Cable joint waterproof sealing device of ring main unit

Abstract

The utility model relates to the technical field of power equipment protection, in particular to a waterproof sealing device for a cable joint of a ring main unit, which comprises an elastic sealing body which is of a cylindrical structure, is provided with at least two annular bulges on the inner wall and is used for wrapping a cable outer sheath; the conical pressing ring is sleeved outside the elastic sealing body, and the inner conical surface of the conical pressing ring is matched with the outer conical surface of the elastic sealing body; and the threaded locking sleeve is in threaded connection with the conical pressing ring and is used for driving the conical pressing ring to move axially. According to the utility model, the defects in the prior art are overcome, the annular bulge on the elastic sealing body and the cable form a labyrinth seal to block the longitudinal permeation of water vapor, the thread drives the conical pressing ring to realize radial self-adaptive shrinkage and compensate the size error of the cable, and the drainage channel actively leads out seepage water to avoid accumulated water corrosion; and the buckle type detachable end cover is combined with the threaded locking sleeve, so that the cover can be opened for maintenance without a special tool.

Description

Technical Field

[0001] This utility model relates to the field of power equipment protection technology, specifically a waterproof sealing device for cable joints of a ring main unit. Background Technology

[0002] During the use of ring main units, the cable joint is a critical part and also a weak link that is prone to failure. Since ring main units are usually installed outdoors or in relatively humid environments, the cable joint is easily affected by rainwater erosion and humid air. Once water enters or becomes damp at the cable joint, it may cause safety accidents such as short circuits and leakage, seriously affecting the normal operation of the ring main unit, and may even cause damage to personnel and equipment.

[0003] Existing waterproof sealing devices for cable joints suffer from drawbacks such as the rubber rings used for sealing being prone to aging and cracking, short sealing life, reliance on manual installation, uneven sealing pressure, and inability to drain water after leakage from the cable joint, thus exacerbating the risk of corrosion.

[0004] To address the problems existing in the above-mentioned technologies, a waterproof sealing device for cable joints of ring main units is proposed. Utility Model Content

[0005] In view of the shortcomings of the prior art, this utility model provides a waterproof sealing device for cable joints of ring main units, which overcomes the shortcomings of the prior art and solves the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a waterproof sealing device for cable joints of a ring main unit, comprising:

[0007] The elastic sealing body has a cylindrical structure and at least two annular protrusions on its inner wall for wrapping the outer sheath of the cable.

[0008] A conical compression ring is fitted onto the outside of the elastic sealing body, with its inner conical surface mating with the outer conical surface of the elastic sealing body.

[0009] A threaded locking sleeve, connected to a tapered clamping ring via threads, is used to drive the tapered clamping ring to move axially.

[0010] A waterproof flange is fixed to the cable inlet of the ring main unit. A drainage channel is provided on the outdoor side of the flange, and a snap-fit ​​interface is provided on the outside of the waterproof flange.

[0011] The removable end cap connects to the waterproof flange via a snap-fit ​​mechanism and has a through hole in the center for cables to pass through.

[0012] Fix the waterproof flange to the cable inlet of the ring main unit. After the cable passes through the detachable end cover and the elastic sealing body, make a joint. Slide the elastic sealing body onto the cable and push it into the inner cavity of the waterproof flange. Install the conical compression ring and the threaded locking sleeve. Tighten the locking sleeve to make the elastic sealing body radially contract and hug the cable. Fasten the detachable end cover to complete the seal.

[0013] As a preferred embodiment of this utility model, the elastic sealing body is made of silicone rubber, and its outer surface is a conical surface that matches the inner conical surface of the conical compression ring.

[0014] The tapered structure design between the tapered compression ring and the elastic sealing body allows the elastic sealing body to contract radially and form a seal with the cable.

[0015] As a preferred embodiment of this utility model, the elastic sealing body is embedded with a spiral stainless steel spring ring, which extends along the axial direction of the sealing body and is completely enclosed in the silicone rubber material.

[0016] Spiral stainless steel spring rings enhance the durability of the seal between the elastic seal and the cable. The spring rings provide continuous radial rebound force to compensate for the long-term compression deformation of silicone rubber.

