Waterproof pre-branched cable

Abstract

The utility model discloses a waterproof pre-branched cable, which comprises a main cable and a branch cable, the connecting part of the branch cable and the main cable is a conductor connecting part, a branch connecting body is arranged outside the conductor connecting part, the branch connecting body comprises a C-shaped clamp, and the C-shaped clamp is pressed outside the conductor connecting part for fixation; the cable further comprises an injection molding connecting part which is arranged outside the conductor connecting part for injection molding and wrapping. The cable further comprises a waterproof layer. The pre-cable is reasonable in structural design, and has the following beneficial effects that the pre-cable is good in continuity, and fault points and contact resistance are reduced; meanwhile, the branch connector adopts a multi-layer wrapping structure, the cable is further provided with a waterproof layer, the waterproof effect can be effectively achieved, after injection molding is conducted, the sealing effect is remarkable, water can be effectively prevented from permeating into the cable connecting position, and the problems of short circuit and the like are avoided.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, and in particular to a waterproof pre-branched cable. Background Technology

[0002] With urban development, high-rise buildings, large factories, and cultural and sports venues are constantly emerging, placing higher demands on power distribution systems. Traditional cable distribution methods are gradually revealing limitations in dealing with complex building structures and diverse power distribution needs. For example, in floor-level power distribution design, radial distribution requires a large number of cables, cable trays, and large cable shafts, resulting in high costs; the more floors connected in a connection method, the lower the safety factor; and branching trunk cables are cumbersome to construct. Therefore, the market urgently needs a more efficient, economical, and safer distribution cable, leading to the development of branch cables.

[0003] Branched cables evolved from ordinary plastic-insulated power cables. Domestic architectural design departments, drawing on international experience, proposed new ideas, leaving ample room for the development of branched cables. Pre-branched cables are processed directly in cable factories using advanced, fully mechanized crimping processes, avoiding the influence of human factors and maintaining the cable's complete electrical performance. The development and application of these technologies have driven the emergence and development of pre-branched cables.

[0004] However, traditional branched cables have the following drawbacks: simple junction box sealing structure with small contact area; lack of waterproof barrier; and mechanical fixing methods are susceptible to loosening due to vibration. In particular, the branch nodes in existing pre-branched cables often have insufficient sealing performance, making them prone to insulation degradation or even short circuits due to moisture intrusion, especially in high humidity or open-air environments. Utility Model Content

[0005] The purpose of this invention is to provide a waterproof pre-branched cable, which effectively solves the waterproof problem of traditional pre-branched cables and improves the safety and reliability of the cable.

[0006] To achieve the above objectives, the present invention provides a waterproof pre-branched cable, comprising a main cable and branch cables, wherein the branch cables are connected to the main cable, and the connection point between the branch cables and the main cable is a conductor connection portion. A branch connector is provided outside the conductor connection portion, and the branch connector includes a C-clamp, which is crimped onto the outside of the conductor connection portion for fixation. The cable also includes an injection-molded connector, which is disposed outside the conductor connection portion and injection-molded to fix the relative positions of the main cable, branch cables, and branch connector. The cable also includes a waterproof layer.

[0007] The main cable can be a single-core or multi-core cable, responsible for transmitting the main electrical energy. It consists of conductors, insulation, and sheath. The insulation uses irradiated cross-linked polyolefin insulation material, a new type of environmentally friendly material with characteristics such as high temperature resistance, halogen-free, low smoke, and flame retardancy. It has good heat resistance and radiation resistance, and a longer service life. The sheath material uses low-smoke halogen-free polyolefin material, which has good flame retardant properties, heat resistance, mechanical properties, and halogen-free low-smoke characteristics, while also having excellent crack resistance.

[0008] Branch cables can be single-core or multi-core cables, branching off from the main cable to connect to different electrical equipment. They consist of conductors, insulation, and sheaths. The insulation uses irradiated cross-linked polyolefin insulation material, a new type of environmentally friendly material with characteristics such as high temperature resistance, halogen-free, low smoke, and flame retardancy. It also has good heat resistance and radiation resistance, resulting in a longer service life. The sheath material uses low-smoke halogen-free polyolefin material, which has good flame retardant properties, heat resistance, mechanical properties, and halogen-free low-smoke characteristics, while also exhibiting excellent crack resistance.

