Dry-type iron core reactor core column grounding structure

Abstract

The utility model discloses a dry-type iron core reactor core column grounding structure, which relates to the technical field of reactors, and comprises iron core cakes, an air gap, an insulating cylinder, a grounding sheet and a grounding lead, the core column is formed by stacking a plurality of iron core cakes, the iron core cakes are formed by stacking silicon steel sheets, the air gap is arranged between two iron core cakes, and the insulating cylinder is arranged between the two iron core cakes. The insulating cylinder is located on the inner diameter side of the iron core cakes, one end of the grounding piece is inserted into a gap between silicon steel sheets of the iron core cakes, the grounding lead is welded to the end, away from the iron core cakes, of the grounding piece, the two ends of the grounding lead are each connected with a male and female butt joint terminal, and the grounding leads on the iron core cakes are connected through the male and female butt joint terminals. According to the utility model, the 187 male and female butt joint terminals are connected with the grounding lead, so that the production efficiency is improved, a good grounding effect is ensured, and the problem that the iron core discharges to the point of the coil is effectively prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of reactors, in particular to a core post grounding structure of a dry-type iron core reactor. Background Art

[0002] Reactors, as crucial electrical equipment in power systems, primarily limit short-circuit current, compensate for capacitive current, filter, and smooth out currents. Dry-type iron-core reactors, due to their compact size, high mechanical strength, flame retardancy, and ease of operation and maintenance, are widely used in urban power transmission and transformation systems, railway electrical networks, and metallurgy.

[0003] Traditional dry-type iron-core reactor core leg grounding leads need to be manually tightened, resulting in low production efficiency. Improper operation can easily lead to tip discharge breaking through the coil, and the specific discharge point is difficult to observe. In addition, manually tightened grounding wires are prone to falling off, causing local overheating of the iron core and poor grounding.

[0004] Based on this, a dry-type iron core reactor core grounding structure is now provided to eliminate the disadvantages of existing devices. Utility Model Content

[0005] The purpose of the utility model is to provide a dry-type iron core reactor core leg grounding structure to solve the problems in the background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A dry-type iron core reactor core leg grounding structure comprises an iron core cake, an air gap, an insulating cylinder, a grounding plate, and a grounding lead. The core leg is composed of a plurality of stacked iron core cakes, each of which is composed of stacked silicon steel sheets. The air gap is located between two iron core cakes, the insulating cylinder is located on the inner diameter side of the iron core cake, one end of the grounding plate is inserted into the gap between the silicon steel sheets of the iron core cakes, the grounding lead is welded to the end of the grounding plate away from the iron core cakes, and each end of the grounding lead is connected to a male and female butt connector terminal. The grounding leads on each iron core cake are connected using male and female butt connector terminals.

[0008] On the basis of the above technical solutions, the present invention also provides the following optional technical solutions:

[0009] In an optional solution, a notch is provided on the side wall of the insulating tube for the grounding plate to pass through, the notch on the insulating tube is larger than the width and thickness of the grounding plate, and the insulating tube is made of F-class epoxy board.

[0010] In an optional solution: the grounding plate is a tinned copper foil, the length of the grounding plate inserted into the iron core cake is 1 / 3 of the radial dimension of the iron core cake, and the length of the grounding plate extending from the inner diameter side of the iron core cake is less than 10 mm.

[0011] In an optional solution: the grounding lead is made of high-temperature copper wire, the middle part of the grounding lead is a bare copper wire with the outer skin removed, the bare copper wire in the middle of the grounding lead is welded to the grounding plate, and the two end parts of the grounding lead are copper wires with the outer skin removed and then tinned, and the copper wires at both end parts of the grounding lead are connected to male and female butt terminals.

[0012] In an optional solution: one end of the grounding lead is extended into the insulating tube and welded to the grounding plate on each iron core block, and the other end is led out from the upper end of the core column and connected to the added and subtracted grounding system.

[0013] In an optional solution: the male and female butt connector terminals are 187 male and female butt connector terminals, and the male and female butt connector terminals are equipped with insulating protective sleeves.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] The utility model improves production efficiency and ensures a good grounding effect by adopting 187 male and female butt joint terminals to connect the grounding lead, effectively preventing the problem of discharge from the iron core to the coil tip. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of one side of the utility model.

[0017] Figure 2 It is a structural diagram of the other side of the utility model.

[0018] Figure 3 It is a cross-sectional view of the present utility model.

[0019] Notes on the reference numerals: 1 iron core, 2 air gap, 3 insulation tube, 4 grounding plate, 5 grounding lead, 6 male and female butt terminals. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0021] In one embodiment, Figure 1 As shown, the core leg grounding structure of a dry-type iron core reactor includes an iron core cake 1, an air gap 2, an insulating cylinder 3, a grounding plate 4 and a grounding lead 5. The core leg is composed of a plurality of stacked iron core cakes 1, which are composed of stacked silicon steel sheets. The air gap 2 is located between two iron core cakes 1, the insulating cylinder 3 is located on the inner diameter side of the iron core cake 1, one end of the grounding plate 4 is inserted into the gap between the silicon steel sheets of the iron core cake 1, and the grounding lead 5 is welded to the end of the grounding plate 4 away from the iron core cake 1. After the core leg is assembled, the iron cakes at both ends and the air gap need to be solidified into one by using room temperature potting glue.

[0022] In this embodiment, a male and female butt connector terminal 6 is connected to each end of the grounding lead 5, and the grounding leads 5 on each core cake 1 are connected using male and female butt connector terminals 6. The grounding plate 4 and the grounding lead 5 are kept in the same upper and lower positions during installation, which facilitates the docking of the male and female butt connector terminals 6 during assembly.

