CN110676779B - Wall bushing - Google Patents
Wall bushing Download PDFInfo
- Publication number
- CN110676779B CN110676779B CN201910809532.2A CN201910809532A CN110676779B CN 110676779 B CN110676779 B CN 110676779B CN 201910809532 A CN201910809532 A CN 201910809532A CN 110676779 B CN110676779 B CN 110676779B
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- Prior art keywords
- corrugated pipe
- central conductor
- end cover
- cylinder body
- elastic
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- 239000004020 conductor Substances 0.000 claims abstract description 99
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 239000002923 metal particle Substances 0.000 abstract description 5
- 238000007665 sagging Methods 0.000 abstract description 3
- 238000009413 insulation Methods 0.000 abstract description 2
- 239000012212 insulator Substances 0.000 description 9
- 230000009286 beneficial effect Effects 0.000 description 8
- 230000007704 transition Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/22—Installations of cables or lines through walls, floors or ceilings, e.g. into buildings
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Insulators (AREA)
Abstract
The invention relates to the technical field of wall-through conductive connecting devices, and provides a wall-through sleeve, which comprises a cylinder body and a central conductor, wherein one end of the central conductor is fixed with a cylinder body end cover arranged at the corresponding end of the cylinder body, the other end of the cylinder body is fixedly connected with an elastic corrugated pipe, one end of the elastic corrugated pipe, which is far away from the cylinder body, is provided with a corrugated pipe end cover, the other end of the central conductor is fixed with the corrugated pipe end cover, and the elastic corrugated pipe provides tension force for the central conductor to keep the central conductor tensioned. When the central conductor is heated and elongated, the elastic corrugated pipe can straighten the elongated central conductor by driving the end cover of the corrugated pipe, so that the sagging condition of the central conductor is improved, and the uniform field intensity in the wall bushing is ensured; and both ends of the central conductor are fixedly connected with the corresponding end covers, so that the phenomenon that insulated metal particles are influenced due to the adoption of a sliding electric connection structure is avoided, the insulation safety is ensured, and the wall bushing has higher reliability.
Description
Technical Field
The invention relates to the technical field of wall-through conductive connecting devices, in particular to a wall-through sleeve.
Background
The wall bushing can be connected with conductors on two sides of a wall body, and is widely applied to electric power engineering. Patent document No. CN207977696U, publication No. 2018.10.16 discloses a wall bushing, which includes a first transportation unit and a second transportation unit located at two sides of a wall body in an operating state, where the first transportation unit includes a first bushing, a first bushing center conductor and a first basin-type insulator contact, and the second transportation unit includes a basin-type insulator, a second bushing center conductor and a second basin-type insulator contact.
The first sleeve is connected with the second sleeve through the first basin-type insulator, and the first sleeve central conductor and the second sleeve central conductor are respectively connected with the first basin-type insulator contact and the second basin-type insulator contact and further connected with the first basin-type insulator. The first basin insulator can support a first bushing center conductor and a second bushing center conductor in the bushing.
The problems in the wall bushing are: when the central conductor is heated and extended, the central conductor is extended to sag due to the fact that the length of the central conductor is increased, the deflection of the central conductor is increased, namely the distance between the outer peripheral surface of the central conductor and the sleeve is unequal, the field intensity of the central conductor in the wall bushing is concentrated, and the reliability of the wall bushing is reduced; and when the central conductor expands with heat and contracts with cold, metal particles are easily generated at the part of the end part of the central conductor, which is in splicing fit with the basin-type insulator, due to relative sliding, and the metal particles float in the cylinder body and can directly influence the insulation of the wall bushing.
Disclosure of Invention
The invention aims to provide a wall bushing, which can solve the problem of poor reliability of the wall bushing in the prior art.
