CN215498214U - Porcelain bushing type cold-shrinkage cable terminal and cable transmission line system - Google Patents
Porcelain bushing type cold-shrinkage cable terminal and cable transmission line system Download PDFInfo
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- CN215498214U CN215498214U CN202121316467.9U CN202121316467U CN215498214U CN 215498214 U CN215498214 U CN 215498214U CN 202121316467 U CN202121316467 U CN 202121316467U CN 215498214 U CN215498214 U CN 215498214U
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- 229910052573 porcelain Inorganic materials 0.000 title claims abstract description 74
- 230000005540 biological transmission Effects 0.000 title claims abstract description 16
- 238000007789 sealing Methods 0.000 claims abstract description 48
- 239000000945 filler Substances 0.000 claims abstract description 31
- 239000007788 liquid Substances 0.000 claims abstract description 23
- 210000004907 gland Anatomy 0.000 claims description 9
- 239000012212 insulator Substances 0.000 claims description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 229920002367 Polyisobutene Polymers 0.000 claims description 3
- 229920002545 silicone oil Polymers 0.000 claims description 3
- 239000004576 sand Substances 0.000 abstract description 9
- 230000006378 damage Effects 0.000 abstract description 7
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000003137 locomotive effect Effects 0.000 description 14
- 238000009413 insulation Methods 0.000 description 6
- 229920001971 elastomer Polymers 0.000 description 5
- 239000003921 oil Substances 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 210000001503 joint Anatomy 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000004575 stone Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000009422 external insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 229920002379 silicone rubber Polymers 0.000 description 1
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Abstract
The utility model discloses a porcelain bushing type cold-contraction cable terminal and a cable transmission line system, wherein the porcelain bushing type cold-contraction cable terminal comprises a sleeve, a cable, an insulating filler and a sealing structure, the sleeve is provided with an inner cavity, the cable penetrates through the inner cavity and is enclosed with the cavity wall of the sleeve to form an insulating cavity, the insulating filler is filled in the insulating cavity, the insulating filler is a liquid insulating filler, the sealing structure comprises a first connecting assembly and a second connecting assembly which are arranged at two ends of the sleeve, and the first connecting assembly and the second connecting assembly are respectively connected with the cable. The porcelain bushing type cold-shrinkable cable terminal has good insulating property, effectively reduces creepage, can avoid damage and corrosion of sand wind and environmental factors to cable accessories, and effectively improves the reliability and stability of the cable accessories; meanwhile, the sealing performance is improved, and the problems of oil leakage and the like at the cable terminal are effectively avoided.
Description
Technical Field
The utility model relates to the technical field of laying and installing structures of electrified cable transmission lines, in particular to a porcelain bushing type cold-shrink cable terminal and a cable transmission line system applying the porcelain bushing type cold-shrink cable terminal.
Background
At present, the terminal joints of the electric railway cables at home and abroad are commonly used in a cold shrinkage type, a prefabricated type and a heat shrinkage type. At present, domestic electrified railway locomotives are generally provided with cables on the roofs of the locomotives, and the cables are used for transmitting electric energy of electric equipment between carriages of the locomotives. In the related art, the insulation performance of the terminal connector is poor, and a creepage phenomenon exists. Meanwhile, the sealing performance of the terminal joint is poor, so that the terminal joint has the problems of oil leakage and the like.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide a porcelain bushing type cold-shrinkable cable terminal and a cable transmission line system, aiming at providing a porcelain bushing type cold-shrinkable cable terminal which has good insulating property and effectively reduces creepage, and the porcelain bushing type cold-shrinkable cable terminal not only can prevent a sleeve with high mechanical strength from damaging and corroding cable accessories due to wind sand and environmental factors, but also can effectively improve the reliability and stability of the cable accessories; meanwhile, the sealing performance is improved, and the problems of oil leakage and the like at the cable terminal are effectively avoided.
In order to achieve the above object, the present invention provides a porcelain bushing type cold-shrink cable terminal, comprising:
the sleeve is provided with an inner cavity;
the cable penetrates through the inner cavity and is enclosed with the cavity wall of the sleeve to form an insulating cavity;
the insulating filler is filled in the insulating cavity and is liquid; and
the sealing structure comprises a first connecting assembly and a second connecting assembly which are arranged at two ends of the sleeve, and the first connecting assembly and the second connecting assembly are respectively connected with the cable.
