Processing technology of external coil waterproof insulation winding structure for tank-type circuit breaker

Abstract

The invention relates to a processing technology of an external coil waterproof insulation winding structure for a tank-type circuit breaker, and the structure comprises an iron core, wires, 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. A first waterproof layer, a self-adhesive tape layer, a second waterproof layer and an anti-aging fixing layer are sequentially wrapped on the outer side of the third insulating layer from inside to outside, and the first waterproof layer and the second waterproof layer are of a semi-stacked wrapping structure when wrapped. The device has the advantages that the DMD film is used as the first insulating layer to wrap the outer side of the iron core and is wear-resistant and not easy to break; the electrical adhesive tape is used as a first waterproof layer and a second waterproof layer, and is wrapped in a semi-folding manner to form an effective sealing waterproof layer; a polyester film is adopted on the outermost side to prevent collision, aging and looseness of the inner wrapping layer; and the underwater sealant layer is coated on the periphery between the first waterproof layer and the self-adhesive tape layer at the root of the lead, so that the sealing effect is good.

Description

Technical Field

[0001] The present invention relates to the field of tank type circuit breaker production, and in particular to a processing technology for a waterproof insulation winding structure of an external coil for a tank type circuit breaker. Background Art

[0002] A tank circuit breaker is an enclosed switchgear consisting of a partition, a tank, an operating mechanism, a current transformer, and other components. During operation, current is transmitted through the contact connectors and connecting lines within the tank. When the power is off, the switch separates the contact connectors within the tank, isolating the circuit and achieving the purpose of isolating the circuit. As a key component, the current transformer's external coil has relatively high requirements for waterproof insulation performance, especially in special applications with high humidity and frequent condensation. There are currently some waterproof products on the market that are wrapped with polyester film or waterproof self-adhesive tape. However, when the polyester film is wrapped around the outer side of the innermost iron core of the external coil, the polyester film is easily worn and cut by the sharp corners of the iron core, making the wrapping operation difficult. Secondly, waterproof self-adhesive tape for waterproof insulation treatment cannot meet customer waterproofing requirements. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention proposes a processing technology for a waterproof insulation winding structure of an external coil for a tank type circuit breaker, which has a reasonable and compact design, good waterproof insulation effect, and meets customer needs.

[0004] The technical solution of the present invention: Processing technology of waterproof insulation winding structure of external coil for tank type circuit breaker, Step 1: Wrap a DMD film layer on the iron core; Step 2: Then, a wire is wrapped around the outside of the DMD film layer, and the layers of wire are separated by a polyester film layer; Step 3: Wrap the outer side of the outermost wire with a layer of polyester film; Step 4: Wrap a layer of electrical tape around the outer side of the polyester film layer, and wrap the electrical tape layer in a semi-overlapping wrapping manner; 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 bubbles; then, wrap the self-adhesive tape around the underwater sealant layer on the outside of the root of the secondary lead; Step 6: Wrap a layer of electrical tape around the outside of the self-adhesive tape layer again, and use a semi-overlapping wrapping method to wrap the electrical tape layer; Step 7: Wrap a layer of polyester film around the outermost layer of electrical tape.

[0005] Step 8: Sampling waterproof test: put the samples into 1m deep water in turn and soak them for 7 days. No water penetrates into the conductor layer and the insulation performance is qualified.

[0006] The self-adhesive tape is a self-adhesive tape with a width of more than 3 cm.

[0007] The conductive wire is an enameled wire.

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

[0009] The advantages of the present invention are: DMD film is used as the first insulation layer wrapped around the outside of the core, which is wear-resistant and not easy to break, meeting production needs; The electrical tape is used as the first and second waterproof layers, and is wrapped in a semi-stacked manner to form an effective sealing waterproof layer, which is low in cost and good in effect. The outermost layer is made of polyester film to protect the inner wrapping layer from collision, aging and loosening; The root of the lead wire is coated with an underwater sealant layer around the first waterproof layer and the self-adhesive tape layer, so the sealing effect of the root of the lead wire is good and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0011] Figure 2 It is a partial cross-sectional schematic diagram of the present invention. DETAILED DESCRIPTION

