CN210092845U - Tail pipe sealing device of cable terminal - Google Patents

Abstract

The application provides a tail pipe sealing device of cable terminal, including electrically conductive sheath, electrically conductive spiro ring, tail pipe and mounting flange. The conductive sheath is sleeved and fixed on the cable body. The conductive ring is sleeved on the conductive sheath and is detachably connected with the conductive sheath. The tail pipe is hermetically and detachably connected with the conductive spiral ring. The first end of the conductive sheath extends into the tail pipe along the first end of the tail pipe. The second end of the tail pipe is detachably and fixedly connected with the casing pipe, and the second end of the tail pipe is hermetically connected with the casing pipe. The fixing flange is sleeved on the conductive sheath. The fixing flange is detachably and fixedly connected with one end, far away from the sleeve, of the conductive spiral ring, and the conductive spiral ring is hermetically connected with the conductive sheath. The sealing device has the advantages of simple sealing process, no technical level limitation of technicians in field installation, simple field operation and high dismounting efficiency.

Description

Tail pipe sealing device of cable terminal

Technical Field

The application relates to the technical field of cable sealing, in particular to a tail pipe sealing device of a cable terminal.

Background

With the continuous development of industrialization in recent years, the demand for power cables is increasing. The high-voltage cable is widely applied to a power transmission and transformation system of a national power grid, and the cable is sealed in a tail pipe mode, so that the excellent sealing performance of the cable can be guaranteed.

The high-voltage cable terminal is characterized in that tail pipes made of metal are arranged outside the high-voltage cable terminal main body, and the tail pipes need to be reliably connected with a cable metal sheath, so that the structural hierarchy of the high-voltage cable terminal is similar to that of a cable, and the metal shielding and mechanical protection functions are realized. Meanwhile, the tail pipe is required to be reliably sealed with the metal sheath, so that external water vapor is prevented from entering the tail pipe to cause breakdown of the main body of the high-voltage cable terminal.

At present, the tail pipe is mainly used for realizing the electrical connection and the sealing structure with a cable metal sheath by adopting a lead sealing process. The quality of the lead sealing process depends on the technical level of workers to a great extent, and the lead sealing quality is low due to the fact that the technical level of the workers is uneven and is easily influenced by factors such as installation operation environment, lead sealing time and temperature and the like; in addition, the field operation of the lead sealing process is complex, and the efficiency is relatively low.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a tail pipe sealing device for a cable terminal, which aims at the problems that the existing tail pipe and a cable metal sheath are sealed by a lead sealing process, the lead sealing quality is not high due to uneven levels of technicians, and the field operation of the lead sealing process is complex and the efficiency is low.

A tailpipe sealing device for a cable termination, comprising:

the conductive sheath is sleeved and fixed on the cable body;

the conductive spiral ring is sleeved on the conductive sheath and is detachably connected with the conductive sheath;

the tail pipe is hermetically and detachably connected with the conductive spiral ring, the first end of the conductive sheath extends into the tail pipe along the first end of the tail pipe, the second end of the tail pipe is detachably and fixedly connected with the sleeve, and the second end of the tail pipe is hermetically connected with the sleeve; and

the fixing flange is sleeved on the conductive sheath and detachably and fixedly connected with one end, far away from the sleeve, of the conductive spiral ring, and the conductive spiral ring is hermetically connected with the conductive sheath.

In one embodiment, the tail tube sealing device of the cable terminal further includes:

and the second end of the tail pipe is hermetically connected with the sleeve through the second sealing ring.

In one embodiment, the second end of the tail pipe is provided with a groove, and the second sealing ring is embedded in the groove.

In one embodiment, the tail pipe and the casing pipe are detachably and fixedly connected through a first bolt.

In one embodiment, the tail tube sealing device of the cable terminal further includes:

the conductive spiral ring is connected with the tail pipe in a sealing mode through the first sealing ring.

In one embodiment, the tail tube sealing device of the cable terminal further includes:

the sealing ring is sleeved on the conductive sheath, arranged between the conductive spiral ring and the conductive sheath and arranged at one end of the conductive spiral ring far away from the tail pipe, and the conductive spiral ring is in sealing connection with the conductive sheath through the sealing ring.

