Bolt type cable connecting device

Abstract

The utility model discloses a bolt type cable connecting device which comprises a split type protective sleeve, a retainer, a connecting piece, a sealing ring piece, a locking piece and a sealing sleeve, the retainer is arranged in the split type protective sleeve, the connecting piece is arranged on the retainer, the sealing ring piece is sleeved on the retainer, and the locking piece is arranged on the sealing ring piece. The sealing sleeve and the locking piece are arranged at the two ends of the split type protective sleeve, and the locking piece is in threaded connection with the split type protective sleeve. According to the utility model, through the structural combination design of the split type protective sleeve, the retainer and the connecting piece, the stable connection of cable cores can be realized, and the connector has high protection grade and sealing performance, is simple to install and maintain, and is suitable for the connection of multi-core cables.

Description

Technical Field

[0001] This utility model belongs to the field of electrical connection technology, specifically relating to a bolt-type cable connection device. Background Technology

[0002] In the fields of power systems and electrical engineering, the safety and reliability of cable connections are core elements for ensuring the stable operation of equipment. Traditional cable connection methods mostly employ welding, crimping, or ordinary bolt fastening structures. These methods have gradually revealed the following technical defects over long-term use:

[0003] 1. Insufficient connection stability: Conventional connection structures are susceptible to mechanical vibration, temperature changes and other factors, which can lead to increased contact resistance, loose connection points, and even local overheating or arcing failures.

[0004] 2. Limitations in protection performance: Existing connection devices mostly rely on a single seal or a simple housing design, which makes it difficult to meet the high-level protection requirements of IP65 and above under complex environments (such as humidity, dust, and corrosive gases), and there are hidden dangers such as insulation aging, water leakage and short circuit.

[0005] 3. Poor compatibility and scalability: Most connectors are designed for a single material (such as pure copper or pure aluminum cables). When dissimilar metals such as copper and aluminum come into direct contact, electrochemical corrosion is likely to occur. Furthermore, the fixed structure makes it difficult to adapt to the flexible installation requirements of cables with different core counts (such as 3-5 cores).

[0006] 4. Complex installation and maintenance: Traditional split sleeves and connecting pipes lack integrated fixing design. During assembly, they need to be adjusted multiple times using special equipment, resulting in low operating efficiency and problems such as poor sealing or uneven tightening.

[0007] In recent years, although improved connection devices have proposed split-type bushings or modular designs, problems such as redundant sealing structures and chaotic multi-core cable arrangement still exist. Therefore, there is an urgent need for a cable connection technology solution that combines high protection, multi-material compatibility, ease of operation, and long-term stability to meet the stringent requirements under complex working conditions. Utility Model Content

[0008] The purpose of this utility model is to provide a bolt-type cable connection device to solve the problems of insufficient connection stability, low protection level, poor compatibility and complicated installation and maintenance of existing products. Through the structural combination design of split protective sleeve, cage and connector, it can achieve quick assembly, high reliability sealing and adaptability to multi-core cables.

[0009] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a bolt-type cable connection device, comprising a split protective sleeve, a retainer, a connector, a sealing ring, a locking element, and a sealing sleeve. The retainer is disposed inside the split protective sleeve, the connector is disposed on the retainer, the sealing ring is sleeved on the retainer, and the sealing sleeve and the locking element are disposed at both ends of the split protective sleeve. The locking element and the split protective sleeve are connected by threads.

[0010] In the aforementioned bolt-type cable connection device, the retainer includes a main body structure, a concave arc portion, a limiting recess, an isolation protrusion, and / or a weight-reducing channel. Multiple concave arc portions are arranged in a ring array on the main body structure. Multiple limiting recesses are arranged in a ring array on the main body structure. The isolation protrusion is located on the end faces at both ends of the main body structure. The weight-reducing channel is located on the main body structure. Both the concave arc portion and the limiting recess are through structures, and the concave arc portion is located between two adjacent limiting recesses.

[0011] In the aforementioned bolt-type cable connection device, the limiting recess includes an opening provided on the wall of the main body structure, and a C-shaped recess connected to the opening and recessed into the main body structure, with the connector provided on the C-shaped recess.