[0009] Furthermore, the main cable includes a main cable conductor and a main cable insulation layer, and the branch cables include branch cable conductors and branch cable insulation layers.

[0010] Furthermore, the main cable conductor and the branch cable conductor are Class 2 annealed and compacted copper conductors, which are formed by twisting and compacting multiple strands of copper wire; the insulation layer of the main cable and the insulation layer of the branch cable are formed by wrapping with insulating tape.

[0011] The main and branch cable conductors are made of Class 2 annealed compacted copper conductors, which are formed by twisting and compacting multiple strands of copper wire. Compacted copper conductors have excellent conductivity, mechanical strength, and production efficiency, which not only improves the efficiency and safety of power transmission but also reduces long-term operating costs. After the pre-branched cables are manufactured, the exposed copper conductors of the main and branch cables are wrapped with insulating tape to isolate the power supply, prevent leakage accidents, and provide good insulation withstand voltage characteristics, ensuring good insulation performance at the conductor connections.

[0012] Furthermore, the conductor connection part is the connection part where the insulation layers of the main cable and the branch cable are stripped away, leaving the remaining main cable conductor and the branch cable conductor connected.

[0013] Furthermore, the branch cable is connected to the main cable by overlapping the conductors of the main cable and the branch cable, and then crimping them to the conductor connection part with a C-clamp, so that the conductors of the main cable and the branch cable are fixedly connected.

[0014] Furthermore, the branch connector also includes a layer of raw rubber tape, a layer of high-pressure rubber self-adhesive tape, a layer of insulating tape, and a layer of electrical PVC tape.

[0015] The branch connection is made by crimping the conductors of the main cable and the branch cable with a C-type clamp. After crimping, insulation material is used for insulation treatment. The connection is wrapped with a layer of raw rubber tape, a layer of high-voltage self-adhesive rubber tape, a layer of insulating tape, and a layer of electrical PVC tape in sequence to ensure good insulation performance of the branch connection.

[0016] Furthermore, after the C-clamp is crimped, a layer of raw rubber tape is wrapped around it, a layer of high-voltage rubber self-adhesive tape is wrapped around the raw rubber tape, a layer of insulating tape is wrapped around the high-voltage rubber self-adhesive tape, and a layer of electrical PVC tape is wrapped around the insulating tape.

[0017] After the C-clamp is crimped, a layer of raw rubber tape is wrapped around it. Raw rubber tape has good flexibility and adhesion, which can fill the gaps in the connection area, forming a tight seal to prevent moisture, dust, and other impurities from entering the cable connection. This avoids faults such as decreased cable insulation performance and short circuits caused by the intrusion of these impurities, ensuring the normal operation of the cable. It also has a certain insulation property, enhancing the insulation effect at the branch cable connection. A layer of high-voltage self-adhesive rubber tape is then wrapped around the raw rubber tape. This high-voltage self-adhesive rubber tape is crucial for ensuring the safe, reliable, and efficient operation of the cable system. It not only provides necessary insulation and waterproof protection but also enhances the cable's high-voltage resistance, corrosion resistance, and shielding performance. A layer of insulating tape is then wrapped around the high-voltage self-adhesive rubber tape, acting as a buffer and padding to protect the insulation from damage when the cable is subjected to external forces. Due to its inherent material properties, insulating tape can provide corrosion and aging protection for the insulation or inner sheath of cable connections, extending the cable's service life. It can also isolate the power source, preventing leakage accidents, and possesses excellent insulation and withstand voltage characteristics, ensuring good insulation performance at branch connections. Wrapping an additional layer of electrical PVC tape over the insulating tape provides extra insulation protection, enhancing insulation performance. This PVC tape wrapping also prevents current leakage, ensuring the safe and efficient transmission of the cable.

[0018] Furthermore, the waterproof layer is disposed on the outer layer of the main cable insulation layer and the branch cable insulation layer, located inside the injection-molded connection part and outside the conductor connection part.

[0019] Furthermore, the waterproof layer is provided in three sections. The first and second sections of the waterproof layer are respectively provided at the beginning and end of the main cable in the injection molding connection part, and the third section of the waterproof layer is provided at the end of the branch cable in the injection molding connection part.