[0017] As a preferred technical solution of this utility model, the end of the drainage channel is connected to a water guide pipe, which extends to the bottom drainage area of ​​the ring network cabinet.

[0018] Small amounts of water that seep in can be drained through the drainage channels to prevent water accumulation and corrosion.

[0019] As a preferred technical solution of this utility model, the surface of the conical clamping ring is coated with a polytetrafluoroethylene anti-corrosion coating.

[0020] Polytetrafluoroethylene coating blocks acid rain / salt spray corrosion, extending the lifespan of metal parts by several times.

[0021] As a preferred embodiment of this utility model, the bottom of the detachable end cap is fixedly equipped with a claw that engages with the card interface.

[0022] The gripper enables quick assembly and disassembly, while also solving the problem of uneven pressure during manual installation.

[0023] As a preferred technical solution of this utility model, the inner edge of the detachable end cap is provided with an annular sealing gasket for pressing the elastic sealing body.

[0024] As a preferred technical solution of this utility model, the outer surface of the threaded locking sleeve is provided with anti-slip texture, which is a cross-shaped mesh protrusion structure.

[0025] The cross-shaped mesh protrusions increase the friction for hand operation.

[0026] Compared with the prior art, the beneficial effects of this utility model are:

[0027] 1. The annular protrusions on the elastic sealing body form a labyrinth seal with the cable to block longitudinal water vapor penetration. The threaded conical compression ring achieves radial adaptive contraction to compensate for cable size errors. The drainage channel actively discharges seepage water to avoid water accumulation and corrosion.

[0028] 2. The snap-on detachable end cap and threaded locking sleeve are combined, allowing for easy opening and maintenance without special tools. Attached Figure Description

[0029] Figure 1 This is a three-dimensional schematic diagram of the present invention and its assembly with a cable;

[0030] Figure 2 This is a front view schematic diagram of the present invention and cable assembly;

[0031] Figure 3 For the present utility model Figure 2 Schematic diagram of the cross section at point AA;

[0032] Figure 4 For the present utility model Figure 3 A magnified view of a portion of point A in the middle.

[0033] In the diagram: 1. Waterproof flange; 101. Clip interface; 102. Drainage channel; 2. Removable end cap; 201. Claw; 3. Elastic sealing body; 301. Annular protrusion; 4. Conical clamping ring; 5. Threaded locking sleeve. Detailed Implementation

[0034] 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.

[0035] Please see Figure 1-4 A waterproof sealing device for cable joints of a ring main unit, comprising:

[0036] The elastic sealing body 3 has a cylindrical structure and at least two annular protrusions 301 on its inner wall for wrapping the outer sheath of the cable.

[0037] A conical compression ring 4 is sleeved on the outside of the elastic sealing body 3, and its inner conical surface mates with the outer conical surface of the elastic sealing body 3.

[0038] The threaded locking sleeve 5 is connected to the tapered clamping ring 4 by a thread and is used to drive the tapered clamping ring 4 to move axially.

[0039] Waterproof flange 1 is fixed to the cable inlet of the ring main unit. A drainage channel 102 is provided on the outdoor side of the waterproof flange 1. A snap-fit ​​interface 101 is provided on the outer side of the waterproof flange 1.

[0040] The detachable end cap 2 is connected to the waterproof flange 1 via a snap-fit ​​structure, and has a through hole in the center for the cable to pass through;

[0041] Fix the waterproof flange 1 to the cable inlet of the ring main unit. After the cable passes through the detachable end cover 2 and the elastic sealing body 3, make a joint. Slide the elastic sealing body 3 onto the cable and push it into the inner cavity of the waterproof flange 1. Install the conical compression ring 4 and the threaded locking sleeve 5. Tighten the locking sleeve to make the elastic sealing body 3 radially contract and hug the cable. Fasten the detachable end cover 2 to complete the seal.

[0042] Specifically, the elastic sealing body 3 is made of silicone rubber, and its outer surface is a conical surface that matches the inner conical surface of the conical compression ring 4. Through the conical structure design between the conical compression ring 4 and the elastic sealing body 3, the elastic sealing body 3 can be radially contracted to form a seal with the cable.

