Damping flange connector and method for converter station wall bushing and wall bushing

Abstract

The invention belongs to the technical field of lifeline engineering shock resistance and shock absorption, and provides a shock absorption flange connector and method for a wall bushing of a converter station and the wall bushing. Two vertical plates which are parallel to each other are arranged on a sleeve, the four side faces of the two vertical plates are connected through channel steel, each channel steel is provided with a damping part, and the damping parts are arranged on the two vertical plates; the damping piece comprises a spring arranged between the channel steel and the connecting plate; one end of the spring is connected with the compression piece, and the other end of the spring is connected with the channel steel; the damping pieces are arranged in the four side face directions, the buffering performance of the wall bushing in the radial direction can be met, the spring and the connecting plate are connected through the elastic pieces, the buffering of the wall bushing in the axial direction can be met, the sleeve and the damper are connected through the two vertical plates, the structure is simple, the pressure of the self gravity on the wall bushing and the damping pieces on the lower portion is small, and the damping performance is good. According to the utility model, the buffering performance of the wall bushing in the radial direction and the axial direction can be improved, and the gravity extrusion on the wall bushing and the bottom damping piece is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of earthquake resistance and shock absorption of lifeline engineering, and in particular relates to a shock-absorbing flange connector, method and wall bushing for a converter station wall bushing. Background Art

[0002] The power system is the foundation of national economic development. Large-scale power outages will seriously affect the normal operation of industry, agriculture and transportation, and even affect people's normal life. The impact of earthquakes on the power system is extremely serious, posing a great threat to the transmission and distribution network, and causing great economic losses to the power grid. The converter station is a complex and large system in the power grid. Once it is damaged in an earthquake, the entire power grid will be paralyzed.

[0003] A damping device is provided on the flange connecting the bushing and the valve hall, which can reduce the residual deformation and stress concentration of the wall bushing under earthquake action, and is of great significance for ensuring the safe operation of the valve hall of the converter station.

[0004] The inventors have discovered that the damping device currently provided on the flange connecting the sleeve and the valve hall can only buffer the radial vibration of the wall sleeve, but has poor buffering capacity in the axial direction of the wall sleeve; and the current damping device has a complex structure and a large gravity of its own, which will cause a certain pressure on the wall sleeve and the damping member at the bottom, and will cause long-term extrusion of the wall sleeve and the damping member themselves, affecting stability and life; in summary, the damping device currently provided on the flange connecting the sleeve and the valve hall cannot simultaneously improve the radial buffering and axial buffering performance of the wall sleeve, and reduce the gravity extrusion of the wall sleeve and the bottom damping member. Summary of the invention

[0005] In order to solve the above-mentioned problems, the present invention proposes a shock-absorbing flange connector, method and wall bushing for a converter station wall bushing. Damping parts are arranged on the four side directions of the two vertical plates, which can meet the radial buffering performance of the wall bushing. On this basis, the spring and the connecting plate are connected by an elastic part, which can meet the axial buffering of the wall bushing. The sleeve and the damper are connected by the two vertical plates. The structure is simple, the gravity is light, and the pressure of the self-gravity on the wall bushing and the damping part at the bottom is small. It can improve the radial buffering and axial buffering performance of the wall bushing, and reduce the gravity extrusion of the wall bushing and the bottom damping part.

[0006] In order to achieve the above-mentioned object, in a first aspect, the present invention provides a shock-absorbing flange connector for a wall bushing of a converter station, which adopts the following technical solution:

[0007] A shock-absorbing flange connector for a wall bushing of a converter station, comprising a sleeve, and two vertical plates arranged on the sleeve and parallel to each other;

[0008] The four sides of the two vertical plates are respectively connected by channel steels, each of which is provided with a damping member, which includes a spring arranged between the channel steel and the connecting plate; a connecting plate is provided at one end of each damping member away from the vertical plate, a compression member is provided on the connecting plate, and the compression member is an elastic member, one end of the spring is connected to the compression member, and the other end is connected to the channel steel.