[0012] In the aforementioned bolt-type cable connection device, the split protective sleeve includes a first sleeve and a second sleeve bolted to the first sleeve. Both the first sleeve and the second sleeve include an A-section section pipe and a B-section section pipe integrally connected or threadedly connected to the A-section section pipe. The cross-sectional area of ​​the A-section section pipe is larger than the cross-sectional area of ​​the B-section section pipe.

[0013] In the aforementioned bolt-type cable connection device, the sealing ring is disposed between the first sleeve and the second sleeve; the sealing ring includes protrusions corresponding to multiple concave arc portions, and the protrusions are provided with round holes for bolt connection.

[0014] In the aforementioned bolt-type cable connection device, the connector includes a connecting body, a through channel disposed on the connecting body, and a first threaded hole and a second threaded hole disposed on the planar portion of the connecting body; the connector is provided with an observation hole, which is disposed on the connecting body and communicates with the through channel; and two limiting protrusions are provided inside the connector, which are symmetrically arranged along the centerline.

[0015] In the aforementioned bolt-type cable connection device, the thickness D1 between the through channel and the planar portion of the connecting body is greater than the thickness D2 between the through channel and the arc-shaped portion of the connecting body.

[0016] In the aforementioned bolt-type cable connection device, the connector has a positioning layer located in the through channel, and a first groove is formed on one side of the positioning layer and a second groove is formed on the other side of the positioning layer. The positioning layer is disposed between the first threaded hole and the second threaded hole.

[0017] In the aforementioned bolt-type cable connection device, the connector further includes a first bolt and a second bolt. The first bolt passes through a first threaded hole and is threadedly connected to the first threaded hole, and the second bolt passes through a second threaded hole and is threadedly connected to the second threaded hole.

[0018] Compared with existing technologies, this utility model, through its structural combination design of a split protective sleeve, retainer, and connectors, achieves a stable connection of cable cores, while providing high protection levels and sealing performance. It is simple to install and maintain, and suitable for multi-core cable connections. The split protective sleeve, combined with a sealing sleeve and locking components, achieves IP65 and higher protection levels, meeting the requirements of harsh environments such as humid conditions. The split protective sleeve design allows for disassembly and partial maintenance without requiring overall replacement, simplifying maintenance. The modular connectors better meet production needs, enabling standardized production and reducing production costs. The retainer with its isolation protrusion effectively positions the cable cores. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0020] Figure 1 This is a structural schematic diagram of the bolt-type cable connection device of this utility model;

[0021] Figure 2 This is an exploded view of the bolt-type cable connection device of this utility model;

[0022] Figure 3 This is a schematic diagram of a cage structure according to an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the cage structure according to another embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the connector structure according to an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the connector structure according to another embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of the structure of the bolt-connected split protective sleeve of this utility model;

[0027] Figure 8 This is a schematic diagram of the structure of the inner limiting protrusion of the connector of this utility model;

[0028] Figure 9 This is a schematic diagram of the connector of this utility model with built-in cable cores of different specifications.

[0029] Figure label:

[0030] 1-Split-type protective sleeve, 101-First sleeve, 1021-Section A section pipe, 1022-Section B section pipe, 102-Second sleeve;

[0031] 2-Cage, 201-Body structure, 202-Weight reduction channel, 203-Concave arc portion, 204-Isolation protrusion, 205-Limiting recess, 2051-Opening, 2052-C-shaped recess;

[0032] 3-Connector, 301-Connector body, 302-Through channel, 303-Limiting protrusion, 304-Observation hole, 305-First threaded hole, 306-Second threaded hole, 307-Curved surface, 308-Flat surface, 309-Positioning layer, 3010-First groove, 3011-Second groove, 3012-First bolt, 3013-Second bolt.

[0033] 4-Sealing ring, 401-Protrusion, 402-Round hole, 5-Locking element, 6-Sealing sleeve, 7-Recess, 8-Center line.

