Prefabricated branch cable crimping joint when the cross-section ratio of the main and branch conductors is large

Abstract

The utility model belongs to the technical field of wire and cable processing, in particular to a prefabricated branch cable crimping joint when the cross-section ratio of a trunk conductor to a branch conductor is relatively large; the utility model comprises a main cable, a main cable conductor, a branch cable, a branch cable conductor, a branch cable bending head, a conductor crimping C-type ring and a branch cable bending head binding wire, wherein a main cable conductor is arranged in the main cable, a branch cable conductor is arranged in the branch cable, a branch cable conductor is arranged at the end of the branch cable conductor, the branch cable bending head is folded, branch cable bending head binding wires are arranged at both ends of the folded branch cable bending head, and conductor crimping C-type rings are arranged outside the main cable conductor and the branch cable bending head; when the cross-section ratio of the conductor of the trunk cable to the cross-section of the conductor of the branch cable is relatively large, a standard C-type crimping tube can be used to crimp them tightly together.

Description

Technical Field

[0001] The utility model belongs to the technical field of wire and cable processing, in particular to a prefabricated branch cable crimping joint when the cross-section ratio of a trunk conductor to a branch conductor is relatively large. Background Art

[0002] Prefabricated branch cables are a type of cable commonly used in high-rise building power supply systems. They are characterized by the fact that in the cable manufacturing factory, according to the building power distribution design drawing, the branch cables that need to be powered on each floor are crimped to the main cable according to the floor height, and each crimping joint is sealed by injection molding to form a joint protection jacket, and then transported to the cable installation site for installation as a whole, avoiding the complicated jointing process of cable joints on site. This makes the cable safer and more reliable during laying and operation.

[0003] In the prior art, the prefabricated branch cable is composed of a trunk cable (2) and a branch cable (3), and their conductors are crimped together by a conductor crimping C-shaped ring (4) to achieve electrical connection. Generally, the ratio of the conductor cross-section of the trunk cable to the conductor cross-section of the branch cable is in the range of 2:1 to 3:1. Figure 1 Under normal proportions, the cross-section of the branch cable conductor (3.1) occupies a large space in the C-type crimping ring (4), with a small gap, and the joint is easy to be compressed (e.g. Figure 2 shown).

[0004] However, as the number of floors of high-rise buildings increases, the ratio of the conductor cross-section of the trunk cable (2) to the conductor cross-section of the branch cable (3) has reached 10:1 or even greater.

[0005] The prefabricated branch cables currently sold on the market all use a C-shaped ring (4) to crimp the conductor (2.1) of the trunk cable and the conductor (3.1) of the branch cable together. The C-shaped crimping ring (4) is a standard part and is selected according to the outer diameter of the conductor (2.1) of the trunk cable. When the branch cable conductor (3.1) is small, it occupies little space in the C-shaped ring (4) and cannot be pressed tightly, causing the crimping joint to loosen. In severe cases, the crimping joint may come off, causing a power outage (such as Figure 2 shown).

[0006] In response to the above-mentioned deficiencies in the prior art, the present application proposes a prefabricated branch cable conductor crimping device when the ratio of the main and branch cross-sections is large. The device is suitable for using standard crimping parts to tightly crimp the prefabricated branch cable trunk cable conductor and the small-section conductor together when the ratio of the main conductor cross-section to the branch conductor cross-section is large. Utility Model Content

[0007] The purpose of the utility model is to propose a prefabricated branch cable crimping joint for when the ratio of the cross-section of the main cable conductor to the branch cable conductor is large, so that when the ratio of the cross-section of the main cable conductor to the cross-section of the branch cable conductor is large, a standard C-type crimping tube can be used to tightly crimp them together.