In one embodiment, the conductive toroid comprises:

the first connecting part is sleeved at the first end of the tail pipe, and is connected with the tail pipe in a sealing and detachable mode;

the second connecting part is fixedly and hermetically connected with the first connecting part, and is sleeved on the conductive sheath and detachably connected with the conductive sheath; and

the third connecting portion is fixedly and hermetically connected with the second connecting portion, the second connecting portion is arranged between the first connecting portion and the third connecting portion, the third connecting portion is sealed with the conductive sheath through the sealing ring, and one end of the third connecting portion, far away from the second connecting portion, is fixedly connected with the fixing flange.

In one embodiment, the tail tube sealing device of the cable terminal further includes:

the annular boss is sleeved on the conductive sheath, fixed on one side, close to the sealing ring, of the fixing flange and used for limiting the sealing ring, and the diameter of the annular boss is the same as that of the sealing ring and smaller than the inner diameter of the third connecting portion.

In one embodiment, the second connecting portion has an inner diameter smaller than the inner diameters of the first and third connecting portions.

In one embodiment, the fixing flange is fixedly connected with the conductive spiral ring through a second bolt.

In one embodiment, the tail tube sealing device of the cable terminal further includes:

and the wire lug is fixed on one side of the tail pipe, which is far away from the conductive sheath, and is electrically connected with the conductive sheath.

Compared with the prior art, the tail pipe sealing device of the cable terminal has the advantages that the first end of the conductive sheath extends into the tail pipe, is sleeved on the conductive sheath through the conductive spiral ring and is matched with the tail pipe, and one end of the conductive spiral ring is hermetically and detachably connected with the tail pipe; meanwhile, the other end of the conductive spiral ring is sealed with the conductive sheath (100) and matched with the fixing flange to form a locking and fixing mechanism, so that the tail pipe is reliably and hermetically connected with the conductive sheath. The sealing device has the advantages of simple sealing process, no technical level limitation of technicians in field installation, simple field operation and high dismounting efficiency.

Drawings

Fig. 1 is a schematic structural view of a tail tube sealing device of a cable termination according to an embodiment of the present disclosure;

fig. 2 is a schematic view of the installation of a tail tube sealing device of a cable termination provided in an embodiment of the present application;

FIG. 3 is an enlarged view at C of FIG. 1;

FIG. 4 is an enlarged view taken at A in FIG. 1;

FIG. 5 is a schematic structural diagram of a mounting flange according to an embodiment of the present disclosure;

fig. 6 is an enlarged view at B in fig. 1.

10 tail pipe sealing device of cable terminal

100 conductive sheath

101 cable body

200 conductive spiro ring

210 first connection part

211 first seal ring

220 second connecting part

230 third connecting part

300 tail pipe

301 casing tube

310 second seal ring

311 groove

320 first bolt

330 wire ear

400 sealing ring

500 mounting flange

501 second bolt

502 bolt hole

510 ring boss

600 outer sheath

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and those skilled in the art will be able to make similar modifications without departing from the spirit of the application and it is therefore not intended to be limited to the embodiments disclosed below.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 and 2, an embodiment of the present application provides a tail tube sealing device 10 for a cable termination, including: conductive sheath 100, conductive spiral ring 200, tail pipe 300 and mounting flange 500. The conductive sheath 100 is sleeved and fixed on the cable body 101. The conductive spiral ring 200 is sleeved on the conductive sheath 100 and detachably connected to the conductive sheath 100. The tail pipe 300 is hermetically and detachably connected to the conductive screw ring 200. The first end of the conductive sheath 100 extends into the tailpipe 300 along the first end of the tailpipe 300. The second end of the tail pipe 300 is detachably and fixedly connected with the casing 301, and the second end of the tail pipe 300 is hermetically connected with the casing 301. The fixing flange 500 is sleeved on the conductive sheath 100. The fixing flange 500 is detachably and fixedly connected with one end of the conductive spiral ring 200 far away from the sleeve 301, and the conductive spiral ring 200 is hermetically connected with the conductive sheath 100.

It is understood that the material of the conductive sheath 100 is not limited as long as it maintains the shape and has the function of conducting electricity. The specific material of the conductive sheath 100 can be selected according to actual requirements. In one embodiment, the material of the conductive sheath 100 may be metal, such as copper, aluminum, etc. In one embodiment, the material of the conductive sheath 100 may also be a conductive composite material, such as conductive plastic, conductive rubber, etc.