[0009] Furthermore, a plurality of first reinforcing ribs are arranged along the circumferential direction on the sleeve between the outer sides of the two vertical plates.

[0010] Furthermore, a plurality of second reinforcing ribs are arranged along the circumferential direction on the sleeve between the inner sides of the two vertical plates.

[0011] Furthermore, the channel steel includes a flat plate and two vertical plates vertically arranged with respect to the flat plate; the two vertical plates are respectively connected with the two vertical plates by bolts; and the damping member is arranged in the middle position of the flat plate.

[0012] Furthermore, the connecting plate is parallel to the flat plate.

[0013] Furthermore, the spring is a disc spring.

[0014] Furthermore, an inner cylinder is provided on the connecting plate, a through hole is opened on the channel steel, and the inner cylinder is connected to a clamping plate after passing through the through hole; an outer cylinder is provided on the channel steel, and the inner cylinder is sleeved in the outer cylinder, and the axial length of the outer cylinder is smaller than the distance between the channel steel and the connecting plate.

[0015] Furthermore, the connecting plate is connected to the steel structure beam of the valve hall.

[0016] In order to achieve the above-mentioned purpose, in a second aspect, the present invention further provides a shock-absorbing flange connection method for a wall bushing of a converter station, which adopts the following technical solution:

[0017] A shock-absorbing flange connection method for a converter station wall bushing, using the shock-absorbing flange connector for a converter station wall bushing as described in the first aspect, comprising:

[0018] The connecting plate is connected to the steel structure beam of the valve hall, and the wall sleeve is connected to the steel structure beam of the valve hall through a plurality of damping members.

[0019] In order to achieve the above object, in a third aspect, the present invention further provides a wall bushing, which adopts the following technical solution:

[0020] A wall bushing comprises a bushing body, on which is sleeved a shock-absorbing flange connector for a wall bushing of a converter station as described in the first aspect.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] In the present invention, two vertical plates parallel to each other are arranged on the sleeve, and the four side surfaces of the two vertical plates are respectively connected by channel steels, and a damping member is arranged on each channel steel, and the damping member includes a spring arranged between the channel steel and the connecting plate; a compression member is arranged on the connecting plate, and the compression member is an elastic member, one end of the spring is connected to the compression member, and the other end is connected to the channel steel; damping members are arranged on the four side directions of the two vertical plates, which can meet the radial buffering performance of the wall sleeve, and on this basis, the spring and the connecting plate are connected by an elastic member, which can meet the axial buffering of the wall sleeve. In the present invention, the sleeve and the damper are connected by two vertical plates, and the structure is simple and the gravity is light. The pressure of the self-gravity on the wall sleeve and the damping member at the bottom is small, which can improve the radial buffering and axial buffering performance of the wall sleeve, and reduce the gravity extrusion of the wall sleeve and the bottom damping member. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings in the specification that constitute a part of this embodiment are used to provide a further understanding of this embodiment. The schematic embodiments of this embodiment and their descriptions are used to explain this embodiment and do not constitute improper limitations on this embodiment.

[0024] Figure 1 It is a three-dimensional schematic diagram of the shock-absorbing flange connector of Example 1 of the present invention;

[0025] Figure 2 It is a front view of embodiment 1 of the present invention;

[0026] Figure 3 is a top view of embodiment 1 of the present invention;

[0027] Figure 4 It is a side view of embodiment 1 of the present invention;

[0028] Figure 5 It is a cross-sectional view along the up-down direction of Example 1 of the present invention;

[0029] Figure 6 is a cross-sectional view along the front-to-back direction of Example 1 of the present invention;

[0030] Figure 7 It is a cross-sectional view along the left-right direction of Example 1 of the present invention;

[0031] Figure 8 This is a schematic diagram of the application of Embodiment 1 of the present invention;

[0032] Among them, 1. sleeve; 2. vertical plate; 3. first reinforcement rib; 4. second reinforcement rib; 5. channel steel; 6. bolt; 7. damping element; 8. connecting plate; 9. compression element; 10. inner tube; 11. outer tube; 12. clamping plate; 13. wall sleeve; 14. steel structure beam. DETAILED DESCRIPTION

