A phase-isolated busbar contact structure

Abstract

The present invention proposes a phase-separated busbar contact structure, which relates to the field of power transmission equipment. The structure includes an inspection cover 3, an inspection seat 6, a mother housing 5, a contact tube 1 and a contact piece 2. The present invention utilizes the circular top structure of the contact tube 1, and welds the contact piece 2 for inspection and grounding on the top of the contact tube 1 without affecting the use of the short-circuit test contact, thereby combining the short-circuit test and the inspection and grounding interface into one; not only does it reduce the manufacturing cost, but the structure also occupies a small space, can be applied to the narrow space layout of the project, and has strong structural applicability.

Description

Technical Field

[0001] The invention relates to the field of power transmission equipment, and in particular to a contact structure which is suitable for both short-circuit testing and maintenance grounding. Background Art

[0002] In the phase-isolated busbar system, due to functional requirements, the phase-isolated busbar needs to be equipped with a short-circuit test device and a maintenance grounding device respectively. Patent CN204166011U, a phase-isolated closed busbar short-circuit test conductor connection structure, discloses a phase-isolated busbar short-circuit conductor connection structure. The busbar conductors are welded with fixing seats, and the fixing seats are provided with bolt holes. The short-circuit test conductor is connected to the fixing seat of the busbar through a bolt and nut assembly to complete the short-circuit test. Figure 5 This is a detailed diagram of a traditional maintenance grounding device. Figure 5 In the process, a grounding transition bar is welded on the busbar conductor, and the grounding transition bar is connected to the maintenance grounding rod of the maintenance grounding device to complete the shutdown maintenance. However, in the prior art, these two test structures are set separately, which increases the cost of short-circuit or open-circuit testing and occupies a lot of space, making it impossible to implement structural layout when the project space is small. Summary of the invention

[0003] The purpose of the present invention is to solve the above-mentioned problem and proposes a phase-isolated busbar contact structure, wherein a contact column connected to a short-circuit test device is welded on the busbar conductor 4, and the contact column is the short-circuit test interface of the busbar conductor 4; a contact piece 2 connected to a grounding maintenance device is welded on the top of the contact column, and the contact piece 2 is the maintenance grounding interface of the busbar conductor 4; the short-circuit test interface and the maintenance grounding interface of the busbar conductor 4 are combined into one.

[0004] The phase-isolated busbar contact structure of the present invention further comprises a busbar housing 5 and a maintenance seat 6 welded to the busbar housing 5 , on which a maintenance cover 3 is arranged; the busbar conductor 4 is installed in the busbar housing 5 ; and the contact structure is arranged in the maintenance seat 6 .

[0005] Preferably, the contact column is a hollow contact tube 1 with openings at both ends; the contact tube 1 is made of a metal tube processed by a tube wall machine and has a smooth outer surface 1-1; the roughness of the outer surface 1-1 is not greater than 6.3.

[0006] Preferably, the metal tube is an aluminum tube with a diameter of 140 mm.

[0007] Preferably, the contact piece 2 is semicircular; the radius of the contact piece 2 is larger than the inner diameter of the contact cylinder 1 and smaller than the outer diameter of the contact cylinder 1 , and the semicircle of the contact piece 2 is welded to the top cross section of the contact cylinder 1 .

[0008] During the short-circuit test, open the inspection cover 3, put the short-circuit test conductor on the contact tube 1, and perform the short-circuit test.

[0009] When shutting down for maintenance, open the maintenance cover 3, engage the grounding rod clamp of the maintenance grounding device with the contact piece 2, and shut down for maintenance.

[0010] Compared with the prior art, the present invention has the following significant advantages:

[0011] (1) The present invention uses an aluminum tube with a diameter of 140 mm as the raw material, and uses a tube wall machine to form a smooth contact surface as the lap surface for the short-circuit test connection, thereby ensuring reliable current transition on the contact surface;

[0012] (2) The present invention cleverly designs the contact piece 2 for maintenance grounding according to the inner diameter of the contact tube 1, which not only facilitates the smooth insertion of the grounding rod clamp into the contact tube 1 but also ensures that the clamp can reliably engage with the contact piece 2;

[0013] (3) The contact of the present invention is welded to the busbar conductor 4, and has a simple structure, which is compact and reliable;

[0014] (4) The present invention utilizes the circular top structure of the contact tube 1. Under the premise of not affecting the use of the short-circuit test contact, a contact piece 2 for maintenance grounding is welded on the top of the contact tube 1, thereby combining the short-circuit test and maintenance grounding interfaces into one. This not only reduces the manufacturing cost but also the structure occupies a smaller space, can be applied to the narrow space layout of the project, and has strong structural applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 , Cross-sectional view of the main view of the contact

