Cable accessory and cable assembly

Abstract

The utility model discloses a cable accessory and a cable assembly, comprising a hollow insulating tube and a stress cone arranged in the insulating tube, the outer surface of the insulating tube is fixedly provided with a plurality of umbrella skirts, the inner wall of the insulating tube is provided with a plurality of grooves, each groove is internally provided with a fastening assembly, and the stress cone is provided with a plurality of clamping grooves. A guide assembly is arranged at one end, close to the stress cone, of the insulating tube, the guide assembly comprises a guide sleeve detachably installed in the insulating tube, the outer diameter of the guide sleeve is larger than the inner diameter of the stress cone, and the fastening assembly comprises a plurality of elastic pieces fixedly installed in the groove. A clamping plate is fixedly installed at the end, away from the groove in the same side, of each elastic piece. According to the utility model, the clamping plates can be utilized to extrude the cable to fix the cable under the action of the elastic piece, so that the connection tightness of the cable and the insulation tube is improved, the connection tightness of the insulation tube and the cable is further improved, and the diameter of the stress cone can be expanded to facilitate the subsequent insertion of the cable.

Description

Technical Field

[0001] The utility model relates to the technical field related to cable accessories, in particular to cable accessories and cable components. Background Art

[0002] Cable accessories are products that connect cables to power transmission and distribution lines and related distribution devices. They generally refer to the intermediate connections and terminal connections of various cables in cable lines. Together with the cables, they constitute a power transmission network.

[0003] The existing cold shrink cable accessories are supported by the stress of the internal support tube before installation and are under high tension. Since the cold shrink cable accessories are pre-expanded, the support tube may fall off or the silicone material may not shrink properly due to fatigue when the support tube is stored for a long time. Therefore, it cannot be guaranteed that there is sufficient elastic compression force after installation on the cable. The elastic stress will gradually relax with the increase of time. In this case, it is difficult to ensure the shrinkage stress of the cold shrink cable accessories when connecting the cable, which makes it easy for the cable accessories to be not tightly connected when connecting the cable. In addition, the existing cable accessories often need to be used in conjunction with the stress cone when in use. Because the stress cone requires a certain holding force on the cable, the inner diameter of the stress cone needs to be much smaller than the outer diameter of the cable. The existing installation method is manual installation, which consumes a lot of physical strength, and it is not easy to install the stress cone on the cable, and the operation is relatively laborious. Utility Model Content

[0004] In order to solve the defects in the prior art, the utility model provides a cable accessory and a cable assembly.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] The utility model cable accessory comprises a hollow insulating tube and a stress cone arranged in the insulating tube, wherein a plurality of sheds are fixedly mounted on the outer surface of the insulating tube, a plurality of grooves are opened on the inner wall of the insulating tube, a fastening assembly is arranged in each of the grooves, a guide assembly is arranged at one end of the insulating tube close to the stress cone, the guide assembly comprises a guide sleeve which is detachably mounted in the insulating tube, and the outer diameter of the guide sleeve is larger than the inner diameter of the stress cone.

[0007] As a preferred technical solution of the utility model, the fastening assembly includes a plurality of elastic members fixedly installed in the grooves, and a clamping plate is fixedly installed at one end of each elastic member away from the groove on the same side.

[0008] As a preferred technical solution of the utility model, the shape of the clamping plate is arc-shaped, and a plurality of elastic members are evenly distributed in an array along the circumference on the inner wall of the groove on the same side.

[0009] As a preferred technical solution of the utility model, the guide sleeve is composed of two semicircular installation sleeves, one end of the installation sleeve is fixedly installed with a limit ring, and the two limit rings are symmetrically arranged and detachably connected by bolts.

[0010] As a preferred technical solution of the utility model, one end of the installation sleeve away from the limiting ring has an inclined surface.

[0011] As a preferred technical solution of the utility model, insulating grease is coated on the contact surface between the guide sleeve and the insulating tube.

[0012] The utility model further provides a cable assembly, comprising a cable and a cable accessory as described in any one of the above, wherein the cable accessory is arranged at a terminal of the cable, and a support tube is arranged inside the cable accessory.

[0013] The beneficial effects of the utility model are:

[0014] 1. This type of cable accessories and cable assembly, by setting a fastening component and a support tube, the cable is inserted into the insulating tube through the stress cone and contacts with the support tube, and then the support tube is gradually taken out from the insulation while the cable is gradually inserted into the insulating tube, the support tube is taken out from the insulating tube, the insulating tube shrinks, and the cable is sealed, and the clamping plate squeezes the cable to fix the cable under the action of the elastic member, thereby improving the tightness of the connection between the cable and the insulating tube, and further improving the tightness of the connection between the insulating tube and the cable.

