Non-separable cold shrinkable cable accessory

Abstract

This utility model relates to the field of cable accessories and discloses a cold-shrink cable accessory that is not easily separated. It includes a sleeve, with a support member inserted into the inner wall of the sleeve. An insulating sleeve is fixedly connected to the top of the sleeve, and an insertion hole is provided on the inner wall of the insulating sleeve. An adjustment component is provided on the outer wall of the insulating sleeve, and a detachable skirt is mounted on the outer wall of the insulating sleeve. A pin is elastically connected to the inner wall of the skirt via a compression spring, and a slider is slidably connected to the inner wall of the skirt. A plug is fixedly connected to the outer wall of the rear end of the slider. In this utility model, the pin and multiple insertion holes allow the skirt to be quickly locked and slid to a target position to adjust the creepage distance according to actual working conditions. This ensures the long-term stability of the skirt position and that the creepage distance always meets insulation requirements. Furthermore, when a single skirt is damaged, it can be quickly removed and replaced with a new skirt using a limiting mechanism.

Description

Technical Field

[0001] This utility model relates to the field of cable accessories, and more particularly to cold-shrink cable accessories that are not easily separated. Background Technology

[0002] As a core component for cable connection and insulation protection in power systems, cold-shrink cable accessories are widely used in critical nodes such as terminal heads and intermediate joints of high and low voltage cables. With the pre-expansion characteristics of elastic materials, they can be tightly attached to the cable surface by their own shrinkage force after the support is removed, and installation can be completed without additional heating equipment. They have significant application advantages in complex working conditions such as outdoor, underground, and tunnels, and are a key guarantee for ensuring the insulation performance of cables and preventing moisture intrusion and electric field distortion.

[0003] However, existing cold-shrink cable accessories still have shortcomings. For example, the sheds, as a key structure for improving the external insulation performance of cold-shrink accessories, cannot flexibly adjust the shed spacing to change the creepage distance according to the installation scenario, resulting in poor adaptability. Furthermore, when a single shed is damaged, it is not possible to quickly replace it with a new one, which undoubtedly increases costs and reduces installation efficiency. Therefore, a cold-shrink cable accessory that is not easily separable is proposed to solve the above problems. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a cold-shrink cable accessory that is not easy to separate, aiming to improve the problem that cable accessories in the prior art cannot flexibly adjust the skirt spacing.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a cold-shrinkable cable accessory that is not easily separated, comprising a sleeve, a support member inserted into the inner wall of the sleeve, an insulating sleeve fixedly connected to the top end of the sleeve, an insertion hole opened in the inner wall of the insulating sleeve, an adjustment component provided on the outer wall of the insulating sleeve, a detachable skirt installed on the outer wall of the insulating sleeve, a pin elastically connected to the inner wall of the skirt by a compression spring, a slider slidably connected to the inner wall of the skirt, a plug fixedly connected to the outer wall of the rear end of the slider, and a limit mechanism provided on the upper surface of the skirt; The limiting mechanism includes an installation cylinder, which is fixedly connected to the upper surface of the umbrella skirt. The bottom inner wall of the installation cylinder is elastically connected to a pull bolt by a return spring.

[0006] As a further description of the above technical solution: the adjustment component includes a fixing block, which is fixedly connected to the outer wall of the insulating sleeve. The inner wall of the fixing block is hinged with a clamp, and the inner wall of the clamp is threaded with a fixing bolt.

[0007] As a further description of the above technical solution: the pin is inserted into the inner wall of the socket, and the socket is configured as multiple groups and distributed in a vertical linear array.

[0008] As a further description of the above technical solution: the pin passes through and is slidably connected to the inner wall of the umbrella skirt.

[0009] As a further description of the above technical solution: the inner wall of the umbrella skirt is fixedly connected to one end of the compression spring, and the other end of the compression spring is fixedly connected to the left side wall of the pin.

[0010] As a further description of the above technical solution: the insert block is slidably connected to the inner wall of the umbrella skirt, the pull bolt is slidably connected to the inner wall of the umbrella skirt, and the pull bolt is inserted into the inner wall of the insert block.