[0016] Figure 2 , Top view of the contact

[0017] Figure 3 , welding installation position diagram of contacts and busbars

[0018] Figure 4 Detailed diagram of traditional short circuit test device

[0019] Figure 5 , Detailed drawing of traditional maintenance grounding device

[0020] The meanings represented by the numbers in the figure are: contact tube 1, outer surface 1-1, contact piece 2, inspection cover 3, busbar conductor 4, busbar housing 5, and inspection seat 6. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0022] Various aspects of the present invention are described in this disclosure with reference to the accompanying drawings, in which many illustrative embodiments are shown. The embodiments of the present disclosure are not necessarily intended to include all aspects of the present invention. It should be understood that the various concepts and embodiments introduced above, as well as those described in more detail below, can be implemented in any of many ways, because the concepts and embodiments disclosed by the present invention are not limited to any implementation. In addition, some aspects disclosed by the present invention can be used alone or in any appropriate combination with other aspects disclosed by the present invention.

[0023] like Figure 1 As shown, the contact details of the present invention include a contact tube 1 and a contact piece 2. A hollow cylinder with two ends opened, namely, the contact tube 1, is welded to the outer shell of the busbar conductor 4. A semicircular contact piece 2 is welded to the top of the contact tube 1.

[0024] Preferably, the contact tube 1 is made of an aluminum tube with a diameter of 140 mm by using a tube wall machine, and has a smooth outer surface 1 - 1 , and the roughness of the outer surface 1 - 1 is not greater than 6.3.

[0025] like Figure 2 As shown, the semicircle of the contact piece 2 is welded to the top cross section of the contact tube 1, and the semicircular space left is convenient for the grounding rod clamp of the grounding device to engage the contact piece 2 for shutdown maintenance.

[0026] like Figure 3 As shown, the phase-separated busbar contact structure also includes a busbar housing 5 and an inspection seat 6 welded to the busbar housing 5, and an inspection cover 3 is arranged on the inspection seat 6; the busbar conductor 4 is installed in the busbar housing 5; and the contact structure is arranged in the inspection seat 6. When the short-circuit test is performed, the inspection cover 3 is opened, and the contact is connected to the short-circuit test conductor; when the machine is shut down for maintenance, the inspection cover 3 is opened, and the contact is connected to the maintenance grounding device.

[0027] Figure 4 This is a detailed diagram of a conventional short-circuit test device, in which a short-circuit test contact is welded on the busbar conductor 4 for use in a short-circuit test.

[0028] Figure 5 Detailed diagram of a traditional maintenance grounding device, with a grounding transition bar welded on the conductor to connect the maintenance grounding rod for grounding maintenance.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A phase-isolated busbar contact structure, characterized in that: A contact column connected to a short-circuit test device is welded on the bus conductor (4), and the contact column is a short-circuit test interface of the bus conductor (4); a contact piece (2) connected to a grounding maintenance device is welded on the top of the contact column, and the contact piece (2) is a maintenance grounding interface of the bus conductor (4); the short-circuit test interface and the maintenance grounding interface of the bus conductor (4) are combined into one; the contact column is a hollow contact tube (1) with openings at both ends; the contact piece (2) is semicircular; the radius of the contact piece (2) is greater than the inner diameter of the contact tube (1) and smaller than the outer diameter of the contact tube (1), and the semicircle of the contact piece (2) is welded to the top cross section of the contact tube (1); the contact tube (1) is made of a metal tube processed by a tube wall machine and has a smooth outer surface (1-1); the metal tube is a 140 mm aluminum tube.

2. The phase-isolated busbar contact structure according to claim 1, characterized in that: It also comprises a busbar housing (5) and a maintenance seat (6) welded to the busbar housing (5), wherein a maintenance cover (3) is arranged on the maintenance seat (6); the busbar conductor (4) is installed in the busbar housing (5); and the contact structure is arranged in the maintenance seat (6).

3. The phase-isolated busbar contact structure according to claim 1 is characterized in that: The roughness of the outer surface (1-1) is not greater than 6.

3.

4. The phase-isolated busbar contact structure according to claim 1, characterized in that: During the short-circuit test, the inspection cover (3) is opened, and the short-circuit test conductor is mounted on the contact tube (1) to perform the short-circuit test.

5. The phase-isolated busbar contact structure according to claim 1, characterized in that: When the machine is shut down for maintenance, the maintenance cover (3) is opened, and the grounding rod clamp of the maintenance grounding device is engaged with the contact piece (2) to carry out maintenance.

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