[0034] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Detailed Implementation

[0035] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0036] Embodiment 1 of this utility model: as follows Figure 1-5 , Figure 7-9 As shown, a bolt-type cable connection device includes a split-type protective sleeve 1, a retainer 2, a connector 3, a sealing ring 4, a locking element 5, and a sealing sleeve 6. The retainer 2 is disposed inside the split-type protective sleeve 1, the connector 3 is disposed on the retainer 2, the sealing ring 4 is sleeved on the retainer 2, and the sealing sleeve 6 and the locking element 5 are disposed at both ends of the split-type protective sleeve 1. The locking element 5 is positioned between the retainer 1 and the split-type protective sleeve 1 to tightly fix multiple connectors 3 onto the retainer 2, thereby achieving a tight connection of multiple connectors 3.

[0037] The sealing effect of the bolt-type cable connection device is improved by using sealing ring 4 and sealing sleeve 6, thereby increasing the protection level to IP65 or higher.

[0038] The locking element 5 secures the cable with outer sheath to the split protective sleeve 1, effectively suppressing the displacement of the cable segment inside the split protective sleeve 1. This significantly improves the protective stability of the bolt-type cable connection device under dynamic working conditions, prevents displacement caused by cable movement, and ensures the stability of the cable connection.

[0039] Specifically, the retainer 2 includes a body structure 201, a concave arc portion 203, a limiting recess 205, an isolation protrusion 204, and / or a weight-reducing channel 202. Multiple concave arc portions 203 are arranged in a ring array on the body structure 201. Multiple limiting recesses 205 are arranged in a ring array on the body structure 201. The isolation protrusion 204 is located on the end faces of both ends of the body structure 201. The weight-reducing channel 202 is located on the body structure 201. Both the concave arc portion 203 and the limiting recess 205 are through structures. The concave arc portion 203 is located between two adjacent limiting recesses 205.

[0040] The weight of the retainer 2 is reduced by using the weight reduction channel 202, thereby reducing the overall weight of the bolt-type cable connection device.

[0041] Furthermore, the limiting recess 205 includes an opening 2051 provided on the wall of the main body structure 201, and a C-shaped recess 2052 connected to the opening 2051 and recessed in the main body structure 201, with the connecting member 3 provided on the C-shaped recess 2052.

[0042] The outer wall of the main body structure 201 is circumferentially machined with an array of concave arc portions 203, whose radius of curvature is precisely matched with the protrusion 401 of the sealing ring plate 4, achieving axial positioning through circumferential fitting. The limiting recess 205 adopts a C-shaped recess 2052 structure to precisely constrain the assembly position of the connector 3, so that the C-shaped recess 2052 is fixed on the retainer 2. At the same time, the isolation protrusion 204 spatially separates adjacent exposed wire cores through physical barriers, forming a reliable wire core isolation zone, effectively avoiding the risk of short circuit between wire cores during installation and use, thereby improving protection performance.

[0043] Furthermore, the split-type protective sleeve 1 includes a first sleeve 101 and a second sleeve 102 bolted to the first sleeve 101. Both the first sleeve 101 and the second sleeve 102 include an A-section section pipe 1021 and a B-section section pipe 1022 integrally connected or threadedly connected to the A-section section pipe 1021. The cross-sectional area of ​​the A-section section pipe 1021 is larger than the cross-sectional area of ​​the B-section section pipe 1022.

[0044] Furthermore, the sealing ring 4 is disposed between the first sleeve 101 and the second sleeve 102; the sealing ring 4 includes a protrusion 401 corresponding to a plurality of concave arc portions 203, and the protrusion 401 is provided with a round hole 402 for bolt connection.

[0045] The round hole 402 is used for bolt connection. The first sleeve 101, the sealing ring 4 and the second sleeve 102 are connected by bolts, and then the first sleeve 101 and the second sleeve 102 are locked by nuts.

[0046] Specifically, the connector 3 includes a connecting body 301, a through channel 302 disposed on the connecting body 301, and a first threaded hole 305 and a second threaded hole 306 disposed on the flat portion 308 of the connecting body 301; an observation hole 304 is disposed on the arc portion 307 of the connecting body 301 and communicates with the through channel 302; two limiting protrusions 303 are disposed symmetrically along the centerline 8 inside the connector 3.