[0033] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0034] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0035] Embodiment 1:

[0036] UHV DC wall bushings are the throat of the DC transmission system. Due to their long structure, they are vulnerable to earthquakes. Wall bushings, support insulators and other equipment are easily damaged during an earthquake, causing the power grid to collapse. There are many forms of damage to the wall bushing, such as root fracture, displacement and bottom crushing. The main reasons for the damage to the wall bushing are radial and axial displacement of the wall bushing during an earthquake. The radial displacement is caused by the earthquake affecting the wall bushing itself and the external force of the valve hall, and the axial displacement is generally caused by the tension generated by the shaking and vibration of the equipment connected at both ends of the wall bushing during an earthquake. Based on this, when a damper is set between the wall bushing and the valve hall, it is necessary to meet the buffering performance in both radial and axial directions. However, the damper currently set between the wall bushing and the valve hall can generally only meet the radial buffering purpose. In addition, the damper currently set between the wall bushing and the valve hall has a complex structure, and its own gravity has a certain pressure on the wall bushing and the damping parts at the bottom. Under long-term action, it will have a certain impact on the wall bushing and the damping parts at the bottom, especially the root connection of the wall bushing, which increases the probability of damage such as root fracture of the wall bushing in an earthquake.

[0037] The damping device currently installed on the flange connecting the sleeve and the valve hall cannot simultaneously improve the radial and axial buffering performance of the wall-penetrating sleeve and reduce the gravity extrusion of the wall-penetrating sleeve and the bottom damping member. Figure 1 As shown, this embodiment provides a shock-absorbing flange connector for a wall bushing of a converter station, which has a simple structure and is easy to install, and can reduce the residual deformation and stress concentration of the wall bushing under earthquake action. The shock-absorbing flange connector includes a sleeve 1, and two vertical plates 2 arranged on the sleeve 1 and parallel to each other;

[0038] The four side surfaces of the two vertical plates 2 are respectively connected by channel steels 5, each channel steel 5 is provided with a damping member 7, and each damping member 7 is provided with a connecting plate 8 at one end away from the vertical plate 2, and the damping member 7 includes a spring arranged between the channel steel 5 and the connecting plate 8; a compression member 9 is provided on the connecting plate 8, and the compression member 9 is an elastic member, one end of the spring is connected to the compression member 9, and the other end is connected to the channel steel 5.

[0039] Specifically, damping members 7 are arranged on the four side directions of the two vertical plates 2. In an earthquake environment, when the valve hall cracks or moves, the displacement between the valve hall and the wall bushing can be buffered by the damping member 7. When the wall bushing itself is slightly bent in the radial direction, the damping member 7 can reduce the radial force between the wall bushing and the valve hall wall, which can meet the purpose of radial buffering performance of the wall bushing. On this basis, the spring is connected to the connecting plate 8 by an elastic member 9, and the equipment connected to the wall bushing When shaking and vibration occur during an earthquake, which generates tension on the wall sleeve, the elastic member 9 is displaced in the radial direction, reducing the axial force between the wall sleeve and the valve hall wall, thereby satisfying the axial buffering of the wall sleeve; and, the sleeve 1 and the damper 7 are connected by two vertical plates 2, which has a simple structure and light gravity, and the pressure of its own gravity on the wall sleeve and the damping member at the bottom is small, which can improve the radial buffering and axial buffering performance of the wall sleeve, and reduce the gravity extrusion on the wall sleeve and the bottom damping member.

[0040] like Figure 1 and Figure 8 As shown, the sleeve 1 in this embodiment can be set as a metal tube or a lightweight alloy material. The sleeve 1 is used to fix the wall sleeve 13 to achieve the fixation of the wall sleeve 13 on the steel structure beam 14. Specifically, the hole in the middle of the sleeve 1 is used for the wall sleeve 13 to pass through the flange connector, and the flange connector and the wall sleeve 13 can be glued together by adhesive.

