A cold shrink cable terminal

Abstract

The present invention relates to the field of cable terminals, and in particular to a cold shrink cable terminal, comprising a terminal shell, both ends of which are open, and cables are inserted into the openings, and characterized in that two groups of fixing rods are fixedly installed inside the terminal shell, and two groups of symmetrically arranged sealing components are slidably arranged at the fixing rods, and tubular sealed air bags are connected between the sealed components to preliminarily block the gaps between the cables. In normal temperature weather, the present invention effectively seals the cable connection through the sealed air bags, and after the temperature reduction treatment, the sealed air bags affected by the cold shrinkage drive the sealed components to move, thereby sealing the internal space, and can effectively divert rainwater to avoid affecting the internal cables.

Description

Technical Field

[0001] The invention relates to the technical field of cable terminals, and in particular to a cold shrink cable terminal. Background Art

[0002] Cold shrink cable terminal head is a component of various cable accessories made of elastomer materials that are injection vulcanized in the factory, then expanded and lined with plastic spiral supports. During on-site installation, these pre-expanded parts are put on the treated cable ends or joints, and the internal supporting plastic spiral strips are pulled out and pressed against the cable insulation to form a cable accessory. Because it relies on elastic retraction force at room temperature, rather than heat shrink cable accessories that need to be heated and shrunk by fire, it is commonly known as cold shrink cable accessories. The cable terminal head integrates waterproofing, stress control, shielding, and insulation. It has good electrical and mechanical properties and can be used for a long time under various harsh environmental conditions. It has the advantages of light weight and easy installation. The cable terminal head is widely used in various fields such as power, petrochemical, metallurgy, railway ports and construction.

[0003] However, most cables are located outdoors, where they are easily affected by external weather factors. Rainwater produced on rainy and snowy days can easily flow into the connection gaps of cable terminals, affecting the effective use of internal cables. For this reason, we propose a cold shrink cable terminal. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a cold shrink cable terminal.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A cold shrink cable terminal comprises a terminal shell, both ends of which are open and cables are inserted into the openings, two sets of fixing rods are fixedly installed inside the terminal shell, and two sets of symmetrically arranged sealing components are slidably arranged on the fixing rods, and tubular sealing air bags are connected between the sealing components to preliminarily block the gaps between the cables;

[0007] The sealed component includes a trumpet-shaped sleeve cover shell with openings at both ends. Several groups of interference components are fixedly installed in a circular array at the outer edge of the sleeve cover shell, and a snap-on component corresponding to the interference component is provided at the end face, thereby effectively ensuring that the sealed component as a whole can eventually effectively interfere with the inside of the terminal shell during the movement inside the terminal shell, thereby ensuring actual stability.

[0008] As a preferred technical solution of the present application, the interference component includes a fixed tube fixedly installed on the outer curved surface of the sleeve cover, a telescopic rod is inserted at the break of the fixed tube, and one end of the telescopic rod is connected to the interference rod, and a plurality of groups of first slots adapted to the interference rod are opened on the inner wall of the terminal shell to ensure that the interference component is effectively engaged with the inner wall of the terminal shell during the telescopic adjustment process, thereby preliminarily ensuring the stability of the sealed component inside the terminal shell.

[0009] As a preferred technical solution of the present application, one end of the telescopic rod located inside the fixed tube is fixedly connected to an anti-falling plate to prevent it from falling off during actual assembly and use, and a spring is bonded between the anti-falling plate and the inner wall of one end of the fixed tube, thereby ensuring that the resistance rod can automatically pop out during actual use, which is convenient for effective automatic locking when following the overall movement of the sealed component, and is convenient for actual operation and use.

[0010] As a preferred technical solution of the present application, a circular groove corresponding to the interference component is provided on the end face of the sleeve cover, and the clamping component is arranged in the groove, including a clamping rod extending out of the circular groove, and a second slot adapted to the clamping rod is provided on the inner wall of the terminal shell, and one end of the clamping rod is connected to a spring 2 connected to the inner wall of the groove on the sleeve cover, to ensure that the clamping rod automatically pops out during actual use, facilitating actual clamping and convenient operation.

