Improved high-voltage mutual inductor coil

Abstract

The utility model relates to the technical field of high-voltage mutual inductors, and discloses an improved high-voltage mutual inductor coil which comprises an iron core, the iron core is shaped like a Chinese character'hui ', a secondary winding coil is wound on the top edge of the iron core, a primary winding coil is wound on the outer circle wall face of the secondary winding coil, and a sponge strip is arranged on the outer wall face of the iron core. A fixing structure is arranged on the outer wall face of the iron core. According to the utility model, through the arrangement of the fixing structure, after a worker adheres a sponge strip to the outer wall surface of the iron core, the two fixing frames are close to each other to wrap the outer wall surface of the iron core, then the two supporting plates are connected through bolts, and the bolts are tightened to enable the left and right inner walls of the two fixing frames to abut against and fix the sponge strip; and then a worker rotates a bolt at the mounting plate, so that the bolt of the mounting plate abuts against the bottom surface of the fixing frame, and the movable plate abuts against and fixes a sponge strip on the top surface of the iron core, and in the mode, the durability of fixing the sponge strip is improved, and the use effect of the high-voltage mutual inductor coil is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of high - voltage transformers, in particular to an improved high - voltage transformer coil. Background Art

[0002] A high - voltage transformer is a transformer applicable to the 1kV to 220kV power system, which converts a large voltage into a small voltage or a large current into a small current for easy measurement, protection, and use. It is mainly used in AC circuits to monitor the operation of electrical equipment and control systems, and is used to supply power to the voltage coils and current coils of measuring instruments and relays respectively, correctly reflecting the normal operation and fault conditions of electrical equipment.

[0003] An existing improved high - voltage transformer coil (Publication No.: CN217822333U) has at least the following drawbacks: The above - mentioned device fixes the sponge strip on the iron core through an adhesive layer, and then uses a rubber band to tie and press the sponge strip to keep the sponge strip in close contact with the iron core. However, during long - term use, the rubber band is affected by temperature and environment and is prone to aging and breaking, resulting in the rubber band being difficult to permanently fix the sponge strip, and further leading to poor use effect of the high - voltage transformer coil. For this reason, we propose the present utility model. Content of the Utility Model

[0004] The purpose of the present utility model is to solve the drawbacks existing in the prior art, and to propose an improved high - voltage transformer coil.

[0005] In order to achieve the above - mentioned purpose, the present utility model adopts the following technical solutions:

[0006] An improved high - voltage transformer coil includes an iron core. The iron core is in a "return" shape. A secondary winding coil is wound around the top edge of the iron core, and a primary winding coil is wound around the outer circumferential wall of the secondary winding coil. A sponge strip is arranged on the outer wall of the iron core, and a fixing structure is arranged on the outer wall of the iron core. The fixing structure includes two fixing frames which are arranged oppositely, and the inner wall surfaces of the two fixing frames are in contact with the outer wall surface of the sponge strip.

[0007] As a further scheme of the present utility model, movable plates are rotatably arranged at the tops of the two fixing frames. Fixing rods are hinged on both sides of each movable plate. An installation plate is arranged between the two fixing rods. The installation plate is located below the fixing frame. A bolt is threadedly connected to the bottom surface of the installation plate, and the top end of the bolt abuts against the bottom surface of the fixing frame. Support plates are fixedly arranged at the bottom surfaces of the two fixing frames, and the two support plates are connected by bolts.

[0008] As a further scheme of the present utility model, the installation plate is rotatably arranged at the bottom end of the front - side fixing rod, and a clamping notch is formed on one side of the installation plate, and the clamping notch is detachably clamped with the bottom end of the rear - side fixing rod.

[0009] As a further solution of the present utility model, an insulating paper is fixed between the iron core and the secondary winding coil, and an epoxy resin layer is fixed between the secondary winding coil and the primary winding coil.

[0010] As a further solution of the present utility model, two primary terminals are fixed on the outer circumferential wall surface of the primary winding coil, and two secondary terminals are fixed on the inner circumferential wall surface of the secondary winding coil.

[0011] As a further solution of the present utility model, both of the two support plates are L-shaped and are arranged opposite to each other.

