A high voltage cable termination tail pipe structure

Abstract

The utility model relates to electric power engineering technical field especially a high -voltage cable terminal tail pipe structure is equipped with sealing structure between tail pipe and cable terminal sleeve, sealing structure includes sealing groove, sealing groove is processed in first flange and second flanewall, sealing groove inner wall is in close contact with labial shape sealing washer, labial shape sealing washer inner wall fixedly connected with O type sealing washer. This high -voltage cable terminal tail pipe structure cooperates through first flange, second flange and sealing structure, when cable normal operation has no vibration or displacement, O type sealing washer can bear all sealing pressure, when cable is rolled and vibrated by ground vehicle, labial shape sealing washer is limited axially by sealing groove, labial shape sealing washer occurs elastic deformation, and automatic adhesion sealing groove surface forms dynamic sealing barrier, to realize through O type sealing washer and labial shape sealing washer can play the role of double -sealed, reduces the situation of reducing sealing effect when cable vibration.

Description

Technical Field

[0001] This utility model relates to the field of power engineering technology, specifically to a high-voltage cable terminal tail tube structure. Background Technology

[0002] High-voltage cable terminal pipes are an important component of high-voltage cable termination heads. They are mainly used for the protection and sealing of the cable line ends. They mainly include vertical sections, angled sections, and arc transition sections. They can provide additional mechanical support for the cable ends, prevent cable damage caused by external pressure, tension, impact, or squeezing, and protect the structural integrity of the cable.

[0003] For example, a high-voltage cable terminal tailpipe structure with publication number "CN109802352A" features an angled section on the tailpipe, and the cable head is also angled. This significantly reduces the depth of the cable trench, optimizing the power distribution equipment site, reducing civil engineering work, shortening construction time, and facilitating operation, maintenance, and repair. However, in this structure, the insulating sleeve and tailpipe are connected by a flange and a sealing ring. Cable vibration (such as from vehicles running over it) can cause gaps on the flange surface, and the sealing ring can be squeezed out of the sealing groove due to uneven pressure on both sides, resulting in displacement and reduced sealing effectiveness. Utility Model Content

[0004] The purpose of this utility model is to solve the problem that cable vibration causes gaps on the flange surface, and the sealing ring is squeezed out of the sealing groove due to uneven pressure on both sides, resulting in displacement and reduced sealing effect. Therefore, a high-voltage cable terminal tail pipe structure is proposed.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A high-voltage cable terminal tail pipe structure is designed, including a tail pipe and a cable terminal sleeve. The cable terminal sleeve is provided above the tail pipe, and a sealing structure is provided between the tail pipe and the cable terminal sleeve. The sealing structure includes a sealing groove, which is machined on the inner wall of a first flange and a second flange. The inner wall of the sealing groove abuts against a lip seal ring, and an O-ring seal ring is fixedly connected to the inner wall of the lip seal ring.

[0006] Preferably, the inner wall of the O-ring seal is in contact with the cable.

[0007] Preferably, the outer wall of the cable is inserted into the cable terminal sleeve and the tail tube, respectively.

[0008] Preferably, the lower part of the cable terminal sleeve is fixedly connected to the second flange.

[0009] Preferably, the tailpipe is fixedly connected to the first flange.

[0010] Preferably, the first flange and the second flange are connected by bolts and nuts.

[0011] The beneficial effects of the high-voltage cable terminal tail pipe structure proposed in this utility model are as follows: through the cooperation of the first flange, the second flange and the sealing structure, when the cable is running normally without vibration or displacement, the O-ring can bear the entire sealing pressure. When the cable is subjected to vibration from ground vehicles, the lip seal is axially restricted by the sealing groove, and the lip seal undergoes elastic deformation, automatically fitting the surface of the sealing groove to form a dynamic sealing barrier. This achieves a dual sealing effect through the O-ring and the lip seal, reducing the situation where the sealing effect is reduced when the cable vibrates. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 A partial front sectional view; Figure 3 for Figure 2 A magnified view of part A in the diagram; Figure 4 for Figure 2 Top view.