In one embodiment, the fixing manner between the conductive sheath 100 and the cable body 101 is not limited, as long as the fixing between the conductive sheath 100 and the cable body 101 is ensured. In one embodiment, the conductive sheath 100 may be fixed to the cable body 101 by means of adhesion. In one embodiment, the conductive sheath 100 and the cable body 101 may be fixed by injection molding. In one embodiment, the inner diameter of the conductive sheath 100 is greater than the diameter of the cable body 101.

It is understood that the material of the conductive spiral ring 200 is not limited as long as it maintains the shape and has the function of conductivity. The specific material of the conductive spiral ring 200 can be selected according to actual requirements. In one embodiment, the conductive loop 200 may be made of metal, such as copper, aluminum, etc. In one embodiment, the conductive spiral ring 200 may also be made of a conductive composite material, such as conductive plastic, conductive rubber, etc.

In one embodiment, the conductive toroid 200 is removably connected to the conductive sheath 100. Specifically, the conductive spiral ring 200 and the conductive sheath 100 may be connected by a screw thread. Namely: the outer wall of the conductive sheath 100 is provided with threads, the inner wall of the conductive spiral ring 200 is provided with internal threads matched with the threads of the conductive sheath 100, and the two form a threaded connection structure. By adopting the threaded connection structure, the contact area between the two is large, and the conductive effect is increased. In one embodiment, the inner diameter of the conductive toroid 200 is larger than the outer diameter of the conductive sheath 100.

It is to be understood that the material of the tail pipe 300 is not limited as long as the shape is maintained. The specific material of the tail pipe 300 can be selected according to actual requirements. In one embodiment, the material of the tail pipe 300 may be metal, such as copper, aluminum, etc. In one embodiment, the material of the tail pipe 300 may also be a conductive composite material, such as conductive plastic, conductive rubber, etc.

In one embodiment, the tailpipe 300 is hermetically sealed and removably connected to the conductive toroid 200. In one embodiment, the tail pipe 300 and the conductive screw ring 200 may be screwed together. Specifically, an external thread is disposed on a side wall of one end of the tail pipe 300, and is matched with the internal thread of the conductive spiral ring 200 to form a threaded connection structure. By adopting the threaded connection structure, the contact area between the two is large, the conductive effect is improved, meanwhile, the field installation is not limited by the technical level of technicians, and the threaded connection structure has the advantages of simple field operation and high dismounting efficiency.

In one embodiment, the way of detachably and fixedly connecting the second end of the tail pipe 300 to the casing 301 is not limited as long as the tail pipe 300 and the casing 301 are fixed. In one embodiment, the second end of the tailpipe 300 and the casing 301 may be secured by bolts. In one embodiment, the second end of the tailpipe 300 and the casing 301 may also be secured by a snap fit.

In one embodiment, the connection between the tail pipe 300 and the conductive screw ring 200 may be sealed by a sealing ring. In one embodiment, a first end of the conductive sheath 100 extends into the tail tube 300 along a first end of the tail tube 300, and a second end of the conductive sheath 100 extends along the conductive coil 200 near the first end of the conductive sheath 100 and along a second end of the conductive coil 200. By adopting the sealing and detachable connection structure between the tail pipe 300 and the conductive spiral ring 200, when the tail pipe 300 is packaged or disassembled, the conductive sheath 100 does not need to be melted or sealed by flame, and the cable body 101 is not damaged due to overheating of the conductive sheath 100.

In one embodiment, the way of sealing the second end of the tailpipe 300 with the casing 301 is not limited as long as the seal between the tailpipe 300 and the casing 301 is ensured. In one embodiment, the tailpipe 300 and casing 301 may be sealed by a sealing ring. The tail pipe 300 and the casing 301 may be sealed by a sealing gasket. In one embodiment, the cannula 301 may be an epoxy cannula.

In one embodiment, the sealing connection between the conductive spiral ring 200 and the conductive sheath 100 is not limited, as long as the sealing between the conductive spiral ring 200 and the conductive sheath 100 is ensured. In one embodiment, the conductive toroid 200 and the conductive sheath 100 may be sealed by a gasket. In one embodiment, the conductive ring 200 and the conductive sheath 100 may be sealed by a sealing ring.

In one embodiment, the material of the fixing flange 500 may be copper or other non-magnetic metal material. In one embodiment, the detachable fastening between the fastening flange 500 and the conductive ring 200 is not limited, as long as the fastening between the two is ensured. In one embodiment, the fixing flange 500 and the conductive ring 200 may be fixed by a snap. In one embodiment, the fixing flange 500 and the conductive ring 200 may be fixed by bolts.