[0011] As a preferred technical solution of the present application, the diameter of the locking rod is larger than the diameter of the interference rod, and the diameter of the second slot is larger than the diameter of the first slot. The second slots on the upper and lower sides are located between the first slots on the upper and lower sides, ensuring that during the movement of the two groups of sealed components, the locking component will not be locked in the first slot, avoiding interference in the plug-in process and ensuring that the actual plug-in is carried out effectively and stably.

[0012] As a preferred technical solution of the present application, two sets of guide holes for fixing rods are opened in the vertical direction on the sleeve cover, thereby effectively ensuring the stability of the entire sealed component when the sealed airbag contracts when it is cooled and moves, and avoiding shaking.

[0013] As a preferred technical solution of the present application, a plurality of drainage holes are provided on the terminal shell to facilitate the drainage of water separated by the trumpet-shaped drainage holes, avoid internal interference by moisture, and ensure effective conduction of the internal cables.

[0014] The beneficial effects of the present invention are:

[0015] 1. Under the action of the sealed airbag, the gap between the two groups of cables is effectively sealed by the sealed airbag, thereby improving the actual airtightness;

[0016] 2. When the temperature drops and it rains, the sealed airbag shrinks under the action of temperature. During the shrinkage of the sealed airbag, the sealed component is driven to move toward each other along the fixed rod. During the movement of the sealed components toward each other, the clamping rod on the clamping mechanism is clamped in the second clamping groove under the action of spring 2. At this time, the resistance component moves to the first clamping groove, and drives the telescopic rod and the resistance rod to extend out under the action of spring 1 and clamp into the first clamping groove, thereby effectively realizing the position locking of the sealed component. Through the trumpet-shaped setting of the sleeve cover, the rainwater from the outside flows into the inside of the terminal shell and is finally discharged through the drainage hole under the diversion effect of the sleeve cover, thereby avoiding the influence of rainwater on the internal cables and ensuring actual and effective use.

[0017] In summary, in normal temperature weather, the cable connections can be effectively sealed through the sealed airbags. After the temperature is lowered, the sealed airbags affected by the cold shrinkage drive the sealed components to move, thereby sealing the internal space and effectively diverting rainwater to avoid affecting the internal cables. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of a cold shrink cable terminal proposed by the present invention;

[0019] Figure 2 A schematic cross-sectional view of a cold shrink cable terminal proposed by the present invention;

[0020] Figure 3 This is a schematic diagram of the internal cross-sectional structure of a cold shrink cable terminal proposed by the present invention;

[0021] Figure 4 This is a schematic diagram of the enlarged structure of point A of a cold shrink cable terminal proposed by the present invention;

[0022] Figure 5 A schematic structural diagram of a closed component of a cold shrink cable terminal proposed by the present invention;

[0023] Figure 6 The present invention provides a schematic cross-sectional structural diagram of an interference component of a cold shrink cable terminal.

[0024] In the figure: 1. terminal shell; 2. drainage hole; 3. cable; 4. fixing rod; 5. sealing component; 51. sleeve cover; 52. resistance component; 521. fixing tube; 522. spring 1; 523. telescopic rod; 524. resistance rod; 53. spring 2; 54. clamping rod; 55. guide hole; 6. sealed airbag. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0026] Reference Figure 1-6 A cold shrink cable terminal comprises a terminal housing 1, both ends of the terminal housing 1 are open, and cables 3 are inserted into the openings, characterized in that two groups of fixing rods 4 are fixedly installed inside the terminal housing 1, and two groups of symmetrically arranged sealing components 5 are slidably arranged on the fixing rods 4, and tubular sealing air bags 6 are connected between the sealing components 5 to preliminarily block the gaps between the cables 3;

[0027] The sealing component 5 includes a trumpet-shaped sleeve cover 51, both ends of which are opened, and a plurality of groups of interference components 52 are fixedly installed in a circular array at the outer edge of the sleeve cover 51, and a snap-on component corresponding to the interference component 52 is provided at the end surface, thereby effectively ensuring that the sealing component 5 as a whole can eventually effectively interfere with the inside of the terminal shell 1 during the movement inside the terminal shell 1, thereby ensuring actual stability.