[0008] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0009] The prefabricated branch cable crimping joint when the cross-sectional ratio of the main and branch conductors is large includes a main cable, a main cable conductor, a branch cable, a branch cable conductor, a branch cable bending head, a conductor crimping C-ring and a branch cable bending head binding wire. The main cable is provided with a main cable conductor, the branch cable is provided with a branch cable conductor, the end of the branch cable conductor is a branch cable bending head, the branch cable bending head is folded, branch cable bending head binding wires are provided on both ends of the folded branch cable bending head, and conductor crimping C-rings are provided outside the main cable conductor and the branch cable bending head.

[0010] Preferably, a nylon toothed belt is provided between the main cable conductor and the branch cable conductor below the conductor crimping C-ring.

[0011] Preferably, an injection-molded joint protective jacket is provided at the crimping point between the main cable and the branch cable.

[0012] Preferably, the folding length of the branch cable bending head is 70 mm.

[0013] Compared with the prior art, the utility model has at least one of the following beneficial effects:

[0014] The utility model proposes a prefabricated branch cable crimping joint for when the ratio of the cross-section of the main cable to the conductor cross-section of the branch cable is large, so that when the ratio of the conductor cross-section of the main cable to the conductor cross-section of the branch cable is large, a standard C-type crimping tube can be used to tightly crimp them together, and then each crimping joint is sealed by injection molding to form a joint protection jacket, and the whole is transported to the cable installation site for installation, avoiding the complicated jointing process of the cable joint on site; making the cable safer and more reliable during laying and operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of a compression joint in normal proportion in the prior art;

[0016] Figure 2 This is an enlarged view of the AA section before and after crimping in the prior art;

[0017] Figure 3 It is a schematic diagram of the structure of the crimping joint in the prior art when the ratio is too large;

[0018] Figure 4This is a schematic diagram of the bending of the conductor end of the branch cable of the utility model;

[0019] Figure 5 This is a schematic diagram of the structure of the C-type pipe compression joint of the utility model;

[0020] Figure 6 This is a schematic diagram of the CC cross-sectional structure of the C-type pipe compression joint of the utility model.

[0021] Figure 7 This is a cross-sectional view of the finished crimping joint after injection molding of the utility model.

[0022] In the figure, 1-injection molded connector protective jacket; 2-main cable; 2.1-main cable conductor; 3-branch cable; 3.1-branch cable conductor; 3.2-branch cable bending head; 4-conductor crimping C-ring; 5-branch cable bending head binding wire; 6-nylon toothed belt. DETAILED DESCRIPTION

[0023] like Figure 1-7 In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0024] Example

[0025] The prefabricated branch cable crimping joint when the cross-sectional area ratio of the main and branch conductors is relatively large comprises a main cable 2, a main cable conductor 2.1, a branch cable 3, a branch cable conductor 3.1, a branch cable bending head 3.2, a conductor crimping C-type ring 4 and a branch cable bending head binding wire 5. The main cable 2 is provided with a main cable conductor 2.1, the branch cable 3 is provided with a branch cable conductor 3.1, the end of the branch cable conductor 3.1 is a branch cable bending head 3.2, the branch cable bending head 3.2 is folded, branch cable bending head binding wires 5 are provided at both ends of the folded branch cable bending head 3.2, and conductor crimping C-type rings 4 are provided outside the main cable conductor 2.1 and the branch cable bending head 3.2.

[0026] More specifically, a nylon toothed belt 6 is arranged between the main cable conductor 2.1 and the branch cable conductor 3.1 below the conductor crimping C-ring 4. In order to prevent the branch cable from generating hard friction with its bent part, after the crimping is completed, the metal wire tied to the bending head of the branch conductor is removed, and the main cable conductor and the branch conductor plate are tied together with the nylon toothed belt 6 below the crimping head, and the excess part of the nylon toothed belt is cut off.

[0027] More specifically, an injection-molded joint protective jacket 1 is provided at the crimping point of the main cable 2 and the branch cable 3. The injection-molded joint protective jacket 1 solves the problem of loose joint crimping when the cross-sectional area of ​​the conductors of the prefabricated branch cable trunk cable and the branch cable is relatively large, and avoids the hidden dangers of large contact resistance at the joint, heat damage of the joint, and ultimate damage caused by loose crimping joints. The obtained cable crimping joint is safe and reliable.

