A 35kv and below cable lapping fusion splice and fusion process

Abstract

The application provides a 35KV and below cable wrapping fusion type intermediate joint, and relates to the technical field of cable connection. The intermediate joint comprises a cable body, a conductor wire core arranged in the cable body, a connecting mechanism, an insulation mechanism and a waterproof mechanism. The connecting mechanism comprises a conductor connecting pipe, the conductor connecting pipe is pressure connected with the two conductor wire cores to form a pressure connection part, the insulation mechanism comprises a first wrapping body, the first wrapping body is arranged on the pressure connection part to form a wrapping fusion body, and the first wrapping body is matched with the cable body. The waterproof mechanism comprises an armored layer, the armored layer is arranged on the cable body, and the armored layer is provided with filling glue. The intermediate joint has high insulation performance and improves the safety factor of cable line operation. In addition, the application also provides a fusion process of the 35KV and below cable wrapping fusion type intermediate joint, which can achieve the same beneficial effects as the above.

Description

Technical Field

[0001] This invention relates to the field of cable connection technology, and more specifically, to a 35KV and below cable wrapping fusion splicing intermediate joint and fusion splicing process. Background Technology

[0002] Cable joints come in six types: wrapping, injection molding (or molding), hot melt, heat shrinking, cold shrinking, and prefabrication. Due to the increasing demand for convenience in factory production and on-site installation, hot melt technology was forgotten for a period of time.

[0003] Injection molding (or hot melt molding) technology uses a fixed mold and XLPE granules for on-site casting and cross-linking. Its advantages are simple operation, but its disadvantages are insufficient flexibility, large dispersion of raw materials, unstable cross-linking, the need for a fixed mold on-site, easy to be affected by external mechanical factors, and difficulty in ensuring its electrical properties, such as eccentricity, degree of cross-linking, and residual by-products.

[0004] Because the wrapped joint is made by wrapping on site, its finished electrical performance cannot meet the dielectric loss performance requirements of the cross-linked polyethylene cable body material. Summary of the Invention

[0005] The purpose of this invention is to provide a 35KV and below cable wrapping fusion splice intermediate joint, which has high insulation performance and improves the safety factor of cable line operation.

[0006] Another objective of this invention is to provide a welding process for a 35KV and below cable wrapping fusion splicing intermediate joint, which can achieve the same beneficial effects as described above.

[0007] The embodiments of the present invention are implemented as follows:

[0008] In a first aspect, embodiments of this application provide a 35KV and below cable wrapping fusion splice intermediate joint, which includes a cable body, a conductor core disposed within the cable body, characterized in that it further includes a connection mechanism, an insulation mechanism, and a waterproof mechanism:

[0009] The connection mechanism includes a conductor connecting tube, which is crimped with two conductor cores to form a crimped part;

[0010] The insulation mechanism includes a first wrapping body, which is disposed on the crimping part to form a wrapping fusion body, and the first wrapping body is matched with the cable body;

[0011] The waterproofing mechanism includes an armor layer, which is installed on the cable body and contains filler adhesive.

[0012] In some embodiments of the present invention, a semiconductor filler is provided between the conductor connecting tube and the conductor core.

[0013] In some embodiments of the present invention, the above-mentioned pressing portion is configured as a smooth surface.

[0014] In some embodiments of the present invention, the crimping portion is provided with a second wrapping body.

[0015] In some embodiments of the present invention, the above-mentioned wrapping weld body is provided with a semiconductor coating.

[0016] In some embodiments of the present invention, the semiconductor coating is provided with a third wrapping body.

[0017] In some embodiments of the present invention, the cable body is further provided with a copper mesh, and the cable body is connected with copper braided wire.

[0018] In some embodiments of the present invention, the copper mesh is provided with a self-adhesive tape layer, a sealant is provided between the self-adhesive tape layer and the copper mesh, a PVC tape layer is provided outside the self-adhesive tape layer, an armor layer is provided on the PVC tape layer, and a filler is provided between the armor layer and the PVC tape layer.