[0028] Reference Figure 4 and Figure 6 The resistance component 52 includes a fixed tube 521 fixedly mounted on the outer curved surface of the sleeve cover 51, a telescopic rod 523 is inserted at the break of the fixed tube 521, and one end of the telescopic rod 523 is connected to a resistance rod 524, and a plurality of groups of first slots adapted to the resistance rod 524 are opened on the inner wall of the terminal shell 1 to ensure that the resistance component 52 is effectively engaged with the inner wall of the terminal shell 1 during the telescopic adjustment process, thereby preliminarily ensuring the stability of the sealed component 5 inside the terminal shell 1.

[0029] One end of the telescopic rod 523 located inside the fixed tube 521 is fixedly connected to an anti-falling plate to prevent it from falling off during actual assembly and use, and a spring 522 is bonded between the anti-falling plate and the inner wall of one end of the fixed tube 521, thereby ensuring that the resistance rod 524 can automatically pop out during actual use, which is convenient for effective automatic locking when following the overall movement of the sealed component 5, and is convenient for actual operation and use.

[0030] Reference Figure 4 A circular groove corresponding to the abutment component 52 is provided on the end face of the sleeve cover 51, and the clamping component is arranged in the groove, including a clamping rod 54 extending out of the circular groove, and a second slot adapted to the clamping rod 54 is provided on the inner wall of the terminal shell 1, and one end of the clamping rod 54 is connected to a spring 2 53 connected to the inner wall of the groove on the sleeve cover 51, to ensure that the clamping rod 54 is automatically popped out during actual use, which is convenient for actual clamping and convenient operation.

[0031] The diameter of the clamping rod 54 is larger than the diameter of the abutment rod 524, and the diameter of the second slot is larger than the diameter of the first slot. The second slots on the upper and lower sides are located between the first slots on the upper and lower sides, ensuring that during the movement of the two sets of sealed components 5, the clamping components will not be clamped in the first slots, avoiding interference in the plug-in process and ensuring that the actual plug-in is carried out effectively and stably.

[0032] Reference Figure 5 Two sets of guide holes 55 for the fixing rods 4 to pass through are provided on the sleeve shell 51 in the vertical direction, thereby effectively ensuring the stability of the entire closed component 5 when the closed airbag 6 contracts when it is cooled and moves, and avoiding shaking.

[0033] Reference Figure 1 A plurality of drainage holes 2 are provided on the terminal housing 1 to facilitate the drainage of the water separated by the trumpet-shaped drainage holes 2, thereby avoiding the internal interference by water and ensuring the effective conduction of the internal cables.

[0034] Workflow: First, the cables 3 at both ends are passed through and passed through the sealed component 5. Under the action of the sealed airbag 6, the gap between the two groups of cables 3 is effectively blocked by the sealed airbag 6, thereby improving the actual airtightness;

[0035] When the temperature drops and it rains, the sealed airbag 6 shrinks under the action of temperature. During the shrinkage of the sealed airbag 6, it drives the sealed component 5 to move toward each other along the fixed rod 4. During the movement of the sealed component 5 toward each other, the clamping rod 54 on the clamping mechanism is clamped in the second clamping groove under the action of the spring 2 53. At this time, the resistance component 52 moves to the first clamping groove, and drives the telescopic rod 523 and the resistance rod 524 to extend out under the action of the spring 1 522, and clamps into the first clamping groove, thereby effectively realizing the position locking of the sealed component 5. Through the trumpet-shaped setting of the sleeve cover 51, the rainwater from the outside flows into the inside of the terminal shell 1 and is finally discharged through the drainage hole 2 under the diversion effect of the sleeve cover 51, thereby avoiding the influence of rainwater on the internal cable 3 and ensuring actual and effective use.