In this embodiment, the first end of the conductive sheath 100 extends into the tail pipe 300, and is sleeved on the conductive sheath 100 through the conductive screw ring 200, and is simultaneously matched with the tail pipe 300, so that the first end of the conductive screw ring 200 is hermetically and threadedly connected with the tail pipe 300; meanwhile, the other end of the conductive spiral ring 200 is sealed by the sealing ring 400 and is matched with the fixing flange 500 to form a locking and fixing mechanism, so that the tail pipe 300 is reliably and hermetically connected with the conductive sheath 100. The sealing device has the advantages that the sealing capacity is not influenced by expansion and contraction factors, the sealing performance is durable and efficient, and meanwhile, the sealing process is simple and the operation is portable.

Referring to fig. 3, in one embodiment, the tail pipe sealing device 10 of the cable terminal further includes: a second seal ring 310. The second end of the tailpipe 300 is sealed and fixedly connected to the casing 301 by the second seal ring 310. In one embodiment, the material of the second sealing ring 310 may be a rubber material. In one embodiment, the tailpipe 300 and the casing 301 may be secured by a snap-fit. In one embodiment, the tailpipe 300 and the casing 301 may also be secured by bolting.

In one embodiment, the second end of the tailpipe 300 is provided with a recess 311. The second sealing ring 310 is embedded in the groove 311. In one embodiment, the second sealing ring 310 is inserted into the groove 311, and the tail pipe 300 is fixed to the casing 301 by the first bolt 320, so that the tail pipe is sealed by the sealing structure, which has the advantage of easy assembly and disassembly.

In one embodiment, the tail tube sealing device 10 of the cable termination further comprises: and a seal ring 400. The sealing ring 400 is sleeved on the conductive sheath 100. The sealing ring 400 is disposed between the conductive ring 200 and the conductive sheath 100, and is disposed at an end of the conductive ring 200 away from the tail pipe 300. The conductive spiral ring 200 and the conductive sheath 100 are hermetically connected through the sealing ring 400.

In one embodiment, the sealing ring 400 is sleeved on the conductive sheath 100 and is disposed between the conductive toroid 200 and the conductive sheath 100; that is, the inner diameter of the sealing ring 400 is larger than the outer diameter of the conductive sheath 100, and the outer diameter of the sealing ring 400 is smaller than the inner diameter of the conductive toroid 200. The sealing ring 400 is used to enable the fixing flange 500 and the conductive ring 200 to be connected in a sealing manner. In one embodiment, the width of the seal ring 400 may be equal or approximately equal to the length of the three corrugations in the thread of the conductive sheath 100. In one embodiment, the material of the sealing ring 400 may be rubber. The sealing ring 400 is retained between the conductive screw ring 200 and the conductive sheath 100 by the fixing flange 500, so that the conductive screw ring 200 and the conductive sheath 100 are sealed.

In one embodiment, the conductive toroid 200 comprises: a first connection portion 210, a second connection portion 220, and a third connection portion 230. The first connection portion 210 is sleeved at a first end of the tail pipe 300, and is connected with the tail pipe 300 in a sealing manner and detachably. The second connecting portion 220 is fixedly and hermetically connected to the first connecting portion 210. The second connecting portion 220 is sleeved on the conductive sheath 100 and detachably connected to the conductive sheath 100. The third connecting portion 230 is fixedly and hermetically connected to the second connecting portion 220. The second connection portion 220 is disposed between the first connection portion 210 and the third connection portion 230. The third connection portion 230 is sealed with the conductive sheath 100 by the sealing ring 400. One end of the third connecting portion 230 away from the second connecting portion 220 is fixedly connected to the fixing flange 500.

In one embodiment, the first connector 210 is detachably connected to the tailpipe 300 by: and (4) connecting by screw threads. Specifically, the first connection portion 210 is provided with an internal thread, and the tail pipe 300 is provided with an external thread engaged with the internal thread, thereby forming a threaded connection structure. Meanwhile, the first connection portion 210 and the tail pipe 300 can be connected in a sealing manner by a first sealing ring 211 (as shown in fig. 4). Specifically, the first sealing ring 211 may be inserted into a groove of the first connection portion 210. In one embodiment, the material of the first sealing ring 211 may be a rubber material.