In order to achieve the purpose, the wall bushing adopts the following technical scheme:
the wall bushing comprises a cylinder body and a central conductor, wherein one end of the central conductor is fixed with a cylinder body end cover arranged at the corresponding end of the cylinder body, the other end of the cylinder body is fixedly connected with an elastic corrugated pipe, a corrugated pipe end cover is arranged at one end, far away from the cylinder body, of the elastic corrugated pipe, the other end of the central conductor is fixed with the corrugated pipe end cover, and the elastic corrugated pipe provides tension force for the central conductor to keep the central conductor tensioned.
The beneficial effects are that: one end of the central conductor is fixed with the end cover of the cylinder body, the other end of the central conductor is connected with the end cover of the corrugated pipe, the elastic corrugated pipe can enable the central conductor to be tensioned and tensioned through self deformation, the central conductor is ensured to be in a stretched tensioned state all the time, when the central conductor is heated and stretched, the elastic corrugated pipe can drive the end cover of the corrugated pipe to straighten the stretched central conductor, the sagging condition of the central conductor is improved, and the uniform field intensity in the wall bushing is ensured; and both ends of the central conductor are fixedly connected with the corresponding end covers, so that when the central conductor moves due to expansion with heat and contraction with cold, metal particles influencing the insulating property in the cylinder body cannot be generated due to relative sliding, the insulating safety of the wall bushing is ensured, and the wall bushing has higher reliability.
Further, the center conductor is detachably fixed with the end cover of the corrugated pipe.
The beneficial effects are that: center conductor and bellows end cover releasable connection, the operating personnel of being convenient for carries out the dismouting to center conductor.
Furthermore, the central conductor penetrates out of the corrugated pipe end cover and is fixed with the corrugated pipe end cover through a clamping ring; the rand is blocked on the central conductor and is fixedly connected with the end cover of the corrugated pipe through a fastener.
The beneficial effects are that: the clamping ring is used for fixedly connecting the central conductor with the corrugated pipe end cover, the structure is simple, a reliable matching surface is arranged between the clamping ring and the corrugated pipe end cover, and the connecting structure is stable.
Furthermore, the clamping ring is of a split structure and is formed by splicing at least two pieces.
The beneficial effects are that: the rand is split type structure, and the operating personnel of being convenient for blocks the rand on central conductor.
Further, the thickness of the portion of the collar that engages the fastener is greater than the thickness of the portion that engages the center conductor.
The beneficial effects are that: the thickness of the part, matched with the fastener, of the clamping ring is larger than that of the part, matched with the central conductor, of the clamping ring, so that the connection strength of the clamping ring and the end cover of the corrugated pipe can be improved, and the connection stability is ensured.
Further, the center conductor penetrates out of the end cover of the corrugated pipe to form a connecting end used for being connected with the corresponding conductor.
The beneficial effects are that: the center conductor penetrates out of the end cover of the corrugated pipe, so that an operator can conveniently connect the wall bushing with other conductors.
Furthermore, the outer end of the elastic corrugated pipe is provided with a flange plate, the right end of the cylinder body close to the elastic corrugated pipe is provided with a corresponding flange plate, and a pull rod is arranged between the flange plate of the elastic corrugated pipe and the flange plate of the cylinder body and used for pre-compressing the elastic corrugated pipe.
The beneficial effects are that: the elastic corrugated pipe is pre-compressed by using the pull rod, the tension is provided for the central conductor by using the elastic force of the elastic corrugated pipe for restoring deformation, the structure is simple, and the realization is convenient.
Further, the central conductor is of an integrated structure.
The beneficial effects are that: the central conductor is of an integrated structure, a sliding electric connection structure of transition insertion is cancelled, and metal particles generated due to sliding are further avoided.
Drawings
FIG. 1 is a schematic structural view of a wall bushing according to the present invention;
FIG. 2 is a schematic view of the right side of the wall bushing of the present invention;
FIG. 3 is a front view of the collar of the present invention;
FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;
in the figure: 10-a cylinder body; 11-left cylinder; 12-right barrel; 13-a transition cylinder; 14-bellows end cap; 15-cylinder end cover; 16-a wall body; 20-a center conductor; 30-an elastic bellows; 31-a flange plate; 40-expansion joint; 41-a spring cartridge; 42-a pull rod; 43-left side lock nut; 44-right locking nut; 50-a collar; 51-fastener piercing; 52-positioning projection.