In one embodiment, the first connection assembly comprises:
the base is arranged at one end, far away from the second connecting component, of the sleeve, the base is provided with a wire passing hole communicated with the inner cavity, and the cable penetrates through the wire passing hole;
the first flange is sleeved on the outer wall of the sleeve and is connected with the base; and
the insulator is arranged on one side, back to the first flange, of the base.
In one embodiment, the second connection assembly includes:
the top cover is arranged at one end of the sleeve, which is far away from the base, and is provided with a through hole communicated with the inner cavity;
one end of the binding post penetrates through the through hole to extend into the inner cavity and is connected with the cable; and
and the second flange is sleeved on the outer wall of the sleeve and is connected with the top cover.
In an embodiment, the second connection assembly further comprises:
the gland is arranged at one end of the binding post, which is far away from the cable, and is connected with the top cover; and
the tight ring is sleeved on the wiring terminal and is connected with the gland.
In an embodiment, porcelain bushing type shrinkage cable terminal still includes shield cover and terminal, the shield cover lid in the top cap dorsad telescopic one side, and with the top cap encloses to close and forms the shielding chamber, the shield cover is equipped with the intercommunication the through-hole in shielding chamber, the terminal is kept away from the one end of cable is passed the shielding chamber with the through-hole, and with the terminal is connected, the gland with the tight circle hold in the shielding chamber, the tight circle is located the gland dorsad one side of top cap.
In one embodiment, the terminal is a hardware fitting;
and/or a plurality of first reinforcing ribs are arranged on the outer wall of the first flange;
and/or a plurality of second reinforcing ribs are arranged on the outer wall of the second flange;
and/or a first sealing ring is clamped between the sleeve and the base;
and/or a second sealing ring is clamped between the sleeve and the top cover;
and/or a slot is arranged at one end of the binding post extending into the inner cavity, and one end of the cable positioned in the inner cavity is inserted into the slot;
and/or the porcelain sleeve type cold-contraction cable terminal also comprises a ground wire, and one end of the ground wire is connected with the base;
and/or, the base dorsad one side of the sleeve is also provided with a sheath surrounding the wire passing hole, the sheath is sleeved on the outer wall of the cable and tightly attached to the outer wall of the cable, the porcelain bushing type cold-shrink cable terminal further comprises a cold-shrink pipe, and the cold-shrink pipe is sleeved on the outer wall of the sheath.
In an embodiment, the porcelain bushing type cold-shrink cable terminal further comprises a stress cone arranged in the insulating cavity, the stress cone sleeve is arranged on the outer wall of the cable and is tightly attached to the outer wall of the cable, and the outer wall of the stress cone and the inner wall of the inner cavity are arranged at intervals.
In one embodiment, the liquid insulating filler is silicone oil or polyisobutylene.
In one embodiment, the sleeve is a porcelain sleeve, the outer wall of the sleeve is provided with a plurality of umbrella skirts, and the umbrella skirts are arranged on the outer wall of the sleeve at intervals.
The utility model further provides a cable transmission line system which comprises a cable and the porcelain bushing type cold-shrink cable terminal, wherein at least one end of the cable of the porcelain bushing type cold-shrink cable terminal is connected with the cable.
