A compensating expansion joint device with soft copper band

Abstract

The utility model relates to a compensating type expansion joint device with soft copper band belongs to the technical field of high -voltage switch power transmission equipment. Its structure is: the flange disc is equipped respectively at the both ends of bellows, and a plurality of disc spring assemblies are jointly connected between two flange discs, the symmetrical soft copper band is equipped on the both sides of bellows, each soft copper band adopts multilayer soft copper band to be formed by superposition, and the both ends of multilayer soft copper band are welded together, and the middle part is not welded, and the whole presents S type structure, and the both ends of each soft copper band are connected through bolt and flange disc. The compensating type expansion joint device is connected the both ends of flange disc through soft copper band, not only effectively eliminates potential difference, prevents the equipment discharge phenomenon caused by potential difference, avoids the damage of equipment, and the corrosion phenomenon can be avoided by the conductive and voltage-sharing effect of soft copper band, guarantees the stable operation of equipment.

Description

Technical Field

[0001] This utility model relates to a compensating expansion joint device with a soft copper strip, belonging to the technical field of high-voltage switchgear. Background Technology

[0002] With the continuous expansion of the power grid, the number of power equipment operating in the grid is enormous, and the structural layout of each power station is complex and diverse. During the installation of GIS equipment, installation errors are unavoidable due to factors such as construction techniques and equipment dimensional tolerances. Simultaneously, during equipment operation, drastic changes in ambient temperature and the thermal effects generated by current flow cause thermal expansion and contraction of the GIS equipment casing. When the stress generated by these factors cannot be effectively released, it leads to uneven stress on the internal structure of the equipment. Over time, this can easily cause equipment damage and affect the safe and stable operation of the power system. Therefore, reliable and stable compensating expansion joints are crucial in the installation and operation of GIS equipment. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a compensating expansion joint device with a soft copper strip. The compensating expansion joint device connects the two ends of the flange through the soft copper strip, which not only effectively eliminates the potential difference and prevents the equipment discharge phenomenon caused by the potential difference, avoiding equipment damage, but also the conductivity and voltage equalization effect of the soft copper strip can prevent this corrosion phenomenon and ensure the stable operation of the equipment.

[0004] To solve the above problems, the specific technical solution of this utility model is as follows: a compensating expansion joint device with soft copper strip, wherein flanges are provided at both ends of the bellows, and several disc spring assemblies are connected between the two flanges; soft copper strips are symmetrically provided on both sides of the bellows, the soft copper strips are in an S-shaped structure, and the two ends of each soft copper strip are connected to the flanges by bolts.

[0005] The soft copper strip is made of multiple layers of soft copper strips stacked together, with the two ends of the multiple layers of soft copper strips welded together and the middle part unwelded.

[0006] The disc spring assembly comprises a sleeve, disc springs, and screw I. Several disc springs are concentrically arranged inside the sleeve. One end of screw I passes through the central hole of the disc spring and exits from one end of the sleeve. A nut on the outer end face of the sleeve is threadedly connected to screw I. A positioning screw II is connected to the other end of the sleeve. The outer ends of screw I and screw II are respectively connected to corresponding flanges, and both ends of the flanges are locked and positioned by nuts to the corresponding screw I or screw II.

[0007] A screw III is also provided between the two flanges. Two sets of nuts are provided at each end of the screw III, and are located on both sides of the corresponding flange.

[0008] The compensating expansion joint device with soft copper strip of this application has the following advantages when using the above structure:

[0009] 1. Soft copper strip has good conductivity. When a potential difference is easily formed on both sides of the device, soft copper strip can act as a conductive path to connect the potentials on both sides, effectively eliminate the potential difference, prevent equipment discharge caused by the potential difference, and avoid equipment damage.

[0010] 2. During the deformation of the corrugated pipe, the soft copper strip can effectively prevent static electricity accumulation and avoid the possibility of static electricity accumulation causing discharge, which could damage the electronic components and insulating materials inside the equipment.

[0011] 3. In the presence of potential difference and electrolyte, metal parts are prone to electrolytic corrosion, while the conductivity and voltage equalization of soft copper strip can avoid this corrosion phenomenon and ensure the stable operation of the equipment.

[0012] 4. The two soft copper strips have a multi-layered structure, combining high conductivity with plastic deformation capability. Simultaneously, by adjusting the disc spring assembly, the bellows length can be dynamically adjusted to achieve axial compression and compensation, effectively eliminating stress caused by current heating effects and environmental temperature differences in GIS equipment, preventing equipment damage due to stress concentration, and compensating for installation errors.

[0013] 5. The use of soft copper strips not only broadens the range of motion of the disc spring assembly, but also makes the performance of the entire expansion joint device more stable. During long-term operation, the expansion joint can work continuously and reliably, effectively ensuring the stable operation of GIS equipment, reducing equipment downtime caused by expansion joint failure, and improving the reliability of the power system.

