Tail pipe sealing structure for high-pressure oil-filled sleeve terminal

Abstract

The utility model discloses a tail pipe sealing structure for a high-voltage oil-filled bushing terminal, which comprises a cable and an installation platform, the installation platform supports a base through a plurality of supporting insulators, the base is provided with an installation sleeve, a metal sleeve with internal threads is arranged below the installation sleeve, and the metal sleeve is provided with a plurality of external threads. A metal sheath of the cable is arranged in the mounting sleeve and the metal sleeve in a penetrating mode, a connecting section which extends outwards and is provided with external threads is arranged on the outer wall of the lower portion of the mounting sleeve, a waterproof belt layer is wound between the bottom of the mounting sleeve and the metal sheath, and the metal sleeve is connected with the connecting section in a threaded mode after clamping the waterproof belt layer. The air conditioner is simple in structure, good in sealing performance and capable of adapting to severe outdoor environments.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of oil filled bushing sealing, especially relates to a tail pipe sealing structure for high pressure oil filled bushing terminal. BACKGROUND

[0002] The sealing property of the outdoor oil filled bushing terminal is an important link influencing the stability of the cable work, and the sealing mode of the tail pipe of the oil filled bushing terminal is generally that the tape is wound and then sealed with a heat shrink tube, such as the 110kV oil filled outdoor cable terminal disclosed in Chinese patent CN206712441U, and the sealing structure of the cable tail pipe in the patent is just like this, the structure is simple, but since the oil filled bushing works outdoors, the environment is harsh, and the heat shrink tube and the tape are prone to aging after a long time, thereby affecting the sealing property and causing oil leakage. SUMMARY

[0003] The utility model aims at providing a tail pipe sealing structure for high pressure oil filled bushing terminal.

[0004] The utility model has the advantages of simple structure, good sealing property and adaptability to harsh outdoor environment.

[0005] To achieve the above-mentioned utility model purposes, the technical scheme of the utility model is as follows:

[0006] A tail pipe sealing structure for high pressure oil filled bushing terminal, comprising a cable and a mounting platform, the mounting platform supports a base through a plurality of support insulators, a mounting sleeve is arranged on the base, a metal sleeve with internal threads is further arranged below the mounting sleeve, a metal sheath of the cable is arranged in the mounting sleeve and the metal sleeve, an outwardly extending connecting section with external threads is arranged on the outer wall of the lower part of the mounting sleeve, a waterproof tape layer is wound between the bottom of the mounting sleeve and the metal sheath, and the metal sleeve is threadedly connected with the connecting section after clamping the waterproof tape layer.

[0007] Further, the outer wall of the metal sleeve and the connecting section is wrapped with a heat shrink tube after being connected.

[0008] Further, the top of the waterproof tape layer abuts against the bottom of the connecting section, and the bottom abuts against the bottom of the metal sleeve; the waterproof tape layer has a diameter that is large in the middle and small at both ends, and the diameter of the middle part is slightly larger than the inner diameter of the metal sheath.

[0009] Further, a layer of silicone grease is applied to the outer wall of the waterproof tape layer.

[0010] The utility model has the advantages of:

[0011] The waterproof tape layer is wound between the bottom of the mounting sleeve and the metal sheath of the cable to form a first heavy sealing structure; the connection of the metal sleeve and the mounting sleeve can reinforce and protect the waterproof tape layer and ensure the service life of the waterproof tape layer, and forms a second heavy sealing structure; finally, the entire sealing structure is protected by the heat shrink tube, so that the sealing structure is simple and reliable, and can adapt to harsh outdoor environments. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model.

[0013] Figure 2 It is Figure 1 It is an enlarged view of A part.

[0014] In the figure: 10 is a cable, 11 is a metal sheath, 20 is a mounting platform, 21 is a base, 22 is a mounting sleeve, 22.1 is a connecting section, 23 is a metal sleeve, 30 is a waterproof tape layer, and 40 is a heat shrink tube. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings.

[0016] A tail pipe sealing structure for high-voltage oil-filled sleeve terminal, comprising a cable 10 and a mounting platform 20, the mounting platform 20 supports a base 21 through a plurality of support insulators, a mounting sleeve 22 is arranged on the base 21, a metal sleeve 23 with internal threads is further arranged below the mounting sleeve 22, a metal sheath 11 of the cable 10 is arranged in the mounting sleeve 22 and the metal sleeve 23, an outwardly extending connecting section 22.1 with external threads is arranged on the outer wall of the lower part of the mounting sleeve 22, a waterproof tape layer 30 is wound between the bottom of the mounting sleeve 22 and the metal sheath 11, and the metal sleeve 23 is threadedly connected with the connecting section 22.1 after clamping the waterproof tape layer 30.

[0017] Further, the outer wall of the metal sleeve 23 is wrapped with a heat shrink tube 40 after being connected with the connecting section 22.1.

[0018] Further, the heat shrink tube 40 wraps the upper part of the connecting section 22.1 at the top and wraps the outer sheath of the cable 10 at the bottom, thereby wrapping the entire sealing structure.

[0019] Further, the top of the waterproof tape layer 30 abuts against the bottom of the connecting section 22.1, and the bottom abuts against the bottom of the metal sleeve 23; the waterproof tape layer 30 has a diameter that is large in the middle and small at both ends, the diameter of the middle part is slightly larger than the inner diameter of the metal sleeve 23, and when the metal sleeve 23 is tightened with the connecting section 22.1, the waterproof tape layer 30 can be extruded due to its elasticity, which helps to improve the sealing performance of the waterproof tape layer 30 after being extruded.

[0020] Further, the waterproof tape layer 30 outer wall is also coated with a layer of silicone grease.

[0021] Further, the silicone grease layer mainly plays a lubricating role, facilitating the tightening of the metal sleeve 23 and the connecting section 22.1.

[0022] The described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

Claims

1. A tail pipe sealing structure for a high-voltage oil-filled bushing terminal, comprising a cable (10) and a mounting platform (20), wherein the mounting platform (20) supports a base (21) through a plurality of supporting insulators, and a mounting sleeve (22) is provided on the base (21), characterized in that: A metal sleeve (23) with an internal thread is further provided below the installation sleeve (22); the metal sheath (11) of the cable (10) is inserted into the installation sleeve (22) and the metal sleeve (23); a connecting section (22.1) with an external thread extending outward is provided on the lower outer wall of the installation sleeve (22); a waterproof tape layer (30) is wound between the bottom of the installation sleeve (22) and the metal sheath (11); and the metal sleeve (23) is threadedly connected to the connecting section (22.1) after clamping the waterproof tape layer (30).

2. The tail pipe sealing structure for a high-pressure oil-filled casing terminal according to claim 1, characterized in that: After the metal sleeve (23) is connected to the connecting section (22.1), the outer wall is further wrapped with a heat shrink tube (40).

3. The tail pipe sealing structure for a high-pressure oil-filled casing terminal according to claim 1, characterized in that: The top of the waterproof tape layer (30) abuts against the bottom of the connecting section (22.1), and the bottom abuts against the bottom of the metal sleeve (23); the diameter of the waterproof tape layer (30) is larger in the middle and smaller at both ends, and the diameter of the middle part is slightly larger than the inner diameter of the metal sleeve (23).

4. The tail pipe sealing structure for a high-pressure oil-filled casing terminal according to claim 1, characterized in that: The outer wall of the waterproof tape layer (30) is also coated with a silicone grease layer.

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