[0019] Secondly, embodiments of this application provide a welding process for a 35KV and below cable wrapping fusion splice intermediate joint, which includes the aforementioned 35KV and below cable wrapping fusion splice intermediate joint, comprising the following steps:

[0020] S1, strip the main insulation core of the cable body to expose the conductor core of the cable body, strip the outer shielding layer of the conductor core, and crimp the stripped conductor core to the conductor core using a conductor connecting tube, and grind and polish the surface of the crimped part.

[0021] S2, clean the exposed conductor core and conductor connecting tube, and fill the gap between the conductor core and conductor connecting tube with semiconductor filler;

[0022] S3 uses a semiconductor vulcanized tape to wrap the conductor connecting tube and the conductor core in two layers to complete the surface smoothing of the connection part, thereby forming an inner shielding layer;

[0023] S4. After all the crimping parts have been processed, a new main insulated wire core is formed. Then, polyethylene tape is used to wrap multiple layers around the end to complete the repair of the main insulated wire core and form a wrapped fusion body.

[0024] S5. Install heating devices at both ends of the wrapped welded body, cover the outer layer with the prepared cold shrink tube, wrap the surface evenly and smoothly with aluminum foil, and then wrap a layer of heating tape. Turn on the heating device and heat for 1-2 hours at a temperature of 150℃-250℃ until the polyethylene tape melts. Then remove the heating device and allow it to cool naturally. Remove all auxiliary facilities and materials except for the wrapped welded body.

[0025] S6. Spray a semiconductor coating onto the wrapped weld body and wrap it with semiconductor strip to complete the repair of the outer shielding layer;

[0026] S7 uses copper mesh wrapped around both ends of the cable body, connecting two copper braided wires. The copper mesh wrapping has four layers, and the glue injection port is fixed inside. Then, a layer of self-adhesive tape is wrapped, and sealant is applied. After the glue is applied, two layers of PVC tape are wrapped, and then two layers of armor are wrapped. The gap between the armor layer and the cable body is filled with waterproof, fireproof, and flame-retardant high-insulation filler.

[0027] In some embodiments of the present invention, in step S4 above, polyethylene strip is used to wrap around the end of the product to achieve a thickness of 10mm-20mm.

[0028] Compared with the prior art, the embodiments of the present invention have at least the following advantages or beneficial effects:

[0029] This invention provides a 35KV and below cable wrapping fusion splicing intermediate joint and fusion splicing process. It includes a cable body containing a conductor core, a connecting mechanism, an insulation mechanism, and a waterproofing mechanism. The connecting mechanism includes a conductor connecting tube, which is crimped with two conductor core segments to form a crimped portion. The surface of the crimped portion is ground and polished to ensure roundness. A semiconductor filler is used to fill the gap between the conductor core and the conductor connecting tube to achieve a smooth wrapping surface. A semiconductor vulcanized tape is used to wrap the conductor connecting tube and the conductor core in a 1 / 2 overlap manner, completing the surface smoothing of the connection portion and forming an inner shielding layer. The insulation mechanism includes a first wrapping body, which is disposed at the crimped portion to form a wrapping fusion splice. The first wrapping body matches the cable body. After all crimped portions are processed, a new main insulation core is formed. Then, polyethylene tape (the first wrapping body) is used to wrap multiple layers at the closed position to complete the repair of the main insulation core, forming a wrapping fusion splice. Using a first wrapping body of the same nature as the cable body as the main insulation of the cable body solves the problem of various failures caused by water ingress in most conventional conductor core intermediate joints in existing technologies. Heating devices are installed at both ends of the wrapped fusion splice. A pre-prepared cold-shrink tubing is then placed on the outer layer, and aluminum foil is used to evenly and smoothly wrap the surface. A layer of heating tape is then wrapped around it. The heating devices are activated, and heating is carried out for 1-2 hours at a temperature of 150℃-250℃ until the polyethylene tape melts. The heating devices are then removed, and after natural cooling, all auxiliary facilities and materials except for the wrapped fusion splice are removed. A semiconductor coating is applied to the wrapped fusion splice, and semiconductor tape is used for wrapping, completing the repair of the outer shielding layer. The waterproof mechanism includes an armor layer, which is placed within the cable body. Filler adhesive is placed between the cable body and the armor layer, solving the problem of poor external waterproofing and fire resistance of conventional intermediate joints in existing technologies. This invention uses copper mesh to wrap both ends of the cable body, connects two copper braided wires, and the copper mesh wraps in four layers, with the glue injection port fixed inside. Then, a layer of self-adhesive tape is wrapped, and sealant is used for glue injection. After the glue injection is completed, two layers of PVC tape are wrapped, and then two layers of armor layer are wrapped. The gap between the armor layer and the cable body is filled with waterproof, fireproof, and flame-retardant high-insulation filler. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention.

