External coil waterproof insulation winding structure for tank circuit breaker

Abstract

This utility model relates to a waterproof and insulating winding structure for an external coil of a tank-type circuit breaker, comprising an iron core, a conductor, a first insulation layer, a second insulation layer, a third insulation layer, a first waterproof layer, a self-adhesive tape layer, a second waterproof layer, and an anti-aging fixing layer. The outermost conductor is wrapped with the third insulation layer. From the inside out, the third insulation layer is wrapped with the first waterproof layer, the self-adhesive tape layer, the second waterproof layer, and the anti-aging fixing layer. The first and second waterproof layers are wrapped in a semi-overlapping structure. The advantages are: using DMD film as the first insulation layer wrapped around the outside of the iron core, it is wear-resistant and not easily broken; electrical tape serves as the first and second waterproof layers, and the semi-overlapping method forms an effective sealed waterproof layer; the outermost polyester film protects the inner winding layers from impact, aging, and loosening; and an underwater sealant layer is coated around the base of the lead wire between the first waterproof layer and the self-adhesive tape layer, providing a good sealing effect.

Description

Technical Field

[0001] This utility model relates to the field of tank circuit breaker manufacturing, specifically to an external coil waterproof insulation winding structure for tank circuit breakers. Background Technology

[0002] A tank-type circuit breaker is a sealed switching device consisting of a partition, a tank, an operating mechanism, and a current transformer. During operation, current is transmitted through the contact connectors and connecting lines within the tank. When power is off, the switch operation separates the contact connectors within the tank, isolating the circuit. The current transformer, as a key component, has high requirements for waterproof insulation performance, especially in applications with high humidity and frequent condensation. While some waterproof products on the market use polyester film or waterproof self-adhesive tape for wrapping, the polyester film is easily worn away and cut by the sharp edges of the iron core, making wrapping difficult. Furthermore, waterproof self-adhesive tape alone cannot meet customer waterproofing requirements. Summary of the Invention

[0003] To address the aforementioned technical problems, this utility model proposes an external coil waterproof insulation winding structure for tank-type circuit breakers. The structure is reasonably compact, provides good waterproof insulation, and meets customer needs.

[0004] The technical solution of this utility model: The tank-type circuit breaker uses an external coil waterproof insulation winding structure, which includes an iron core, conductors, a first insulation layer, a second insulation layer, a third insulation layer, a first waterproof layer, a self-adhesive tape layer, a second waterproof layer, and an anti-aging fixing layer. The iron core is wrapped with a first insulation layer, and the conductors are wrapped around the outside of the first insulation layer. The conductors are wrapped in several layers, and each layer of conductors is isolated by a second insulation layer. The outermost conductor is wrapped with a third insulation layer. From the inside out, the third insulation layer is wrapped with the first waterproof layer, the self-adhesive tape layer, the second waterproof layer, and the anti-aging fixing layer. The first and second waterproof layers are wrapped in a semi-overlapping structure. The first insulation layer is a DMD film layer; the second, third, and anti-aging fixing layers are all polyester film layers; and the first and second waterproof layers are electrical tape layers.

[0005] The two leads of the conductor are respectively led out from the third insulation layer, the first waterproof layer, the self-adhesive tape layer, the second waterproof layer and the anti-aging fixing layer, and the root of the two leads is coated with an underwater sealant layer between the first waterproof layer and the self-adhesive tape layer.

[0006] The conductor in question is enameled wire.

[0007] The width of the self-adhesive tape is 3 centimeters or more.

[0008] The self-adhesive tape mentioned is a waterproof self-adhesive tape.

[0009] The advantages of this utility model are: 1. DMD film is used as the first insulating layer wrapped around the outside of the iron core, which is wear-resistant and not easy to break, meeting production requirements; 2. Electrical tape serves as both the first and second waterproof layers, and is wrapped in a semi-overlapping manner to form an effective sealing and waterproof layer, resulting in low cost and good performance; 3. The outermost layer is wrapped with polyester film to protect the inner layer from impacts, aging, and loosening; 4. An underwater sealant layer is applied around the base of the lead wire between the first waterproof layer and the self-adhesive tape layer, providing a good seal at the base of the lead wire and at a low cost. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the present invention.