[0041] Optionally, when the length of the wall sleeve 13 is small, such as less than a preset length, the inner diameter of the sleeve 1 is close to the outer diameter of the wall sleeve 13, for example, the distance between the inner wall of the sleeve 1 and the outer wall of the wall sleeve 13 is less than a preset distance. At this time, because the length of the wall sleeve 13 is small, the requirements for operation, installation difficulty, and buffering performance that changes in the axial direction are small. The inner diameter of the sleeve 1 and the outer diameter of the wall sleeve 13 are set to close values ​​to improve the connection stability between the sleeve 1 and the wall sleeve 13.

[0042] When the length of the wall sleeve 13 is relatively large, for example, not less than a preset length, there is a certain gap between the inner diameter of the sleeve 1 and the outer diameter of the wall sleeve 13, for example, the distance between the inner wall of the sleeve 1 and the outer wall of the wall sleeve 13 is not less than a preset distance. At this time, due to the large length of the wall sleeve 13, the requirements for operation, installation difficulty, and buffering performance of axial changes are relatively large. Setting a certain gap between the inner diameter of the sleeve 1 and the outer diameter of the wall sleeve 13 can meet the flexible adjustment of the wall sleeve 13 in the axial direction during the installation process, reduce the difficulty of operation, and to a certain extent meet the buffering effect when the wall sleeve 13 is displaced in the axial direction.

[0043] The vertical plate 2 is a metal plate or other lightweight alloy material. The vertical plate 2 can be set as a rectangular plate, a circular plate, or a plate structure of other shapes such as a triangle, a pentagon, a hexagon, and an octagon. Optionally, a through hole is opened in the middle of the vertical plate 2, and the sleeve 1 is fixed by welding after being sleeved on the through hole on the vertical plate 2.

[0044] Specifically, two parallel vertical plates 2 can satisfy that the fixed axial distance of the wall sleeve 13 corresponds to the thickness of the steel structure beam 14 , and the structure is simple, and gravity will not cause a large pressure on the wall sleeve 13 .

[0045] like Figure 2 and Figure 3 As shown, a plurality of first reinforcing ribs 3 are respectively arranged along the circumferential direction on the sleeve 1 and between the outer sides of the two vertical plates 2. Optionally, the first reinforcing rib 3 is a metal plate with a triangular structure, and the two right-angled sides of the first reinforcing rib 3 are respectively connected to the sleeve 1 and the vertical plate 2 by welding or the like; and a plurality of first reinforcing ribs 3 are evenly distributed along the circumference of the sleeve 1. Specifically, the provision of a plurality of first reinforcing ribs 3 improves the connection strength between the sleeve 1 and the vertical plate 2, and avoids problems such as fracture of the connection due to the influence of the wall bushing 13 on the connector in an earthquake environment.

[0046] like Figure 4 and Figure 5 As shown, a plurality of second reinforcing ribs 4 are arranged circumferentially between the sleeve 1 and the inner sides of the two vertical plates 2. Optionally, the second reinforcing ribs 4 are metal plates of a rectangular structure, the two sides of the second reinforcing ribs 4 are respectively connected to the two vertical plates 2 by welding or the like, and the bottom of the second reinforcing ribs 4 is connected to the sleeve 1 by welding or the like; a plurality of second reinforcing ribs 43 are evenly distributed circumferentially along the sleeve 1. Specifically, the arrangement of the plurality of second reinforcing ribs 4 improves the connection strength between the sleeve 1 and the vertical plates 2, and avoids problems such as fracture of the connection caused by the influence of the wall bushing 13 on the connector in an earthquake environment.

[0047] like Figure 1 As shown, the channel steel 5 includes a flat plate and two vertical plates arranged perpendicular to the flat plate; the two vertical plates are connected to the two vertical plates 2 by bolts 6 respectively; the damping member 7 is arranged in the middle of the flat plate. Optionally, the two vertical plates are connected to the two vertical plates 2 by multiple bolts 6 respectively, which further increases the connection strength of the two vertical plates 2 without increasing the overall weight too much. The connecting plate 8 is parallel to the flat plate to ensure stability.