[0032] Icons: 1-Cable body, 2-Copper mesh, 3-Filling adhesive, 4-Crimp joint, 5-Wrapped fusion splice, 6-Armor layer, 7-Sealant. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0035] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0036] In the description of the embodiments of the present invention, it should be noted that any terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. These terms are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0037] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0038] Example

[0039] Please refer to Figure 1 , Figure 1 The following is an embodiment of the present invention.

[0040] This embodiment provides a 35KV and below cable wrapping fusion splice intermediate joint, which includes a cable body 1, a conductor core disposed inside the cable body 1, and also includes a connection mechanism, an insulation mechanism, and a waterproof mechanism.

[0041] The connection mechanism includes a conductor connecting tube, which is crimped with two conductor cores to form a crimping part 4. The present invention uses a conductor connecting tube, which solves the problem that the cable body 1 is not long enough and cannot be increased, thus making it impossible to connect.

[0042] In some embodiments of the present invention, a semiconductor filler is provided between the conductor connecting tube and the conductor core. In this embodiment, a crimp connector is used in the prior art to crimp the two ends of the conductor connecting tube to the two conductor cores respectively. Crimping refers to a termination method, which has the advantage of strong robustness. At this time, there may be a certain gap between the conductor connecting tube and the conductor core. In this embodiment, a semi-conductive cross-linkable tape is used to fill the gap, thereby achieving a smooth wrapping surface.

[0043] In some embodiments of the present invention, the pressing portion 4 is configured as a smooth surface. In actual operation, the surface of the pressing portion 4 needs to be ground and polished to ensure its roundness.

[0044] In some embodiments of the present invention, the crimping portion 4 is provided with a second wrapping body. In this embodiment, the second wrapping body is a semi-conductive vulcanized tape. The semiconductor vulcanized tape is used to wrap the crimping portion 4 with two layers in a 1 / 2 overlap manner, and the connection part is smoothed to form an inner shielding layer.

[0045] The insulation mechanism includes a first wrapping body, which is disposed on the crimping part 4 to form a wrapped fusion body 5. The first wrapping body matches the cable body 1. By using a first wrapping body of the same nature as the cable body 1 as the main insulation of the cable body 1, the problem of various faults caused by water ingress in most conventional conductor core intermediate joints in the prior art is solved. In this embodiment, polyethylene tape is used to wrap multiple layers around the crimping part 4 to complete the repair of the main insulation core of the cable body 1.

[0046] In this embodiment, heating devices are installed at both ends of the wrapped weld body 5, and a prepared cold shrink tube is wrapped on the outer layer. Aluminum foil is used to wrap the surface evenly and smoothly, and then a heating tape is wrapped. The heating device is turned on and heated for 1-2 hours at a temperature of 150℃-250℃ until the polyethylene tape melts. Then the heating device is removed, and after natural cooling, all auxiliary facilities and materials except the wrapped weld body 5 are removed.

