CN210884958U - Hoisting system of converter station valve room - Google Patents

Abstract

The utility model discloses a hoist and mount system in converter station valve room, include: a suspended crane, a crane running rail; the suspension crane comprises an electric hoist, a hoisting running mechanism and a bridge; the crane running track is arranged right above the converter valve tower and is laid in the direction perpendicular to the converter valve bridge arm. Through implementing the utility model discloses enable hoist device and remove along 4 directions, reduce the track quantity that needs lay.

Description

A hoisting system for valve hall of converter station

technical field

The utility model relates to the field of electric power system substation engineering construction equipment, in particular to a hoisting system for a valve hall of a converter station.

Background technique

Flexible DC transmission is a new type of high-voltage DC transmission technology that uses self-shutoff power electronic devices as power conversion. Compared with conventional DC transmission using non-turn-off thyristors, flexible DC transmission, as a new generation of DC transmission technology, has the advantages of fast system response, better controllability, and flexible operation modes.

The DC converter station is the most important part of the DC transmission technology. For the flexible DC converter station that has been built, due to the low voltage level, small equipment size, simple valve hall layout and small valve hall size, the valve tower is mostly hoisted by a monorail hoist. installation and maintenance plan. As shown in Figure 1, the existing flexible DC converter stations in China set the flexible DC transformer and bridge arm reactor outdoors, and extend into the valve hall through the wall bushing. The starting resistance is set on the valve side of the flexible DC transformer, and the current measuring device between the bridge arm reactor and the transformer adopts an outdoor vertical type. The converter valve in the valve hall adopts the vertical support type, and there is no related electrical equipment above the valve tower. The installation and maintenance of the valve tower equipment adopts the hoisting scheme of hoist crane. The hoist crane track is set above the valve tower according to the direction along the bridge arm of the converter valve. .

However, in the existing hoisting scheme, the hoist rail is set above the valve tower along the direction of the bridge arm of the converter valve. With this scheme, on the one hand, the hoist crane can only move along the direction of the bridge arm of the converter valve, and the movement mode is limited , on the other hand a large number of tracks need to be laid.

SUMMARY OF THE INVENTION

The purpose of the embodiment of the present invention is to provide a hoisting system for the valve hall of the converter station, the hoisting device can move in four directions, and the number of tracks required to be used is less.

In order to achieve the above purpose, an embodiment of the present invention provides a hoisting system for a valve hall of a converter station, including: a suspension crane, a crane running track; the suspension crane includes an electric hoist, a hoisting running mechanism and a bridge; the The crane running track is arranged just above the converter valve tower, and is laid along the direction perpendicular to the converter valve bridge arm.

Further, the operating range of the hook of the electric hoist is greater than or equal to the width of the valve tower of the converter valve.

Further, the number of the suspension cranes and the number of the crane running rails are the same as the number of valve towers in each of the converter valve bridge arms.

Further, a pipe busbar is suspended above the converter valve tower, and the pipe busbar spans a converter valve valve tower in the converter valve bridge arm along the direction of the converter valve bridge arm. ; The height of the suspended crane from the ground is higher than the height of the pipe busbar from the ground.

By implementing the embodiments of the present utility model, the following beneficial effects are obtained:

The embodiment of the present invention provides a hoisting system for the valve hall of a converter station, which adopts a hanging crane to meet the hoisting requirements during the installation or maintenance of the converter valve tower. The direction of the valve bridge arm is laid directly above the valve tower of the converter valve. Compared with the previous hoisting scheme, on the one hand, in the previous hoisting scheme, the hoisting device can only move in the direction of the converter valve bridge arm, and cannot move in the direction perpendicular to the converter valve bridge arm, and the movement method is limited. In this scheme, a hanging crane is used as the hoisting device, and then the crane running track is laid directly above the valve tower of the converter valve along the direction perpendicular to the bridge arm of the converter valve. The heavy running mechanism moves horizontally along the crane running track to realize the movement perpendicular to the direction of the converter valve bridge arm. In addition, the electric hoist of the suspension crane moves horizontally along the bridge frame to realize the movement along the converter valve bridge arm direction. On the other hand, the crane running track of the previous hoisting device is set along the direction of the bridge arm, which requires a large number of tracks. For example, if there are 6 converter valve bridge arms in a valve hall, each converter valve bridge arm If there are two converter valve towers, 6 or 12 sets of crane running rails need to be laid according to the previous layout of the guide rails. If the power modules in the converter valve towers are arranged in a single row, one set of rails is set above each bridge arm. ; If the power module in the valve tower of the converter valve is arranged in a double row, two sets of tracks are arranged above each bridge arm. With the hoisting system provided by the utility model, only two sets of crane running rails need to be laid, which greatly reduces the laying quantity of the crane running rails.

