A damping connection fitting

Abstract

A damping connecting fitting is installed between the pipe (2) bus, pipe bus and valve tower in the converter station, comprising: inner pipe (2), outer pipe (7) and damping structure; The inner pipe (2) is sleeved in the outer pipe (7), and is connected by the damping structure, which is used for buffering the relative displacement between the inner pipe (2) and the outer pipe (7). The damping structure in the scheme avoids the damage caused by the relative movement between the pipe bus or the pipe bus and the equipment by flexibly connecting the inner pipe (2) and the outer pipe (7). When the vibration is low in intensity, the damping structure can consume the energy generated by the vibration, and improve the anti-vibration or anti-seismic ability of the equipment.

Description

Technical Field

[0001] This invention relates to the field of converter station fittings, and more specifically to a damping connection fitting. Background Technology

[0002] DC transmission projects mainly consist of converter stations (rectifier stations and inverter stations), DC lines, AC and DC side power filters, reactive power compensation devices, converter transformers, DC reactors, and protection and control devices. The converter station is the core of the DC transmission system, containing numerous internal devices, a mix of AC and DC components, a complex structure, and a compact layout. Hardware in the converter station plays a crucial role in supporting and connecting the various devices; some hardware also serves to protect the equipment.

[0003] Currently, the fittings used in converter stations for busbars and between busbars and valve towers are typically rigid connections. Under various forms of support, spans, and angles, and with electrical current flow, the busbars or equipment may experience deformation and displacement due to various factors during installation and operation.

[0004] Furthermore, with the increasing scale of power transmission and transformation projects, vibration has gradually become a significant factor threatening the safe and stable operation of power transmission and transformation equipment. Prolonged high-frequency vibration can easily lead to damage or even failure of various components of the equipment, seriously threatening the safety of the project. Meanwhile, according to seismic intensity distribution maps, many planned and under-construction power transmission and transformation projects are located in high-seismic-intensity areas, exposing electrical equipment within converter stations to a significant threat of earthquake disasters. Therefore, the vibration-resistant or seismic-resistant performance of hardware, as a crucial node connecting equipment, is particularly important. Summary of the Invention

[0005] To address the problem of weak seismic resistance caused by rigid connections in existing technologies, this invention provides a damping connection fitting.

[0006] The technical solution provided by this invention is:

[0007] A damping connection fitting, wherein the damping connection fitting is installed between the inner tube (2) busbar, the inner tube busbar and the valve tower in the converter station, comprising:

[0008] Inner tube (2), outer tube (7) and damping structure;

[0009] The inner tube (2) is fitted inside the outer tube (7) and connected by a damping structure to buffer the relative displacement between the inner tube (2) and the outer tube (7).

[0010] Preferably, the damping structure includes:

[0011] Two cable chains (4) and multiple gas springs (14);

[0012] The length of the drag chain (4) is greater than the maximum relative displacement length of the inner tube (2) and the outer tube (7); the drag chain (4) is connected to the inner tube (2) and the outer tube (7) respectively and is folded.

[0013] Multiple gas springs (14) are installed between the folds of each cable chain (4) to buffer the relative displacement of the two folded parts of the cable chain (4).

[0014] Preferably, the damping structure further includes:

[0015] Sliding outer tube end cap (5), sliding inner tube end cap (6);

[0016] The sliding inner tube end cap (6) is fixedly installed at a set position on the inner wall of the inner tube (2);

[0017] The sliding outer tube cap (5) is fixedly installed at a set position on the inner wall of the outer tube (7);

[0018] The sliding outer tube end cap (5) and the sliding inner tube end cap (6) are connected by the drag chain (4).

[0019] Preferably, the sliding inner tube end cap (6) is an open ring;

[0020] The diameter of the unclosed annulus is the same as the diameter of the inner wall of the inner tube (2);

[0021] A pulley is provided at the opening of the ring for sliding on the inner wall of the outer tube (7).

[0022] Preferably, the sliding outer tube cap (5) includes a rectangular body, which is fixedly installed at a set position on the inner wall of the outer tube (7).

[0023] Preferably, the drag chain (4) is provided with tenon joints at both ends;

[0024] The sliding inner tube end cap (6) is axially fixed with a tenon plate, which is tenoned with the tenon joint of one end of the drag chain (4) and threaded.

[0025] The sliding outer tube cap (5) is provided with two zigzag tenon joints, which are tenoned with the tenon joint at the other end of the drag chain (4) and fixed by threads.

[0026] Preferably, the inner tube (2) is provided with a rectangular cut to provide the damping structure with a margin of movement.

[0027] Preferably, the fitting further includes: a piston-type internal support pulley (3);

[0028] The piston-type inner support pulley is fixedly installed at the end of the outer tube (7) and is used to slide on the inner wall of the inner tube (2).