[0047] In some embodiments of the present invention, the aforementioned wrapped weld body 5 is provided with a semiconductor coating, which provides excellent static conductivity, serves as a protective energy absorption layer, and also provides good shielding performance. In this embodiment, the semiconductor coating is sprayed onto the wrapped weld body 5 to form a complete conductive layer on the surface of the insulating part, thereby achieving the purpose of absorbing and shielding electromagnetic waves.

[0048] In some embodiments of the present invention, the semiconductor coating is provided with a third wrapping body. In this embodiment, a semiconductor strip is used to wrap around the semiconductor coating to complete the repair of the outer shielding layer.

[0049] The waterproof mechanism includes an armor layer 6, which is disposed on the cable body 1, and a filler 3 is disposed between the cable body 1 and the armor layer 6, which solves the problem of poor external waterproof and fireproof performance of conventional intermediate joints in the prior art.

[0050] In some embodiments of the present invention, the cable body 1 is further provided with a copper mesh 2, and the cable body 1 is connected with copper braided wire to meet the circuit breaking current requirements.

[0051] In some embodiments of the present invention, the copper mesh 2 is provided with a self-adhesive tape layer, a sealant 7 is provided between the self-adhesive tape layer and the copper mesh 2, a PVC tape layer is provided outside the self-adhesive tape layer, an armor layer 6 is provided on the PVC tape layer, and a filler adhesive 3 is provided between the armor layer 6 and the PVC tape layer. In this embodiment, the copper mesh 2 is wrapped around the cable body 1 in four layers with a 1 / 2 overlap, and the glue injection port is fixed inside. Then, a layer of self-adhesive tape is wrapped with a 1 / 2 overlap, and sealant 7 is filled. After the glue injection is completed, two layers of PVC tape are wrapped, and finally, filler adhesive 3 is used for filling. In this embodiment, the filler adhesive 3 is a high-insulation filler adhesive 3 that is water-resistant, fireproof, and flame-retardant.

[0052] This embodiment also provides a welding process for a 35KV and below cable wrapping fusion splice intermediate joint, which includes the above-mentioned 35KV and below cable wrapping fusion splice intermediate joint, and includes the following steps:

[0053] S1, strip the main insulation core of the cable body 1 to expose the conductor core of the cable body 1, strip the outer shielding layer of the conductor core, and connect the stripped conductor core to the two conductor core sections by using a conductor connecting tube. Grind and polish the surface of the crimped part 4 to ensure roundness.

[0054] S2, clean the exposed conductor core and conductor connecting tube to ensure that they meet the technical requirements, and fill the gap between the conductor core and conductor connecting tube with a semiconductor filler to achieve a smooth wrapping surface. In this embodiment, the semiconductor filler is a semi-conductive cross-linkable tape.

[0055] S3, using a 1 / 2 overlap method, the conductor connecting tube and the conductor core are wrapped with two layers of semiconductor vulcanized tape to complete the surface smoothing of the connection part, thereby forming an inner shielding layer. In this embodiment, the semiconductor vulcanized tape is the second wrapping body in embodiment 1.

[0056] S4, after all the crimping parts 4 have been processed, a new main insulated wire core is formed. Then, polyethylene tape is used to wrap multiple layers at the closing position to complete the repair of the main insulated wire core and form a wrapped fusion body 5. The polyethylene tape in this embodiment is the first wrapped body in embodiment 1.

[0057] S5. Install heating devices at both ends of the wrapped weld body 5, cover the outer layer with the prepared cold shrink tube, wrap the surface evenly and smoothly with aluminum foil, and then wrap a layer of heating tape to heat the inside and outside at the same time. Start the heating device and heat for 1-2 hours at a temperature of 150℃-250℃ until the polyethylene tape melts. Then remove the heating device and allow it to cool naturally. Remove all auxiliary facilities and materials except for the wrapped weld body 5.

[0058] S6, a semiconductor coating is sprayed onto the wrapped weld body 5, and a semiconductor strip is used for wrapping to complete the repair of the outer shielding layer. The semiconductor strip in this embodiment is the third wrapping body in embodiment 1.

