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 spring pulley (3); The inner pipe (2) is sleeved in the outer pipe (7); The pulley structure (3) is fixedly installed on the set position of the outer wall of the inner pipe (2), which is used for sliding on the inner wall of the outer pipe (7) and temporarily fixing the relative position of the inner pipe (2) and the outer pipe (7). In the scheme, the spring pulley (3) is arranged between the inner pipe (2) and the outer pipe (7), so that the inner pipe (2) and the outer pipe (7) can be temporarily fixed, avoiding damage caused by relative movement between pipe buses or between pipe buses and equipment. When the vibration is low in intensity, the anti-seismic ability between pipe buses is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of converter station fittings, in particular to a damping connection fitting. BACKGROUND

[0002] The DC power transmission project is mainly composed of converter stations (rectifier stations and inverter stations), DC lines, power filters on the AC side and the DC side, reactive power compensation devices, converter transformers, DC reactors, and protection and control devices, etc., wherein the converter station is the core of the DC power transmission system, and has many internal devices, mixed AC and DC, complex structure, and compact arrangement. The fittings play an important role in supporting and connecting various devices in the converter station, and some fittings also play a role in protecting the devices.

[0003] Currently, the fittings are used between the busbar and the valve tower in the converter station, and are usually hard connected. When supporting and electrically flowing in various forms, various spans and various angles, the busbar or the device may be deformed or displaced due to various factors during installation and operation.

[0004] In addition, with the gradual increase of power transmission and transformation project construction, the vibration or shock problem has gradually become one of the important factors threatening the safe and stable operation of power transmission and transformation equipment. Long-term high-frequency vibration can easily cause damage or even failure of various components of the equipment, seriously threatening the safety of the project. At the same time, according to the seismic intensity distribution map, many of the proposed and under-construction power transmission and transformation projects are located in high seismic intensity areas, which makes the electrical equipment in the converter station face a huge threat from earthquake disasters. Therefore, as an important node fitting connecting the devices, the anti-vibration or anti-seismic performance of the fitting is particularly prominent. SUMMARY

[0005] In order to solve the problem of weak anti-seismic performance caused by the hard connection of the connection fitting in the prior art, the present application provides a damping connection fitting.

[0006] The technical scheme provided by the present application is:

[0007] A damping connection fitting is installed between the busbar, the busbar and the valve tower in the converter station, comprising:

[0008] an inner tube (2), an outer tube (7) and a spring pulley (3);

[0009] The inner tube (2) is sleeved inside the outer tube (7);

[0010] The pulley structure (3) is fixedly installed on the set position of the outer wall of the inner tube (2), and is used for sliding on the inner wall of the outer tube (7) and temporarily fixing the relative position of the inner tube (2) and the outer tube (7).

[0011] Preferably, the spring pulley (3) comprises:

[0012] A set of pulley bases (11), connecting springs (13) and pulley structures;

[0013] The pulley bases (11) are installed at a set position on the outer wall of the inner tube (2);

[0014] The pulley structure is connected to the pulley base (11) through the connecting spring (13).

[0015] Preferably, the pulley structure comprises:

[0016] A pulley support (12) and a pulley;

[0017] The pulley is connected to the pulley support (12) through a bearing, and is used to slide on the inner wall of the outer tube (7).

[0018] Preferably, the outer tube (7) is provided with a set of equidistant holes along the axial direction;

[0019] The pulley can be clamped in the hole to temporarily fix the relative distance between the inner tube (2) and the outer tube (7).

[0020] Preferably, the fitting also comprises a damping structure;

[0021] The damping structure is installed between the inner tube (2) and the outer tube (7), and is used to buffer the relative displacement between the inner tube (2) and the outer tube (7).

[0022] Preferably, the damping structure comprises:

[0023] Two drag chains (4) and a plurality of gas springs (14);

[0024] The length of the drag chain (4) is greater than the maximum length of the relative displacement between 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 in a folded state;

[0025] A plurality of gas springs (14) are installed between the opposite folds of each drag chain (4), and are used to buffer the relative displacement between the two folded parts of the drag chain (4).

[0026] Preferably, the damping structure further comprises:

[0027] A sliding outer tube female cover (5) and a sliding inner tube female end cover (6);

[0028] The sliding inner tube female end cover (6) is fixedly installed at the port of the inner tube (2);

[0029] The sliding outer tube female cover (5) is fixedly installed on the inner wall of the outer tube (7) at a set position.

[0030] The sliding outer tube female cover (5) and the sliding inner tube female end cover (6) are connected through the drag chain (4).

[0031] Preferably, the sliding inner tube female end cover (6) is an open ring.

[0032] The diameter of the open ring is consistent with the diameter of the inner wall of the inner tube (2).

[0033] The open ring is provided with a pulley at the opening for sliding on the inner wall of the outer tube (7).

[0034] Preferably, the sliding outer tube female cover (5) comprises a rectangular body, which is fixedly installed on the inner wall of the outer tube (7) at a set position.

[0035] Preferably, the drag chain (4) is provided with a tenon interface at both ends.