In one embodiment, the second connection portion 220 has an inner diameter smaller than that of the first connection portion 210. Meanwhile, the inner diameter of the second connection portion 220 is the same as or approximately the same as the inner diameter of the tail pipe 300 near the first connection portion 210. In one embodiment, the detachable connection between the second connection portion 220 and the conductive sheath 100 is as follows: and (4) connecting by screw threads. Specifically, the second connection portion 220 is provided with an internal thread matched with the thread of the conductive sheath 100, and the threaded connection structure can increase the contact area between the two parts and increase the conductive effect.

In one embodiment, the third connection part 230 may have a funnel shape. In one embodiment, the inner diameter of the third connecting portion 230 near the second connecting portion 220 is smaller than the inner diameter of the third connecting portion 230 far from the second connecting portion 220. In one embodiment, a side wall of the third connection portion 230 near one end of the second connection portion 220 is disposed at an acute angle with respect to a side wall of the conductive sheath 100.

Meanwhile, the side wall of the contact position of the sealing ring 400 and the side wall is an inclined surface, and the angle between the inclined surface and the side wall of the conductive sheath 100 is the same as the acute angle. So that the third connection part 230 and the conductive sheath 100 can be sealed by the sealing ring 400 and fixed by the fixing flange 500. In one embodiment, the third connecting portion 230 and the fixing flange 500 may be fixed by bolts or by a snap-fit. In one embodiment, the first connection portion 210 and the second connection portion 220 may be a unitary structure. In one embodiment, the second connecting portion 220 and the third connecting portion 230 may be integrally formed.

Referring to fig. 5, in one embodiment, the tail pipe sealing device 10 of the cable terminal further includes: an annular boss 510. The annular boss 510 is sleeved on the conductive sheath 100 and fixed to one side of the fixing flange 500 close to the sealing ring 400. The annular boss 510 is used for limiting the sealing ring 400. The diameter of the annular boss 510 is the same as that of the seal ring 400 and is smaller than the inner diameter of the third connection part 230. The sealing ring 400 is restrained between the third connection part 230 and the conductive sheath 100 by the annular boss 510, thereby achieving a sealing effect. In one embodiment, the annular boss 510 and the mounting flange 500 may be a unitary structure.

Referring to fig. 6, in one embodiment, the fixing flange 500 and the conductive screw ring 200 may be fixedly connected by a second bolt 501. In one embodiment, the fixing flange 500 is provided with a plurality of bolt holes 502 (e.g., four, six, etc.). The number of the second bolts 501 may be plural, and corresponds to the bolt holes 502 one to one. That is, each bolt hole 502 is provided with one second bolt 501, so that the fixing flange 500 and the conductive screw ring 200 are fitted and fixed to the bolt hole 502 by the second bolt 501.

In one embodiment, the tail tube sealing device 10 of the cable termination further comprises: and a wire lug 330. The lug 330 is fixed to the tail pipe 300 on the side away from the conductive sheath 100. The wire lug 330 is electrically connected to the conductive sheath 100. The lug 330 can be used to transmit electrical energy from the cable body 101 to a consumer.

The assembly process of this application does:

firstly, after the high-voltage cable is opened (i.e. after the outer sheath 600 is cut), the fixing flange 500, the sealing ring 400, the conductive spiral ring 200, the first sealing ring 211, the second sealing ring 310, the conductive sheath 100, the tail pipe 300 and the like are sequentially sleeved in the cable body 101. Then, the second sealing ring 310 is embedded into the groove 311 of the tail pipe 300, and the tail pipe 300 is locked and fastened with a high-voltage cable terminal sleeve (such as an epoxy sleeve of a GIS terminal) by the first bolt 320, so that the tail pipe and the high-voltage cable terminal sleeve are hermetically sealed. Next, one end of the conductive screw ring 200 close to the tail pipe 300 is inserted into the first sealing ring 211, and then is screwed into the tail pipe 300, thereby achieving airtight sealing of the contact surface therebetween.

Finally, the sealing ring 400 is sleeved between the conductive sheath 100 and the conductive ring 200, the sealing ring 400 is supported by the annular boss 510 of the fixing flange 500, and then the fixing flange 500 is tightly locked by the first bolts 501 (i.e., the fixing flange 500 and the conductive ring 200 are fixed by the second bolts 501). Thus, the airtight sealing treatment of the conductive spiral ring 200, that is, the overall sealing operation of the tail pipe of the high-voltage cable terminal is realized.