[0020] Furthermore, the C-clamp is a copper-sleeved C-clamp; the injection-molded connector is a low-smoke halogen-free polyolefin plastic conductor connector; and the waterproof layer is a water-blocking tape.

[0021] The waterproof layer is wrapped with water-blocking tape, which prevents water molecules from entering the cable through gaps, thus ensuring the cable's electrical performance and service life. The use of water-blocking tape prevents the cable from being corroded by moisture underwater or in humid environments, thereby improving the cable's water resistance and corrosion resistance.

[0022] The C-clamp uses a copper sleeve C-clamp to connect the main cable conductor and the branch cable conductor, realizing the connection between the main line and the branch line. The crimping is tight and the connection joint is integrated, which makes the current conduction distribution uniform and the resistance low. This gives the line stable and good contact performance and can effectively ensure the efficiency and stability of power transmission.

[0023] The injection-molded connection part is made of low-smoke halogen-free polyolefin plastic, which ensures a reliable connection between the main cable and the branch cable, and also provides the necessary insulation and protection functions, thereby ensuring the safety and stability of the entire cable system.

[0024] In summary, the device structure of this utility model is reasonably designed. Applying the technical solution of this utility model has the following beneficial effects: The pre-cable of this utility model consists of three parts: a main cable, branch cables, and a branch connector. A branch connector is provided between the main cable and the branch cables, eliminating the need for branch joints during on-site installation, ensuring good continuity, and reducing fault points and contact resistance. Simultaneously, its protective grounding wire has good continuity, with no intermediate joints, providing absolutely reliable grounding protection. Furthermore, the branch connector in this utility model adopts a multi-layer wrapping structure and adds a waterproof layer, effectively preventing water penetration and avoiding short circuits. After plastic injection, the sealing effect is significant, effectively preventing moisture from penetrating to the cable connection and avoiding problems such as short circuits. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the waterproof pre-branched cable of this utility model;

[0026] Explanation of reference numerals in the attached drawings: 1-Main trunk cable, 101-Main trunk cable conductor, 102-Main trunk cable insulation layer; 2-Branch cable, 201-Branch cable conductor, 202-Branch cable insulation layer; 3-Branch connector, 301-C-clamp, 302-Raw rubber tape, 303-High-voltage self-adhesive rubber tape, 304-Insulating tape, 305-Electrical PVC tape; 4-Injection molded connection part; 5-Waterproof layer. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model, but this does not constitute a limitation on the scope of protection of the present utility model.

[0028] In this utility model, for clearer description, the following explanation is provided: The observer faces the attached... Figure 1 When observing, the observer's left front side is designated as "front," the observer's right rear side as "rear," the observer's left rear side as "left," the observer's right front side as "right," the observer's top as "up," and the observer's bottom as "down." It should be noted that the terms "front end," "rear end," "left side," "right side," "middle," "above," and "below" in this text indicate orientations or positional relationships based on the accompanying drawings. These are merely for the purpose of clearly describing the present invention and do not indicate or imply that the structure or component referred to must have a specific orientation or be constructed in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," "third," and "fourth" are used only for the purpose of clarity or simplification of description and should not be construed as indicating or implying relative importance or quantity.

[0029] This utility model of waterproof pre-branched cable has excellent technical and economic indicators, especially in terms of engineering economy, technological advancement, and ease of installation. Compared with traditional cables and busbars (busbar ducts), it has outstanding advantages, such as:

[0030] 1. Pre-branched cables have excellent impact resistance, airtightness, water resistance and fire resistance;

[0031] 2. The main cable conductor has no joints, ensuring good continuity and reducing the probability of failure;

[0032] 3. High customizability; branch locations can be set according to the needs of the power distribution system's distribution points;

[0033] These advantages enable the waterproof pre-branched cable of this invention to be widely used and recognized in the field of building power distribution.

[0034] See Figure 1 This utility model provides a waterproof pre-branched cable, including a main cable 1 and branch cables 2. The branch cables 2 are connected to the main cable 1. The connection part between the branch cables 2 and the main cable 1 is a conductor connection part. A branch connector 3 is provided outside the conductor connection part. The branch connector 3 includes a C-clamp 301, which is crimped to the outside of the conductor connection part for fixation. The cable also includes an injection-molded connector 4, which is provided outside the conductor connection part for injection molding and fixes the relative positions of the main cable 1, branch cables 2 and branch connector 3. The cable also includes a waterproof layer 5.