[0059] S7, copper mesh 2 is wrapped around both ends of the cable body 1, and two copper braided wires are connected. The copper mesh 2 has four layers, and the glue injection port is fixed inside. Then, a layer of self-adhesive tape is wrapped, and sealant 7 is used for glue injection. After the glue injection is completed, two layers of PVC tape are wrapped, and then two layers of armor layer 6 are wrapped. The gap between the armor layer 6 and the cable body 1 is filled with waterproof, fireproof, and flame-retardant high insulation filler 3.

[0060] In some embodiments of the present invention, in step S4 above, polyethylene strip is used to wrap around the end of the product to achieve a thickness of 10mm-20mm.

[0061] This invention employs a novel structural design, utilizing a technology that repairs the insulation body of the intermediate joint used to connect two cable sections, achieving a seamless connection and complete waterproofing. It also utilizes an extended conductor connecting tube connection process, changing the traditional intermediate joint method that requires adding intermediate joints and cables during emergency repairs. This allows for restoration only in the original location, reducing repair costs and improving the safety factor of cable line operation, reducing overall repair costs by 50% each time. Existing traditional fusion-type intermediate joints suffer from uneven welding temperatures due to external heating. This technology uses a non-contact internal conductor heating method, better ensuring the uniformity of the welding of the wrapping material and its moisture-removing function. Water ingress into the cable intermediate joint is mainly caused by water permeation of the external armor layer 6 and inadequate internal filling of the cable, leading to waterproof material failure. This technology solves these problems by filling the armor layer 6 with a waterproof, fireproof, and flame-retardant high-insulation filler adhesive 3.

[0062] In summary, embodiments of the present invention provide an apparatus and a method:

[0063] Embodiments of the present invention provide a 35KV and below cable wrapping fusion splicing intermediate joint and fusion splicing process, which includes a cable body 1, a conductor core disposed inside the cable body 1, and a connection mechanism, an insulation mechanism, and a waterproof mechanism.

[0064] The connection mechanism includes a conductor connecting tube, which is crimped with two conductor cores to form a crimping part 4. The surface of the crimping part 4 is ground and polished to ensure its roundness. Semiconductor filler is used to fill the gap between the conductor core and the conductor connecting tube to achieve a smooth wrapping surface. Semiconductor vulcanized tape is used to wrap the conductor connecting tube and the conductor core in two layers with a 1 / 2 overlap to complete the surface smoothing of the connection part, thereby forming an inner shielding layer. The insulation mechanism includes a first wrapping body, which is set on the crimping part 4 to form a wrapping fusion body 5. The first wrapping body matches the cable body 1. After all crimping parts 4 are processed, a new main insulated core is formed. Then, polyethylene tape (the first wrapping body) is used to wrap multiple layers at the closing position to complete the repair of the main insulated core and form the wrapping fusion body 5. Using a first wrapping body of the same nature as the cable body 1 as the main insulation of the cable body 1 solves the problem of various faults caused by water ingress in most conventional conductor core intermediate joints in the prior art. Heating devices are installed at both ends of the wrapping fusion splice 5. A prepared cold shrink tube is placed on the outer layer, and aluminum foil is used to evenly and smoothly wrap the surface. Then, a heating tape is wrapped around it. The heating device is activated, and heating is carried out for 1-2 hours at a temperature of 150℃-250℃ until the polyethylene tape melts. The heating device is then removed, and after natural cooling, all auxiliary facilities and materials except for the wrapping fusion splice 5 are removed. A semiconductor coating is applied to the wrapping fusion splice 5, and semiconductor tape is used for wrapping, completing the repair of the outer shielding layer. The waterproof mechanism includes an armor layer 6, which is set in the cable body 1. Filler adhesive 3 is placed between the cable body 1 and the armor layer 6, solving the problem of poor external waterproofing and fire resistance of conventional intermediate joints in the prior art. This invention uses a copper mesh 2 to wrap around both ends of the cable body 1, connecting two copper braided wires. The copper mesh 2 has four wrapping layers, and the glue injection port is fixed inside. Then, a layer of self-adhesive tape is wrapped around it, and sealant 7 is used for glue injection. After the glue injection is completed, two layers of PVC tape are wrapped around it, and then two layers of armor layer 6 are wrapped around it. The gap between the armor layer 6 and the cable body 1 is filled with waterproof, fireproof, and flame-retardant high-insulation filler 3.

