Simple bridging component for large-diameter cables

Abstract

The present invention discloses a simple cross-connecting component for large-diameter cables, which solves the problems of low cross-connecting efficiency and poor effect for large-diameter cables in the prior art. The present invention includes a cross-connecting member and a protective sleeve. The protective sleeve cooperates with the cross-connecting member and is wrapped outside the cross-connecting member. The cross-connecting member includes a main trunk clamping ring for clamping the main trunk line and a branch trunk clamping ring for clamping the branch trunk line. The main trunk clamping ring and the branch trunk clamping ring are integrally formed conductive members, and the branch trunk clamping rings are arranged in a T shape. The cross-connecting of the present invention uses a small number and types of materials, has a simple structure and low cost. The cross-connecting component is small in volume, convenient to carry during installation and simple to maintain. There is no need to plan the installation position for the cable cross-connecting device and design other installation process measures, which can meet the intermediate cross-connection of various multi-core or single-core large-diameter cables, and can make the cross-connecting process of various specifications of cables more standardized and normalized.

Description

Technical Field

[0001] The present invention relates to the technical field of cable cross-connection, and particularly to a simple cross-connection component for large-diameter cables. Background Art

[0002] The "T"-shaped cross-connection of cables is mainly applicable to buildings and industrial electrical equipment installation projects for "T"-shaped branch connection when the main cable (trunk line) cannot be cut off. In the past, the "T"-shaped connection of wires usually adopted the method of peeling off the insulating layer of the main trunk line, winding the branch wire around the main trunk line, and wrapping it with insulating cloth. The more direct harm of this wiring method is poor reliability, large contact resistance, and extremely easy to cause electrical accidents; moreover, when the cross-sectional area of the branch wire > 10 mm 2 it is difficult to operate by manual winding. Nowadays, there is a kind of "T"-shaped terminal block that can form a double-layer wiring through the mutual combination of wire clips of different shapes. The lower layer is connected to the main trunk line, and the upper layer is connected to the branch line to form a "T"-shaped connection without cutting off the main line. Similar processes can only cross-connect cables with a diameter ≤ 70 mm 2 At present, there is also a "T"-shaped junction box for the cross-connection process of large-diameter cables. This process consists of three parts: an insulating base, a wiring frame, and a protective box. The wiring frame is composed of various parts such as wire clips, screw pins, nuts, and support frames. The core part of this box is the "T"-shaped connection terminal. The "T" connection terminal realizes the branch connection of the cable through a set of wire clips with a special structure. The wiring clip has a dog-tooth-like inclusive contact with the wire, with a large contact area; the contact pressure is large, and during the entire service life cycle, its contact pressure basically does not change. However, its protective box is relatively large in volume.

[0003] Some cable "T"-shaped cross-connection processes all adopt a direct crimping process, which directly crimps the main line and the branch line (cylinder) together with screws (flat surface). No matter what shape the crimping surface is made into, it cannot ensure a sufficient crimping area. In addition, most cable crimping parts are made of steel materials, and there are significant differences in hardness and resistance from copper wire materials. They are prone to fatigue loosening under long-term high-pressure stress. When the current passing through is relatively large, it is easy to cause the crimping point to overheat or even cause accidents.

[0004] There are also some cable "T"-shaped cross-connection processes. Either the current-carrying capacity is small, or the cross-connection process is complex. The "T"-shaped junction box has a tough appearance, complex components, and a large volume. When cross-connecting, the junction box needs to be installed separately and requires a dedicated installation space. The cross-connection cost is high and the installation workload is large. Summary of the Invention

[0005] In view of the deficiencies in the above background art, the present invention proposes a simple cross-connection component for large-diameter cables, which solves the problems of low cross-connection efficiency and poor effect for large-diameter cables in the prior art.