According to the technical scheme, the inner cavity is formed in the sleeve, so that the cable penetrates through the inner cavity of the sleeve and is surrounded with the cavity wall of the inner cavity of the sleeve to form the insulating cavity, the liquid insulating filler is filled in the insulating cavity, and the insulating cavity is sealed by the first connecting assembly and the second connecting assembly of the sealing structure, so that the liquid insulating filler is adopted as insulation to effectively fill gaps among liquid insulating parts, the operation reliability of cable accessories is improved, meanwhile, the space in the cavity is expanded, the creepage phenomenon of the outer wall of the sleeve is reduced, the sealing performance of the porcelain sleeve type cold-shrinkage cable terminal is improved, and the problems of oil leakage and the like of the cable terminal are effectively solved; meanwhile, the sleeve has high mechanical strength, can effectively avoid sand blown by the wind and damage and corrosion of environmental factors to the cable accessories, and improves the reliability and stability of the cable accessories. The porcelain bushing type cold-contraction cable terminal is applied to an electric locomotive, and can effectively avoid electrical faults caused by damage due to high-speed collision with suspended particles in air and raised sand and stones in the running process, so that the service life of the porcelain bushing type cold-contraction cable terminal is prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic cross-sectional view of a porcelain bushing type cold shrink cable termination according to an embodiment of the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | Porcelain bushing type cold |
51 | Top cover |
| 1 | |
511 | Via |
| 11 | |
52 | |
| 12 | |
521 | Inserting |
| 13 | Insulating |
53 | |
| 2 | Cable with a |
54 | |
| 3 | Insulating filler | 55 | Gland |
| 4 | First connecting component | 56 | |
| 41 | |
6 | |
| 411 | Wire through hole | 7 | |
| 412 | |
71 | Shielding cavity |
| 42 | |
72 | Through |
| 421 | First reinforcing rib | 8 | Terminal with a |
| 43 | |
91 | |
| 44 | |
92 | Cold shrink tube |
| 5 | Second connecting component |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
Also, the meaning of "and/or" and/or "appearing throughout is meant to encompass three scenarios, exemplified by" A and/or B "including scenario A, or scenario B, or scenarios where both A and B are satisfied.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
At present, the terminal joints of the electric railway cables at home and abroad are commonly used in a cold shrinkage type, a prefabricated type and a heat shrinkage type. At present, domestic electrified railway locomotives are generally provided with cables on the roofs of the locomotives, and the cables are used for transmitting electric energy of electric equipment between carriages of the locomotives. Because the speed per hour of the operation of the electric railway locomotive is high, the locomotive operation necessarily spans a plurality of regions, and the whole operation environment has large temperature and humidity difference. Meanwhile, factors such as suspended particles, sand blown by wind, smoke and haze and the like existing in the external environment all put forward strict running stability requirements on the electrified railway cable and accessories thereof. In the related art, the insulation performance of the terminal connector is poor, and a creepage phenomenon exists. Meanwhile, the sealing performance of the terminal joint is poor, so that the terminal joint has the problems of oil leakage and the like.
Based on the above-mentioned conception and problems, the present invention provides a porcelain bushing type cold shrink cable terminal 100. It can be understood that the porcelain bushing type cold-shrink cable terminal 100 can be applied to a cable transmission line system, so that the cable transmission line system is applied to a railway track traffic transmission line. The porcelain bushing type cold-shrink cable terminal 100 breaks through the existing voltage class, and can be applied to the voltage class of a 27.5kV railway track traffic transmission line by using the porcelain bushing type sleeve 1 and the liquid insulating filler as the insulating filler 3. The liquid insulating filler can effectively ensure the insulating property of the porcelain bushing type cold-shrink cable terminal 100, and the sleeve 1 made of the porcelain bushing material enables the porcelain bushing type cold-shrink cable terminal 100 to maintain the insulating reliability in a severe weather environment.
Referring to fig. 1, in an embodiment of the present invention, the porcelain bushing type cold shrink cable terminal 100 includes a sleeve 1, a cable 2, an insulating filler 3, and a sealing structure, wherein the sleeve 1 is provided with an inner cavity 11, the cable 2 is inserted into the inner cavity 11 and surrounds a cavity wall of the sleeve 1 to form an insulating cavity 13, the insulating filler 3 is filled in the insulating cavity 13, the insulating filler 3 is a liquid insulating filler, the sealing structure includes a first connecting component 4 and a second connecting component 5 which are disposed at two ends of the sleeve 1, and the first connecting component 4 and the second connecting component 5 are respectively connected to the cable 2.
In the present embodiment, the sleeve 1 is used for installing and fixing the components such as the cable 2, the insulating filler 3 and the sealing structure, that is, the sleeve 1 provides an installation basis for installing the components such as the cable 2, the insulating filler 3 and the sealing structure. It will be appreciated that the sleeve 1 may alternatively be of tubular construction, i.e. the sleeve 1 is of open-ended tubular construction, with an internal cavity 11 formed within the sleeve 1.