[0013] In the diagram: 1. Tail pipe, 2. First flange, 3. Second flange, 4. Cable terminal sleeve, 5. Cable, 6. Sealing structure, 601. Sealing groove, 602. Lip seal, 603. O-ring. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings: See attached document Figure 1-4 In this embodiment, a high-voltage cable terminal tail pipe structure includes a tail pipe 1 and a cable terminal sleeve 4. The cable terminal sleeve 4 is provided above the tail pipe 1, and a sealing structure 6 is provided between the tail pipe 1 and the cable terminal sleeve 4. The sealing structure 6 includes a sealing groove 601, which is machined on the inner wall of the first flange 2 and the second flange 3. The inner wall of the sealing groove 601 abuts against a lip seal 602. An O-ring seal 603 is fixedly connected to the inner wall of the lip seal 602. The lip seal 602 and the O-ring seal can play a sealing role.

[0015] The inner wall of the O-ring 603 is pressed against the cable 5. The outer wall of the cable 5 is inserted into the cable terminal sleeve 4 and the tail pipe 1 respectively. The lower part of the cable terminal sleeve 4 is fixedly connected to the second flange 3, and the upper part of the tail pipe 1 is fixedly connected to the first flange 2. The first flange 2 and the second flange 3 are connected by bolts and nuts.

[0016] Working principle: Using high-voltage cable terminal tailpipe structure: The operator first passes the cable head through the cable terminal sleeve 4, then through the second flange 3 (at which point the lip seal 602 has already been installed), the first flange 2, and finally installs it onto the tail pipe 1 (attached). Figure 1 and attached Figure 2 (Partial view of the middle tailpipe 1) Inside; The operator then inserts the lip seal 602 into the sealing groove 601 machined in the first flange 2 and the second flange 3, and then installs the multiple bolts and nuts, as shown in the attached diagram. Figure 2 As shown, When the cable is operating normally without vibration or displacement, the O-ring 603 can withstand the entire sealing pressure; When the cable is subjected to vibration from ground vehicles, the lip seal 602 is axially restricted by the sealing groove 601. The lip seal 602 undergoes elastic deformation and automatically adheres to the surface of the sealing groove 601, forming a dynamic sealing barrier. This achieves a double sealing effect through the O-ring seal 603 and the lip seal 602, reducing the chance of reduced sealing effect when the cable vibrates.

[0017] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail are possible within the scope of the claims.

Claims

1. A high-voltage cable terminal tail pipe structure, comprising a tail pipe (1) and a cable terminal sleeve (4), wherein the cable terminal sleeve (4) is provided above the tail pipe (1), characterized in that: A sealing structure (6) is provided between the tail pipe (1) and the cable terminal sleeve (4). The sealing structure (6) includes a sealing groove (601). The sealing groove (601) is machined on the inner wall of the first flange (2) and the second flange (3). The inner wall of the sealing groove (601) abuts against the lip seal (602). An O-ring seal (603) is fixedly connected to the inner wall of the lip seal (602).

2. The high-voltage cable terminal tailpipe structure according to claim 1, characterized in that: The inner wall of the O-ring (603) is pressed against the cable (5).

3. The high-voltage cable terminal tailpipe structure according to claim 1, characterized in that: The outer wall of the cable (5) is inserted into the cable terminal sleeve (4) and the tail tube (1) respectively.

4. The high-voltage cable terminal tailpipe structure according to claim 1, characterized in that: The cable terminal sleeve (4) is fixedly connected to the second flange (3) below.

5. The high-voltage cable terminal tailpipe structure according to claim 1, characterized in that: The tailpipe (1) is fixedly connected to the first flange (2) above.

6. The high-voltage cable terminal tailpipe structure according to claim 1, characterized in that: The first flange (2) and the second flange (3) are connected by bolts and nuts.

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