8 of the iron core 2 are all inserted into the corresponding insert blocks 2 9. The outer side of the iron core 2 is provided with a rotating rod 10 in the middle position corresponding to the slots 8, and the bottom of the rotating rod 10 is provided with support blocks on both sides. The insert blocks 2 9 corresponding to the bottom support blocks of the rotating rod 10 are provided with grooves 18, and the insert blocks 2 9 on the side of the grooves 18 close to the iron core 11 are provided with rotating grooves 11. The top of the rotating rod 10 is provided with a threaded section, and the outer side of the iron core 2 corresponding to the threaded section of the rotating rod 10 is provided with a rotating groove 17, and the rotating rod 10 in the rotating groove 17 is connected to a nut by threads.

[0024] In use, the top and bottom insert blocks 9 of iron core 1 can be aligned with the slots 8 on iron core 2. Then, the support block at the bottom of the rotating rod 10 inside iron core 2 can be aligned with the groove 18 of the insert block 9. Iron core 1 can be inserted into iron core 2, and the bottom end of the rotating rod 10 can be inserted into the rotating groove 11 of the insert block 9. Then, the rotating rod 10 can be rotated to drive the support block to rotate, so that the support block and the groove 18 are interlocked. The rotating rod 10 can be limited and fixed with a nut to prevent rotation and facilitate the assembly and disassembly of iron core 1 and iron core 2.

[0025] Both ends of the top of the air gap block 5 are hinged with a baffle plate 6, and both ends of the bottom of the baffle plate 6 are provided with a snap block 16. The iron core 2 corresponding to the baffle plate 6 and the snap block 16 is provided with a placement groove and a snap groove 14, and both ends of the bottom of the baffle plate 6 are snapped together with the snap groove 14 through the snap block 16.

[0026] When in use, the baffle plate 6 can be lowered by the hinge and placed flat on the placement groove of the iron core 2. Then, the snap block 16 and the snap groove 14 are aligned and pressed down to cover the slots 13 on both sides of the air gap block 5, which facilitates subsequent winding.

[0027] The outer side of the iron core 2 is provided with a protective layer 3, and the iron core 2 is divided into an upper end and a lower end in half. Both sides of the bottom of the upper end of the iron core 2 are provided with a first insert 4, and the upper end of the iron core 2 is connected to the lower end through the first insert 4 and the fixing bolt.

[0028] When in use, insert the upper end of iron core 2 onto iron core 1, then insert the lower end into its bottom, and then insert the insert blocks 4 on both sides of the bottom of the upper end of iron core 2 onto the lower end, and fix it with fixing bolts to prevent iron core 2 from becoming loose.

[0029] In this embodiment, by aligning the top and bottom insert blocks 9 of core 1 with the slots 8 on core 2, and then aligning the support block at the bottom of the rotating rod 10 inside core 2 with the groove 18 of insert block 9, core 1 can be inserted into core 2. The bottom end of the rotating rod 10 is inserted into the rotating groove 11 of insert block 9, and then the rotating rod 10 is rotated to drive the support block to rotate, so that the support block and the groove 18 are interlocked. Nuts are used to limit and fix the rotating rod 10 to prevent rotation, which facilitates the assembly and disassembly of core 1 and core 2. During insertion, insert blocks 4 on both sides of the bottom of the upper end of core 2 can be inserted into the lower end and fixed with fixing bolts to prevent core 2 from producing... If the air gap is loose, after it is properly connected, different air gap blocks 5 can be taken out as needed. Align the air gap block 5 and the two side locking blocks 15 with the locking slot 13 and put them down so that the screw 7 inside the locking slot 13 can pass smoothly through the insertion hole of the locking block 15. Then screw the nut on the screw 7 above the locking block 15 to fix the locking block 15. It is convenient to replace different air gap blocks 5 according to different needs, so that the air gap size inside the air gap block 5 is different, thereby improving the anti-magnetic saturation. After the air gap block 5 is installed, the shielding plate 6 can be lowered by the hinge and placed flat on the placement slot of the iron core 2. Then align the snap block 16 with the snap slot 14 and press it down to cover the locking slots 13 on both sides of the air gap block 5, which is convenient for subsequent winding.

[0030] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0031] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0032] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0033] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A current transformer core having an anti-magnetic saturation characteristic, characterized by: The system includes a first iron core (1) and a second iron core (2). The second iron core (2) is provided on the outer side of the first iron core (1). A through groove (12) is provided in the middle of the first iron core (1). A slot is provided in the middle of the top of both the first iron core (1) and the second iron core (2). An air gap block (5) is provided in the slot of the first iron core (1) and the second iron core (2). A slot (13) is provided on both sides of the second iron core (2). Both sides of the gap block (5) are provided with a card block (15) corresponding to the card slot (13), and the air gap block (5) is connected to the card slot (13) of the iron core two (2) through the card block (15). Both sides of the top and bottom of the iron core one (1) are provided with a second insertion block (9), and the inner side of the iron core two (2) corresponding to the second insertion block (9) is provided with a slot (8), and the slot (8) of the iron core two (2) is connected to the corresponding second insertion block (9).

2. The current transformer core with anti-magnetic saturation characteristics according to claim 1, characterized in that: The card block (15) has a socket at the middle position of both ends, and a screw (7) is provided in the corresponding slot (13) of the card block (15). The card block (15) is connected to the corresponding screw (7) through the socket, and a nut is connected to the screw (7) at the top of the card block (15) by thread.

3. The current transformer core with anti-magnetic saturation characteristics according to claim 1, characterized in that: Both ends of the top of the air gap block (5) are hinged with a baffle plate (6), and both ends of the bottom of the baffle plate (6) are provided with snap blocks (16). The iron core (2) corresponding to the baffle plate (6) and the snap block (16) is provided with a placement groove and a snap groove (14). Both ends of the bottom of the baffle plate (6) are connected to the snap groove (14) through the snap block (16).

4. The current transformer core with anti-magnetic saturation characteristics according to claim 1, characterized in that: A rotating rod (10) is provided at the middle position of the slot (8) on the outer side of the second iron core (2), and a support block is provided on both sides of the bottom end of the rotating rod (10). A groove (18) is provided on the second insertion block (9) corresponding to the bottom support block of the rotating rod (10), and a rotating groove (11) is provided in the second insertion block (9) on the side of the groove (18) close to the first iron core (1).

5. A current transformer core having an anti-magnetic saturation characteristic according to claim 4, characterized in that: The top of each rotating rod (10) is provided with a threaded section, and the outer side of the iron core (2) corresponding to the threaded section of the rotating rod (10) is provided with a rotating groove (17), and the rotating rod (10) in the rotating groove (17) is connected to a nut by a thread.

6. The current transformer core with anti-magnetic saturation characteristics according to claim 1, characterized in that: The outer side of the iron core (2) is provided with a protective layer (3), and the iron core (2) is divided into an upper end and a lower end.

7. The current transformer core with anti-magnetic saturation characteristics according to claim 1, characterized in that: Both sides of the bottom of the upper end of the iron core 2 (2) are provided with insert blocks 1 (4), and the upper end of the iron core 2 (2) is connected to the lower end through insert blocks 1 (4) and fixing bolts.

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