CN216774241U

CN216774241U - Sealing connection structure for mounting current transformer on enclosed bus

Info

Publication number: CN216774241U
Application number: CN202220308738.4U
Authority: CN
Inventors: 周自林; 云昌锋; 郭宗平; 冯国强; 张勇
Original assignee: Huaneng Yangpu Thermal Power Co Ltd
Current assignee: Huaneng Yangpu Thermal Power Co Ltd
Priority date: 2022-02-15
Filing date: 2022-02-15
Publication date: 2022-06-17
Anticipated expiration: 2032-02-15

Abstract

The utility model provides a sealed connection structure for installing a current transformer on a closed bus, which belongs to the technical field of electrical equipment installation and comprises the following components: the connecting sleeve is sleeved on the surfaces of the shells of the two adjacent closed buses; and the sealing structure is arranged between the shell of the enclosed bus and the connecting sleeve. The prior art solutions refer to that enough space is left for installing the current transformer, and although enough space is left for installing the current transformer in the bus bar housing, the prior art solutions have defects in tightness. The utility model can satisfy the requirement of leaving enough space when the current transformer is installed, and simultaneously, the utility model also satisfies the requirement of enough tightness of the device by arranging the sealing structure.

Description

Sealing connection structure for mounting current transformer on enclosed bus

Technical Field

The utility model relates to the technical field of electrical equipment installation, in particular to a sealing connection structure for installing a current transformer on a closed bus.

Background

The enclosed bus is a bus system which is composed of a metal plate as a protective shell, a conductive bar, an insulating material and related accessories. The isolated phase enclosed bus comprises an isolated phase enclosed bus, a common box (containing a common phase isolated phase) enclosed bus and a cable bus.

The closed bus is mainly used for connecting the generator of a large-scale generating set of 200MW or more than 200MW with the low-voltage side of the main transformer. According to design requirements and field installation space conditions, a current transformer for protecting and measuring the generator needs to be installed in a shell of the closed bus.

The current transformer arranged in the shell of the closed bus has larger self weight, and needs enough space to be arranged in the bus shell when the current transformer is arranged, so that the field installation and the operation and maintenance are both convenient; in the prior art, a certain gap is reserved between the enclosed buses and the enclosed buses are connected by the rubber telescopic sleeves, but the rubber telescopic sleeves are not tightly connected with the shells of the enclosed buses, so that the sealing performance between the inside of the enclosed buses and the external environment is poor.

Disclosure of Invention

Therefore, the technical problem to be solved by the utility model is to overcome the defect of insufficient sealing property when the current transformer is installed in the isolated-phase bus, and further provide a sealing connection structure for installing the current transformer on the closed bus.

The present invention provides a sealing connection structure for mounting a current transformer on a closed bus, including:

the connecting sleeve is sleeved on the surfaces of the two adjacent closed bus shells;

and the sealing structure is arranged between the shell of the enclosed bus and the connecting sleeve.

Preferably, the connecting sleeve is formed by buckling a first shell and a second shell.

Preferably, the first housing and the second housing are of a separate structure.

Preferably, the first housing and the second housing have extension plates, and the extension plates have mounting holes.

Preferably, the sealing structure includes:

the sealing element is arranged on the connecting sleeve and the bus shell in a penetrating manner;

and the sealing ring is arranged between the sealing element and the connecting sleeve.

Preferably, the surface of the seal is provided with corrugations.

Preferably, the first housing is provided with an observation window.

Preferably, a handle is arranged on the first shell.

Preferably, the method further comprises the following steps: and the current transformer is embedded in the closed bus and is fixed on the bus conductor through a fixing bolt.

Preferably, the number of the fixing bolts is at least four, and the fixing bolts are uniformly distributed on the bus casing.

The technical scheme of the utility model has the following advantages:

1. the utility model provides a surround sleeve type structure for installing a current transformer on an isolated phase enclosed bus, which comprises: the connecting sleeve is sleeved on the surfaces of the shells of the two adjacent closed buses; and the sealing structure is arranged between the closed bus shell and the connecting sleeve.

The utility model can satisfy the requirement of reserving enough space when the current transformer is installed, and simultaneously satisfies the requirement of enough tightness of the device by arranging the sealing structure.

2. The connecting sleeve is formed by buckling the first shell and the second shell and is provided with the extending plate, and the extending plate is provided with the mounting hole, so that the connecting sleeve is convenient to mount in the actual process.

3. The observation windows and the handles are arranged on the first shell, so that the internal condition of the bus can be observed between the observation windows in the later maintenance process, and the convenience in later maintenance is facilitated by arranging the handles.

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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a view showing an embodiment of a sealed connection structure of a closed bus mounted current transformer according to the present invention;

FIG. 2 is a front view of the coupling sleeve of the present invention;

FIG. 3 is a side view of the coupling sleeve of the present invention;

description of reference numerals:

1. a flexible connecting wire; 2. a housing electrical connection plate; 3. a bus bar fitting head; 4. a current transformer; 5. a bus bar; 6. a bus bar housing; 7. a connecting bolt; 8. a connecting sleeve; 9. a seal member; 10. a seal ring; 11. an observation window; 12. a handle; 13. and (5) fixing the bolt.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

The utility model provides a surround sleeve type structure for installing a current transformer on an isolated phase enclosed bus, which comprises: the connecting sleeve 8 is sleeved on the surfaces of the two adjacent closed bus shells 6; and the sealing structure is arranged between the shell of the enclosed bus and the connecting sleeve 8.