[0047] Furthermore, the thickness D1 between the through channel 302 and the planar portion 308 of the connecting body 301 is greater than the thickness D2 between the through channel 302 and the arcuate portion 307 of the connecting body 301. A certain thickness D2 is provided to ensure a certain engagement length between the first bolt 3012 and the first threaded hole 305, and between the second bolt 3013 and the second threaded hole 306, ensuring that the first bolt 3012 and the second bolt 3013 have sufficient strength to press the wire core within the through channel 302.

[0048] Specifically, the connector 3 also includes a first bolt 3012 and a second bolt 3013. The first bolt 3012 passes through and is threadedly connected to the first threaded hole 305, and the second bolt 3013 passes through and is threadedly connected to the second threaded hole 306.

[0049] The opening 2051 is provided to facilitate the tightening of the first bolt 3012 and the second bolt 3013 on the connector 3.

[0050] In this example, the split-type sleeve structure composed of the first sleeve 101 and the second sleeve 102, using a bolted assembly method, enables quick assembly and disassembly of the bolt-type cable connection device, making installation and maintenance easier. This split design not only facilitates disassembly and maintenance in confined spaces but also significantly improves maintenance economy by partially replacing damaged sleeve components, while maintaining the integrity of the main structure.

[0051] In this example, a stepped limiting structure design is adopted, with a large-diameter section A tube 1021 and a small-diameter section B tube 1022 forming a significant diameter transition. This variable-diameter tube segment creates a mechanical interference limiting mechanism in the axial direction, effectively suppressing cable movement under dynamic load conditions. Simultaneously, at the junction of section A tube 1021 and section B tube 1022, an arc-shaped transition structure allows for the gradual release of bending stress in the cable, significantly reducing the risk of fretting wear and stress concentration.

[0052] Embodiment 2 of this utility model: as follows Figure 1-4 , Figure 6-7 and Figure 9 As shown, a bolt-type cable connection device includes a split protective sleeve 1, a retainer 2, a connector 3, a sealing ring 4, a locking element 5, and a sealing sleeve 6. The retainer 2 is disposed inside the split protective sleeve 1, the connector 3 is disposed on the retainer 2, the sealing ring 4 is sleeved on the retainer 2, and the sealing sleeve 6 and the locking element 5 are disposed at both ends of the split protective sleeve 1. The locking element 5 is threadedly connected to the split protective sleeve 1.

[0053] The retainer 2 includes a body structure 201, a concave arc portion 203, a limiting recess 205, an isolation protrusion 204, and / or a weight-reducing channel 202. Multiple concave arc portions 203 are arranged in a ring array on the body structure 201. Multiple limiting recesses 205 are arranged in a ring array on the body structure 201. The isolation protrusion 204 is located on the end faces of both ends of the body structure 201. The weight-reducing channel 202 is located on the body structure 201. Both the concave arc portion 203 and the limiting recess 205 are through structures. The concave arc portion 203 is located between two adjacent limiting recesses 205.

[0054] Specifically, the limiting recess 205 includes an opening 2051 provided on the wall of the main body structure 201, and a C-shaped recess 2052 connected to the opening 2051 and recessed in the main body structure 201, with the connecting member 3 provided on the C-shaped recess 2052.

[0055] Furthermore, the split-type protective sleeve 1 includes a first sleeve 101 and a second sleeve 102 bolted to the first sleeve 101. Both the first sleeve 101 and the second sleeve 102 include an A-section section pipe 1021 and a B-section section pipe 1022 integrally connected or threadedly connected to the A-section section pipe 1021. The cross-sectional area of ​​the A-section section pipe 1021 is larger than the cross-sectional area of ​​the B-section section pipe 1022.

[0056] The sealing ring 4 is disposed between the first sleeve 101 and the second sleeve 102; the sealing ring 4 includes a protrusion 401 corresponding to a plurality of concave arc portions 203, and the protrusion 401 is provided with a round hole 402 for bolt connection.

[0057] Unlike Embodiment 1, in this example, the connector 3 has a positioning layer 309 located within the through channel 302. A first cavity 3010 is formed on one side of the positioning layer 309, and a second cavity 3011 is formed on the other side. The positioning layer 309 is disposed between the first threaded hole 305 and the second threaded hole 306. The positioning layer 309 is used to form the first cavity 3010 and the second cavity 3011, and serves to position the length of the cable placed in the first cavity 3010 or the second cavity 3011. When a stripped cable core is placed into the first cavity 3010 or the second cavity 3011 and touches the positioning layer 309, it indicates that the cable core has been placed in place, thereby achieving the purpose of effectively positioning the cable core.

