Damping cable joint for high-voltage cable

Abstract

The utility model discloses a shock-absorbing cable joint for high-voltage cables, which belongs to the field of cable joints and comprises a connecting part for connecting two cables together, and an insulating waterproof layer is coated on the outer side of the connecting part to form a joint part of the two cables. The inner sleeve is fixedly arranged on the connector part in a sleeving manner; the outer sleeve sleeves the outer side of the inner sleeve; the first elastic component elastically acts on the outer sleeve along the axial direction of the inner sleeve; the multiple sets of second elastic assemblies are arranged and evenly distributed on the peripheral wall of the inner sleeve in a surrounding mode, and each set of second elastic assemblies elastically abut against the inner wall of the outer sleeve; the first elastic assembly is matched with the second elastic assembly for buffering, and therefore vibration borne by the connector part can be reduced.

Description

Technical Field

[0001] The utility model belongs to the field of cable joints, in particular to a high-voltage cable shock-absorbing cable joint. Background Art

[0002] High-voltage cable connectors are devices used to connect two high-voltage cables. They ensure the continuity of the cable line and achieve stable current transmission; they can effectively prevent moisture and humidity from entering, ensure the insulation performance of the cable, and withstand certain mechanical forces such as tension and pressure.

[0003] However, since the high-voltage cable is at high altitude, it will be impacted by strong airflow in some severe weather, causing the high-voltage cable to be tightened and vibrate violently, and the existing cable joint connection components mostly compress the cable core by bolts, and wrap an insulating layer and a waterproof layer on the outside to achieve the connection between the two cables. When the cable is subjected to severe vibration, the core compressed by the bolts will gradually loosen and be damaged, or even fall off, and the insulating layer or waterproof layer wrapped at the cable joint may also be broken or loosened under the action of traction. Taking all the above behaviors into consideration, the cable joint may have no buffering effect in severe weather, which may affect the connection firmness of the cable joint and easily cause damage to the cable joint. Summary of the invention

[0004] The embodiment of the utility model provides a high-voltage cable shock-absorbing cable connector to solve the problems in the prior art.

[0005] The embodiment of the utility model adopts the following technical scheme: a high-voltage cable shock-absorbing cable joint, including a connecting component for connecting two cables together, and an insulating waterproof layer is coated on the outside of the connecting component to form a joint part of the two cables; it also includes: an inner sleeve, fixedly sleeved on the joint part; an outer sleeve, sleeved on the outside of the inner sleeve; a first elastic component, elastically acting on the outer sleeve along the axial direction of the inner sleeve; a second elastic component, which is configured in a plurality of groups and evenly distributed around the outer peripheral wall of the inner sleeve, and each group of second elastic components elastically contacts the inner wall of the outer sleeve; the first elastic component cooperates with the second elastic component for buffering, thereby reducing the vibration of the joint part.

[0006] Preferably, the first elastic component includes two annular plates and two first springs, the two first springs are both sleeved on the joint part and are respectively located at the two ends of the inner sleeve; the two annular plates are coaxially installed on the two ends of the outer sleeve, and each first spring elastically contacts the inner end of the corresponding annular plate.

[0007] Preferably, a gap is left between each annular plate and the outer wall of the joint portion.

[0008] Preferably, each group of second elastic components includes a guide column and an elastic head, the elastic head is provided with a sliding hole that slidably fits with the guide column, and a second spring is installed in the sliding hole to achieve elastic connection between the elastic head and the guide column.

[0009] Preferably, a circular baffle is coaxially provided at the outer end of the guide column, the diameter of the circular baffle is larger than the diameter of the guide column, the circular baffle is located in the corresponding sliding hole, and an annular limit block is provided at the open end of the sliding hole, and the inner diameter of the limit block is adapted to the diameter of the guide column.

[0010] Preferably, the outer end of the elastic head is configured as a rounded surface.

[0011] Preferably, a hemispherical groove is provided at the outer end of the elastic head, and a ball is embedded in the hemispherical groove.

[0012] Preferably, a leather sealing sleeve is sleeved on the outer cable end of each annular plate, one end of the leather sealing sleeve is connected to the corresponding annular plate, and the other end of the leather sealing sleeve is adhered to the cable through an insulating tape.