[0036] Finally, it should be noted that in the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0037] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cold shrink cable terminal, comprising a terminal housing (1), wherein both ends of the terminal housing (1) are open and a cable (3) is inserted into the opening, wherein: Two groups of fixing rods (4) are fixedly installed inside the terminal housing (1), and two groups of symmetrically arranged sealing components (5) are slidably arranged on the fixing rods (4), and tubular sealing airbags (6) are connected between the sealing components (5) for preliminarily sealing the gaps between the cables (3); The sealing component (5) comprises a trumpet-shaped sleeve cover (51), the two ends of the sleeve cover (51) are open, a plurality of groups of abutment components (52) are fixedly installed in a circular array at the outer edge of the sleeve cover (51), and a clamping component corresponding to the abutment component (52) is provided at the end surface, thereby effectively ensuring that the sealing component (5) as a whole can eventually effectively abut inside the terminal shell (1) during the movement inside the terminal shell (1), thereby ensuring actual stability, the abutment component (52) comprises a fixing tube (521) fixedly installed on the outer curved surface of the sleeve cover (51), a telescopic rod (523) is inserted at the fracture of the fixing tube (521), and one end of the telescopic rod (523) is connected to the abutment rod (524), and the inner portion of the terminal shell (1) is provided with a plurality of abutment components (524). A plurality of groups of first slots adapted to the abutment rods (524) are provided on the wall, ensuring that the abutment assembly (52) is effectively engaged with the inner wall of the terminal housing (1) during the telescopic adjustment process, thereby preliminarily ensuring the stability of the sealing assembly (5) inside the terminal housing (1); a circular groove corresponding to the abutment assembly (52) is provided on the end surface of the sleeve cover (51); the engaging assembly is arranged in the groove, including an engaging rod (54) extending out from the circular groove; a second slot adapted to the engaging rod (54) is provided on the inner wall of the terminal housing (1); and one end of the engaging rod (54) is connected to a second spring (53) connected to the inner wall of the groove on the sleeve cover (51), ensuring that the engaging rod (54) is automatically ejected when actually used, thereby facilitating actual engagement and convenient operation.

2. A cold shrink cable terminal according to claim 1, characterized in that: One end of the telescopic rod (523) located inside the fixed tube (521) is fixedly connected to an anti-drop plate to prevent it from dropping out during actual assembly and use, and a spring (522) is bonded between the anti-drop plate and the inner wall of one end of the fixed tube (521), thereby ensuring that the abutment rod (524) can automatically pop out during actual use, facilitating effective automatic locking when following the overall movement of the sealed component (5), thereby facilitating actual operation and use.

3. A cold shrink cable terminal according to claim 1, characterized in that: The diameter of the clamping rod (54) is greater than the diameter of the abutting rod (524), and the diameter of the second slot is greater than the diameter of the first slot. The second slots on the upper and lower sides are located between the first slots on the upper and lower sides, ensuring that during the movement of the two sets of sealed components (5), the clamping components will not be clamped in the first slots, thereby avoiding interference in the plugging process and ensuring that the actual plugging is carried out effectively and stably.

4. A cold shrink cable terminal according to claim 1, characterized in that: The sleeve cover (51) is provided with two groups of guide holes (55) in the vertical direction for the fixing rods (4) to penetrate, thereby effectively ensuring the stability of the entire sealed component (5) when the sealed airbag (6) moves after it contracts when exposed to cold, thereby avoiding shaking.

5. A cold shrink cable terminal according to claim 1, characterized in that: The terminal housing (1) is provided with a plurality of drainage holes (2) to facilitate the drainage of water separated by the trumpet-shaped drainage holes (2), thereby avoiding internal interference by water and ensuring effective conduction of the internal cables.

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