It can be understood that the openings at both ends of the sleeve 1 can be sealed by the first connection member 4 and the second connection member 5 of the sealing structure, so that the insulating filler 3 is filled in the insulating cavity 13, and the leakage of the insulating filler 3 is prevented. In this embodiment, cable 2 wears to locate in inner chamber 11, so make insulating filler 3 fill between the outer wall of cable 2 and the inner wall of inner chamber 11 to utilize liquid insulating filler effectively to fill the clearance between the outer wall of cable 2 and the inner wall of inner chamber 11, improve the reliability of cable 2 installation, enlarged the space of inner chamber 11 simultaneously, effectively reduced the creepage phenomenon of sleeve outer wall. Alternatively, the liquid insulating filler may be selected from silicone oil or polyisobutylene.
According to the porcelain bushing type cold-contraction cable terminal 100, the inner cavity 11 is arranged in the sleeve 1, so that the cable 2 penetrates through the inner cavity 11 of the sleeve 1 and is surrounded with the cavity wall of the inner cavity 11 of the sleeve 1 to form the insulating cavity 13, the insulating cavity 13 is filled with the liquid insulating filler, and the insulating cavity 13 is sealed by the first connecting assembly 4 and the second connecting assembly 5 of the sealing structure, so that the liquid insulating filler is used as insulation to effectively fill gaps among liquid insulating parts, the operation reliability of cable accessories is improved, the creepage phenomenon of the outer wall of the sleeve 1 is reduced due to the space in the cavity, the sealing performance of the porcelain bushing type cold-contraction cable terminal 100 is improved, and the problems of oil leakage and the like of the cable terminal are effectively avoided; meanwhile, the sleeve 1 has high mechanical strength, can effectively avoid sand wind and damage and corrosion of environmental factors to the cable accessories, and improves the reliability and stability of the cable accessories. The porcelain bushing type cold-shrink cable terminal 100 is applied to an electric locomotive, and can effectively avoid electrical faults caused by damage due to high-speed collision with suspended particles in air and raised sand and stones in the running process, so that the service life of the porcelain bushing type cold-shrink cable terminal is prolonged.
In one embodiment, as shown in fig. 1, the outer wall of the sleeve 1 is provided with a plurality of sheds 12, and the sheds 12 are arranged on the outer wall of the sleeve 1 at intervals. Alternatively, the sleeve 1 may be a porcelain sleeve.
In an embodiment, as shown in fig. 1, the ferrule type cold shrink cable terminal 100 further includes a stress cone 6 disposed in the insulating cavity 13, the stress cone 6 is sleeved on an outer wall of the cable 2 and closely attached to the outer wall of the cable 2, and the outer wall of the stress cone 6 is spaced apart from an inner wall of the inner cavity 11.
It can be understood that, by arranging the stress cone 6 in the inner cavity 11 of the sleeve 1, the stress cone 6 is utilized to effectively change the potential distribution of the porcelain bushing type cold-shrink cable terminal 100, and the effect of uniform electric field intensity is achieved.
In the present embodiment, the stress cone 6 may be selected as a metal stress cone or a silicon rubber stress cone. The metal stress cone is arranged in the inner cavity 11 of the sleeve 1, and the electric potential distribution of the porcelain bushing type cold-shrink cable terminal 100 is controlled in a rubber stress cone mode, so that the detection of the external insulation of the porcelain bushing type cold-shrink cable terminal 100 is realized.
In an embodiment, as shown in fig. 1, the first connecting assembly 4 includes a base 41, a first flange 42 and an insulator 43, wherein the base 41 is disposed at an end of the sleeve 1 away from the second connecting assembly 5, the base 41 is provided with a wire passing hole 411 communicating with the inner cavity 11, the cable 2 is inserted into the wire passing hole 411, an end of the stress cone 6 is connected to a side of the base 41 facing the sleeve 1 and disposed around the wire passing hole 411, the first flange 42 is sleeved on an outer wall of the sleeve 1 and connected to the base 41, and the insulator 43 is disposed at a side of the base 41 opposite to the first flange 42.
In this embodiment, the base 41 is covered on one end of the sleeve 1 far away from the second connecting component 5, and the wire passing hole 411 communicated with the inner cavity 11 is arranged on the base 41, so that the cable 2 can conveniently pass through the wire passing hole 411 of the base 41 and extend into the inner cavity 11, and thus one end of the stress cone 6 sleeved on the cable 2 is connected with one side of the base 41 facing the sleeve 1 and is arranged around the wire passing hole 411.