[0011] Figure 2 This is a partial cross-sectional view of the present invention. Detailed Implementation

[0012] See attached document Figure 1-2 The external coil waterproof insulation winding structure of the tank-type circuit breaker includes an iron core 1, a conductor 2, a first insulation layer 3, a second insulation layer 4, a third insulation layer 5, a first waterproof layer 6, a self-adhesive tape layer 7, a second waterproof layer 8, and an anti-aging fixing layer 9. The iron core 1 is wrapped with a first insulation layer 3. The conductor 2 is wrapped with several layers of the first insulation layer 3. Each layer of conductor 2 is isolated by a second insulation layer 4. The outermost conductor 2 is wrapped with a third insulation layer 5. From the inside out, the third insulation layer 5 is wrapped with the first waterproof layer 6, the self-adhesive tape layer 7, the second waterproof layer 8, and the anti-aging fixing layer 9. The first waterproof layer 6 and the second waterproof layer 8 are wrapped in a semi-overlapping structure. The first insulation layer 3 is a DMD film layer. The second insulation layer 4, the third insulation layer 5, and the anti-aging fixing layer 9 are all polyester film layers. The first waterproof layer 6 and the second waterproof layer 8 are electrical tape layers.

[0013] The two leads 10 of the conductor 2 are respectively led out from the third insulation layer 5, the first waterproof layer 6, the self-adhesive tape layer 7, the second waterproof layer 8, and the anti-aging fixing layer 9. A layer of underwater sealant is coated around the base of the leads 10 between the first waterproof layer 6 and the self-adhesive tape layer 7. The underwater sealant effectively improves the waterproof performance of the lead base, provides good sealing performance, and is low in cost.

[0014] The conductor 2 is an enameled wire.

[0015] The width of the self-adhesive tape is 3 cm or more. A width of 3 cm or more provides excellent sealing.

[0016] The self-adhesive tape mentioned is a waterproof type. The waterproof nature further enhances its waterproof effect, while also effectively securing the internal electrical tape and preventing it from loosening. Example

[0017] The manufacturing process of the waterproof insulation winding structure of the external coil for tank-type circuit breakers. Step 1: Wrap a layer of DMD thin film around the iron core; Step two, then the wires are wrapped around the outside of the DMD film layer, and the layers of the wires are separated by a polyester film layer; Step 3: Wrap another layer of polyester film around the outermost conductor; Step 4: Wrap an electrical tape layer around the outside of the polyester film layer. The electrical tape layer is wrapped using a semi-overlapping wrapping method. Step 5: Wrap a layer of self-adhesive tape around the outside of the electrical tape layer; when the self-adhesive tape layer reaches the root of the secondary lead, apply a layer of underwater sealant to the outside of the electrical tape around the root of the secondary lead, ensuring that the root of the lead is sealed without air bubbles; then wrap the self-adhesive tape around the underwater sealant layer outside the root of the secondary lead. Step 6: Wrap another layer of electrical tape around the outside of the self-adhesive tape layer, using a semi-overlapping wrapping method. Step 7: Wrap a layer of polyester film around the outermost layer of electrical tape.

[0018] Step 8: Sampling and waterproofing test. Immerse the samples in water at a depth of 1m in sequence. If no water penetrates to the conductor layer after 7 days, the insulation performance is qualified.

[0019] Purchase one common waterproof external coil from the market, as shown in the table below. The table below is a comparison table of waterproof tests conducted on the sample of Example 1 according to customer requirements.

[0020] sample Waterproof test Test results Example 1 Soaking at 1 meter depth for 7 days No water permeation Compare with Example 1 Soaking at 1 meter depth for 7 days Water seeped in As can be seen from the table above, the external coil waterproof insulation winding structure of the tank-type circuit breaker of this utility model has excellent waterproof insulation effect and meets customer requirements.

Claims

1. An external coil waterproof insulation winding structure for a tank circuit breaker, characterized in that, It includes an iron core, conductors, a first insulation layer, a second insulation layer, a third insulation layer, a first waterproof layer, a self-adhesive tape layer, a second waterproof layer, and an anti-aging fixing layer. The iron core is wrapped with a first insulation layer, and the conductors are wrapped around the outside of the first insulation layer. The conductors are wrapped in several layers, and each layer of conductors is isolated by a second insulation layer. The outermost conductor is wrapped with a third insulation layer. From the inside out, the third insulation layer is wrapped with the first waterproof layer, the self-adhesive tape layer, the second waterproof layer, and the anti-aging fixing layer. The first and second waterproof layers are wrapped in a semi-overlapping structure. The first insulation layer is a DMD film layer. The second insulation layer, the third insulation layer, and the anti-aging fixing layer are all polyester film layers; the first waterproof layer and the second waterproof layer are electrical tape layers; the two leads of the conductor are respectively led out from the third insulation layer, the first waterproof layer, the self-adhesive tape layer, the second waterproof layer, and the anti-aging fixing layer, and the roots of the two leads are coated with an underwater sealant layer around the periphery between the first waterproof layer and the self-adhesive tape layer; the conductor is enameled wire; the width of the self-adhesive tape is more than 3 cm; the self-adhesive tape is a waterproof self-adhesive tape.

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