CN108711809B

CN108711809B - Length-adjustable common-box enclosed bus

Info

Publication number: CN108711809B
Application number: CN201810578848.0A
Authority: CN
Inventors: 黄雪冰
Original assignee: Huzhou For Electrical Technology Co Ltd
Current assignee: Huzhou For Electrical Technology Co Ltd
Priority date: 2018-06-07
Filing date: 2018-06-07
Publication date: 2020-02-11
Anticipated expiration: 2038-06-07
Also published as: CN108711809A

Abstract

The invention discloses a length-adjustable common-box enclosed bus, which comprises a protective shell (10) with a rectangular cross section, wherein supporting insulators (20) are arranged in the protective shell (10) at intervals, and bus conductors (30) arranged along the length direction of the protective shell (10) are arranged on the supporting insulators (20); the protective shell (10) comprises an inner shell (40), an outer shell (50) is sleeved outside one end of the inner shell (40), and a shell (41) for coating the outer shell (50) is further arranged on the outer surface of the inner shell (40); the inner surface of the outer shell (50) is provided with a first arch sheet (51) contacted with the outer surface of the inner shell (40), and the inner surface of the shell (41) is provided with a second arch sheet (42) contacted with the outer surface of the outer shell (50). The invention has the characteristics of adjustable length, convenient adjustment and long service life.

Description

Length-adjustable common-box enclosed bus

Technical Field

The invention relates to a closed bus, in particular to a common-box closed bus with adjustable length.

Background

The enclosed bus is a bus system consisting of a metallic shielding and protecting shell, a conductive bar, an insulating material and related accessories. The enclosed bus mainly comprises an isolated phase enclosed bus, a common box enclosed bus, a cable bus and a lead wire which is widely used for power plants, substations, industrial and civil power supplies. The closed bus is usually equipped with a micro-positive pressure device, namely compressed air is filled into the closed bus shell after being filtered, dewatered and dried, so that the air pressure in the closed bus shell is always kept in a micro-positive pressure state, and external moisture, impurities and the like are prevented from entering, so that the insulator is wetted. The closed bus is often subjected to error of a civil foundation in field installation and operation, so that the bus generates deviation in the length direction, and the size of a shell needs to be adjusted. The existing enclosed bus is mostly solved by additionally arranging an elastic connecting piece made of rubber on a shell piece. But because the rubber material is easy to age, and the bus can generate heat in operation, the environment is heated, the aging speed is increased, and the elastic connecting piece needs to be continuously replaced. If a layer of shell is sleeved on the outer surface of the shell, the problems that the friction is too large, the adjustment is difficult and the sealing performance is reduced are easily caused. Therefore, designing a common-box enclosed bus with adjustable length is a problem that is continuously solved by technicians in the industry.

Disclosure of Invention

The invention aims to provide a length-adjustable common-box enclosed busbar. The invention has the characteristics of adjustable length, convenient adjustment and long service life.

The technical scheme of the invention is as follows: the length-adjustable common-box enclosed bus comprises a protective shell with a rectangular cross section, wherein supporting insulators are arranged in the protective shell at intervals, and bus conductors arranged along the length direction of the protective shell are arranged on the supporting insulators; the protective shell comprises an inner shell, an outer shell is sleeved outside one end of the inner shell, and a shell for covering the outer shell is further arranged on the outer surface of the inner shell; the inner surface of the outer shell is provided with a first arch sheet which is contacted with the outer surface of the inner shell, and the inner surface of the shell is provided with a second arch sheet which is contacted with the outer surface of the outer shell.

In the length-adjustable common-box enclosed bus, the casing is provided with an air outlet, and the air outlet is provided with a one-way air outlet valve.

In the length-adjustable common-box enclosed busbar, the number of the first arch pieces is at least 2.

In the length-adjustable common-box enclosed bus, the end face of the outer shell sleeved at one end of the inner shell is provided with an outward-turned folded edge.

In the length-adjustable common-box enclosed bus, the casing has an L-shaped cross section, and a rib plate is disposed on one side of the casing, which is fixed to the inner shell.

In the length-adjustable common-box enclosed bus, a window is arranged on the inner shell or the outer shell.

Compared with the prior art, the invention realizes the sliding between the shells through the nested structure of two clamps and one clamp, thereby achieving the purpose of length adjustment. The air flow path formed by the structure is tortuous, and the sealing performance of the outer shell is effectively ensured. Meanwhile, the whole shell is made of metal materials, and rubber materials which are easy to age are not adopted, so that the service life of the whole shell is longer, and the shell does not need to be replaced frequently. Between inner shell and the shell to and all be the line contact through the hunch piece between shell and the cover shell, this kind of structure area of contact is little on the one hand, easily slides, and on the other hand the deformation of hunch piece can make between the three inseparabler firm, has guaranteed the leakproofness of casing.

Moreover, a one-way air outlet valve is arranged on the casing. Because the atmospheric pressure in the casing is greater than outside atmospheric pressure all the time, consequently also there is the condition of pressure-fired between the cover shell, and one-way air outlet valve has guaranteed that the air current between the cover shell outwards circulates and smooth and easy, is difficult to the deposition, makes length adjustment's resistance can not increase.