[0043] Specifically, the elastic seal 3 has a spiral stainless steel spring ring embedded inside. The spring ring extends along the axial direction of the seal and is completely enclosed in the silicone rubber material. The spiral stainless steel spring ring can improve the sealing durability between the elastic seal 3 and the cable. The spring ring provides continuous radial rebound force to compensate for the long-term compression deformation of the silicone rubber.

[0044] Specifically, a water guide pipe is connected to the end of the drainage channel 102, which extends to the drainage area at the bottom of the ring main unit. A small amount of water that seeps in can be discharged through the drainage channel 102 to avoid water accumulation and corrosion.

[0045] Specifically, the surface of the conical clamping ring 4 is coated with a polytetrafluoroethylene (PTFE) anti-corrosion coating. The PTFE coating blocks acid rain / salt spray corrosion, increasing the lifespan of metal parts by 3 times.

[0046] Specifically, the bottom of the detachable end cap 2 is fixedly equipped with a claw 201 that engages with the card interface 101. The claw 201 enables quick installation and removal, and also solves the problem of uneven pressure during manual installation.

[0047] Specifically, the inner edge of the detachable end cap 2 is provided with an annular sealing gasket for pressing the end face of the elastic sealing body 3. The outer surface of the threaded locking sleeve 5 is provided with anti-slip texture, which is a cross-shaped mesh protrusion structure. The cross-shaped mesh protrusion increases the friction of human hand operation.

[0048] Working principle: Fix the waterproof flange 1 to the cable inlet of the ring main unit. After the cable passes through the detachable end cover 2 and the elastic sealing body 3, make a joint. Slide the elastic sealing body 3 onto the cable and push it into the inner cavity of the waterproof flange 1. Install the conical compression ring 4 and the threaded locking sleeve 5. Tighten the locking sleeve to make the elastic sealing body 3 radially contract and hug the cable. Fasten the detachable end cover 2 to complete the seal.

[0049] Finally, it should be noted that in the description of this utility model, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0050] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0051] The above description is merely 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 waterproof sealing device for cable joints of a ring main unit, characterized in that, include: The elastic sealing body (3) has a cylindrical structure and at least two annular protrusions (301) on its inner wall for wrapping the outer sheath of the cable. A conical compression ring (4) is fitted on the outside of the elastic sealing body (3), and its inner conical surface mates with the outer conical surface of the elastic sealing body (3); The threaded locking sleeve (5) is connected to the tapered clamping ring (4) by a thread and is used to drive the tapered clamping ring (4) to move axially. A waterproof flange (1) is fixed to the cable inlet of the ring main unit. A drainage channel (102) is provided on the side facing the outdoors. A snap-fit ​​interface (101) is provided on the outside of the waterproof flange (1). The removable end cap (2) is connected to the waterproof flange (1) by a snap-fit ​​structure and has a through hole in the center for the cable to pass through.

2. The waterproof sealing device for cable joints of a ring main unit according to claim 1, characterized in that: The elastic sealing body (3) is made of silicone rubber, and its outer surface is a conical surface that matches the inner conical surface of the conical compression ring (4).

3. The waterproof sealing device for cable joints of a ring main unit according to claim 1, characterized in that: The elastic sealing body (3) has a spiral stainless steel spring ring embedded inside, which extends along the axial direction of the sealing body and is completely covered by the silicone rubber material.

4. The waterproof sealing device for cable joints of a ring main unit according to claim 1, characterized in that: The drainage channel (102) is connected to a water guide pipe at its end, which extends to the drainage area at the bottom of the ring main unit.

5. A waterproof sealing device for cable joints of a ring main unit according to claim 1, characterized in that: The surface of the conical clamping ring (4) is coated with a polytetrafluoroethylene anti-corrosion coating.

6. The waterproof sealing device for cable joints of a ring main unit according to claim 1, characterized in that: The bottom of the detachable end cap (2) is fixedly equipped with a claw (201) that engages with the card interface (101).

7. A waterproof sealing device for cable joints of a ring main unit according to claim 1, characterized in that: The inner edge of the detachable end cap (2) is provided with an annular sealing gasket for pressing the end face of the elastic sealing body (3).

8. The waterproof sealing device for cable joints of a ring main unit according to claim 1, characterized in that: The outer surface of the threaded locking sleeve (5) is provided with anti-slip texture, which is a cross-shaped mesh protrusion structure.

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