[0013] At least one of the above technical solutions adopted in the embodiment of the utility model can achieve the following beneficial effects:

[0014] In the utility model, the impact of external force or airflow on the cable joint directly acts on the outer sleeve, and the vibration of the outer sleeve is buffered by the first elastic component and the second elastic component, thereby reducing the vibration of the joint, increasing the service life of the joint, and preventing the insulating waterproof layer or the cable connection from loosening or falling off due to vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 2 It is a three-dimensional structural cross-sectional view of the utility model;

[0018] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0019] Figure 4 It is an exploded view of the local structure of the inner sleeve and the second elastic component of the utility model;

[0020] Figure 5 This is an assembly diagram of the first embodiment of the elastic head of the utility model;

[0021] Figure 6 is an exploded view of the second elastic component;

[0022] Figure 7 This is an assembly diagram of the second embodiment of the elastic head of the utility model;

[0023] Reference numerals

[0024] 1-joint; 2-inner sleeve; 3-outer sleeve; 4-first elastic component; 41-annular plate; 42-first spring; 5-second elastic component; 51-guide column; 511-circular baffle; 52-elastic head; 521-sliding hole; 522-limiting block; 523-hemispherical groove; 524-ball; 53-second spring; 6-leather sealing sleeve; 7-cable. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in combination with the specific embodiments of the utility model and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] The technical solutions provided by various embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0027] Reference Figures 1 to 7 As shown, an embodiment of the utility model provides a high-voltage cable shock-absorbing cable joint, including a connecting component for connecting two cable heads 7 together. The connecting component is a prior art, and its specific structure is not shown in the figure. It mainly includes a conductor connecting tube for connecting the conductors of the cable 7 to ensure smooth transmission of current; and fixing and supporting components to ensure the stability of the joint structure.

[0028] An insulating waterproof layer is coated on the outside of the connecting component to provide good insulation performance and ensure insulation between phases and relative to the ground. Commonly used materials are heat shrink tubes, insulating tapes, etc., so as to form a joint part 1 (such as Figure 2 );

[0029] The high-voltage cable shock-absorbing cable joint also includes: an inner sleeve 2, which is fixedly sleeved on the joint part 1; an outer sleeve 3, which is sleeved on the outside of the inner sleeve 2; a first elastic component 4, which elastically acts on the outer sleeve 3 along the axial direction of the inner sleeve 2; and a second elastic component 5, which is configured in a plurality of groups and evenly distributed around the outer peripheral wall of the inner sleeve 2, and each group of second elastic components 5 elastically contacts the inner wall of the outer sleeve 3.

[0030] In some practical applications, firstly, when the connector 1 of the cable 7 is impacted by the crosswind or other external force along the direction of the cable 7, the first elastic component 4 can provide a certain force buffer to the connector 1 of the cable 7 under its elastic action, and the first elastic component 4 neutralizes the direct force on the connector 1 of the cable 7 to prevent the two cables 7 from falling off or loosening;

[0031] Secondly, when the connector 1 of the cable 7 is impacted by airflow or external force from other directions, the external force directly acts on the outer sleeve 3, and under the action of the second elastic component 5, a large amount of vibration is concentrated on the outer sleeve 3 and buffered by the second elastic component 5, thereby reducing the vibration impact on the inner sleeve 2 and the connector 1;

[0032] To sum up, the impact of external force or airflow on the connector part 1 of the cable 7 directly acts on the outer sleeve 3, and the outer sleeve 3 vibrates and is buffered by the first elastic component 4 and the second elastic component 5, thereby reducing the vibration of the connector part 1, improving the service life of the connector part 1, and preventing the insulating waterproof layer or the connection of the cable 7 from loosening or falling off due to vibration.

[0033] Specifically, Figure 2 and Figure 3 As shown, the first elastic component 4 includes two annular plates 41 and two first springs 42. The two first springs 42 are sleeved on the joint portion 1 and are respectively located at the two ends of the inner sleeve 2; the two annular plates 41 are coaxially installed at the two ends of the outer sleeve 3, and each first spring 42 elastically contacts the inner end of the corresponding annular plate 41;

[0034] The annular plate 41 is provided to prevent a large amount of impurities or dust in the air from entering the outer sleeve 3, and the annular plate 41 can also receive the wind impact along the direction of the cable 7 and be absorbed by the first spring 42, thereby reducing the direct impact on the joint part 1 and reducing the vibration of the joint part 1.

[0035] A gap is left between each annular plate 41 and the outer wall of the joint part 1 to ensure that the annular plate 41 can easily swing when the outer sleeve 3 is impacted by wind and swings along the direction of the cable 7, to avoid the annular plate 41 pressing against the outer wall of the cable 7 and affecting the buffering of the annular plate 41 and the first spring 42 to the wind force, and to prevent the surface of the cable 7 from being damaged by long-term friction of the annular plate 41.

[0036] Specifically, Figure 2 , Figures 4 to 7As shown, each group of second elastic components 5 includes a guide column 51 and an elastic head 52, the elastic head 52 is provided with a sliding hole 521 which is slidably matched with the guide column 51, and a second spring 53 is installed in the sliding hole 521 to realize the elastic connection between the elastic head 52 and the guide column 51, so that when the outer sleeve 3 is subjected to airflow directly impacting its outer wall, the second springs 53 in the multiple groups of second elastic components 5 can be used for buffering, thereby reducing the vibration of the joint part 1.

[0037] A circular baffle 511 is coaxially provided at the outer end of the guide column 51. The diameter of the circular baffle 511 is larger than the diameter of the guide column 51. The circular baffle 511 is located in the corresponding sliding hole 521. An annular limit block 522 is provided at the open end of the sliding hole 521. The inner diameter of the limit block 522 is adapted to the diameter of the guide column 51 to prevent the elastic head 52 from being dislocated from the guide column 51.