[0006] The technical solution of the present invention is realized as follows: A simple cross-connection component for a large-diameter cable, including a cross-connection piece and a protective sleeve. The protective sleeve cooperates with the cross-connection piece and is wrapped outside the cross-connection piece; the cross-connection piece includes a main trunk clamp ring for clamping the main trunk line and a branch trunk clamp ring for clamping the branch trunk line. The main trunk clamp ring and the branch trunk clamp ring are integrally formed conductive parts, and the main trunk clamp ring and the branch trunk clamp ring are arranged in a T shape.

[0007] The cross-connection piece is a stamping part made of copper plate, and the protective sleeve is an insulating injection part.

[0008] The main trunk clamp ring includes a locking handle, a wrapping ring and a connecting handle. The wrapping ring is located between the locking handle and the connecting handle. The connecting handle is connected to the branch trunk clamp ring, and the locking handle is connected to the connecting handle through a fastener.

[0009] An oval hole is provided on the locking handle, and a round hole is provided on the connecting handle. The oval hole corresponds to the round hole; the fastener is a locking bolt, and the locking bolt sequentially passes through the oval hole and the round hole and is fixed by a locking nut.

[0010] Reverse anti-slip barbs are provided on the connecting section of the locking bolt and the oval hole; a clamping gap is left between the locking handle and the connecting handle. When the main trunk clamp ring is in a clamped state, the width of the clamping gap is 2 mm to 5 mm.

[0011] The branch trunk clamp ring includes a crimping sleeve for crimping the branch trunk line. The crimping sleeve is integrally formed with the connecting handle and is connected with an arc transition; a ramp opening is provided at one end of the crimping sleeve opposite to the locking nut.

[0012] The protective sleeve is an insulating and flame-retardant PVC part. The protective sleeve includes a main trunk protective sleeve and a branch trunk protective sleeve. The main trunk protective sleeve and the branch trunk protective sleeve are snap-connected, and the main trunk protective sleeve and the branch trunk protective sleeve are arranged in a T shape.

[0013] The branch trunk protective sleeve includes a long semi-sleeve and a short semi-sleeve. One side of the short semi-sleeve is connected to the long semi-sleeve, and the other side is snap-connected to the long semi-sleeve; the main trunk protective sleeve is in contact and snap-connected with the short semi-sleeve.

[0014] A first card stop is provided on the outer side wall of the short semi-sleeve, and a first card hole is provided on the outer side wall of the long semi-sleeve. The first card stop is snap-connected with the first card hole; a snap ring groove is provided at one end of the short semi-sleeve facing the main trunk line, and a second card stop is provided at one end of the long semi-sleeve facing the main trunk line.

[0015] The main trunk protective sleeve includes a left snap-connecting sleeve and a right snap-connecting sleeve that are elastically connected. A snap ring is provided on the inner end face of the left snap-connecting sleeve, and the snap ring is snap-connected with the snap ring groove. A second card hole is provided on the outer end face of the right snap-connecting sleeve, and the second card stop is snap-connected with the second card hole.

[0016] The present invention uses a jumper and a protective kit to quickly and safely jump large-diameter cables; the integrally formed jumper adopts a snap connection form to maximize the termination area, effectively solving the problem of insufficient contact area of the crimping surface at the T-shaped jump point of large-diameter cables. Moreover, the jumper uses the same copper material contact surface, making its resistance value consistent with that of the cable, effectively avoiding the problem of unstable jump caused by existing jump points of different materials. The protective kit adopts a buckle design, forming a cavity inside that matches the jumper, completely wrapping the jumper in a closed cavity, firmly fixing it on the main line, effectively fixing and protecting the jumper, and improving the jump safety factor. The materials used in the jump of the present invention are few in quantity and variety, with a simple structure and low cost; the jump assembly is small in size, convenient to carry during installation, and simple to maintain. There is no need to plan the installation position for the cable jump device and design other installation process measures, meeting the intermediate jump of various multi-core or single-core large-diameter cables, making the jump process of various specifications of cables more standardized and meeting the current technical gap. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention, the drawings required for description in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic structural diagram of the jumper of the present invention.

[0019] Figure 2 It is a schematic structural diagram of the protective kit of the present invention.