[0012] Refer to the attached Figure 1-2 The invention discloses an external coil waterproof insulation winding structure for a tank-type circuit breaker, which 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 outer side of the iron core 1 is wrapped with a first insulation layer 3, and the conductor 2 is wrapped around the outer side of the first insulation layer 3. The conductor 2 is wrapped in several layers, and each layer of the conductor 2 is isolated by providing a second insulation layer 4. The outer side of the outermost layer of the conductor 2 is wrapped with a third insulation layer 5. The outer side of the third insulation layer 5 is wrapped with a first waterproof layer 6, a self-adhesive tape layer 7, a second waterproof layer 8 and an anti-aging fixing layer 9 in sequence from the inside to the outside. The first waterproof layer 6 and the second waterproof layer 8 are wrapped in a semi-stacked winding 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 lead wires 10 at both ends of the conductor 2 are respectively led out through the third insulating 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 applied around the base of the lead wires 10 between the first waterproof layer 6 and the self-adhesive tape layer 7. The underwater sealant effectively improves the waterproof performance of the base of the lead wires, 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 more than 3 cm. The sealing effect is excellent when the width is more than 3 cm.

[0016] The self-adhesive tape is a waterproof type. The waterproof type further enhances the waterproof effect. At the same time, the self-adhesive tape effectively tightens the internal electrical tape to prevent it from loosening. Example

[0017] Processing technology of waterproof insulation winding structure of external coil for tank type circuit breaker, Step 1: Wrap a DMD film layer on the iron core; Step 2: Then, a wire is wrapped around the outside of the DMD film layer, and the layers of wire are separated by a polyester film layer; Step 3: Wrap the outer side of the outermost wire with a layer of polyester film; Step 4: Wrap a layer of electrical tape around the outer side of the polyester film layer, and wrap the electrical tape layer in a semi-overlapping wrapping manner; 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 bubbles; then, wrap the self-adhesive tape around the underwater sealant layer on the outside of the root of the secondary lead; Step 6: Wrap a layer of electrical tape around the outside of the self-adhesive tape layer again, and use a semi-overlapping wrapping method to wrap the electrical tape layer; Step 7: Wrap a layer of polyester film around the outermost layer of electrical tape.

[0018] Step 8: Sampling waterproof test: put the samples into 1m deep water in turn and soak them for 7 days. No water penetrates into the conductor layer and the insulation performance is qualified.

[0019] A common external coil with waterproof effect is purchased on the market, such as the sample of Control Example 1 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 1 meter underwater, soak for 7 days No water penetration Comparative Example 1 1 meter underwater, soak for 7 days Water seepage It can be seen from the above table that the external coil waterproof insulation winding structure for the tank type circuit breaker of the present invention has an excellent waterproof insulation effect and meets customer requirements.

Claims

1. A process for producing a waterproof insulation winding structure of an external coil for a tank type circuit breaker, characterized in that: Step 1: Wrap a DMD film layer on the iron core; Step 2: Then, a wire is wrapped around the outside of the DMD film layer, and the layers of wire are separated by a polyester film layer; Step 3: Wrap the outer side of the outermost wire with a layer of polyester film; Step 4: Wrap a layer of electrical tape around the outer side of the polyester film layer, and wrap the electrical tape layer in a semi-overlapping manner; 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 bubbles; then, wrap the self-adhesive tape around the underwater sealant layer on the outside of the root of the secondary lead; Step 6: Wrap a layer of electrical tape around the outside of the self-adhesive tape layer again, and use a semi-overlapping wrapping method to wrap the electrical tape layer; Step 7: Wrap a layer of polyester film around the outermost electrical tape layer; Step 8: Sampling waterproof test: put the samples into 1m deep water in turn and soak them for 7 days. No water penetrates into the conductor layer and the insulation performance is qualified.

2. The processing technology of the waterproof insulation winding structure of the external coil for the tank type circuit breaker according to claim 1 is characterized in that: The self-adhesive tape is a self-adhesive tape with a width of more than 3 cm.

3. The processing technology of the waterproof insulation winding structure of the external coil for the tank type circuit breaker according to claim 1 is characterized in that: The conductive wire is an enameled wire.

4. The processing technology of the waterproof insulation winding structure of the external coil for the tank type circuit breaker according to claim 1 is characterized in that: The self-adhesive tape is a waterproof self-adhesive tape.

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