[0011] As a further description of the above technical solution: the inner wall of the bottom end of the mounting cylinder is fixedly connected to one end of the return spring, and the other end of the return spring is fixedly connected to the inner side wall of the pull bolt.

[0012] As a further description of the above technical solution: the inner wall of the clamp is in contact with the outer wall of the insulating sleeve, and the clamp is set in two sets and symmetrically distributed with the fixing block as the center.

[0013] This utility model has the following beneficial effects: 1. In this utility model, the umbrella skirt can be quickly locked by the cooperation of the pin and multiple sets of sockets, and the creepage distance can be adjusted by sliding to the target position according to the actual working conditions. This ensures that the position of the umbrella skirt is stable for a long time and that the creepage distance always meets the insulation requirements. At the same time, when a single umbrella skirt is damaged, the umbrella skirt can be quickly removed and replaced with a new umbrella skirt by the limiting mechanism.

[0014] 2. In this utility model, the opening and closing angle of the clamp can be finely adjusted to ensure full fit with the outer wall of the insulating sleeve. Then, the clamping force can be provided by tightening the fixing bolts to firmly fix the insulating sleeve and the internal cable, preventing the internal cable and cable accessories from separating due to temperature fluctuations. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of a cold-shrinkable cable accessory that is not easily separated according to the present invention. Figure 2 This is an exploded view of the sleeve and support components of a cold-shrink cable accessory that is not easily separated according to this utility model. Figure 3 This is a cross-sectional schematic diagram of the umbrella skirt of a cold-shrinkable cable accessory that is not easily separated according to this utility model. Figure 4 This is a schematic diagram showing the slider and plug of a cold-shrink cable accessory that is not easily separated according to this utility model; Figure 5This is a cross-sectional schematic diagram of the mounting cylinder for a cold-shrinkable cable accessory that is not easily separable, as proposed in this utility model. Figure 6 This is a schematic diagram showing the fixing block, clamp, and fixing bolts of a cold-shrink cable accessory that is not easily separated according to this utility model.

[0016] Legend: 1. Sleeve; 2. Support; 3. Insulating sleeve; 4. Umbrella skirt; 5. Insertion hole; 6. Pin; 7. Compression spring; 8. Slider; 9. Insertion block; 10. Mounting cylinder; 11. Pull bolt; 12. Return spring; 13. Fixing block; 14. Clamp; 15. Fixing bolt. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Reference Figures 1-3This utility model provides an embodiment of a non-separable cold-shrink cable accessory, including a sleeve 1. The sleeve 1 can rely on the contraction force of its own elastic material to tightly fit the outer wall of the cable, achieving initial wrapping of the cable. A support member 2 is inserted into the inner wall of the sleeve 1. The support member 2 can maintain the sleeve 1 in a pre-expanded state before installation. After installation, the support member 2 can be pulled out to make the sleeve 1 fit the cable. An insulating sleeve 3 is fixedly connected to the top of the sleeve 1. The space between the sleeve 1 and the insulating sleeve 3 is hollow. The insulating sleeve 3 undertakes the core function of external insulation protection of the cable, and at the same time provides an installation base for the umbrella skirt 4 and the clamp 14. The inner wall of the insulating sleeve 3 has a hole 5, which provides positioning points of different heights for the umbrella skirt 4, and at the same time cooperates with the pin 6 to provide a fixed base for the umbrella skirt 4. An adjustment component is provided on the outer wall of the insulating sleeve 3. The umbrella skirt 4 is detachably installed on the outer wall of the insulating sleeve 3. The umbrella skirt 4 serves as To increase the creepage distance of cable accessories and enhance external insulation, the inner wall provides installation space for the pin 6, plug 9, and pull bolt 11. The inner wall of the umbrella skirt 4 is elastically connected to the pin 6 by a compression spring 7. The pin 6 passes through and is slidably connected to the inner wall of the umbrella skirt 4. The top of the pin 6 is provided with a sliding button exposed outside the umbrella skirt 4 for sliding to control the pin 6. The pin 6 is inserted into the inner wall of the socket 5. The pin 6 is pushed by the elastic force of the compression spring 7 and can automatically insert into the aligned socket 5, thus positioning the umbrella skirt 4. The inner wall of the umbrella skirt 4 is slidably connected to the slider 8. The slider 8 can drive the plug 9 to move by sliding along the arc groove of the umbrella skirt 4. The outer wall of the rear end of the slider 8 is fixedly connected to the plug 9. The plug 9 is slidably connected to the inner wall of the umbrella skirt 4. The inner wall of the plug 9 has a circular groove, which can control the installation and removal of the umbrella skirt 4. The upper surface of the umbrella skirt 4 is provided with a limit mechanism.