[0058] Specifically, the connector 3 also includes a first bolt 3012 and a second bolt 3013. The first bolt 3012 passes through and is threadedly connected to the first threaded hole 305, and the second bolt 3013 passes through and is threadedly connected to the second threaded hole 306.

Claims

1. A bolt-type cable connection device, characterized in that, The device includes a split protective sleeve (1), a retainer (2), a connector (3), a sealing ring (4), a locking element (5), and a sealing sleeve (6). The retainer (2) is located inside the split protective sleeve (1), the connector (3) is located on the retainer (2), the sealing ring (4) is sleeved on the retainer (2), and the sealing sleeve (6) and the locking element (5) are located at both ends of the split protective sleeve (1). The locking element (5) is threadedly connected to the split protective sleeve (1).

2. The bolt-type cable connection device according to claim 1, characterized in that, The retainer (2) includes a body structure (201), a concave arc portion (203), a limiting recess (205), an isolation protrusion (204), and / or a weight-reducing channel (202). The concave arc portions (203) are multiple and arranged in a ring array on the body structure (201). The limiting recesses (205) are multiple and arranged in a ring array on the body structure (201). The isolation protrusions (204) are located on the end faces of both ends of the body structure (201). The weight-reducing channel (202) is located on the body structure (201). The concave arc portions (203) and the limiting recesses (205) are both through structures. The concave arc portion (203) is located between two adjacent limiting recesses (205).

3. The bolt-type cable connection device according to claim 2, characterized in that, The limiting recess (205) includes an opening (2051) disposed on the wall of the main body structure (201) and a C-shaped recess (2052) connected to the opening (2051) and recessed in the main body structure (201), and the connecting member (3) is disposed on the C-shaped recess (2052).

4. A bolt-type cable connection device according to claim 3, characterized in that, The split protective sleeve (1) includes a first sleeve (101) and a second sleeve (102) bolted to the first sleeve (101). Both the first sleeve (101) and the second sleeve (102) include an A-section section pipe (1021) and a B-section section pipe (1022) integrally connected or threadedly connected to the A-section section pipe (1021). The cross-sectional area of ​​the A-section section pipe (1021) is larger than the cross-sectional area of ​​the B-section section pipe (1022).

5. A bolt-type cable connection device according to claim 4, characterized in that, The sealing ring (4) is disposed between the first sleeve (101) and the second sleeve (102); the sealing ring (4) includes a protrusion (401) corresponding to a plurality of concave arc portions (203), and the protrusion (401) is provided with a round hole (402) for bolt connection.

6. A bolt-type cable connection device according to claim 5, characterized in that, The connector (3) includes a connecting body (301), a through channel (302) disposed on the connecting body (301), and a first threaded hole (305) and a second threaded hole (306) disposed on the connecting body (301).

7. A bolt-type cable connection device according to claim 6, characterized in that, The connector (3) is provided with an observation hole (304), which is located on the connecting body (301) and communicates with the through channel (302); the connector (3) is provided with two limiting protrusions (303) symmetrically arranged along the center line (8).

8. A bolt-type cable connection device according to claim 7, characterized in that, The thickness D1 between the through channel (302) and the planar portion (308) of the connecting body (301) is greater than the thickness D2 between the through channel (302) and the arc portion (307) of the connecting body (301).

9. A bolt-type cable connection device according to claim 5, characterized in that, The connector (3) has a positioning layer (309) located in the through channel (302), and a first cavity (3010) is formed on one side of the positioning layer (309), and a second cavity (3011) is formed on the other side of the positioning layer (309). The positioning layer (309) is disposed between the first threaded hole (305) and the second threaded hole (306).

10. A bolt-type cable connection device according to claim 8 or 9, characterized in that, The connector (3) further includes a first bolt (3012) and a second bolt (3013), wherein the first bolt (3012) passes through and is threadedly connected to the first threaded hole (305), and the second bolt (3013) passes through and is threadedly connected to the second threaded hole (306).

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