[0020] Figure 3 It is a three-dimensional structural diagram of the protective kit of the present invention.

[0021] Figure 4 It is a schematic structural diagram of the main trunk sheath of the present invention.

[0022] Figure 5 It is a schematic structural diagram of the branch trunk sheath of the present invention.

[0023] Figure 6 It is a schematic diagram of the overall usage state of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0025] As Figure 1 , 6 shown in Embodiment 1, a simple cross-connecting component for a large-diameter cable includes a cross-connecting member 1 and a protective sleeve 2. The protective sleeve 2 cooperates with the cross-connecting member 1 and is wrapped outside the cross-connecting member 1. The cross-connecting member 1 is a conductive member, and the protective sleeve is an insulating member; the protective sleeve wrapped outside the cross-connecting member 1 plays an insulating and protective role. The cross-connecting member 1 includes a main trunk collar 11 for clamping the main trunk line 100 and a branch trunk collar 12 for clamping the branch trunk line 200. The main trunk collar 11 and the branch trunk collar 12 are integrally formed conductive members, which can maximize the end-connection area and effectively solve the problem of insufficient contact area of the crimping surface at the "T"-shaped cross-connection point of large-diameter cables. The main trunk collar 11 and the branch trunk collar 12 are arranged in a "T" shape, and the main wire passing hole 110 of the main trunk collar 11 and the branch wire passing hole 120 of the branch trunk collar 12 are vertically arranged. There is no need to plan the installation position for the cable cross-connecting device and design other installation process measures, which can make the cross-connecting process of various specifications of cables more standardized and normalized. Preferably, the cross-connecting member 1 is a stamping part made of copper sheet, and the protective sleeve 2 is an injection-molded insulating part. That is, the contact surface from the main trunk cable to the branch cable uses copper material, so that its resistance value is the same as that of the cable, which can meet the intermediate cross-connection of various multi-core or single-core large-diameter cables and make up for the current technical gap.

[0026] Furthermore, the main trunk collar 11 is a copper sheet part, including an integrally formed locking handle 11-1, a wrapping ring 11-2 and a connecting handle 11-3. The wrapping ring 11-2 is located between the locking handle 11-1 and the connecting handle 11-3, forming an open-pin shape. The wrapping ring is the main wrapping part of the main trunk line, and the diameter of the wrapping ring can be made according to the diameter of the cross-connected main trunk cable. The connecting handle 11-3 is connected to the branch trunk collar 12, and the locking handle 11-1 is connected to the connecting handle 11-3 through a fastener 11-4 for locking and fixing the main trunk line located inside the wrapping ring. The thickness of the copper sheet, the width of the main trunk wrapping collar and the diameter of the branch trunk crimping sleeve all depend on the wire diameters of the main trunk cable and the cross-connected branch trunk cable, and are set according to needs.

[0027] Preferably, an oval hole is provided on the locking handle 11-1 to facilitate the quick installation of fasteners. A round hole is provided on the connecting handle 11-3, and the oval hole corresponds to the round hole. The fastener 11-4 is a locking bolt, and the locking bolt sequentially passes through the oval hole and the round hole and is fixed by a locking nut 11-5. A washer is provided between the locking nut and the connecting handle. Reverse anti-slip barbs are provided on the connecting section of the locking bolt and the oval hole, that is, the locking bolt is an anti-slip bolt. The anti-slip barbs are provided to prevent the large diameter of the main line from pulling and deforming the wrapping ring, so that the wrapping ring is in the best locking state. A clamping gap 11-7 is left between the locking handle 11-1 and the connecting handle 11-3. When the main trunk clamp 11 is in the clamping state, the width of the clamping gap 11-7 is 2 mm to 5 mm, preferably 3 mm, to prevent over-tight locking of the package and the phenomenon of insufficient clamping of the main line, and further ensure the firm clamping of the main line. The cable jumper can be made into a jumper assembly according to the load capacity, and the appearance volume of the assembly is minimized for easy installation; the installation workload and complex process of the cable jumper are reduced.

