CN203278146U - Expansion joint of phase-isolated enclosed bus - Google Patents

Abstract

The utility model belongs to the field of accessories for power equipment and particularly relates to the expansion joint of a phase-isolated enclosed bus, which comprises enclosed bus shell sections (1). An expansion joint (2) is arranged between two enclosed bus shell sections (1). The middle part of the expansion joint (2) is provided with an expansion joint deformation arc part (2-1). The two ends of the expansion joint (2) are fixedly connected with a reinforcing ring (3) respectively. Each reinforcing ring (3) is sleeved onto one end portion of the enclosed bus shell sections (1) and is welded with the end portion of the enclosed bus shell sections (1) in an enclosed manner. The expansion joint of the phase-isolated enclosed bus has the advantages of simple structure and low manufacturing cost. Through the deformation of the expansion joint deformation arc part, the stress caused by the axial force of the enclosed bus shell generated due to the difference between the thermal deformation and the foundation deformation can be removed. Therefore, potential safety hazards during the operation of the enclosed bus are eliminated.

Description

The isolated-phase enclosed bus expansion joint

Technical field

The utility model belongs to the power equipment accessory, particularly a kind of isolated-phase enclosed bus expansion joint.

Background technology

Isolated-phase enclosed bus is the key equipment in power plant, it is arranged between generator and main transformer, the current delivery that generator is sent is to main transformer, the arrangement length of isolated-phase enclosed bus is generally 60 meters left and right, the shell of isolated-phase enclosed bus is by the aluminium sheet manufacturing, be cylindrical shape, diameter does not coexist between φ 600mm to φ 1600mm according to the generating set size.In running, because the variation of the variation of conveying electric current and ambient temperature can constantly change the temperature on shell, and the thermal coefficient of expansion of aluminium is larger, cause the isolated-phase enclosed bus shell of 60 meters long along with the variation of temperature telescopic variation, isolated-phase enclosed bus passes factory building and arranges wall more in addition, isolated-phase enclosed bus is different at the brace foundation of indoor and outdoor, because different basic sedimentations also can cause the distortion of phaseisolated bus shell, brings hidden danger to safe operation.

Summary of the invention

The purpose of this utility model is to overcome above-mentioned technical deficiency, provides a kind of simple in structure, can eliminate the hidden danger that distortion brings, and can guarantee the isolated-phase enclosed bus expansion joint of safe operation.

The technical scheme that the utility model technical solution problem adopts is: the isolated-phase enclosed bus expansion joint comprises the enclosed busbar shell segments, be characterized in being provided with expansion joint between the enclosed busbar shell segments, be provided with expansion joint distortion arc section in the centre of expansion joint, the two ends of expansion joint are fixedly connected with respectively stiffening ring, stiffening ring is set on the termination of enclosed busbar shell segments, and sealing welding with it.

The beneficial effects of the utility model are: the isolated-phase enclosed bus expansion joint structure is simple, cheap, the distortion of expansion joint distortion arc section can be removed the stress that axial force that the enclosed busbar shell produces due to thermal deformation and foundation deformation difference causes, and eliminates the security of operation hidden danger of enclosed busbar.

Description of drawings

Illustrate with embodiment below in conjunction with accompanying drawing.

Fig. 1 is isolated-phase enclosed bus expansion joint structure figure.

In figure, 1-blockade line shell segments; The 2-expansion joint; 2-1-expansion joint distortion arc section; The 3-stiffening ring.

Embodiment

Embodiment, with reference to accompanying drawing 1, the isolated-phase enclosed bus expansion joint is provided with expansion joint 2 between enclosed busbar shell segments 1, expansion joint 2 is will be welded into columnar multi-layer thin aluminium sheet to carry out that circle is rolling to be formed on special equipment, be provided with the expansion joint distortion arc 2-1 of section in the centre of expansion joint 2, expansion joint 2 two ends are fixedly connected with respectively stiffening ring 3, and stiffening ring 3 is set on the termination of enclosed busbar shell segments, and sealing welding with it.

The operation principle of isolated-phase enclosed bus expansion joint is: the stress that axial force that the enclosed busbar shell produces due to thermal deformation and foundation deformation difference causes is removed in the distortion of the expansion joint distortion arc 2-1 of section by expansion joint 2, axial force direction in figure such as arrow indication, due to the stress of having eliminated above-mentioned reason and causing, just can guarantee the safe operation of phaseisolated bus.

Claims (1)

1. isolated-phase enclosed bus expansion joint, comprise enclosed busbar shell segments (1), it is characterized in that being provided with expansion joint (2) between enclosed busbar shell segments (1), be provided with expansion joint in the centre of expansion joint (2) and be out of shape arc section (2-1), the two ends of expansion joint (2) are fixedly connected with respectively stiffening ring (3), stiffening ring (3) is set on the termination of enclosed busbar shell segments (1), and sealing welding with it.

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