[0028] More specifically, the folding length of the branch cable bending head 3.2 is 70 mm, so that the diameter of the branch conductor bending head 3.2 is equivalent to the diameter of the main cable conductor 2.1 and slightly smaller than the inner hole of the C-ring, so that the branch conductor bending head 3.2 can be successfully implanted into the conductor crimping C-ring 4.

[0029] The working principle of the utility model is:

[0030] 1) Strip off the insulation layer and sheath of the branch cable conductor 3.1 to a sufficient length to expose the conductor, fold the conductor in half by about 70 mm, make the diameter of the branch conductor bending head 3.2 equal to the diameter of the main cable conductor 2.1 and slightly smaller than the inner hole of the C-ring, so that the branch conductor bending head 3.2 can be smoothly implanted into the conductor crimping C-ring 4; tie the two ends of the bending head 3.2 with metal wire 5 (such as Figure 3 shown);

[0031] 2) Place the main cable conductor 2.1 and the branch conductor bending head 3.2 into the conductor crimping C-type ring 4. According to the conventional crimping process, the main conductor 2.1 and the branch conductor bending head are crimped together with the conductor crimping C-type ring 4, and the branch conductor bending head binding wire 5 is cut out to finally obtain a tight branch cable crimping head (such as Figure 4 shown);

[0032] 3) In order to prevent the branch cable from generating hard friction with its bent part, after crimping, remove the metal wire tied to the branch conductor bending head, tie the main cable conductor and the branch conductor plate together with a nylon toothed belt 6 under the crimping head, and cut off the excess part of the nylon toothed belt;

[0033] 4) The above crimping method solves the problem of loose joint crimping when the cross-section ratio of the conductor of the prefabricated branch cable main cable and the branch cable is large, and avoids the hidden dangers of large contact resistance at the joint, heating and damage of the joint, and finally occurrence of the joint due to loose crimping joint. The cable crimping joint obtained by providing an injection-molded joint protection jacket 1 at the crimping joint of the main cable 2 and the branch cable 3 is safe and reliable, and the finished cable crimping joint (such as Figure 5 shown).

[0034] Although the utility model is described herein with reference to a plurality of illustrative embodiments of the utility model, it should be understood that those skilled in the art may devise many other modifications and implementations that fall within the scope and spirit of the principles disclosed herein. More specifically, within the scope of the disclosure, drawings, and claims of the present application, various modifications and improvements may be made to the components and / or layout of the subject combination layout. In addition to the modifications and improvements made to the components and / or layout, other uses will also be apparent to those skilled in the art.

Claims

1. Prefabricated branch cable crimping joint, characterized by: The invention comprises a main cable (2), a main cable conductor (2.1), a branch cable (3), a branch cable conductor (3.1), a branch cable bending head (3.2), a conductor crimping C-type ring (4) and a branch cable bending head binding wire (5); the main cable conductor (2.1) is arranged in the main cable (2); the branch cable conductor (3.1) is arranged in the branch cable (3); the end of the branch cable conductor (3.1) is a branch cable bending head (3.2); the branch cable bending head (3.2) is folded; branch cable bending head binding wires (5) are arranged at both ends of the folded branch cable bending head (3.2); and conductor crimping C-type rings (4) are arranged outside the main cable conductor (2.1) and the branch cable bending head (3.2).

2. The prefabricated branch cable crimping joint according to claim 1 is characterized in that: A nylon toothed belt (6) is provided between the main cable conductor (2.1) and the branch cable conductor (3.1) below the conductor crimping C-shaped ring (4).

3. The prefabricated branch cable crimping joint according to claim 1 is characterized in that: An injection-molded joint protection jacket (1) is provided at the crimping point between the main cable (2) and the branch cable (3).

4. The prefabricated branch cable crimping joint according to claim 1 is characterized in that: The folded length of the branch cable bending head (3.2) is 70 mm.

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