[0015] 2. This type of cable accessories and cable components, by setting a guide component, fix the two limit rings together with bolts to splice and assemble the two installation sleeves together to form a guide sleeve, and then insert the guide sleeve into the stress cone in the insulating tube, expand the diameter of the stress cone to facilitate the subsequent insertion of the cable. After the cable is installed, pull the limit ring to pull the guide sleeve out of the insulating tube, and then fix the two installation sleeves through bolt contact, that is, the guide sleeve can be removed from the insulating tube. The operation is simple, easy to use, time-saving and labor-saving, easy to install and disassemble, and can be reused, with strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 It is a schematic diagram of the overall structure of the cable accessory and the cable assembly of the utility model;

[0018] Figure 2 It is a schematic diagram of the cross-sectional structure of the insulating tube of the cable accessory and the cable assembly of the utility model;

[0019] Figure 3 It is a schematic diagram of the fastening assembly structure of the cable accessory and the cable assembly of the utility model;

[0020] Figure 4 The utility model is a schematic diagram of the guide component structure of the cable accessory and the cable component.

[0021] In the figure: 1. insulating tube; 2. stress cone; 3. umbrella skirt; 4. groove; 5. fastening assembly; 501. elastic member; 502. clamping plate; 6. guide assembly; 601. guide sleeve; 602. installation sleeve; 603. limit ring; 7. cable; 8. support tube. DETAILED DESCRIPTION

[0022] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0023] Example: Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the cable accessory of the utility model comprises a hollow insulating tube 1 and a stress cone 2 arranged in the insulating tube 1, a plurality of sheds 3 are fixedly installed on the outer surface of the insulating tube 1, a plurality of grooves 4 are opened on the inner wall of the insulating tube 1, a fastening assembly 5 is arranged in each groove 4, a guide assembly 6 is arranged at one end of the insulating tube 1 close to the stress cone 2, the guide assembly 6 comprises a guide sleeve 601 detachably installed in the insulating tube 1, the outer diameter of the guide sleeve 601 is larger than the inner diameter of the stress cone 2, and the fastening assembly 5 can be provided to improve the tightness of the connection between the cable 7 and the insulating tube 1, and further improve the tightness of the connection between the insulating tube 1 and the cable 7; by providing the guide assembly 6, the stress cone 2 is expanded to facilitate the subsequent installation of the cable 7, and the operation is simple, easy to use, and time-saving and labor-saving.

[0024] Among them, the fastening assembly 5 includes a plurality of elastic members 501 fixedly installed in the groove 4, and a clamping plate 502 is fixedly installed at one end of each elastic member 501 away from the groove 4 on the same side. When the cable 7 is inserted into the insulating tube 1, the clamping plate 502 can squeeze the cable 7 to fix the cable 7 under the action of the elasticity of the elastic member 501 itself, thereby improving the tightness of the connection between the cable 7 and the insulating tube 1, and further improving the tightness of the connection between the insulating tube 1 and the cable 7.

[0025] The clamping plate 502 is arc-shaped, and a plurality of elastic members 501 are evenly distributed in an array along the circumference on the inner wall of the groove 4 on the same side, which can increase the contact area between the clamping plate 502 and the cable 7 and ensure the fixing effect of the clamping plate 502 on the cable 7.

[0026] Among them, the guide sleeve 601 is composed of two semicircular installation sleeves 602, and a limit ring 603 is fixedly installed at one end of the installation sleeve 602. The two limit rings 603 are symmetrically arranged and detachably connected by bolts. The two limit rings 603 are fixed together by bolts, so that the two installation sleeves 602 are spliced ​​and assembled together to form the guide sleeve 601, and then the guide sleeve 601 is inserted into the stress cone 2 in the insulating tube 1, and the stress cone 2 is expanded to facilitate the subsequent insertion of the cable 7. After the cable 7 is installed, the limit ring 603 is pulled to pull the guide sleeve 601 out of the insulating tube 1, and then the two installation sleeves 602 are fixed by bolt contact, that is, the guide sleeve 601 can be removed from the insulating tube 1. The operation is simple, the use is convenient, time-saving and labor-saving, it is easy to install and disassemble, and it can be reused, and it is highly practical.