It can be understood that, by providing the first flange 42 such that the first flange 42 is sleeved on the outer wall of the sleeve 1 and connected with the base 41, the porcelain sleeve type cold shrink cable terminal 100 can be stably mounted on other components, such as the top of the car of the rail car, etc., through the first flange 42, which is not limited herein. In this embodiment, in order to improve the structural strength of the first flange 42, the outer wall of the first flange 42 is provided with a plurality of first ribs 421. Alternatively, the plurality of first ribs 421 are disposed at intervals and extend in the axial direction of the sleeve 1, which is not limited herein.
In this embodiment, by providing the insulator 43, the flange 43 is disposed on a side of the base 41 opposite to the first flange 42, so that the insulator 43 can be utilized to achieve insulation grounding for the porcelain bushing type cold shrink cable terminal 100, so as to improve the safety of the porcelain bushing type cold shrink cable terminal 100.
As shown in fig. 1, the porcelain-type cold-shrink cable terminal 100 further includes a ground wire 91, and one end of the ground wire 91 is connected to the base 41. It can be understood that, by providing the ground wire 91, the ground wire 91 can be conveniently used for realizing grounding, and the safety of the porcelain bushing type cold shrink cable terminal 100 is further improved.
In one embodiment, as shown in fig. 1, a first sealing ring 44 is interposed between the sleeve 1 and the base 41. It can be understood that, by providing the first sealing ring 44, the first sealing ring 44 is clamped between the sleeve 1 and the base 41, so as to effectively improve the connection sealing performance between the sleeve 1 and the base 41, to ensure that the base 41 completely seals the opening of the inner cavity 11 of the sleeve 1, and to avoid the leakage of the liquid insulating filler in the insulating cavity 13.
In the present embodiment, the first sealing ring 44 may be a sealing ring, a gasket, a rubber ring, or the like, and is not limited herein. The material of the first sealing ring 44 may be selected from flexible materials with elasticity and waterproof performance, such as rubber, and is not limited herein. The base 41 is provided with a groove, and a part of the first sealing ring 44 is accommodated and limited in the groove, so that when the end of the sleeve 1 is connected with the base 41, the part of the first sealing ring 44 protruding out of the groove is elastically and sealingly abutted against the end of the sleeve 1, so as to realize the limited installation of the first sealing ring 44.
It can be understood that, when the cable 2 is inserted into the wire passing hole 411 of the base 41, the outer wall of the cable 2 is in sealing abutment with the hole wall of the wire passing hole 411, so as to further improve the sealing performance of the insulating cavity 13. In the present embodiment, the first flange 42 is provided with a plurality of mounting holes, and the base 41 is provided with a plurality of through holes corresponding to the plurality of mounting holes, so that the ferrule type cold shrink cable terminal 100 is mounted to the predetermined structure, and bolts or screws are connected to the predetermined structure through the through holes of the base 41 and the mounting holes of the first flange 42. The predetermined structure may be a mounting rack or other devices, which are not limited herein.
In an embodiment, as shown in fig. 1, a sheath 412 surrounding the wire passing hole 411 is further disposed on a side of the base 41 opposite to the sleeve 1, the sheath 412 is disposed on an outer wall of the cable 2 and closely attached to the outer wall of the cable 2, the porcelain sleeve type cold shrink cable terminal 100 further includes a cold shrink tube 92, and the cold shrink tube 92 is disposed on the outer wall of the sheath 412.
It can be understood that by arranging the sheath 412, the cable 2 is further protected by the sheath 412, and the cable 2 outside the sleeve 1 is prevented from being damaged in the running process of the locomotive. By providing the cold shrink tube 92 such that the cold shrink tube 92 is sleeved on the outer wall of the sheath 412, the protection of the cable 2 is further enhanced.
In an embodiment, as shown in fig. 1, the second connecting assembly 5 includes a top cover 51, a terminal post 52 and a second flange 53, wherein the top cover 51 is disposed at an end of the sleeve 1 away from the base 41, the top cover 51 is provided with a through hole 511 communicating with the inner cavity 11, an end of the terminal post 52 passes through the through hole 511 and extends into the inner cavity 11 and is connected to the cable 2, and the second flange 53 is disposed on an outer wall of the sleeve 1 and is connected to the top cover 51.