Description of drawings

FIG. 1 is a schematic structural diagram of a valve hall of a flexible DC converter station in the prior art.

2 is a schematic structural diagram of a hoisting system for a valve hall of a converter station provided by an embodiment of the present invention.

3 is a schematic structural diagram of a valve hall of a flexible DC converter station provided by an embodiment of the present invention.

4 is another structural schematic diagram of a valve hall of a flexible DC converter station provided by an embodiment of the present invention.

5 is a schematic structural diagram of a suspension crane provided by an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

The embodiment of the utility model also provides a hoisting system for a valve hall of a converter station, including a suspension crane and a crane running track; the suspension crane includes an electric hoist, a hoisting operation mechanism and a bridge; the bridge passes through the hoisting operation mechanism The electric hoist moves horizontally along the crane running track, and the electric hoist moves horizontally along the bridge; the crane running track is arranged just above the valve tower of the converter valve and is laid along the direction perpendicular to the bridge arm of the converter valve.

Specifically, as shown in FIG. 2 , in a preferred embodiment, in the valve hall of the converter station, there are 6 converter valve bridge arms, and each converter valve bridge arm is provided with two converter valve valves Tower; the crane running track is laid above the converter valve tower, along the direction perpendicular to the converter valve bridge arm. Suspended cranes move on crane running rails. In Figure 2, the 12 converter valve towers in the 6 converter valve bridge arms are divided into two columns, and a group of crane operating rails is laid directly above each row of converter valve towers, and each group of crane operating rails is set There is a suspended crane, when the crane moves along the crane running track, the maintenance and hoisting of the 6 converter valve towers in the column can be realized. The whole scheme only needs to lay two sets of crane running tracks, and the existing technology is based on the converter valve tower. Laying tracks in the direction of the valve bridge arm requires 6 or 12 sets of crane running tracks, which greatly reduces the number of crane running tracks, reduces construction difficulty and saves costs. At the same time, the electric hoist in the suspension crane can move along the bridge arm to realize the movement along the bridge arm of the converter valve. Therefore, in the process of maintenance or hoisting, it can move in four directions, front, back, left, and right. Schematically, two converter valve towers are framed by dotted lines in FIG. 2 to represent the converter valve bridge arms in the valve hall of the converter station. Based on FIG. 2 , the above-mentioned direction of the bridge arm of the converter valve refers to the direction from left to right in FIG. 2 .

As shown in FIG. 5 , the suspension type crane includes an electric hoist 501 , a bridge frame 502 and a hoisting running mechanism 503 , and the hoisting running mechanism 503 moves horizontally on the crane running track.

In a preferred embodiment, the operating range of the hook of the electric hoist is greater than or equal to the width of the valve tower of the converter valve. It should be noted that the width of the converter valve tower mentioned here refers to the width of a single converter valve tower along the direction of the converter valve bridge arm. In this way, the hoisting or maintenance range of the entire suspension crane can cover the entire width of the valve tower.

In addition, in a preferred embodiment, when suspension insulators are provided on the left and right sides of the valve tower of the converter valve, at this time, the operating range of the hook of the electric hoist needs to be smaller than that of the two suspension insulators on the left and right sides. width to avoid touching the suspension insulator when the hook of the electric hoist moves left and right. This will be explained in detail later.

In a preferred embodiment, the number of the suspension cranes and the number of the crane running rails are the same as the number of the valve towers in each of the converter valve bridge arms.

In a preferred embodiment, a pipe busbar is suspended above the converter valve tower, and the pipe busbar spans a bridge in the converter valve bridge arm along the direction of the converter valve bridge arm. The valve tower of the converter valve; the height of the suspended crane from the ground is higher than the height of the pipe bus bar from the ground.

As shown in FIG. 3 and FIG. 4 , it is a schematic structural diagram of a valve hall of a flexible DC converter station provided by an embodiment of the present invention.