[0028] Furthermore, the branch trunk clamp 12 includes a crimping sleeve 12-1 for crimping the branch line. During use, the branch line is pressed tightly in the crimping sleeve by the crimping sleeve, that is, the crimping sleeve extends towards the side of the main trunk clamp to form a tubular wire nose. During use, the branch line can be inserted into the wire nose and crimped with a hydraulic crimper to form a hexagonal prism shape to ensure the crimping strength. The crimping sleeve 12-1 is integrally formed with the connecting handle 11-3 and is connected with an arc transition to improve the overall strength. A ramp opening 12-2 is provided at one end of the crimping sleeve 12-1 opposite to the locking nut 11-5 to facilitate the installation of the locking nut and prevent interference. The overall jumper uses less material quantity and fewer material types, has a simple structure, and low cost; and the jumper has a small volume, is convenient to carry during installation, and is easy to maintain.

[0029] As Figure 2 、 3 shown in Embodiment 2, a simple jumper assembly for a large-diameter cable, the protective sleeve 2 is made of insulating and flame-retardant PVC, has a certain elasticity, and is convenient for installation. The protective sleeve 2 includes a main trunk sheath 21 and a branch trunk sheath 22. The main trunk sheath 21 and the branch trunk sheath 22 are snap-connected, and the main trunk sheath 21 and the branch trunk sheath 22 are arranged in a T shape and match the jumper. The main trunk sheath 21 and the branch trunk sheath 22 form a T-shaped cavity, and the jumper is sealed in the T-shaped cavity to provide sealing protection for the jumper.

[0030] Furthermore, as Figure 5As shown, the branch sheath 22 includes a long semi-sheath 22-1 and a short semi-sheath 22-2. The long semi-sheath 22-1 and the short semi-sheath 22-2 are designed to be buckled together, forming a cavity 220 inside that matches the branch clamping ring of the jumper for quick installation. One side of the short semi-sheath 22-2 is connected to the long semi-sheath 22-1, and the other side is clamped to the long semi-sheath 22-1. The branch sheath has a certain elasticity. The short semi-sheath 22-2 and the long semi-sheath 22-1 are integrally formed and there is a crease between them for easy opening and closing during installation. The main sheath 21 is in contact with and clamped to the short semi-sheath 22-2 to ensure installation tightness and accuracy, achieving quick and precise installation.

[0031] Preferably, a first clamping stop 22-3 is provided on the outer sidewall of the short semi-sheath 22-2, and a first clamping hole 22-4 is provided on the outer sidewall of the long semi-sheath 22-1. The first clamping stop 22-3 is clamped to the first clamping hole 22-4. A clamping ring groove 22-5 is provided at one end of the short semi-sheath 22-2 facing the main line, and a second clamping stop 22-6 is provided at one end of the long semi-sheath 22-1 facing the main line. The other end of the short semi-sheath is flush with the corresponding end of the long semi-sheath. As Figure 4 shown, the main sheath 21 includes a left clamping sleeve 21-1 and a right clamping sleeve 21-2 that are elastically connected, that is, the left clamping sleeve 21-1 and the right clamping sleeve 21-2 are designed to be buckled together, forming a cavity 221 inside that matches the main clamping ring of the jumper. A clamping ring 21-3 is provided on the inner end face of the left clamping sleeve 21-1. The clamping ring 21-3 is clamped to the clamping ring groove 22-5 for quick positioning and preliminary clamping of the main sheath. A second clamping hole 21-4 is provided on the outer end face of the right clamping sleeve 21-2. The second clamping stop 22-6 is clamped to the second clamping hole 21-4 for quick clamping of the main sheath.

[0032] Other structures are the same as those in Embodiment 1.