In this embodiment, the top cover 51 is covered on one end of the sleeve 1 far away from the base 41, and the top cover 51 is provided with a through hole 511 communicating with the inner cavity 11, so that one end of the binding post 52 can conveniently penetrate through the through hole 511 to extend into the inner cavity 11 and be connected with the cable 2, and the cable 2 is in conductive communication with an external cable through the binding post 52.
In one embodiment, as shown in fig. 1, a second sealing ring 54 is interposed between the sleeve 1 and the top cover 51. It can be understood that, by providing the second sealing ring 54, the second sealing ring 54 is clamped between the sleeve 1 and the top cover 51, so as to effectively improve the connection sealing property between the sleeve 1 and the top cover 51, so as to ensure that the top cover 51 completely seals the opening of the inner cavity 11 of the sleeve 1, and avoid the leakage of the liquid insulating filler in the insulating cavity 13.
In the present embodiment, the second sealing ring 54 may be a sealing ring, a gasket, a rubber ring, or the like, and is not limited herein. The second sealing ring 54 may be made of a flexible material with elasticity and waterproof performance, such as rubber, and is not limited herein. The top cover 51 is provided with a groove, and part of the second sealing ring 54 is accommodated and limited in the groove, so that when the end part of the sleeve 1 is connected with the top cover 51, the part of the second sealing ring 54 protruding out of the groove is elastically and hermetically abutted against the end part of the sleeve 1, so as to realize the limiting installation of the second sealing ring 54.
It can be understood that, by providing the second flange 53 such that the second flange 53 is sleeved on the outer wall of the sleeve 1 and connected with the top cover 51, the porcelain sleeve type cold shrink cable terminal 100 can be stably mounted on other parts, such as the top of the car of the rail locomotive, etc., through the second flange 53, which is not limited herein. In this embodiment, in order to improve the structural strength of the second flange 53, the outer wall of the second flange 53 is provided with a plurality of second ribs. Alternatively, a plurality of second reinforcing ribs are arranged at intervals and extend in the axial direction of the sleeve 1, which is not limited herein.
In this embodiment, as shown in fig. 1, a slot 521 is disposed at an end of the terminal 52 extending into the inner cavity 11, and an end of the cable 2 located in the inner cavity 11 is inserted into the slot 521. It can be understood that, by providing the slot 521 at one end of the post 52, the opening and the extending direction of the slot 521 are made to coincide with the length direction of the post 52, thereby improving the convenience and stability of the connection of the cable 2 with the post 52.
It can be understood that when the post 52 is inserted into the through hole 511 of the top cover 51, the outer wall of the post 52 is in sealing contact with the hole wall of the through hole 511, or is in sealing connection with the through hole by a sealing ring, so as to further improve the sealing performance of the insulating cavity 13. In the present embodiment, the second flange 53 is provided with a plurality of mounting holes, and the top cover 51 is provided with a plurality of through holes corresponding to the plurality of mounting holes, so that the ferrule type cold shrink cable terminal 100 is mounted to the predetermined structure, and bolts or screws are connected to the predetermined structure through the through holes of the top cover 51 and the mounting holes of the second flange 53. The predetermined structure may be a mounting rack or other devices, which are not limited herein.
In an embodiment, as shown in fig. 1, the second connection assembly 5 further includes a pressing cover 55 and a fastening ring 56, wherein the pressing cover 55 is disposed at an end of the terminal 52 away from the cable 2 and connected to the top cover 51, and the fastening ring 56 is disposed on the terminal 52 and connected to the pressing cover 55.
It can be understood that, by providing the pressing cover 55 and the clamping ring 56, the connection stability of the terminal 52 and the top cover 51 is further improved by the cooperation of the pressing cover 55 and the clamping ring 56, and the sealing performance between the outer wall of the terminal 52 and the wall of the through hole 511 is further improved by the pressing cover 55 and the clamping ring 56.