To sum up, in the present application, the first end of the conductive sheath 100 extends into the tail pipe 300, and is sleeved on the conductive sheath 100 through the conductive spiral ring 200, and is simultaneously matched with the tail pipe 300, so that the first end of the conductive spiral ring 200 is hermetically and threadedly connected with the tail pipe 300; meanwhile, the other end of the conductive spiral ring 200 is sealed by the sealing ring 400 and is matched with the fixing flange 500 to form a locking and fixing mechanism, so that the tail pipe 300 is reliably and hermetically connected with the conductive sheath 100. Sealing device, sealing capacity is not influenced by expend with heat and contract with cold factor, sealing performance is lasting and high-efficient, the sealing process of this application is simple simultaneously, it is portable to operate.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A tailpipe sealing device for a cable termination, comprising:

the conductive sheath (100) is sleeved and fixed on the cable body (101);

the conductive spiral ring (200) is sleeved on the conductive sheath (100) and is detachably connected with the conductive sheath (100);

the tail pipe (300) is hermetically and detachably connected with the conductive spiral ring (200), the first end of the conductive sheath (100) extends into the tail pipe (300) along the first end of the tail pipe (300), the second end of the tail pipe (300) is detachably and fixedly connected with the casing (301), and the second end of the tail pipe (300) is hermetically connected with the casing (301); and

the fixing flange (500) is sleeved on the conductive sheath (100) and detachably and fixedly connected with one end, far away from the sleeve (301), of the conductive spiral ring (200), and the conductive spiral ring (200) is hermetically connected with the conductive sheath (100).

2. The pigtail seal of a cable termination of claim 1, further comprising:

and the second end of the tail pipe (300) is connected with the casing pipe (301) in a sealing mode through the second sealing ring (310).

3. The pigtail seal of a cable termination according to claim 2, wherein the second end of the pigtail (300) is provided with a groove (311), the second sealing ring (310) being embedded in the groove (311).

4. The pigtail seal of a cable termination according to claim 2, wherein the pigtail (300) is removably secured to the sleeve (301) by a first bolt (320).

5. The pigtail seal of a cable termination of claim 1, further comprising:

the conductive spiral ring (200) is connected with the tail pipe (300) in a sealing mode through the first sealing ring (211).

6. The pigtail seal of a cable termination of claim 5, further comprising:

the sealing ring (400) is sleeved on the conductive sheath (100), arranged between the conductive spiral ring (200) and the conductive sheath (100), and arranged at one end, far away from the tail pipe (300), of the conductive spiral ring (200), and the conductive spiral ring (200) is in sealing connection with the conductive sheath (100) through the sealing ring (400).

7. The pigtail seal of a cable termination of claim 6, wherein said conductive toroid (200) comprises:

the first connecting part (210) is sleeved at the first end of the tail pipe (300) and is connected with the tail pipe (300) in a sealing and detachable mode;

the second connecting part (220) is fixedly and hermetically connected with the first connecting part (210), and the second connecting part (220) is sleeved on the conductive sheath (100) and detachably connected with the conductive sheath (100); and

the third connecting portion (230) is fixedly and hermetically connected with the second connecting portion (220), the second connecting portion (220) is arranged between the first connecting portion (210) and the third connecting portion (230), the third connecting portion (230) and the conductive sheath (100) are sealed through the sealing ring (400), and one end, far away from the second connecting portion (220), of the third connecting portion (230) is fixedly connected with the fixing flange (500).

8. The pigtail seal of a cable termination of claim 7, further comprising:

the annular boss (510) is sleeved on the conductive sheath (100), fixed on one side, close to the sealing ring (400), of the fixing flange (500) and used for limiting the sealing ring (400), and the diameter of the annular boss (510) is the same as that of the sealing ring (400) and smaller than the inner diameter of the third connecting portion (230).

9. The pigtail seal of a cable termination of claim 7, wherein the second connection section (220) has an inner diameter smaller than the inner diameter of the first connection section (210) and the inner diameter of the third connection section (230).

10. The pigtail seal of a cable termination according to claim 1, wherein the fixing flange (500) is fixedly connected to the conductive screw ring (200) by means of second bolts (501).

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