[0019] The limiting mechanism includes a mounting cylinder 10, which provides a mounting point for the return spring 12. The mounting cylinder 10 is fixedly connected to the upper surface of the umbrella skirt 4. The inner wall of the top end of the mounting cylinder 10 is elastically connected to a pull bolt 11 through the return spring 12. The pull bolt 11 is inserted into the inner wall of the insert block 9. The pull bolt 11 can be inserted into the circular groove of the insert block 9 to fix the position of the insert block 9 and thus make the umbrella skirt 4 spliced ​​into a whole. The return spring 12 ensures that the pull bolt 11 and the insert block 9 are tightly connected.

[0020] Reference Figure 2 and Figure 6The adjustment assembly includes a fixing block 13, which serves as a fixed fulcrum for the clamp 14 and provides a rotating shaft for opening and closing adjustment of the clamp 14. The fixing block 13 is fixedly connected to the outer wall of the insulating sleeve 3. The clamp 14 is hinged to the inner wall of the fixing block 13. The inner wall of the clamp 14 is in contact with the outer wall of the insulating sleeve 3. The clamp 14 is set in two sets and symmetrically distributed with the fixing block 13 as the center. The clamp 14 can be adjusted by the hinge structure to fit insulating sleeves 3 or cables with different outer diameters. When tightened, the clamping force firmly fixes the insulating sleeve 3 and the internal cable. The inner wall of the clamp 14 is threaded through and connected to a fixing bolt 15. The fixing bolt 15 fixes the tightening of the clamp 14 to provide a continuous locking force.

[0021] Reference Figures 3-5 The insertion holes 5 are arranged in multiple groups in a vertical linear array. The inner wall of the umbrella skirt 4 is fixedly connected to one end of the compression spring 7, and the other end of the compression spring 7 is fixedly connected to the left side wall of the pin 6. When the pin 6 is pushed, the pin 6 squeezes the compression spring 7 and retracts into the umbrella skirt 4. When resetting, the compression spring 7 moves the pin 6 outward. The pull bolt 11 is slidably connected to the inner wall of the umbrella skirt 4. The bottom inner wall of the mounting cylinder 10 is fixedly connected to one end of the reset spring 12, and the other end of the reset spring 12 is fixedly connected to the inner side wall of the pull bolt 11. When the pull bolt 11 is pulled, the reset spring 12 is compressed. When resetting, the elasticity of the reset spring 12 moves the pull bolt 11 downward.

[0022] Working principle: When installing cable accessories, first pass the cable through sleeve 1 and insulating sleeve 3. At this time, support 2 keeps sleeve 1 in a pre-expanded state. After support 2 is pulled out, sleeve 1 relies on the contraction force of its own elastic material to quickly fit the outer wall of the cable, forming a wrapping and connection of the cable.