[0023] In one embodiment, Figure 1 As shown, a notch is provided on the side wall of the insulating cylinder 3 for the grounding plate 5 to pass through. The notch on the insulating cylinder 3 is larger than the width and thickness of the grounding plate 4. The insulating cylinder is made of F-class epoxy board. The size of the notch on the insulating cylinder 3 must be strictly controlled to prevent the potting glue from flowing into the insulating cylinder 3.

[0024] In one embodiment, Figure 1 and Figure 2 As shown, the grounding plate 4 is a tinned copper foil. The length of the grounding plate 4 inserted into the iron core cake 1 is 1 / 3 of the radial dimension of the iron core cake 1, and the length of the grounding plate 4 extending from the inner diameter side of the iron core cake 1 is less than 10 mm. The grounding plate is inserted during the stacking process of the silicon steel sheets of the iron core cake 1. After the stacking of the silicon steel sheets of the iron core cake 1 is completed, the entire structure is vacuum cast into a radial shape, so that the grounding plate 5 is fixed in the iron core cake 1.

[0025] In one embodiment, Figure 1 and Figure 3 As shown, the grounding lead 5 is made of high-temperature copper wire. The middle part of the grounding lead 5 is a bare copper wire with the outer skin removed. The bare copper wire in the middle part of the grounding lead 5 is welded to the grounding plate 4. The two end parts of the grounding lead 5 are copper wires with the outer skin removed and then tinned. The copper wires at both ends of the grounding lead 5 are connected to the male and female butt terminals 6. Before welding the grounding lead 5 to the grounding plate 4, the welding part of the grounding lead 5 needs to be polished smooth.

[0026] In one embodiment, Figure 1 As shown, one end of the grounding lead 5 extends into the insulating tube 3 and is welded to the grounding plate 4 on each iron core cake 1, and the other end is led out from the upper end of the core column and connected to the grounding system of the clamp. The entire core column connects the iron core cakes 1 in series through the grounding lead 5, and is finally connected to the grounding system of the clamp to achieve reliable grounding of the core column.

[0027] In one embodiment, Figure 3 As shown, the male and female butt connector terminals 6 use 187 male and female butt connector terminals, and the male and female butt connector terminals 6 are equipped with insulating protective sleeves. After the grounding lead 5 is connected, the insulating protective sleeves need to be adjusted to a suitable position.

[0028] The above embodiment discloses a dry-type iron core reactor core leg grounding structure. During assembly, the grounding plate 4 is first inserted into the gap of the silicon steel sheets during the process of assembling the core cake 1 silicon steel sheets. Then, after the core cake 1 silicon steel sheets are assembled, the structure is formed into a radial shape by vacuum casting to firmly connect the grounding plate 4 to the core cake 1. Then, one end of the grounding lead 5 is welded to each grounding plate 4, and a male and female butt joint terminal 6 is connected to each end of the grounding lead 5. Finally, when assembling the core leg, the male and female butt joint terminals 6 of the grounding leads 5 on the upper and lower core cakes 1 are connected in sequence, and the insulating protective covers on the male and female butt joint terminals 6 are adjusted. Finally, the grounding lead 5 led out from the upper end of the core leg is connected to the grounding system of the core clamp.

[0029] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. Dry-type iron core reactor core grounding structure, including: An iron core cake (1), an air gap (2), an insulating tube (3), a grounding plate (4) and a grounding lead (5), wherein the core column is composed of a plurality of iron core cakes (1) stacked together, the iron core cake (1) is composed of a stack of silicon steel sheets, the air gap (2) is located between two iron core cakes (1), the insulating tube (3) is located on the inner diameter side of the iron core cake (1), one end of the grounding plate (4) is inserted into the gap between the silicon steel sheets of the iron core cake (1), and the grounding lead (5) is welded to the end of the grounding plate (4) away from the iron core cake (1); The invention is characterized in that the two ends of the grounding lead (5) are each connected to a male and female butt joint terminal (6), the grounding leads (5) on each iron core disk (1) are connected by the male and female butt joint terminal (6), the grounding lead (5) is made of high-temperature copper wire, the middle part of the grounding lead (5) is a bare copper wire with the outer skin removed, the bare copper wire in the middle of the grounding lead (5) is welded to the grounding plate (4), the two end parts of the grounding lead (5) are copper wires with the outer skin removed and then tinned, and the copper wires at the two end parts of the grounding lead (5) are connected to the male and female butt joint terminals (6).

2. The dry-type iron core reactor core grounding structure according to claim 1, characterized in that: A notch is provided on the side wall of the insulating cylinder (3) for the grounding plate (4) to pass through. The notch on the insulating cylinder (3) is larger than the width and thickness of the grounding plate (4). The insulating cylinder is made of a Class F epoxy board.

3. The dry-type iron core reactor core grounding structure according to claim 1, characterized in that: The grounding plate (4) is a tinned copper foil, the length of the grounding plate (4) inserted into the iron core cake (1) is 1 / 3 of the radial dimension of the iron core cake (1), and the length of the grounding plate (4) extending from the inner diameter side of the iron core cake (1) is less than 10 mm.

4. The dry-type iron core reactor core grounding structure according to claim 1, characterized in that: One end of the grounding lead (5) extends into the insulating tube (3) and is welded to the grounding plate (4) on each iron core block (1), and the other end is led out from the upper end of the core column and connected to the grounding system of the clamp.

5. The dry-type iron core reactor core grounding structure according to claim 1, characterized in that: The male and female butt joint terminals (6) adopt 187 male and female butt joint terminals, and the male and female butt joint terminals (6) are equipped with insulating protective sleeves.

Images