As shown in Figure 3, in the valve hall of a flexible DC converter station, each converter valve in the valve hall consists of 6 bridge arms, each bridge arm consists of 2 valve towers, and each valve tower consists of multiple The power modules are cascaded. The valve tower adopts the vertical support type (see Figure 4). Generally, the power module in the valve tower can be designed with single row or double row. In order to reduce the size of the valve hall and make full use of the upper space of the valve hall, the arrester and its connecting pipe busbar are installed by suspension. Arranged directly above the valve tower. The valve side bushing of the flexible DC transformer is connected to the isolating switch through the suspension insulator, and the isolating switch is connected to the current measurement device through the suspension insulator. Line ends are connected. The power modules in the bridge arm are cascaded through copper bars. The bridge arm DC side terminal is connected with the bridge arm DC current measuring device through the suspension insulator, and the bridge arm DC current measuring device is connected with the wall bushing through the suspension insulator. For the upper bridge arm, the V arrester is connected across the bridge arm and both ends of the bridge arm DC current measurement device through the suspension insulator.

Since there are suspension insulators and pipe bus bars above the valve tower along the direction of the bridge arm, the crane running track is laid in the direction perpendicular to the bridge arm. While avoiding electrical equipment, it reduces the difficulty of large-span manufacturing of related hoisting equipment and the difficulty of valve hall steel structure design. At the same time, the hanging crane can move flexibly in four directions: front, rear, left and right, and the hoisting is convenient.

Preferably, the distance between the pillar insulators on the side of the length of a single valve tower (in the direction of the bridge arm) is selected as the span of the electric hoist hook of the suspension crane (that is, the operating range of the electric hoist 501 along the direction of the bridge frame). At this time, the electric hoist The maximum operating range of the hook is less than the width of the two suspension insulation, so as to ensure that the suspension crane does not collide with the suspended electrical equipment when moving (as can be seen from Figure 4, the electric hoist 501 is on the bridge 502). When moving, it does not touch the V arrester or other equipment). Since there is only the pipe busbar directly above the valve tower, the busbar is hoisted by the suspension insulator, and the suspension insulator is installed under the lower chord of the structure through the equipment suspending beam, while the suspension crane is set under the lower chord, and the required space height is much smaller than that of the suspension insulator. Therefore, when the suspended crane runs perpendicular to the direction of the bridge arm, it avoids the collision with the suspended pipe bus or equipment. The number of suspension cranes is set for each valve hall according to the number of valve towers in a single bridge arm. When the number of valve towers in a single bridge arm is 2, the number of suspension cranes is set to 2.

By implementing the embodiments of the present utility model, the following beneficial effects are obtained:

First, the suspension crane is used as the hoisting equipment, and the crane running track is laid in the direction perpendicular to the bridge arm, which can make the hoisting equipment move in four directions, and improve the convenience of hoisting and maintenance of the valve tower equipment;

Secondly, the length of a single valve tower (in the direction of the bridge arm) is selected as the span of the suspended crane, which can effectively avoid the collision between the crane and the suspended electrical equipment, and at the same time reduce the difficulty of designing the steel structure of the valve hall;

Finally, the rails of the hoisting equipment are arranged perpendicular to the direction of the bridge arm of the converter valve, and the number of rails is small, which reduces the interference with the related electrical equipment directly above the valve tower and saves the layout space.

The above is the preferred embodiment of the present invention, it should be pointed out that for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can also be made. These improvements and modifications It is also regarded as the protection scope of the present invention.

Claims (4)

1. A hoisting system for a valve hall of a converter station, characterized in that it comprises: a suspended crane, a crane running track; the suspended crane comprises an electric hoist, a hoisting running mechanism and a bridge; the crane running track is arranged on the It is laid directly above the valve tower of the converter valve, and is laid in the direction perpendicular to the bridge arm of the converter valve; wherein, the electric hoist is arranged on the bridge frame, the hoisting operation mechanism is connected with the bridge frame, and the The crane running mechanism slides through the crane running track. 2 . The hoisting system for the valve hall of the converter station according to claim 1 , wherein the operating range of the hook of the electric hoist is greater than or equal to the width of the valve tower of the converter valve. 3 . 3. The hoisting system for the valve hall of the converter station according to claim 1, wherein the number of the suspended cranes and the number of the crane running rails are related to the valve in the bridge arm of each converter valve. The number of towers is the same. 4 . The hoisting system of the converter station valve hall according to claim 1 , wherein a pipe busbar is suspended above the converter valve valve tower, and the pipe busbar is along the bridge arm of the converter valve. 5 . The height of the suspension crane from the ground is higher than the height of the pipe busbar from the ground.

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