[0035] Specifically, the main cable 1 includes a main cable conductor 101 and a main cable insulation layer 102, and the branch cable 2 includes a branch cable conductor 201 and a branch cable insulation layer 202.

[0036] Specifically, the main cable conductor 101 and the branch cable conductor 201 are Class 2 annealed and compacted copper conductors, which are made of multiple strands of copper wire twisted and compacted; the main cable insulation layer 102 and the branch cable insulation layer 202 are wrapped with insulating tape 304.

[0037] Specifically, the conductor connection part is the connection point where the insulation layers 102 and 202 of the main cable and branch cable 1 and branch cable 2 are stripped, leaving the main cable conductor 101 and branch cable conductor 201 connected. Specifically, the branch cable 2 is connected to the main cable 1 by overlapping the main cable conductor 101 and branch cable conductor 201, and then a C-clamp 301 is used to press it onto the conductor connection part, thus fixing the main cable conductor 101 and branch cable conductor 201 together.

[0038] In a preferred embodiment of this utility model, the branch connector 3 further includes a layer of raw rubber tape 302, a layer of high-voltage self-adhesive rubber tape 303, a layer of insulating tape 304, and a layer of electrical PVC tape 305. Specifically, after the C-clamp 301 is crimped, a layer of raw rubber tape 302 is wrapped around it, then a layer of high-voltage self-adhesive rubber tape 303 is wrapped around the raw rubber tape 302, then a layer of insulating tape 304 is wrapped around the high-voltage self-adhesive rubber tape 303, and finally a layer of electrical PVC tape 305 is wrapped around the insulating tape 304.

[0039] In a preferred embodiment of this utility model, the waterproof layer 5 is disposed on the outer layer of the main cable insulation layer 102 and the branch cable insulation layer 202, located inside the injection-molded connection part 4 and outside the conductor connection part. Specifically, the waterproof layer 5 is provided in three sections. The first and second sections of the waterproof layer 5 are respectively disposed at the beginning and end of the main cable 1 in the injection-molded connection part 4, and the third section of the waterproof layer 5 is disposed at the end of the branch cable 2 in the injection-molded connection part 4.

[0040] Specifically, the C-clamp 301 is a copper sleeve C-clamp 301; the injection-molded connector 4 is a low-smoke halogen-free polyolefin plastic conductor connector; and the waterproof layer 5 is a water-blocking strip.

[0041] This utility model relates to a waterproof pre-branched cable, available in single-core and multi-core stranded types. Each single-core pre-branched cable can be further divided into three parts: a main cable 1, branch cables, and a branch connector 3. The main cable conductor 101 is seamless, ensuring good continuity and reducing fault points and contact resistance. The branch connector 3 employs multi-layer wrapping, enhanced by adding C-clamps 301 for crimping, and sequentially wrapping with a layer of raw rubber tape 302, a layer of high-voltage self-adhesive rubber tape 303, insulating tape 304, and a layer of electrical PVC tape 305. This strengthens the basic insulation performance, prevents current leakage, and is suitable for harsh environments such as high temperature and humidity. The addition of waterproof wrapping also effectively provides waterproofing.

[0042] The waterproof pre-branched cable provided by this utility model effectively solves the waterproofing problem of traditional pre-branched cables through its unique structural design, improving the cable's safety and reliability. Whether in environments with high construction difficulty or in application scenarios with high cable safety requirements, this waterproof pre-branched cable demonstrates excellent performance and has good market prospects and application value. Its main features are as follows:

[0043] 1. Structural Design

[0044] The pre-branched cable consists of three parts: the main cable 1, the branch cables, and the branch connector 3. The main cable 1 and the branch cables 2 are connected by a specially designed branch connector 3. This eliminates the need for branch joints during on-site installation, ensuring good continuity and reducing fault points and contact resistance. The protective grounding wire of the prefabricated pre-branched cable has excellent continuity and no intermediate joints, providing absolutely reliable grounding protection.