In an embodiment, as shown in fig. 1, the porcelain bushing type cold shrink cable terminal 100 further includes a shielding cover 7 and a terminal 8, the shielding cover 7 covers a side of the top cover 51 facing away from the sleeve 1 and encloses with the top cover 51 to form a shielding cavity 71, the shielding cover 7 is provided with a through hole 72 communicating with the shielding cavity 71, an end of the terminal 52 away from the cable 2 penetrates through the shielding cavity 71 and the through hole 72 and is connected with the terminal 8, the pressing cover 55 and the tightening ring 56 are accommodated in the shielding cavity 71, and the tightening ring 56 is located on a side of the pressing cover 55 facing away from the top cover 51.
In the present embodiment, by providing the shield case 7, the potentials of the post 52, the pressing cover 55, and the caulking ring 56 can be effectively shielded by the shield case 7. It can be understood that the shielding cover 7 is disposed in a U shape, so that the shielding cover 7 covers a side of the top cover 51 facing away from the sleeve 1 and encloses with the top cover 51 to form a shielding cavity 71, so that the pressing cover 55 and the fastening ring 56 can be conveniently accommodated in the shielding cavity 71, and the fastening ring 56 is located on a side of the pressing cover 55 facing away from the top cover 51.
It can be understood that, by providing the through hole 72 communicating with the shielding cavity 71 in the shielding case 7, one end of the terminal post 52 far away from the cable 2 can pass through the shielding cavity 71 and the through hole 72 and be connected with the terminal 8, so that the cable 2 can be electrically conducted with the terminal 8 through the terminal post 52. Optionally, the terminal 8 is a hardware.
The porcelain bushing type cold-contraction cable terminal 100 can be applied to the field of laying and installing of electric railway cable transmission lines, so that the porcelain bushing type cold-contraction cable terminal 100 adopts the sleeve 1 with a porcelain bushing structure and the liquid insulating filler as insulating agents to form a porcelain bushing type liquid porcelain bushing type cold-contraction cable terminal, and the porcelain bushing type liquid porcelain bushing type cold-contraction cable terminal is utilized in the electric railway 27.5kV voltage class. This porcelain bushing formula shrinkage cable termination 100 adopts high mechanical strength's porcelain bushing formula sleeve 1 can avoid the sand blown by the wind, the destruction of environmental factor to cable accessories corrodes, promotes cable accessories's reliability, stability, and the sleeve 1 outer insulation of avoiding electric locomotive cable accessories simultaneously effectively avoids receiving destruction and causing electrical fault at the high-speed collision of suspended particles and the sand and stone that raises in the in-process and the air of traveling, so can improve cable accessories terminal life. The liquid insulating filler is used as an insulating agent, so that gaps among liquid insulating parts can be effectively filled, the operational reliability of cable accessories is improved, and the creepage phenomenon of the outer wall of the sleeve 1 is reduced by expanding the space in the cavity.
The porcelain bushing type cold-shrinkable cable terminal 100 can be applied to 27.5kV cables and is mainly suitable for electric locomotives in rail railway traffic or other power transmission lines for railway rail traffic products, and the porcelain bushing sleeve 1 has stronger corrosion resistance and can ensure the safety of the cables in severe environment compared with cold-shrinkable and heat-shrinkable terminals.
The utility model also provides a cable transmission line system which comprises a cable and the porcelain bushing type cold-shrink cable terminal 100, wherein at least one end of the cable 2 of the porcelain bushing type cold-shrink cable terminal 100 is connected with the cable. The specific structure of the porcelain-sleeve cold-shrink cable terminal 100 refers to the foregoing embodiments, and since the cable transmission line system adopts all technical solutions of all the foregoing embodiments, all beneficial effects brought by the technical solutions of the foregoing embodiments are at least achieved, and are not repeated herein.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The utility model provides a porcelain bushing formula shrinkage cable termination, its characterized in that, porcelain bushing formula shrinkage cable termination includes:
the sleeve is provided with an inner cavity;
the cable penetrates through the inner cavity and is enclosed with the cavity wall of the sleeve to form an insulating cavity;
the insulating filler is filled in the insulating cavity and is liquid; and
the sealing structure comprises a first connecting assembly and a second connecting assembly which are arranged at two ends of the sleeve, and the first connecting assembly and the second connecting assembly are respectively connected with the cable.