[0065] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A fusion-welded intermediate joint for 35KV and below cables, comprising a cable body, wherein a conductor core is disposed within the cable body, characterized in that, It also includes connection mechanisms, insulation mechanisms, and waterproofing mechanisms: The connecting mechanism includes a conductor connecting tube, which is crimped with two sections of the conductor core to form a crimping portion; a semiconductor filler is disposed between the conductor connecting tube and the conductor core; and all crimping portions are configured as smooth surfaces. The insulation mechanism includes a first wrapping body, which is disposed on the crimping portion to form a wrapping fusion body, and the first wrapping body matches the cable body; the crimping portion is provided with a second wrapping body; the wrapping fusion body is provided with a semiconductor coating; and the semiconductor coating is provided with a third wrapping body. The waterproof mechanism includes an armor layer disposed on the cable body, and the armor layer is provided with filler adhesive.

2. The 35KV and below cable wrapping fusion splice intermediate joint according to claim 1, characterized in that, The cable body is also provided with a copper mesh, and the cable body is connected with copper braided wire.

3. The 35KV and below cable wrapping fusion splice intermediate joint according to claim 2, characterized in that, The copper mesh is provided with a self-adhesive tape layer, and a sealant is provided between the self-adhesive tape layer and the copper mesh. A PVC tape layer is provided outside the self-adhesive tape layer, and an armor layer is provided on the PVC tape layer. The filler adhesive is provided between the armor layer and the PVC tape layer.

4. A welding process for a 35KV and below cable wrapping fusion splice intermediate joint, characterized in that, The 35KV and below cable wrapping fusion splice intermediate joint as described in any one of claims 1-3 includes the following steps: S1, strip the main insulation core of the cable body to expose the conductor core of the cable body, strip the outer shielding layer of the conductor core, and crimp the stripped conductor core to the conductor core using a conductor connecting tube, and grind and polish the surface of the crimped part. S2, clean the exposed conductor core and conductor connecting tube, and fill the gap between the conductor core and conductor connecting tube with semiconductor filler; S3 uses a semiconductor vulcanized tape to wrap the conductor connecting tube and the conductor core in two layers to complete the surface smoothing of the connection part, thereby forming an inner shielding layer; S4. After all the crimping parts have been processed, a new main insulated wire core is formed. Then, polyethylene tape is used to wrap multiple layers around the end to complete the repair of the main insulated wire core and form a wrapped fusion body. S5. Install heating devices at both ends of the wrapped welded body, cover the outer layer with the prepared cold shrink tube, wrap the surface evenly and smoothly with aluminum foil, and then wrap a layer of heating tape. Turn on the heating device and heat for 1-2 hours at a temperature of 150℃-250℃ until the polyethylene tape melts. Then remove the heating device and allow it to cool naturally. Remove all auxiliary facilities and materials except for the wrapped welded body. S6. Spray a semiconductor coating onto the wrapped weld body and wrap it with semiconductor strip to complete the repair of the outer shielding layer; S7 uses copper mesh wrapped around both ends of the cable body, connecting two copper braided wires. The copper mesh wrapping has four layers, and the glue injection port is fixed inside. Then, a layer of self-adhesive tape is wrapped, and sealant is applied. After the glue is applied, two layers of PVC tape are wrapped, and then two layers of armor are wrapped. The gap between the armor layer and the cable body is filled with waterproof, fireproof, and flame-retardant high-insulation filler.

5. The welding process of the 35KV and below cable wrapping fusion splice intermediate joint according to claim 4, characterized in that, In step S4, polyethylene tape is used to wrap around the seam with layers reaching a thickness of 10mm-20mm.

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