[0045] 2. Ease of installation

[0046] Pre-branched cables are easy to install, have a short construction period, and significantly reduce installation time. They can be combined arbitrarily and placed directly in cable trenches, special cable wells in buildings, or different cable bridges. They have low requirements for the operating environment, low installation precision, free cable routing, and small bending radius, which greatly reduces the amount of construction work.

[0047] 3. Easy to install and maintain

[0048] Pre-branched cables are easier to install and save time. Compared to on-site splicing, they reduce the risk of human error and offer more consistent quality. Fewer connection points reduce the risk of poor contact or short circuits due to improper installation. Prefabricated standardized joints offer high reliability, resulting in less maintenance work and lower maintenance costs.

[0049] 4. Good economic efficiency

[0050] Pre-branched cables are faster to install, save labor, and are more economical in the long run. They also offer design flexibility, allowing for customization of branch locations and lengths to meet different wiring needs and reduce waste.

[0051] 5. Good waterproof performance

[0052] The branch connector 3 in this utility model adopts a multi-layer wrapping structure and adds a waterproof layer 5, which can effectively block water. After being injected with plastic, the sealing effect is significant, which can effectively prevent moisture from penetrating to the cable connection and avoid short circuits and other problems.

[0053] 6. Environmental resistance

[0054] Pre-branched cables have good impact resistance, airtightness, water resistance and fire resistance. They can not only work normally in humid environments, but also be placed in the open and buried in the soil.

[0055] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A waterproof pre-branched cable, comprising a main cable and branch cables, wherein the branch cables are connected to the main cable, characterized in that: The connection between the branch cable and the main cable is a conductor connection part. A branch connector is provided outside the conductor connection part. The branch connector includes a C-clamp, which is crimped onto the outside of the conductor connection part for fixation. The cable also includes an injection-molded connector, which is provided outside the conductor connection part for injection molding and fixes the relative positions of the main cable, branch cable, and branch connector. The cable also includes a waterproof layer.

2. The waterproof pre-branched cable according to claim 1, characterized in that: The main cable includes a main cable conductor and a main cable insulation layer, and the branch cables include branch cable conductors and branch cable insulation layers.

3. The waterproof pre-branched cable according to claim 2, characterized in that: The main cable conductor and branch cable conductor are Class 2 annealed and compacted copper conductors, which are formed by twisting and compacting multiple strands of copper wire; the insulation layer of the main cable and branch cable is formed by wrapping with insulating tape.

4. A waterproof pre-branched cable according to claim 2 or 3, characterized in that: The conductor connection part is the connection point where the insulation layers of the main cable and the branch cable are stripped, leaving the conductors of the main cable and the branch cable connected.

5. A waterproof pre-branched cable according to claim 4, characterized in that: The branch cable is connected to the main cable by overlapping the conductors of the main cable and the branch cable, and then using a C-clamp to press it onto the conductor connection part, so that the conductors of the main cable and the branch cable are fixedly connected.

6. A waterproof pre-branched cable according to claim 1, 3, or 5, characterized in that: The branch connector also includes a layer of raw rubber tape, a layer of high-pressure rubber self-adhesive tape, a layer of insulating tape, and a layer of electrical PVC tape.

7. A waterproof pre-branched cable according to claim 6, characterized in that: After the C-clamp is crimped, a layer of raw rubber tape is wrapped around it, then a layer of high-voltage rubber self-adhesive tape is wrapped around the raw rubber tape, then a layer of insulating tape is wrapped around the high-voltage rubber self-adhesive tape, and finally a layer of electrical PVC tape is wrapped around the insulating tape.

8. A waterproof pre-branched cable according to claim 1, 3, 5, or 7, characterized in that: The waterproof layer is located on the outer layer of the main cable insulation layer and the branch cable insulation layer, inside the injection molding connection part and outside the conductor connection part.

9. A waterproof pre-branched cable according to claim 8, characterized in that: The waterproof layer is provided in three sections. The first and second sections are respectively provided at the beginning and end of the main cable in the injection molding connection part, and the third section is provided at the end of the branch cable in the injection molding connection part.

10. A waterproof pre-branched cable according to claim 9, characterized in that: The C-clamp is a copper-sleeved C-clamp; the injection-molded connector is a low-smoke halogen-free polyolefin plastic conductor connector; and the waterproof layer is a water-blocking tape.

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