[0048] The four directions of the two vertical plates 2 are respectively connected to four channel steels 5. The contact length between the vertical plates 2 and the channel steels 5 and the number of bolts 6 used for connection are not limited and are determined according to specific needs.

[0049] like Figure 5 , Figure 6 and Figure 7 As shown, the damping member 7 includes a compression member 9, an inner cylinder 10, an outer cylinder 11, a clamping plate 12 and a spring. Optionally, the compression member 9 is arranged on the connecting plate 8 by bolt connection or the like; one end of the spring is connected to the compression member 9, and the other end is connected to the channel steel 5 by welding or bolt connection or the like. The inner cylinder 10 is arranged at the middle position of the connecting plate 8 by welding or the like, a through hole is provided at the middle position of the channel steel 5, and the inner cylinder 10 is connected to the clamping plate 12 after passing through the through hole; the channel steel 5 is provided with an outer cylinder 11, and the inner cylinder 10 is sleeved in the outer cylinder 11, and the axial length of the outer cylinder 11 is less than the distance between the channel steel 5 and the connecting plate 8.

[0050] Specifically, when the connecting plate 8 is squeezed under the external force, the spring is compressed, the inner tube 10 moves inward, and the spring is compressed to buffer the radial direction of the wall sleeve 13 until the connecting plate 8 contacts the end of the outer tube 11 and stops, thereby achieving a limiting effect. When the external force disappears, the spring stretches and drives the inner tube 10 to move outward until the clamping plate 12 contacts the channel steel and stops, thereby achieving a limiting effect. When the connecting plate 8 or the sleeve 1 is subjected to an axial external force under the external force, the compression member 9 is an elastic member that can buffer in the axial direction.

[0051] Optionally, the compression member 9 is made of elastic metal or rubber material, etc. It is understandable that the inner diameter of the through hole on the channel steel 5 is larger than the outer diameter of the inner cylinder 10, and the inner diameter of the outer cylinder 11 is larger than the outer diameter of the inner cylinder 10, so that the connecting plate 8 and the sleeve 1 have a certain relative displacement requirement along the axial direction of the wall sleeve 13. The inner cylinder 10 and the outer cylinder 11 can both be made of metal pipes, which are respectively connected to the connecting plate 8 and the channel steel 5 by welding or the like. The contact surface between the inner cylinder 10 and the outer cylinder 11 can be roughened or otherwise used to increase friction to form a friction energy dissipation surface. In another embodiment, lubricating oil is applied between the inner cylinder 10 and the outer cylinder 11 to reduce the friction between the two and facilitate the sliding of the inner cylinder 10 in the outer cylinder 11.

[0052] A hole is arranged in the middle of the compression member 9, the inner diameter of the hole is larger than the outer diameter of the outer cylinder 11, and a gap is left between the two so that the compression member 9 can pass through the outer cylinder 11 to compress the disc spring.

[0053] The spring may be a disc spring, which can meet the buffering requirements of the wall bushing 13 in the direction and the nonlinear characteristics of the wall bushing 13 under external force by virtue of its large stiffness, strong buffering and vibration absorption ability and variable stiffness characteristics. The disc springs can be arranged in the same direction or in opposite directions at intervals.

[0054] The flange connector is provided with disc springs in four directions, but the number of the disc springs in the horizontal and vertical directions may be inconsistent, depending on specific needs. The lengths of the inner tube 10 and the outer tube 11 in the horizontal and vertical directions may also be inconsistent, depending on specific needs.

[0055] like Figure 8 As shown, the connecting plate 8 can be made of metal plate or other alloy plate, and the connecting plate 8 is connected to the steel structure beam 14 of the valve hall by bolt connection or welding. The installation direction of the shock-absorbing flange can be set as needed, for example, the shock-absorbing flange can be placed in the following manner: Figure 8 The connecting plate 8 can be rotated 45° or at other angles to be connected to the valve hall. Bolt holes can be reserved on the connecting plate 8 to facilitate bolting of the connecting plate 8 and the steel structure beam 14 of the valve hall. If no bolt holes are reserved, the connecting plate 8 can be welded to the steel structure beam 14.