As shown in fig. 1, the current transformer 4 is arranged in the closed bus casing 6 and fixed on the bus through a fixing bolt 13; specifically, on enclosed bus shell 6, set up threaded hole, fixing bolt 13's tip passes the screw hole, with current transformer 4 butt, fixing bolt 13 sets up to a plurality ofly, carries out the butt through the angle of difference to current transformer 4 to the realization plays the effect of pressing from both sides tightly to current transformer 4, prevents that current transformer 4 from carrying out the displacement. Preferably, the number of the fixing bolts 13 is four, and the fixing bolts 13 are arranged on the housing and are uniformly distributed. In order to facilitate the access of the current transformer 4, the size of the connecting sleeve 8 can be adjusted according to the size and thickness of the current transformer 4, and enough installation and maintenance space is reserved for the current transformer 4.

The enclosed bus bar 5 includes: a first bus bar and a second bus bar; the first bus is connected with the flexible connecting line 1 and the shell electrical connecting plate 2, and the second bus is connected with the flexible connecting line 1 and the shell electrical connecting plate 2; the first bus is connected with the inside of the second bus through a flexible connection line 1, one end of the flexible connection line 1 is connected with a bus fitting head 3 of the first bus, and the other end of the flexible connection line 1 is connected with the bus fitting head 3 of the second bus. The connection position of the flexible connecting line 1 and the conductor of the bus bar 5 is generally arranged near the port of the bus bar shell 6, so that the operation is convenient for workers. Fixed set up shell electricity between first generating line and the second generating line and link board 2, first generating line shell passes through shell electricity with the second generating line shell and links board 2 and be connected, and shell electricity links board 2 can guarantee the electrical connection of enclosed bus shell 6.

A sealing element 9 and a sealing ring 10 are arranged between the connecting sleeve 8 and the housing, the surface of the sealing element 9 being provided with corrugations. Can guarantee the air tightness performance through setting up the fold, reach and guarantee 5 inside and outside complete isolations of generating line, do not influence the original pressure-fired operation of generating line 5.

As shown in fig. 2 and 3, the connecting sleeve 8 is formed by fastening a first housing and a second housing, and the first housing and the second housing are of a separate structure, which has the advantage of convenient installation in actual operation. The first shell and the second shell are provided with extension plates, mounting holes are formed in the extension plates, the first shell and the second shell are connected through mounting bolts 7 arranged in the mounting holes, electromagnetic fields are prevented from leaking due to the installation of the connecting sleeves 8, the electromagnetic shielding effect is very good, and the heat dissipation of the shell is also guaranteed. The connecting sleeve 8 and the bus shell 6 are fixed together, so that the eddy current loss of the equipment can be reduced, and the appearance is attractive. And set up observation window 11 in first casing central authorities, conveniently observe inside the generating line, still set up handle 12 in first casing both sides, make first casing can conveniently take off.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the utility model.

Claims

1. Seal bus installation current transformer's sealing connection structure, its characterized in that includes:

the connecting sleeve (8) is sleeved on the surfaces of the shells of the two adjacent closed buses;

and the sealing structure is arranged between the closed bus shell (6) and the connecting sleeve (8).

2. The hermetically sealed connection structure of a closed busbar mounted current transformer according to claim 1, wherein the connecting sleeve (8) is formed by fastening a first shell and a second shell.

3. The hermetically sealed connection structure of an enclosed busbar mounted current transformer according to claim 2, wherein said first housing and said second housing are of split construction.

4. The seal connection structure of a closed bus-bar mounted current transformer as claimed in claim 2, wherein said first and second housings have extension plates with mounting holes formed thereon; and a connecting bolt (7) penetrates through the mounting hole.

5. The hermetically sealed connection structure of an enclosed bus bar mounted current transformer of claim 1, wherein the hermetically sealed structure comprises:

the sealing element (9) is arranged on the connecting sleeve (8) and the bus shell (6) in a penetrating manner;

a sealing ring (10) arranged between the sealing element (9) and the connecting sleeve (8).

6. The hermetically sealed connection structure of a closed busbar mounted current transformer according to claim 5, characterized in that the surface of the sealing member (9) is provided with wrinkles.

7. The hermetically sealed connection structure of a closed bus bar mounted current transformer according to claim 2, characterized in that a viewing window (11) is provided on the first housing.

8. The hermetically sealed connection structure of a closed bus bar mounted current transformer according to claim 2, wherein a handle (12) is provided on the first housing.

9. The hermetically sealed connection structure of an enclosed busbar-mounted current transformer according to claim 1, comprising: the current transformer (4) is embedded in the closed bus (5), and the current transformer (4) is fixed on the conductor of the bus (5) through a fixing bolt (13).

10. The hermetically sealed connection structure of a closed busbar mounted current transformer according to claim 9, wherein the number of the fixing bolts (13) is at least four, and the fixing bolts (13) are uniformly distributed in the circumferential direction of the busbar housing (6).