[0036] The sliding inner tube female end cover (6) is axially provided with a tenon plate, which is tenoned with the tenon interface at one end of the drag chain (4) and is fixedly screwed.

[0037] The sliding outer tube female cover (5) is provided with two fold line-shaped tenon joints, which are tenoned with the tenon interface at the other end of the drag chain (4) and are fixedly screwed.

[0038] Preferably, the inner tube (2) is provided with a rectangular notch for providing the activity allowance of the damping structure.

[0039] Preferably, the fitting further comprises:

[0040] Two joint terminal fittings (10);

[0041] The connection terminal fitting (10) is fixedly installed at both ends of the damping connection fitting.

[0042] Preferably, the fitting further comprises:

[0043] Two equalizing balls (9);

[0044] The equalizing balls (9) are fixedly installed at both ends of the damping connection fitting and wrap the joint terminal fitting.

[0045] Compared with the prior art, the present application has the following beneficial effects:

[0046] The technical scheme provided by the present application is a damping connecting fitting, which is installed between a pipe (2) bus, a pipe bus and a valve tower in a converter station, and comprises an inner pipe (2), an outer pipe (7) and a spring pulley (3); the inner pipe (2) is sleeved in the outer pipe (7); the pulley structure (3) is fixedly installed on a set position of the outer wall of the inner pipe (2), and is used for sliding on the inner wall of the outer pipe (7) and temporarily fixing the relative position of the inner pipe (2) and the outer pipe (7). In the present scheme, the spring pulley (3) is arranged between the inner pipe (2) and the outer pipe (7), so that the inner pipe (2) and the outer pipe (7) can be temporarily fixed, and damage caused by relative movement between pipe buses or between a pipe bus and equipment is avoided; when a violent vibration with low intensity occurs, the anti-vibration capability between pipe buses is improved.

[0047] In the present scheme, the spring pulley (3) is arranged between the inner pipe (2) and the outer pipe (7), so that the relative distance between the inner pipe (2) and the outer pipe (7) can be actively adjusted according to actual working condition requirements, and the application place is wide. BRIEF DESCRIPTION OF DRAWINGS

[0048] Figure 1 It is a damping connecting fitting structure diagram of the present application.

[0049] Figure 2 It is a spring pulley structure diagram in the present application.

[0050] Figure 3 It is a drag chain structure diagram in the present application.

[0051] Figure 4 It is a front view of the drag chain structure in the present application.

[0052] Among them, 1 is a first connecting pipe bus; 2 is an inner pipe; 3 is a spring pulley; 4 is a drag chain; 5 is a sliding outer pipe bus cover; 6 is a sliding inner pipe bus end cover; 7 is an outer pipe; 8 is a second connecting pipe bus; 9 is a pressure equalizing ball; 10 is a joint terminal fitting; 11 is a pulley base; 12 is a pulley support; 13 is a connecting spring; and 14 is an air spring. DETAILED DESCRIPTION

[0053] In order to better understand the present application, the content of the present application will be further described below in combination with the drawings and examples in the specification.

[0054] Example 1

[0055] The present embodiment provides a damping connecting fitting, and a structure diagram is as shown in Figure 1 .

[0056] The spring pulley inner support type pipe bus slip damping connecting fitting for converter station is characterized in that it can be installed between the pipe bus, pipe bus and valve tower and the like in the converter station to realize mechanical support and electrical conduction in various forms, various spans and various angles, and compensate the deformation and displacement of the pipe bus or equipment caused by various factors during installation and operation.

[0057] The spring pulley inner support type pipe bus slip damping connecting fitting mainly comprises an inner pipe 2 and an outer pipe 7, and the two sides are connected with a first connecting pipe bus 1 and a second connecting pipe bus 8. The slip inner pipe 2 is connected with the first connecting pipe bus 1 through a joint terminal fitting 10, and the outer pipe 7 is connected with the second connecting pipe bus 8 through the joint terminal fitting 10. The first connecting pipe bus 1 can be regarded as a common pipe bus for current flow or as an outgoing line of the equipment.

[0058] In the damping connecting fitting, a spring pulley 3 is included, as shown in the structural schematic view Figure 2 The support spring pulley is fixed in the inner pipe 2 through a pulley base 11, each set of pulley is installed on a pulley support 12, and the pulley support 12 is connected with the pulley base 11 through a connecting spring 11. The inner pipe 2 is cut along the circumferential direction to form eight square holes, the pulley extends out of the inner pipe 2 through the square holes and is supported on the inner wall of the outer pipe 7, so as to fix the relative gap between the slip inner pipe 2 and the outer pipe 7 and ensure smooth slip.