[0038] The elastic head 52 has at least two embodiments;

[0039] like Figure 5 As shown, the first embodiment of the elastic head 52: the outer end of the elastic head 52 is set as a rounded surface, and the rounded surface is pressed against the inner wall of the outer sleeve 3 by the elastic force of the second spring 53, so that the outer sleeve 3 is buffered by the second spring 53 when it is impacted by external force.

[0040] like Figure 7 As shown, a second embodiment of the elastic head 52: a hemispherical groove 523 is provided at the outer end of the elastic head 52, and a ball 524 is embedded in the hemispherical groove 523. The ball 524 is pressed against the inner wall of the outer sleeve 3 by the elastic force of the second spring 53, so that when the outer sleeve 3 is impacted by an external force, it is buffered by the second spring 53. Compared with the first embodiment, the ball 524 can reduce the wear on the surface wall of the elastic head 52 or the inner wall of the outer sleeve 3 when the outer sleeve 3 rotates relative to the inner sleeve 2.

[0041] Specifically, a leather-surface sealing sleeve 6 is sleeved on the outer end cable 7 of each annular plate 41, one end of the leather-surface sealing sleeve 6 is connected to the corresponding annular plate 41, and the other end of the leather-surface sealing sleeve 6 is adhered to the cable 7 by means of insulating tape. The leather-surface sealing sleeve 6 has a certain sealing property to prevent rainwater or dust from entering the outer sleeve 3 and affecting the service life of the first spring 42 or the second spring 53; it should be noted that when the outer end of the leather-surface sealing sleeve 6 is adhered to the cable 7 by means of insulating tape, a certain displacement buffer margin should be given to the leather-surface sealing sleeve 6 (that is, the leather-surface sealing sleeve 6 is in a loose state after installation, rather than a tight state), to prevent the leather-surface sealing sleeve 6 from being pulled when the outer sleeve 3 vibrates.

[0042] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A high-voltage cable shock-absorbing cable joint, comprising a connecting component for connecting two cables together, and an insulating waterproof layer is coated on the outside of the connecting component to form a joint portion (1) of the two cables; It is characterized in that Also includes: An inner sleeve (2) fixedly sleeved on the joint portion (1); An outer sleeve (3) is sleeved on the outer side of the inner sleeve (2); A first elastic component (4) elastically acts on the outer sleeve (3) along the axial direction of the inner sleeve (2); The second elastic components (5) are configured in a plurality of groups and are evenly distributed around the outer peripheral wall of the inner sleeve (2). Each group of the second elastic components (5) elastically contacts the inner wall of the outer sleeve (3).

2. A high voltage cable shock absorbing cable connector according to claim 1, characterized in that: The first elastic component (4) comprises two annular plates (41) and two first springs (42), the two first springs (42) being sleeved on the joint portion (1) and respectively located at the two ends of the inner sleeve (2); the two annular plates (41) are respectively coaxially mounted on the two ends of the outer sleeve (3), and each first spring (42) elastically abuts against the inner end of the corresponding annular plate (41).

3. A high voltage cable shock absorbing cable joint according to claim 2, characterized in that: A gap is left between each annular plate (41) and the outer wall of the joint portion (1).

4. A high voltage cable shock absorbing cable joint according to claim 1 or 3, characterized in that: Each group of second elastic components (5) comprises a guide column (51) and an elastic head (52); the elastic head (52) is provided with a sliding hole (521) that is slidably matched with the guide column (51); and a second spring (53) is installed in the sliding hole (521) to realize an elastic connection between the elastic head (52) and the guide column (51).

5. A high voltage cable shock absorbing cable joint according to claim 4, characterized in that: A circular baffle (511) is coaxially disposed at the outer end of the guide column (51), the diameter of the circular baffle (511) being larger than the diameter of the guide column (51), the circular baffle (511) being located in a corresponding sliding hole (521), an annular limiting block (522) being disposed at the open end of the sliding hole (521), the inner diameter of the limiting block (522) being adapted to the diameter of the guide column (51).

6. A high voltage cable shock absorbing cable connector according to claim 5, characterized in that: The outer end of the elastic head (52) is arranged as a rounded surface.

7. A high voltage cable shock absorbing cable connector according to claim 5, characterized in that: A hemispherical groove (523) is provided at the outer end of the elastic head (52), and a ball (524) is embedded in the hemispherical groove (523).

8. A high voltage cable shock absorbing cable connector according to claim 2, characterized in that: A leather-surface sealing sleeve (6) is sleeved on the outer cable end of each annular plate (41), one end of the leather-surface sealing sleeve (6) is connected to the corresponding annular plate (41), and the other end of the leather-surface sealing sleeve (6) is adhered to the cable by means of an insulating tape.

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