[0029] Preferably, the piston-type internal support pulley (3) includes:

[0030] Two internal support pulleys (11), pulley support rods (12) and pulley bases (13);

[0031] The pulley base (13) is fixedly installed on the end of the outer tube (7);

[0032] The two inner support pulleys (11) are fixedly connected to the pulley base (13) through the pulley support rod (12), and the inner support pulleys (11) slide on the inner wall of the inner tube (2).

[0033] Preferably, the inner tube (2) is provided with a set number of equidistant holes along the axial direction;

[0034] The inner support pulley (11) can be locked in the hole to temporarily fix the relative distance between the inner tube (2) and the outer tube (7).

[0035] Preferably, the hardware further includes:

[0036] Two connector terminal fittings (10);

[0037] The connecting terminal fitting (10) is fixedly installed at both ends of the damping connecting fitting.

[0038] Preferably, the hardware further includes:

[0039] Two equal pressure balls (9);

[0040] The equalizing balls (9) are fixedly installed at both ends of the damping connection fitting, enclosing the connector terminal fitting. Compared with the prior art, the beneficial effects of the present invention are:

[0041] The technical solution provided by this invention includes: the damping connection hardware is installed between the inner tube (2) busbar of the converter station, the busbar and the valve tower, including: inner tube (2), outer tube (7) and damping structure; the inner tube (2) is fitted inside the outer tube (7) and connected by the damping structure to buffer the relative displacement between the inner tube (2) and the outer tube (7). The damping structure in this solution flexibly connects the inner tube (2) and the outer tube (7), avoiding damage caused by relative movement between the busbars or between the busbars and the equipment. When a low-intensity vibration occurs, the damping structure can consume the energy generated by the vibration, improving the equipment's vibration resistance or shock resistance. Attached Figure Description

[0042] Figure 1This is a schematic diagram of a damping connection hardware structure according to the present invention;

[0043] Figure 2 This is a schematic diagram of the spring pulley structure in this invention;

[0044] Figure 3 This is a schematic diagram of the cable chain structure in this invention;

[0045] Figure 4 This is a front view of the cable chain structure in this invention;

[0046] Among them, 1-first connecting tube nut; 2-inner tube; 3-piston-type inner support pulley; 4-drag chain; 5-sliding outer tube nut cap; 6-sliding inner tube nut end cap; 7-outer tube; 8-second connecting tube nut; 9-evening ball; 10-connector terminal hardware; 11-inner support pulley; 12-pulley support rod; 13-pulley base; 14-gas spring. Detailed Implementation

[0047] To better understand this invention, the following description, in conjunction with the accompanying drawings and examples, will further illustrate the invention.

[0048] Example 1:

[0049] This embodiment provides a damping connection fitting, the structural diagram of which is shown below. Figure 1 As shown.

[0050] The spring pulley internal support type tube busbar sliding damping connection hardware for converter stations is characterized by its ability to function like ordinary tube busbar hardware, installed between tube busbars, valve towers, etc., within the converter station to provide mechanical support and electrical conduction in various forms, spans, and angles, and to compensate for deformation and displacement of the tube busbars or equipment caused by various factors during installation and operation. Simultaneously, it effectively reduces the impact of high-frequency vibrations or severe shocks through its internal damping energy dissipation mechanism.

[0051] The spring pulley internal support type sliding damping connection hardware mainly consists of an inner tube 2 and an outer tube 7, with a first connecting tube 1 and a second connecting tube 8 connected to each side respectively. The sliding inner tube 2 is connected to the first connecting tube 1 via a connector terminal hardware 10, and the outer tube 7 is connected to the second connecting tube 8 via a connector terminal hardware 10. The first connecting tube 1 can be considered a common tube 1 for current flow or as an outlet cable of the equipment.

[0052] The damping connection fitting includes a piston-type inner support pulley 3, which is fixed inside the outer tube 7 by a pulley base 13, and the inner support pulley 11 is inserted into the inner tube 2 by a pulley support rod 12 to fix the relative gap between the inner tube 2 and the outer tube 7 and ensure smooth sliding.

[0053] The damping connection hardware includes a damping structure. In this embodiment, the damping structure can be a cable chain structure, etc. A structural diagram is shown below. Figure 3 As shown, the front view is as follows Figure 4 As shown. The outer sliding tubes are connected by a cable chain 4, forming an electrical path. The cable chain 4 is a soft copper braided cable chain structure, consisting of two sets of soft copper braided straps and cable chains, a set of sliding outer tube end caps 5, a set of sliding inner tube end caps 6, and several gas springs 14. The two sets of soft copper braided straps and cable chains are symmetrically arranged along the sliding outer tube end cap 5 and the sliding inner tube end cap 6, with both ends connected to the sliding outer tube end cap 5 and the sliding inner tube end cap 6, respectively. The gas springs 14 are evenly arranged inside the cable chain structure. When the inner tube 2 and the outer tube 7 undergo relative displacement, the gas springs 14 on both sides will be evenly stretched or compressed, hindering the violent relative movement between the tubes.