[0023] When it is necessary to adjust the spacing between the umbrella skirts 4 to improve insulation performance, first push the sliding button of the pin 6. The pin 6 compresses the compression spring 7 and retracts into the inner wall of the umbrella skirt 4, separating the pin 6 from the socket 5. At this time, the umbrella skirt 4 can slide up and down along the outer wall of the insulating sleeve 3. When the umbrella skirt 4 reaches the target position, the pin 6 aligns with the corresponding socket 5. Stop pushing the sliding button of the pin 6, and the compression spring 7 releases its elasticity, automatically pushing the pin 6 into the socket 5, thus completing the positioning of the umbrella skirt 4 and achieving the purpose of adjusting its position. When the umbrella skirt 4 needs to be replaced due to aging or damage, first pull the pull bolt 11 upwards. The pull bolt 11 overcomes the elastic force of the return spring 12 and retracts into the installation cylinder 10. At this time, the pull bolt 11 disengages from the circular groove of the insert block 9 and is no longer fixed to the insert block 9. Then, slide the slider 8 clockwise to make the insert block 9 retract into the arc groove of the umbrella skirt 4. At this time, the umbrella skirt 4 is no longer a single piece and can be separated, so the umbrella skirt 4 can be quickly disassembled. The steps for installing a new umbrella skirt 4 are the reverse of the steps for disassembling the umbrella skirt 4. You can operate in reverse order of the above steps.

[0024] After the cable accessories are installed, the construction personnel can fine-tune the hinge angle of the clamp 14 so that the inner wall of the clamp 14 is completely in contact with the outer wall of the insulating sleeve 3. After the clamp 14 is in contact, tighten the fixing bolt 15 that passes through the clamp 14. The fixing bolt 15 causes the two sets of clamps 14 to tighten towards the center, generating clamping force to firmly fix the insulating sleeve 3 to the internal cable and prevent the insulating sleeve 3 from separating from the cable.

[0025] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cold-shrink cable accessory that is not easily separated, comprising a sleeve (1), characterized in that: A support member (2) is inserted into the inner wall of the sleeve (1). An insulating sleeve (3) is fixedly connected to the top of the sleeve (1). An insertion hole (5) is opened on the inner wall of the insulating sleeve (3). An adjustment component is provided on the outer wall of the insulating sleeve (3). A canopy skirt (4) is detachably installed on the outer wall of the insulating sleeve (3). A pin (6) is elastically connected to the inner wall of the canopy skirt (4) through a compression spring (7). A slider (8) is slidably connected to the inner wall of the canopy skirt (4). A plug (9) is fixedly connected to the outer wall of the rear end of the slider (8). A limit mechanism is provided on the upper surface of the canopy skirt (4). The limiting mechanism includes an installation cylinder (10), which is fixedly connected to the upper surface of the umbrella skirt (4). The bottom inner wall of the installation cylinder (10) is elastically connected to a pull bolt (11) by a return spring (12).

2. The non-separable cold-shrink cable accessory according to claim 1, characterized in that: The adjustment assembly includes a fixing block (13), which is fixedly connected to the outer wall of the insulating sleeve (3). The inner wall of the fixing block (13) is hinged with a clamp (14), and the inner wall of the clamp (14) is threaded with a fixing bolt (15).

3. The non-separable cold-shrink cable accessory according to claim 1, characterized in that: The pin (6) is inserted into the inner wall of the socket (5), and the socket (5) is configured as multiple groups and distributed in a vertical linear array.

4. The non-separable cold-shrink cable accessory according to claim 1, characterized in that: The pin (6) passes through and is slidably connected to the inner wall of the umbrella skirt (4).

5. The non-separable cold-shrink cable accessory according to claim 1, characterized in that: The inner wall of the umbrella skirt (4) is fixedly connected to one end of the compression spring (7), and the other end of the compression spring (7) is fixedly connected to the left side wall of the pin (6).

6. The non-separable cold-shrink cable accessory according to claim 1, characterized in that: The insert (9) is slidably connected to the inner wall of the umbrella skirt (4), the bolt (11) is slidably connected to the inner wall of the umbrella skirt (4), and the bolt (11) is inserted into the inner wall of the insert (9).

7. The non-separable cold-shrink cable accessory according to claim 1, characterized in that: The bottom inner wall of the mounting cylinder (10) is fixedly connected to one end of the return spring (12), and the other end of the return spring (12) is fixedly connected to the inner side wall of the pull bolt (11).

8. The non-separable cold-shrink cable accessory according to claim 2, characterized in that: The inner wall of the clamp (14) is in contact with the outer wall of the insulating sleeve (3), and the clamp (14) is set in two sets and symmetrically distributed with the fixing block (13) as the center.

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