[0033] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A simple cross-connecting component for large-diameter cables, characterized in that: It includes a jumper (1) and a protective sleeve (2). The protective sleeve (2) cooperates with the jumper (1) and wraps around the outside of the jumper (1). The jumper (1) includes a main trunk clamping ring (11) for clamping the main trunk line and a branch trunk clamping ring (12) for clamping the branch trunk line. The main trunk clamping ring (11) and the branch trunk clamping ring (12) are integrally formed conductive parts, and the main trunk clamping ring (11) and the branch trunk clamping ring (12) are arranged in a T shape. The main trunk clamping ring (11) includes a locking handle (11-1), a wrapping ring (11-2) and a connecting handle (11-3). The wrapping ring (11-2) is located between the locking handle (11-1) and the connecting handle (11-3). The connecting handle (11-3) is connected to the branch trunk clamping ring (12), and the locking handle (11-1) is connected to the connecting handle (11-3) through a fastener (11-4). The protective sleeve (2) is an insulating and flame-retardant PVC part. The protective sleeve (2) includes a main trunk sheath (21) and a branch trunk sheath (22). The main trunk sheath (21) and the branch trunk sheath (22) are snap-connected, and the main trunk sheath (21) and the branch trunk sheath (22) are arranged in a T shape. The main trunk sheath (21) and the branch trunk sheath (22) form a T-shaped cavity, and the jumper is sealed in the T-shaped cavity to provide sealing protection for the jumper. The branch trunk sheath (22) includes a long half sleeve (22-1) and a short half sleeve (22-2). One side of the short half sleeve (22-2) is connected to the long half sleeve (22-1), and the other side is clamped to the long half sleeve (22-1). The main trunk sheath (21) is in contact and clamped with the short half sleeve (22-2).

2. The simple cross-connecting component for large-diameter cables according to claim 1, characterized in that: The jumper (1) is a stamping part made of copper sheet, and the protective sleeve (2) is an insulating injection part.

3. The simple cross-connection component of the large-diameter cable according to claim 1, characterized in that: An oval hole is provided on the locking handle (11-1), and a round hole is provided on the connecting handle (11-3). The oval hole corresponds to the round hole. The fastener (11-4) is a locking bolt, and the locking bolt passes through the oval hole and the round hole in sequence and is fixed by a locking nut (11-5).

4. The simple cross-connecting component for large-diameter cables according to claim 3, characterized in that: Reverse anti-slip barbs are provided on the connecting section of the locking bolt and the oval hole. A clamping gap (11-7) is left between the locking handle (11-1) and the connecting handle (11-3). When the main trunk clamping ring (11) is in a clamped state, the width of the clamping gap (11-7) is 2 mm to 5 mm.

5. The simple cross-connecting component for large-diameter cables according to claim 4, characterized in that: The branch trunk clamping ring (12) includes a crimping sleeve (12-1) for crimping the branch trunk line. The crimping sleeve (12-1) is integrally formed with the connecting handle (11-3) and is connected with an arc transition. A ramp opening (12-2) is provided at one end of the crimping sleeve (12-1) opposite to the locking nut (11-5).

6. The simple cross-connecting component for large-diameter cables according to claim 1, characterized in that: A first clamping block (22-3) is provided on the outer side wall of the short half sleeve (22-2), and a first clamping hole (22-4) is provided on the outer side wall of the long half sleeve (22-1). The first clamping block (22-3) is clamped with the first clamping hole (22-4). A clamping ring groove (22-5) is provided at one end of the short half sleeve (22-2) facing the main trunk line, and a second clamping block (22-6) is provided at one end of the long half sleeve (22-1) facing the main trunk line.

7. The simple cross-connecting component for large-diameter cables according to claim 6, characterized in that: The main trunk sheath (21) includes a left clamping sleeve (21-1) and a right clamping sleeve (21-2) which are elastically connected. A clamping ring (21-3) is provided on the inner end face of the left clamping sleeve (21-1), and the clamping ring (21-3) is clamped with a clamping ring groove (22-5). A second clamping hole (21-4) is provided on the outer end face of the right clamping sleeve (21-2), and a second clamping stop (22-6) is clamped with the second clamping hole (21-4).

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