[0056] Embodiment 2:

[0057] This embodiment provides a shock-absorbing flange connection method for a converter station wall bushing, which helps to reduce the residual deformation and stress concentration of the wall bushing 13 under earthquake action, and reduce or avoid damage to the wall bushing 13 under earthquake action; the method uses the shock-absorbing flange connector for the converter station wall bushing as described in Example 1, including:

[0058] The connecting plate 8 is connected to the steel structure beam 14 of the valve hall, and the wall bushing 13 is connected to the steel structure beam 17 of the valve hall through a plurality of damping members 7 .

[0059] Embodiment 3:

[0060] This embodiment provides a wall bushing, comprising a bushing body, on which a shock-absorbing flange connector for a wall bushing in a converter station as described in Embodiment 1 is sleeved.

[0061] The above description is only a preferred embodiment of the present embodiment and is not intended to limit the present embodiment. For those skilled in the art, the present embodiment may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present embodiment shall be included in the protection scope of the present embodiment.

Claims

1. A shock-absorbing flange connector for a wall bushing in a converter station, characterized in that: It comprises a sleeve, and two vertical plates arranged on the sleeve and parallel to each other; The four sides of the two vertical plates are respectively connected by channel steels, each of which is provided with a damping member, which includes a spring arranged between the channel steel and the connecting plate; a connecting plate is provided at one end of each damping member away from the vertical plate, a compression member is provided on the connecting plate, and the compression member is an elastic member, one end of the spring is connected to the compression member, and the other end is connected to the channel steel.

2. The shock-absorbing flange connector for the wall bushing of a converter station according to claim 1, characterized in that: A plurality of first reinforcing ribs are respectively arranged along the circumferential direction on the sleeve and between the outer sides of the two vertical plates.

3. The shock-absorbing flange connector for the wall bushing of a converter station according to claim 1, characterized in that: A plurality of second reinforcing ribs are arranged on the sleeve between the inner sides of the two vertical plates along the circumferential direction.

4. The shock-absorbing flange connector for the wall bushing of a converter station according to claim 1, characterized in that: The channel steel comprises a flat plate and two vertical plates arranged perpendicular to the flat plate; the two vertical plates are connected to the two vertical plates respectively by bolts; and the damping member is arranged at the middle position of the flat plate.

5. The shock-absorbing flange connector for the wall bushing of a converter station according to claim 4, characterized in that: The connecting plate is parallel to the flat plate.

6. The shock-absorbing flange connector for the wall bushing of a converter station according to claim 1, characterized in that: The spring is a disc spring.

7. The shock-absorbing flange connector for the wall bushing of a converter station according to claim 6, characterized in that: An inner cylinder is arranged on the connecting plate, a through hole is opened on the channel steel, and the inner cylinder is connected to a clamping plate after passing through the through hole; an outer cylinder is arranged on the channel steel, and the inner cylinder is sleeved in the outer cylinder, and the axial length of the outer cylinder is smaller than the distance between the channel steel and the connecting plate.

8. The shock-absorbing flange connector for the wall bushing of a converter station according to claim 1, characterized in that: The connecting plate is connected to the steel structural beam of the valve hall.

9. A shock-absorbing flange connection method for a converter station wall bushing, characterized in that: The shock-absorbing flange connector for the wall bushing of a converter station according to any one of claims 1 to 8 is adopted, comprising: The connecting plate is connected to the steel structure beam of the valve hall, and the wall sleeve is connected to the steel structure beam of the valve hall through a plurality of damping members.

10. Wall bushing, characterized in that: It comprises a bushing body, on which is sleeved a shock-absorbing flange connector for a wall bushing in a converter station as claimed in any one of claims 1 to 8.

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