Detailed Description
The present invention will now be described with reference to the accompanying drawings.
As shown in fig. 1, an embodiment of the wall bushing of the present invention is shown: the wall bushing comprises a cylinder body 10, the cylinder body 10 extends along the left and right directions shown in figure 1, the cylinder body 10 is of a split structure and comprises a transition cylinder body 13 penetrating through a wall body 16, and a right cylinder body 12 and a left cylinder body 11 which are connected to two ends of the transition cylinder body 13 through flanges respectively. The wall bushing further comprises a center conductor 20 arranged in the cylinder 10, and the center conductor 20 is of an integrated structure. The opening of the left barrel 11 is provided with a barrel end cover 15, the barrel end cover 15 is in flange connection with the opening of the left barrel 11 through bolts so as to seal the barrel 10, the opening of the right barrel 12 is connected with an elastic corrugated pipe 30, one end of the elastic corrugated pipe 30, which is close to the barrel, is provided with a flange 31, and the flange is in flange connection with the opening of the right barrel 12 through bolts. One end of the elastic corrugated pipe 30, which is far away from the cylinder body, is connected with a corrugated pipe end cover 14 for plugging the corrugated pipe opening, and when the elastic corrugated pipe 30 is connected with the right cylinder body 12, the corrugated pipe end cover 14 and the cylinder body end cover 15 can be matched with the cylinder body 10 to form a relatively closed environment inside the cylinder body.
As shown in fig. 2 and 3, the bellows end cap 14 is provided with a through hole through which the center conductor 20 passes, and the end of the center conductor 20 corresponding to the right side passes through the bellows end cap 14 during assembly, and the end corresponding to the left side is directly fixed to the inner side surface of the cylinder end cap 15. A collar 50 for fixedly connecting the central conductor 20 and the end cap 14 is clamped on the portion of the central conductor 20 penetrating through the cylinder 10, the collar 50 is a split structure and comprises two half rings which are combined to form a ring body, as shown in fig. 4, a positioning protrusion 52 extending along the radial direction of the central conductor 20 when in use is arranged on the inner edge surface of each half ring, a ring groove serving as a positioning recess is arranged on the central conductor 20, and each half ring is embedded into the ring groove through the positioning protrusion 52 to realize relative fixation with the central conductor 20. Each half ring is also provided with a fastener through hole 51, a blind hole corresponding to the fastener through hole 51 is correspondingly arranged on the corrugated pipe end cover 14, the half ring is fixedly connected with the corrugated pipe end cover 14 through a bolt, and at the moment, the positioning bulge 52 presses against the groove wall of the ring groove to ensure that the central conductor 20 and the corrugated pipe end cover 14 keep a stable connection relationship. And the thickness of the part of the collar 50 which is matched with the fastener is larger than that of the part which is matched with the central conductor, the length of the fastener through hole 51 is intuitively longer than that of the positioning bulge 52, and the collar 50 has a thicker part to be fixedly connected with the end cover 14 of the corrugated pipe, so that higher connection stability can be maintained.
A plurality of expansion joints 40 arranged at intervals along the circumferential direction of the corrugated pipe are arranged between the flange 31 of the elastic corrugated pipe 30 and the end cover 14 of the corrugated pipe, and each expansion joint 40 comprises a spring cylinder 41 fixed on the flange 31 and a pull rod 42 with the left end penetrating into the spring cylinder 41 and the right end connected with the end cover 14 of the corrugated pipe. The rod body of the pull rod 42 in the spring cylinder 41 is provided with a flange, a disc spring set is arranged between the flange and the right cylinder wall in the spring cylinder 41, and the disc spring set can be compressed when the pull rod 42 extends out of the spring cylinder 41. The rod body of the pull rod 42 matched with the end cover 14 of the corrugated pipe is provided with a threaded section, the threaded section is in threaded connection with locking nuts positioned on two sides of the end cover 14 of the corrugated pipe, the locking nuts can limit the relative positions of the pull rod 42 and the end cover 14 of the corrugated pipe, and due to the fact that the spring barrel 41 is fixedly connected with the flange plate 31 of the elastic corrugated pipe 30, when a technician adjusts the position of the locking nuts relative to the pull rod, the extending length of the pull rod 42 and the elastic force generated by the disc spring set can be changed.