[0012] Compared with the prior art, the present utility model has the following beneficial effects:

[0013] For this current transformer coil, through the setting of the fixing structure, after the staff bonds the sponge strip on the outer wall surface of the iron core, the two fixing frames are moved closer to wrap the outer wall surface of the iron core, and then the two support plates are connected by bolts. Tightening the bolts makes the left and right inner walls of the two fixing frames press against and fix the sponge strip. Then the staff rotates the bolt at the mounting plate to make the mounting plate bolt press against the bottom surface of the fixing frame, thereby pulling the movable plate through the fixing rod to make the movable plate press against and fix the sponge strip on the top surface of the iron core. Through the above method, the durability of the fixing of the sponge strip is improved, the service life of the high-voltage current transformer coil is extended, and the use effect of the high-voltage current transformer coil is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 FIG. is a schematic structural diagram of an improved high-voltage current transformer coil proposed by the present utility model;

[0015] Figure 2 FIG. is a schematic exploded structural diagram of an improved high-voltage current transformer coil proposed by the present utility model;

[0016] Figure 3 FIG. is a schematic exploded structural diagram of the iron core of an improved high-voltage current transformer coil proposed by the present utility model;

[0017] Figure 4 FIG. is a schematic exploded structural diagram of the fixing frame of an improved high-voltage current transformer coil proposed by the present utility model.

[0018] In the figure: 1, iron core; 2, secondary winding coil; 201, fixing frame; 202, movable plate; 203, fixing rod; 204, mounting plate; 205, support plate; 3, primary winding coil; 301, clamping notch; 4, sponge strip; 401, insulating paper; 402, epoxy resin layer; 5, primary terminal; 501, secondary terminal. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In order to make the technical means, creative features, achieved objectives and functions realized by the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0020] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0022] As Figures 1 - 4 shown, an improved high-voltage transformer coil includes an iron core 1. The iron core 1 is in a "return" shape. A secondary winding coil 2 is wound around the top side of the iron core 1. A primary winding coil 3 is wound around the outer wall surface of the secondary winding coil 2. A sponge strip 4 is provided on the outer wall surface of the iron core 1. A fixing structure is provided on the outer wall surface of the iron core 1. The fixing structure includes two fixing brackets 201. The two fixing brackets 201 are arranged opposite to each other. The inner wall surfaces of the two fixing brackets 201 are in contact with the outer wall surface of the sponge strip 4.

[0023] In this embodiment, movable plates 202 are rotatably arranged at the tops of two fixing frames 201. Fixing rods 203 are hinged on both sides of the movable plates 202. An installation plate 204 is arranged between the two fixing rods 203. The installation plate 204 is located below the fixing frame 201. A bolt is threadedly connected to the bottom surface of the installation plate 204, and the top end of the bolt abuts against the bottom surface of the fixing frame 201. Support plates 205 are fixedly arranged on the bottom surfaces of the two fixing frames 201, and the two support plates 205 are connected by bolts. Through the setting of the fixing structure, after the staff adheres the sponge strip 4 to the outer wall surface of the iron core 1, the two fixing frames 201 are moved closer to each other to wrap the outer wall surface of the iron core 1. Then, the two support plates 205 are connected by bolts. The bolts are tightened so that the left and right inner walls of the two fixing frames 201 abut and fix the sponge strip 4. Then, the staff rotates the bolt at the installation plate 204 to make the bolt of the installation plate 204 abut against the bottom surface of the fixing frame 201, thereby pulling the movable plate 202 through the fixing rod 203 to make the movable plate 202 abut and fix the sponge strip 4 on the top surface of the iron core 1. Through the above method, the durability of the fixing of the sponge strip 4 is improved, the service life of the high-voltage transformer coil is prolonged, and the use effect of the high-voltage transformer coil is ensured.

[0024] In this embodiment, the installation plate 204 is rotatably arranged at the bottom end of the fixing rod 203 at the front side. A clamping notch 301 is formed on one side of the installation plate 204, and the bottom end of the fixing rod 203 at the rear side is detachably clamped in the clamping notch 301. The fixing frame 201, the movable plate 202 and the installation plate 204 are all made of polyimide material and have high-temperature resistant insulation performance. When the staff disassembles and assembles the fixing structure, the two bolts can be screwed out, and the installation plate 204 is rotated to make the bottom end of the fixing rod 203 at the rear side slide out of the clamping notch 301, so that the fixing structure can be quickly disassembled and assembled.