[0027] Among them, one end of the installation sleeve 602 away from the limiting ring 603 has an inclined surface, which facilitates the installation sleeve 602 to be inserted into the insulating tube 1.

[0028] The contact surface between the guide sleeve 601 and the insulating tube 1 is coated with insulating grease, which can reduce the friction force of the guide sleeve 601 during the process of inserting the guide sleeve 601 into the insulating tube 1 and pulling it out from the insulating tube 1.

[0029] The utility model also proposes a cable assembly, including a cable 7 and any one of the cable accessories as described above, the cable accessories are arranged at the terminal of the cable 7, a support tube 8 is arranged in the cable accessory, the cable 7 is inserted into the insulating tube 1 through the stress cone 2 and contacts with the support tube 8, then the support tube 8 is gradually taken out from the insulation while the cable 7 is gradually inserted into the insulating tube 1, the support tube 8 is taken out from the insulating tube 1, the insulating tube 1 shrinks, and the cable 7 is sealed, and the clamping plate 502 squeezes the cable 7 under the action of the elastic member 501 to fix the cable 7, thereby improving the tightness of the connection between the cable 7 and the insulating tube 1, and further improving the tightness of the connection between the insulating tube 1 and the cable 7.

[0030] During operation, the two limiting rings 603 are fixed together by bolts so that the two installation sleeves 602 are spliced ​​and assembled together to form a guide sleeve 601, and then the guide sleeve 601 is inserted into the stress cone 2 in the insulating tube 1 to expand the diameter of the stress cone 2 to facilitate the subsequent insertion of the cable 7. After the expansion is completed, the cable 7 is inserted into the insulating tube 1 through the stress cone 2 and contacts with the support tube 8, and then the support tube 8 is gradually taken out of the insulation while the cable 7 is gradually inserted into the insulating tube 1. The support tube 8 is taken out of the insulating tube 1, and the insulating tube 1 shrinks to seal the cable 7. The clamping plate 502 squeezes the cable 7 under the action of the elastic member 501 to fix the cable 7, thereby improving the tightness of the connection between the cable 7 and the insulating tube 1. Finally, the limiting ring 603 is pulled to pull the guide sleeve 601 out of the insulating tube 1, and then the two installation sleeves 602 are fixed by bolt contact, that is, the guide sleeve 601 can be removed from the insulating tube 1. The operation is simple and easy to use.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above 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 utility model shall be included in the protection scope of the utility model.

Claims

1. A cable accessory, comprising a hollow insulating tube (1) and a stress cone (2) arranged in the insulating tube (1), characterized in that: A plurality of sheds (3) are fixedly mounted on the outer surface of the insulating tube (1); a plurality of grooves (4) are formed on the inner wall of the insulating tube (1); a fastening assembly (5) is arranged in each of the grooves (4); a guide assembly (6) is arranged at one end of the insulating tube (1) close to the stress cone (2); the guide assembly (6) comprises a guide sleeve (601) detachably mounted in the insulating tube (1); the outer diameter of the guide sleeve (601) is larger than the inner diameter of the stress cone (2).

2. The cable accessory according to claim 1, characterized in that: The fastening assembly (5) comprises a plurality of elastic members (501) fixedly mounted in the grooves (4), and a clamping plate (502) is fixedly mounted on one end of each elastic member (501) away from the groove (4) on the same side.

3. The cable accessory according to claim 2, characterized in that: The clamping plate (502) is in an arc shape, and a plurality of the elastic members (501) are evenly distributed in an array along the circumference on the inner wall of the groove (4) on the same side.

4. The cable accessory according to claim 1, characterized in that: The guide sleeve (601) is composed of two semicircular mounting sleeves (602), one end of the mounting sleeve (602) is fixedly mounted with a limit ring (603), and the two limit rings (603) are symmetrically arranged and detachably connected via bolts.

5. The cable accessory according to claim 4, characterized in that: One end of the installation sleeve (602) away from the limiting ring (603) has an inclined surface.

6. The cable accessory according to claim 1, characterized in that: Insulating grease is coated on the contact surface between the guide sleeve (601) and the insulating tube (1).

7. A cable assembly, characterized in that: It comprises a cable (7) and a cable (7) accessory according to any one of claims 1 to 6, wherein the cable (7) accessory is arranged at a terminal of the cable (7), and a support tube (8) is arranged inside the cable (7) accessory.

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