Before the central conductor 20 is fixed to the end cap 14 of the corrugated tube, an operator adjusts the lock nut to make the length of the pull rod 42 extending out of the spring tube 41 longer, at this time, the disc spring set is compressed to generate an elastic force for driving the pull rod 42 to retract into the spring tube 41, and the pull rod 42 is limited by the right lock nut 44 and cannot move relative to the end cap 14 of the corrugated tube, so the disc spring set generates an acting force for driving the pull rod 42 to drive the end cap 14 of the corrugated tube to move towards the flange 31, the distance between the end cap 14 of the corrugated tube and the flange 31 is reduced, and the elastic corrugated tube 30 is compressed. Then, the operator connects the center conductor 20 to the pre-compressed elastic bellows 30 through the collar 50, when the right lock nut 44 on the pull rod 42 is loosened or the spring barrel 41 is directly removed, the elastic force generated by the elastic bellows 30 recovering the deformation can drive the end portion of the center conductor 20 corresponding to the right side away from the end portion corresponding to the left side, and the center conductor 20 is tensioned in the cylinder 10 by the pulling force of the elastic bellows 30, so that the sagging problem caused by the self-heating elongation of the center conductor 20 is avoided.
When the wall bushing is used, the left end of the wall bushing is positioned outdoors after penetrating through a wall, and the right end of the wall bushing is positioned indoors due to the arrangement of the elastic corrugated pipe, so that the protection requirement is high; or the wall bushing is wholly positioned indoors, and the two adjacent spaces can be subjected to conductive switching through self wall bushing.
In other embodiments, the central conductor may not pass through the cylinder, and the end of the central conductor may be welded to the end cap of the corrugated pipe, or a flange is disposed on the central conductor and fixedly connected to the end cap of the corrugated pipe through the flange, and an adapter for communicating the central conductor with the external conductor should be disposed on the end cap of the corrugated pipe, without being limited to the above embodiment in which the central conductor is fixed to the end cap of the corrugated pipe through a collar.
In other embodiments, the connection structure between the collar and the center conductor may take other forms, such as providing an internal thread on the inner edge surface of the collar and an external thread on the outer circumferential surface of the center conductor, securing the collar to the center conductor by a threaded connection, and adjusting the axial position of the collar on the center conductor by a threaded connection.
In other embodiments, the expansion joint disposed between the flange and the end cap of the bellows may be replaced by a pull screw, one end of the pull screw is fixedly connected to the flange, the other end of the pull screw passes through the end cap of the bellows and limits the relative displacement between the flange and the end cap of the bellows by a locking nut, and at this time, the bellows with elastic deformation capability is squeezed by the flange and the end cap of the bellows at both sides to be in a pre-compression state.
In other embodiments, the center conductor may be assembled in the barrel by inserting the segmented conductors, and the two ends of the combined center conductor still need to be fixedly connected with the end caps of the corresponding ends.