[0025] In this embodiment, an insulating paper 401 is fixed between the iron core 1 and the secondary winding coil 2, and an epoxy resin layer 402 is fixed between the secondary winding coil 2 and the primary winding coil 3. The insulating paper 401 and the epoxy resin layer 402 are both prior arts. Through the insulating paper 401 and the epoxy resin layer 402, the electric field can be isolated and distributed, preventing breakdown between the high-voltage part and the low-voltage part.

[0026] In this embodiment, two primary terminals 5 are fixed on the outer circumferential wall surface of the primary winding coil 3, and two secondary terminals 501 are fixed on the inner circumferential wall surface of the secondary winding coil 2. The primary terminals 5 introduce the power supply into the primary winding coil 3. Through the transformation ratio of the secondary winding coil 2, the secondary terminals 501 convert the input high-voltage signal into the output voltage required by the design.

[0027] In this embodiment, both of the two support plates 205 are L-shaped, and the two support plates 205 are arranged oppositely. The two oppositely arranged support plates 205 can stably support the iron core 1 inside the transformer housing.

[0028] Working principle: During use, after the staff bonds the sponge strip 4 to the outer wall surface of the iron core 1, the two fixing brackets 201 are moved closer to each other to wrap the outer wall surface of the iron core 1. Then, the two support plates 205 are connected by bolts. The bolts are tightened so that the left and right inner walls of the two fixing brackets 201 press against and fix the sponge strip 4. Then, the staff rotates the bolt at the mounting plate 204 so that the bolt of the mounting plate 204 presses against the bottom surface of the fixing bracket 201, thereby pulling the movable plate 202 through the fixing rod 203 to press against and fix the sponge strip 4 on the top surface of the iron core 1. When the staff disassembles and assembles the fixing structure, the two bolts can be unscrewed, and the mounting plate 204 is rotated so that the bottom end of the fixing rod 203 at the rear slides out of the clamping notch 301, and then the fixing structure can be quickly disassembled and assembled. The insulating paper 401 and the epoxy resin layer 402 can isolate and distribute the electric field to prevent breakdown between the high-voltage part and the low-voltage part. The primary terminal 5 introduces the power supply into the primary winding coil 3. Through the turns ratio of the secondary winding coil 2, the secondary terminal 501 converts the input high-voltage signal into the output voltage required by the design. The two oppositely arranged support plates 205 can stably support the iron core 1 inside the transformer housing.

[0029] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An improved high-voltage transformer coil, comprising an iron core (1), characterized in that: The iron core (1) is in a "U" shape, a secondary winding coil (2) is wound around the top edge of the iron core (1), a primary winding coil (3) is wound around the outer circumferential wall of the secondary winding coil (2), a sponge strip (4) is provided on the outer wall of the iron core (1), and a fixing structure is provided on the outer wall of the iron core (1), the fixing structure comprising two fixing frames (201), the two fixing frames (201) being arranged opposite to each other, and the inner wall surfaces of the two fixing frames (201) being in contact with the outer wall surface of the sponge strip (4).

2. The improved high-voltage transformer coil according to claim 1, characterized in that: The top ends of the two fixing frames (201) are both rotatably provided with movable plates (202), both sides of the movable plates (202) are hinged with fixed rods (203), a mounting plate (204) is provided between the two fixed rods (203), the mounting plate (204) is located below the fixing frames (201), the bottom surface of the mounting plate (204) is threadedly connected with bolts, the top ends of the bolts abut against the bottom surface of the fixing frames (201), the bottom surfaces of the two fixing frames (201) are both fixed with support plates (205), and the two support plates (205) are connected by bolts.

3. The improved high-voltage transformer coil according to claim 2, characterized in that: The mounting plate (204) is rotatably arranged with the bottom end of the fixing rod (203) located at the front side, and a clamping notch (301) is provided on one side of the mounting plate (204), and the clamping notch (301) is detachably clamped with the bottom end of the fixing rod (203) located at the rear side.

4. The improved high-voltage transformer coil according to claim 3, characterized in that: Insulation paper (401) is fixed between the iron core (1) and the secondary winding coil (2), and an epoxy resin layer (402) is fixed between the secondary winding coil (2) and the primary winding coil (3).

5. The improved high-voltage transformer coil according to claim 4, characterized in that: Two primary terminals (5) are fixed on the outer circular wall surface of the primary winding coil (3), and two secondary terminals (501) are fixed on the inner circular wall surface of the secondary winding coil (2).

6. The improved high-voltage transformer coil according to claim 5, characterized in that: The two support plates (205) are both L-shaped, and the two support plates (205) are arranged opposite to each other.

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