[0054] During installation, the sliding inner tube end cap is fixed to one end of the inner tube 2, and the sliding outer tube end cap 5 is welded to the opening of the outer tube 7 and polished.

[0055] To adapt to different voltage levels and transmission capacity requirements and ensure the applicability of this nonlinear electromagnetic damping type transmission line micro-vibration protection device, the connecting tube nut, sliding tube nut, soft copper braided strip and drag chain, internal support spring pulley, equalizing ball, and joint terminal hardware can all be replaced according to actual design requirements.

[0056] To achieve better damping and energy dissipation, gas springs with different working strokes and working pressures can be used in environments with prominent vibration problems and high seismic intensity. Symmetrical or asymmetrical installation methods can be adopted on both sides to better cover the range of equipment displacement and impact load.

[0057] Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0058] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0059] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0060] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0061] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0062] The above are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of the claims of the present invention pending approval.

Claims

1. A damping connection fitting, characterized by, The damping connecting hardware is installed between the pipe (2) bus, pipe bus and valve tower in the converter station, comprising: The inner pipe (2), the outer pipe (7) and the damping structure; The inner pipe (2) is sleeved in the outer pipe (7) and connected through the damping structure to buffer the relative displacement between the inner pipe (2) and the outer pipe (7); The damping structure comprises: Two drag chains (4) and a plurality of gas springs (14); The length of the drag chain (4) is greater than the maximum length of the relative displacement of the inner pipe (2) and the outer pipe (7); the drag chain (4) is connected with the inner pipe (2) and the outer pipe (7) respectively and is in a folded state; A plurality of gas springs (14) are respectively installed between the opposite folding gaps of each drag chain (4) to buffer the relative displacement of the two folded parts of the drag chain (4).

2. The fitting of claim 1, wherein The damping structure further comprises: Sliding outer pipe bus cover (5), sliding inner pipe bus end cover (6); The sliding inner pipe bus end cover (6) is fixedly installed on the inner wall of the inner pipe (2) at a specified position; The sliding outer pipe bus cover (5) is fixedly installed on the inner wall of the outer pipe (7) at a specified position; The sliding outer pipe bus cover (5) and the sliding inner pipe bus end cover (6) are connected through the drag chain (4).

3. The hardware according to claim 2, wherein The sliding inner pipe bus end cover (6) is an open ring; The diameter of the open ring is consistent with the diameter of the inner wall of the inner pipe (2); The open ring is provided with a pulley at the opening for sliding on the inner wall of the outer pipe (7).

4. The hardware according to claim 3, wherein The sliding outer pipe bus cover (5) comprises a rectangular body fixedly installed on the inner wall of the outer pipe (7) at a specified position.

5. The hardware according to claim 2, wherein The drag chain (4) is provided with a tenon interface at both ends; The sliding inner pipe bus end cover (6) is fixedly provided with a tenon plate in the axial direction, which is tenoned with the tenon interface at one end of the drag chain (4) and is fixed by screw thread; The sliding outer pipe bus cover (5) is provided with two fold line tenon joints, which are tenoned with the tenon interface at the other end of the drag chain (4) and are fixed by screw thread.

6. The hardware according to claim 1, wherein The inner pipe (2) is provided with a rectangular notch to provide a movement allowance for the damping structure.

7. The fitting of claim 1 wherein, The hardware further comprises a piston type inner support pulley (3); The piston type inner support pulley is fixedly installed at the end of the outer pipe (7) to slide on the inner wall of the inner pipe (2).

8. The fitting of claim 7, wherein The piston type inner support pulley (3) comprises: Two inner support pulleys (11), a pulley support rod (12) and a pulley base (13); The pulley base (13) is fixedly installed at the end of the outer pipe (7); The two inner support pulleys (11) are fixedly connected with the pulley base (13) through the pulley support rod (12), and the inner support pulleys (11) slide on the inner wall of the inner pipe (2).

9. The hardware according to claim 7, wherein The inner pipe (2) is provided with a plurality of equidistant holes arranged in rows along the axial direction. The inner support pulley (11) can be clamped in the hole to temporarily fix the relative distance between the inner tube (2) and the outer tube (7).

10. The fitting of claim 1 wherein, The metal fitting further comprises: Two joint terminal metal fittings (10); The connection terminal metal fittings (10) are fixedly installed at two ends of the damping connection metal fitting.

11. The fitting of claim 10 wherein, The metal fitting further comprises: Two equalizing balls (9); The equalizing balls (9) are respectively fixedly installed at two ends of the damping connection metal fitting and wrap the joint terminal metal fittings.

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