[0059] In the damping connecting fitting, there is also a damping structure for flexibly connecting the inner pipe 2 and the outer pipe 7, including a drag chain 4, an air spring 14, a slip outer pipe bus cover 5 and a slip inner pipe bus end cover 6, as shown in the structural schematic view Figure 3 and the front view Figure 4 The outer slip pipe buses are connected through the drag chain 4 to form an electrical path. The drag chain 4 can be a woven belt drag chain, which is a soft copper woven belt drag chain structure, and includes two sets of soft copper woven belts and drag chains, one set of slip outer pipe bus cover 5, one set of slip inner pipe bus end cover 6 and a plurality of air springs 14. The two sets of soft copper woven belts and drag chains are symmetrically arranged along the slip outer pipe bus cover 5 and the slip inner pipe bus end cover 6 and are connected to the slip outer pipe bus cover 5 and the slip inner pipe bus end cover 6 at both ends respectively. The air springs 14 are uniformly arranged inside the drag chain structure, and when the inner pipe 2 and the outer pipe 7 move relatively, the air springs 14 on both sides will be uniformly stretched or compressed to hinder the violent relative movement between the pipe buses.

[0060] The damping structure in the scheme flexibly connects the inner pipe 2 and the outer pipe 7 to avoid damage caused by relative movement between the pipe buses or between the pipe buses and the equipment. When a vibration with low intensity occurs, the damping structure can consume the energy generated by the vibration to improve the vibration resistance or shock resistance of the equipment.

[0061] During installation, the female end cap of the sliding inner tube is fixed to one end of the inner tube 2, and the female end cap 5 of the sliding outer tube is welded to the opening of the outer tube 7 and polished.

[0062] In order to adapt to different voltage levels and transmission capacity requirements, and to ensure the applicability of the non-linear electromagnetic damping type transmission conductor wind vibration protection device, the connecting tube female, the sliding tube female, the soft copper braid, the drag chain, the inner support spring pulley, the equalizing ball, and the joint terminal hardware can be replaced according to actual design requirements;

[0063] In order to achieve better damping energy consumption effect, for the use environment with prominent vibration problem and large seismic intensity, different working strokes and working pressures of gas springs can be used, and symmetric or asymmetric installation methods can be used on both sides to better cover the displacement and impact load range of the equipment.

[0064] Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0065] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented 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.

[0066] The present application is described with reference to flowcharts and / or block diagrams according to the methods, devices (systems), and computer program products of the embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and the combination of flows and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to produce a machine, so that the instructions executed by the computer or other programmable data processing devices produce a device that implements the functions specified in the flowcharts and / or block diagrams. Figure 1 The device that implements the functions specified in one flow or multiple flows and / or blocks. Figure 1 The device that implements the functions specified in one flow or multiple flows and / or blocks.

[0067] These computer program instructions can also be stored in a computer-readable storage medium that can guide the computer or other programmable data processing devices to work in a specific manner, so that the instructions stored in the computer-readable storage medium produce a manufactured product including instruction devices that implement the functions specified in the flowcharts and / or block diagrams. Figure 1one or more processes and / or blocks Figure 1 the function specified in the one or more blocks.

[0068] These computer program instructions can also be loaded into computer or other programmable data processing devices, so that a series of operational steps are performed on the computer or other programmable data processing devices to generate computer-implemented processes, thus the instructions executed on the computer or other programmable data processing devices provide processes for implementing the flow Figure 1 one or more processes and / or blocks Figure 1 the steps of the function specified in the one or more blocks.

[0069] The above merely provides the embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

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 spring pulley (3); The inner pipe (2) is sleeved in the outer pipe (7); The spring pulley (3) is fixedly installed on the set position of the outer wall of the inner pipe (2), used for sliding on the inner wall of the outer pipe (7) and temporarily fixing the relative position of the inner pipe (2) and the outer pipe (7); The hardware further comprises a damping structure; The damping structure is installed between the inner pipe (2) and the outer pipe (7), used for buffering 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 installed between the opposite folds of each drag chain (4), used for buffering the relative displacement of the two folded parts of the drag chain (4).

2. The fitting of claim 1, wherein The spring pulley (3) comprises: A plurality of pulley bases (11), connecting springs (13) and pulley structures; The pulley base (11) is installed on the set position of the outer wall of the inner pipe (2); The pulley structure is connected with the pulley base (11) through the connecting spring (13).

3. The fitting of claim 2, wherein The pulley structure comprises: A pulley support (12) and a pulley; The pulley is bearing connected with the pulley support (12), used for sliding on the inner wall of the outer pipe (7).

4. The hardware according to claim 3, wherein The outer pipe (7) is provided with a plurality of equidistant holes in the axial direction; The pulley can be clamped in the hole, temporarily fixing the relative distance of the inner pipe (2) and the outer pipe (7).

5. 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 at the port of the inner pipe (2); The sliding outer pipe bus cover (5) is fixedly installed on the set position of the inner wall of the outer pipe (7); The sliding outer pipe bus cover (5) and the sliding inner pipe bus end cover (6) are connected through the drag chain (4).

6. The hardware according to claim 5, 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, used for sliding on the inner wall of the outer pipe (7).

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

8. The hardware according to claim 5, 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, tenoned with the tenon interface of one end of the drag chain (4) and fixed by screw thread; Two fold line-shaped mortise joints are arranged on the sliding outer tube female cover (5) to be mortised with the mortise interface of the other end of the drag chain (4) and are fixed by threads.

9. The fitting according to claim 1, wherein A rectangular cutout is arranged on the inner tube (2) to provide a movement allowance of the damping structure.

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

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

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