The above-mentioned embodiments, the objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (3)
1. Wall bushing, including barrel and central conductor, the barrel end cover that one end and the corresponding end of barrel of central conductor were established is fixed together, its characterized in that:
the other end of the cylinder body is fixedly connected with an elastic corrugated pipe, one end of the elastic corrugated pipe, which is far away from the cylinder body, is provided with a corrugated pipe end cover, the other end of the central conductor is fixed with the corrugated pipe end cover, and the elastic corrugated pipe provides tension force for the central conductor to keep the central conductor tensioned;
the central conductor and the end cover of the corrugated pipe are detachably fixed together;
the central conductor penetrates out of the corrugated pipe end cover and is fixed with the outer side of the corrugated pipe end cover through a clamping ring; the clamping ring is clamped on the central conductor and is fixedly connected with the end cover of the corrugated pipe through a fastener;
the clamping ring is of a split structure and is formed by splicing at least two pieces;
the inner edge surface of each valve of the clamping ring is provided with a positioning bulge which extends along the radial direction of the central conductor when in use, the part of the central conductor positioned outside the end cover of the corrugated pipe is provided with a ring groove used as a positioning recess, and each valve of the clamping ring is embedded into the ring groove through the positioning bulge to realize the relative fixation with the central conductor;
the central conductor is of an integrated structure;
the end part of the central conductor penetrating out of the end cover of the corrugated pipe forms a connecting end used for being connected with a corresponding conductor;
the corrugated pipe end cover and the cylinder body end cover are matched with the cylinder body to form a relatively closed environment inside the cylinder body.
2. A wall bushing according to claim 1, wherein: the thickness of the portion of the collar that engages the fastener is greater than the thickness of the portion that engages the center conductor.
3. A wall bushing according to claim 1 or 2, wherein: the outer end of the elastic corrugated pipe is provided with a flange plate, the right end of the barrel body, which is close to the elastic corrugated pipe, is provided with a corresponding flange plate, and a pull rod is arranged between the flange plate of the elastic corrugated pipe and the flange plate of the barrel body and used for pre-compressing the elastic corrugated pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910809532.2A CN110676779B (en) | 2019-08-29 | 2019-08-29 | Wall bushing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910809532.2A CN110676779B (en) | 2019-08-29 | 2019-08-29 | Wall bushing |
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| Publication Number | Publication Date |
|---|---|
| CN110676779A CN110676779A (en) | 2020-01-10 |
| CN110676779B true CN110676779B (en) | 2021-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910809532.2A Active CN110676779B (en) | 2019-08-29 | 2019-08-29 | Wall bushing |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112066134A (en) * | 2020-08-28 | 2020-12-11 | 安徽威迈光机电科技有限公司 | Compensator assembly device for energy accumulator |
| CN112302423B (en) * | 2020-10-30 | 2023-06-09 | 广州朗国电子科技股份有限公司 | Door lock fixing structure free of plug wire |
| CN112670923B (en) * | 2020-12-08 | 2022-09-30 | 平高集团有限公司 | Wall bushing |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4107456A (en) * | 1976-09-27 | 1978-08-15 | General Electric Company | Electrical penetration assembly |
| CN105119217B (en) * | 2015-09-23 | 2018-01-02 | 上海润京能源科技有限公司 | High-voltage wall bushing |
| CN105977887B (en) * | 2016-06-01 | 2018-10-23 | 中国西电电气股份有限公司 | A kind of inflatable ultrahigh voltage direct current wall bushing |
| US10145494B2 (en) * | 2016-11-18 | 2018-12-04 | Hilti Aktiengesellschaft | Air, acoustic and/or fire sealing device |
| CN206506243U (en) * | 2017-02-17 | 2017-09-19 | 临邑县光明电力服务有限责任公司 | A kind of high-tension bus-bar wall bushing being easily installed |
| CN107887865B (en) * | 2017-09-22 | 2019-08-02 | 平高集团有限公司 | A kind of New type through-wall sleeve component |
| CN107872037B (en) * | 2017-09-22 | 2019-08-02 | 平高集团有限公司 | A kind of wall bushing component elastic support unit |
| CN207977696U (en) * | 2018-03-27 | 2018-10-16 | 西安西电开关电气有限公司 | A kind of exchange wall bushing of Mixed gas insulation shape metallic leak-proof structure |
| CN110165479A (en) * | 2019-04-24 | 2019-08-23 | 平高集团有限公司 | Conductive joint element for bar and wall bushing with the connector |
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2019
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