Furthermore, the shell is of an L-shaped structure and is provided with a rib plate. The structure is easy to process and install, and the rib plates increase the structural strength of the structure.

Furthermore, the inner shell or the outer shell is provided with a window, and the window provides convenience for installation and detection of the bus conductor.

In conclusion, the adjustable type adjustable lifting device has the characteristics of adjustable length, convenience in adjustment and long service life. In addition, the invention also has the characteristics of high structural strength and convenient operation.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a side schematic view of the housing of the present invention;

fig. 3 is a partially enlarged view of fig. 2.

Reference numerals: 10-protective shell, 20-supporting insulator, 30-bus conductor, 40-inner shell, 41-casing, 42-second arch piece, 43-air outlet, 44-one-way air outlet valve, 45-rib plate, 46-window, 50-outer shell, 51-first arch piece and 52-folded edge.

Detailed Description

The present invention is further illustrated by the following examples, which are not to be construed as limiting the invention.

Example (b): the length-adjustable common-box enclosed bus comprises a protective shell 10 with a rectangular cross section, supporting insulators 20 are arranged in the protective shell 10 at intervals, and bus conductors 30 arranged along the length direction of the protective shell 10 are arranged on the supporting insulators 20, as shown in fig. 1 to 3; the protective shell 10 comprises an inner shell 40, an outer shell 50 is sleeved outside one end of the inner shell 40, and a sleeve 41 for covering the outer shell 50 is further arranged on the outer surface of the inner shell 40; the inner surface of the outer shell 50 is provided with at least two first arch sheets 51 which are contacted with the outer surface of the inner shell 40, and the inner surface of the shell 41 is provided with a second arch sheet 42 which is contacted with the outer surface of the outer shell 50. Flanges are provided on the end faces of the inner and

outer shells

40 and 50 to be connected to the outside.

An air outlet 43 is arranged on the casing 41, and a one-way air outlet valve 44 is arranged on the air outlet 43. The end surface of the outer shell 50 sleeved on one end of the inner shell 40 is provided with an outward turned folding edge 52 for limiting the outer shell 50. The section of the shell 41 is L-shaped, and a rib plate 45 is arranged on one side of the shell 41 fixed with the inner shell 40. The inner shell 40 or the outer shell 50 is provided with a window 46.

The working principle is as follows:

the invention realizes the sliding between the shells 50 through a nested structure of two-in-one, and the length is adjusted. The air flow path of this structure is tortuous, effectively ensuring the tightness of the body of the casing 50. Meanwhile, the shell 50 is made of metal materials instead of rubber materials which are easy to age, so that the service life of the whole shell is longer and the shell does not need to be replaced frequently. The line contact between the inner shell 40 and the outer shell 50 and between the outer shell 50 and the casing 41 are all through the arch sheet, on one hand, the contact area of the structure is small, the sliding is easy, on the other hand, the deformation of the arch sheet can enable the three to be more compact and firm, and the sealing performance of the shell is guaranteed. And the first dome 51 is not less than 2 pieces, thereby securing stability of the sliding connection.

The height of the insulator fixed in the inner shell and the outer shell is different, and the length adjusting area is avoided.

Because the air pressure in the shell is always greater than the external air pressure, the micro-positive pressure condition also exists between the casing 41, and the one-way air outlet valve 44 ensures that the air flow between the casing 41 flows outwards and is smooth, dust is not easy to accumulate, and the resistance of length adjustment cannot be increased.

The housing 41 has an L-shaped structure and is provided with ribs 45. This construction is easy to manufacture and install, and the ribs 45 add structural strength.

A window 46 is provided in either the inner shell 40 or the outer shell 50, and the window 46 facilitates installation and testing of the bus bar conductor 30.

Claims

1. The total-box enclosed bus with adjustable length is characterized in that: the protective shell comprises a protective shell (10) with a rectangular cross section, wherein supporting insulators (20) are arranged in the protective shell (10) at intervals, and bus conductors (30) arranged along the length direction of the protective shell (10) are arranged on the supporting insulators (20); the protective shell (10) comprises an inner shell (40), an outer shell (50) is sleeved outside one end of the inner shell (40), and a shell (41) for coating the outer shell (50) is further arranged on the outer surface of the inner shell (40); the inner surface of the outer shell (50) is provided with a first arch sheet (51) contacted with the outer surface of the inner shell (40), and the inner surface of the shell (41) is provided with a second arch sheet (42) contacted with the outer surface of the outer shell (50); the number of the first arch pieces (51) is at least 2; the end surface of the outer shell (50) sleeved at one end of the inner shell (40) is provided with an outward turned folding edge (52).

2. A length adjustable common box enclosed busbar according to claim 1, wherein: the casing (41) is provided with an air outlet (43), and the air outlet (43) is provided with a one-way air outlet valve (44).

3. A length adjustable common box enclosed busbar according to claim 1, wherein: the cross section of the shell (41) is L-shaped, and a rib plate (45) is arranged on one side of the shell (41) fixed with the inner shell (40).

4. A length adjustable common box enclosed busbar according to claim 1, wherein: the inner shell (40) or the outer shell (50) is provided with a window (46).