[0014] 6. This expansion joint device has a simple structure, and its assembly can be completed in the factory. This greatly simplifies the installation process, reduces on-site installation workload and time, and lowers installation costs. Furthermore, when equipment maintenance is required, workers can quickly disassemble and install the expansion joint, improving maintenance efficiency.

[0015] 7. This application can be flexibly compressed and compensated according to the actual installation conditions on site. Whether it is dimensional error during installation or thermal expansion and contraction during equipment operation, it can respond promptly and make effective compensation, demonstrating strong practicality and being widely applicable to GIS equipment with various installation conditions. Attached Figure Description

[0016] Figure 1 This is a perspective view of this application.

[0017] Figure 2 for Figure 1 Sectional view at the axis.

[0018] Figure 3 This is a side view of this application.

[0019] Figure 4 This is the front view of the soft copper strip.

[0020] Figure 5 This is a top view of a soft copper strip. Detailed Implementation

[0021] like Figures 1 to 3 As shown, a compensating expansion joint device with soft copper strips is provided at both ends of the bellows 5, and several disc spring assemblies 3 are connected between the two flanges 1. Soft copper strips 4 are symmetrically provided on both sides of the bellows 5. Each soft copper strip 4 is made of multiple layers of soft copper strips. The two ends of the multiple layers of soft copper strips are welded together, and the middle part is not welded. The whole structure is S-shaped and has both high conductivity and plastic deformation capability. The two ends of each soft copper strip 4 are connected to the flange 1 by bolts.

[0022] The disc spring assembly 3 comprises a sleeve 31, disc springs 32, and screws I33. Several disc springs 32 are concentrically arranged within the sleeve 31. One end of the screw I33 passes through the central hole of a disc spring 32 and exits through one end of the sleeve 31. A nut on the outer end face of the sleeve 31 is threadedly connected to the screw I33. A positioning screw II34 is connected to the other end of the sleeve 31. The outer ends of screws I33 and II34 are respectively connected to corresponding flanges 1, and both ends of the flanges 1 are locked and positioned by nuts to the corresponding screws I33 or II34. The disc spring assembly 3 can dynamically adjust the bellows length to achieve axial compression and compensation, effectively eliminating stress caused by current heating effects and environmental temperature differences in GIS equipment, preventing equipment damage due to stress concentration, and compensating for installation errors.

[0023] A screw rod III2 is also provided between the two flanges 1. Two sets of nuts are provided at each end of the screw rod III2, and are located on both sides of the corresponding flange 1. The screw rod III2 is used for simple positioning during assembly or disassembly, or as a lifting connection during lifting. In actual use, the nuts on the screw rod III2 are in an insert-fit state with the flange 1 having axial freedom.

[0024] During installation, the expansion joint assembly is first assembled in the factory according to the design requirements, ensuring that all components are securely connected and accurately positioned. Upon arrival at the site, the screw III2 is placed in an axially free state, and the flange 1 is tightened to the connection point of the GIS equipment using bolts.

[0025] During prolonged operation, equipment inevitably experiences dimensional changes due to thermal effects of current or environmental temperature differences. When the equipment expands due to heat, the disc spring assembly compresses inward, causing the bellows to shorten and absorbing the excess length generated by the expansion. When the equipment contracts due to cooling, the disc spring assembly extends outward, causing the bellows to lengthen and compensating for the length changes caused by the contraction. Throughout this process, the soft copper strip bends and deforms accordingly with the bellows, maintaining good conductivity, eliminating potential differences, preventing static electricity buildup and electrolytic corrosion, and ensuring stable equipment operation.

Claims

1. A compensating expansion joint device with soft copper band, characterized by: Flanges (1) are provided at both ends of the bellows (5), and several disc spring assemblies (3) are connected between the two flanges (1); soft copper strips (4) are symmetrically provided on both sides of the bellows (5). The soft copper strips (4) are in an S-shaped structure, and the two ends of each soft copper strip (4) are connected to the flanges (1) by bolts.

2. The compensating expansion joint with soft copper band as claimed in claim 1 wherein: The soft copper strip (4) is made of multiple layers of soft copper strips stacked together, with the two ends of the multiple layers of soft copper strips welded together and the middle part unwelded.

3. The compensating expansion joint with soft copper band as claimed in claim 1 wherein: The disc spring assembly (3) comprises a sleeve (31), a disc spring (32), and a screw I (33); several disc springs (32) are arranged concentrically inside the sleeve (31), one end of the screw I (33) passes through the central hole of the disc spring (32) and exits from one end of the sleeve (31), and a nut on the outer end face of the sleeve (31) is threadedly connected to the screw I (33); a positioning screw II (34) is connected to the other end of the sleeve (31); the outer ends of the screw I (33) and the screw II (34) are respectively connected to the corresponding flange (1), and the two ends of the flange (1) are locked and positioned by nuts to the corresponding screw I (33) or screw II (34).

4. The compensating expansion joint with soft copper band of claim 1, wherein: A screw III (2) is provided between the two flanges (1). Two sets of nuts are provided at both ends of the screw III (2) and are located on both sides of the corresponding flange (1).

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