2. The ferrule-type cold shrink cable termination of claim 1, wherein the first connection assembly comprises:
the base is arranged at one end, far away from the second connecting component, of the sleeve, the base is provided with a wire passing hole communicated with the inner cavity, and the cable penetrates through the wire passing hole;
the first flange is sleeved on the outer wall of the sleeve and is connected with the base; and
the insulator is arranged on one side, back to the first flange, of the base.
3. A porcelain sleeve type cold shrink cable termination according to claim 2, wherein said second connecting member comprises:
the top cover is arranged at one end of the sleeve, which is far away from the base, and is provided with a through hole communicated with the inner cavity;
one end of the binding post penetrates through the through hole to extend into the inner cavity and is connected with the cable; and
and the second flange is sleeved on the outer wall of the sleeve and is connected with the top cover.
4. A porcelain sleeve type cold shrink cable termination according to claim 3, wherein said second connecting assembly further comprises:
the gland is arranged at one end of the binding post, which is far away from the cable, and is connected with the top cover; and
the tight ring is sleeved on the wiring terminal and is connected with the gland.
5. The porcelain bushing type cold-shrink cable terminal according to claim 4, further comprising a shielding cover and a terminal, wherein the shielding cover covers a side of the top cover facing away from the sleeve and encloses with the top cover to form a shielding cavity, the shielding cover is provided with a through hole communicating with the shielding cavity, one end of the wiring terminal far away from the cable penetrates through the shielding cavity and the through hole and is connected with the terminal, the gland and the tightening ring are accommodated in the shielding cavity, and the tightening ring is located on a side of the gland facing away from the top cover.
6. The porcelain sleeve type cold shrink cable terminal as set forth in claim 5, wherein said terminal is a fitting;
and/or a plurality of first reinforcing ribs are arranged on the outer wall of the first flange;
and/or a plurality of second reinforcing ribs are arranged on the outer wall of the second flange;
and/or a first sealing ring is clamped between the sleeve and the base;
and/or a second sealing ring is clamped between the sleeve and the top cover;
and/or a slot is arranged at one end of the binding post extending into the inner cavity, and one end of the cable positioned in the inner cavity is inserted into the slot;
and/or the porcelain sleeve type cold-contraction cable terminal also comprises a ground wire, and one end of the ground wire is connected with the base;
and/or, the base dorsad one side of the sleeve is also provided with a sheath surrounding the wire passing hole, the sheath is sleeved on the outer wall of the cable and tightly attached to the outer wall of the cable, the porcelain bushing type cold-shrink cable terminal further comprises a cold-shrink pipe, and the cold-shrink pipe is sleeved on the outer wall of the sheath.
7. A porcelain bushing type cold-shrink cable terminal as claimed in any one of claims 1 to 6, wherein the porcelain bushing type cold-shrink cable terminal further comprises a stress cone disposed in the insulating cavity, the stress cone is sleeved on the outer wall of the cable and closely attached to the outer wall of the cable, and the outer wall of the stress cone is spaced from the inner wall of the inner cavity.
8. A porcelain sleeve type cold shrink cable terminal as claimed in any one of claims 1 to 6 wherein said liquid insulating filler is silicone oil or polyisobutylene.
9. A porcelain sleeve type cold shrink cable terminal as claimed in any one of claims 1 to 6 wherein said sleeve is a porcelain sleeve, and the outer wall of said sleeve is provided with a plurality of sheds which are spaced apart from each other on the outer wall of said sleeve.
10. An electric cable transmission line system, characterized by comprising a cable and the porcelain type cold-shrink cable terminal according to any one of claims 1 to 9, wherein at least one end of the cable of the porcelain type cold-shrink cable terminal is connected with the cable.
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| CN202121316467.9U CN215498214U (en) | 2021-06-11 | 2021-06-11 | Porcelain bushing type cold-shrinkage cable terminal and cable transmission line system |
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| CN202121316467.9U CN215498214U (en) | 2021-06-11 | 2021-06-11 | Porcelain bushing type cold-shrinkage cable terminal and cable transmission line system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119252720A (en) * | 2024-11-22 | 2025-01-03 | 河北华能源电力设备有限公司 | A closed ejection fuse |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119252720A (en) * | 2024-11-22 | 2025-01-03 | 河北华能源电力设备有限公司 | A closed ejection fuse |
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