CN110654977A - Flexible-straight converter valve submodule replacing tool and method - Google Patents

Abstract

The present invention provides a flexible DC converter valve sub-module replacement tool and method for replacing the converter valve sub-module at the valve tower of a flexible DC power transmission converter station. The replacement tool includes a rail beam and a rail beam for supporting the rail beam. The rail beam is located at the tower layer of the valve tower, the end of the rail beam protrudes from the side of the valve tower, and the rail beam is provided with a track that can be moved by the walking trolley; when replacing the converter valve at the tower layer When the sub-module is used, the converter valve sub-module is hoisted by the traveling trolley with the hoisting component, and the traveling trolley transports the converter valve sub-module to the preset position through the rail beam; the present invention is aimed at the valve tower structure, and can save the cost of the sub-module. Module replacement manpower and time, the purpose of ensuring work safety.

Description

A kind of flexible DC converter valve sub-module replacement tool and method

technical field

The invention relates to the field of electric power facilities, in particular to a flexible DC converter valve sub-module replacement tool and method.

Background technique

Flexible DC transmission technology is a relatively new type of transmission technology. As of August 2019, there are only 5 flexible DC transmission projects in operation nationwide. The converter valve is the core equipment of the flexible DC transmission converter station. It adopts MMC technology and fully controlled IGBT devices to realize the flexible converter function. The flexible HVDC converter valve is composed of many sub-modules. Taking the Xiamen flexible straight project as an example, a set of converter valves is composed of 1296 sub-modules, which are divided into 18 valve towers, and each valve tower has 72 sub-modules divided into three The floor is arranged on all sides, the valve tower is arranged on the ground, and the highest floor is about 7 meters above the ground. When one or some sub-modules fail, the sub-modules need to be replaced. Since the sub-modules are located on the valve tower, each sub-module weighs 250kG.

There is currently no tooling on the market that can be directly applied to this type of valve tower overhaul. Disassembly requires a lot of manpower and time.

SUMMARY OF THE INVENTION

The invention proposes a sub-module replacement tool and method for a flexible-DC converter valve, aiming at the valve tower structure, which can achieve the purpose of saving manpower and time for sub-module replacement and ensuring work safety.

The present invention adopts the following scheme.

A flexible DC converter valve sub-module replacement tool is used for replacing a converter valve sub-module at a valve tower of a flexible DC power transmission converter station, the replacement tool includes a rail beam and a beam frame for supporting the rail beam; The track beam is located at the tower layer of the valve tower, the end of the track beam protrudes from the side of the valve tower, and the track beam is provided with a track that can be moved by the walking trolley; when replacing the converter valve sub-module at the tower layer, the The converter valve sub-module is hoisted by a traveling trolley with a hoisting component, and the converter valve sub-module is transported to a preset position by the traveling trolley through the track beam.

When replacing the converter valve sub-module at the tower layer, the converter valve sub-module is lifted or lowered by a movable gantry crane with an electric hoist.

When replacing the converter valve sub-module, the new converter valve sub-module is first hoisted by the gantry to the lifting car of the converter station, and then transported to the track beam by the lifting handlebar, and then the walking The trolley sends the converter valve sub-module to the designated installation position at the valve tower.

A sub-module bracket is provided at the lift car for supporting the converter valve sub-module; when the replaced converter valve sub-module is pushed out from the valve tower, it can be temporarily placed at the sub-module bracket.

When replacing the converter valve sub-module on the top of the valve tower, the beam frame uses a steel beam, and the steel beam is installed on the pillar insulator on the top of the valve tower with the insulator gasket on the top of the valve tower. The steel beam and the insulator gasket The sheet can be removed after the replacement of the converter valve sub-module is completed.

When replacing the converter valve sub-module on the middle tower layer or the bottom layer of the valve tower, the beam frame is an insulating groove beam above the converter valve sub-module on the tower layer.

The hoisting assembly includes a sling connected to the traveling trolley with a turnbuckle bolt, the sling is provided with two or more hoisting arms that can be inserted into the hoisting holes of the converter valve sub-module; the sling can be used for the converter valve The submodule is lifted.

The hoisting assembly also includes a sling, a 4m sling is used when replacing the converter valve sub-module on the top of the valve tower, and a 3m sling is used when the converter valve sub-module in the middle layer of the valve tower is replaced.

A flexible-to-DC converter valve sub-module replacement method, the replacement method adopts the above-mentioned flexible-to-DC converter valve sub-module replacement tool, the method includes a method for installing the converter valve sub-modules of each layer of a valve tower, removing The method of the converter valve sub-module;

The method for installing the converter valve sub-modules of each layer of the valve tower includes the following steps:

A1. Place the sub-module bracket on the lifting car of the converter station; hoist the converter valve sub-module to the sub-module bracket with an electric hoist;

A2. Move the lift car and transport the converter valve sub-module to the bottom of the track beam; raise the height of the lift car until the converter valve sub-module reaches the hoisting position of the traveling trolley; then install a spreader on the converter valve sub-module; Then connect it with the walking trolley by the flower basket bolts of the spreader;

A3. Manually pull the walking trolley, move the converter valve sub-module to the installation position in the valve tower, release the converter valve sub-module to make it fall firmly on the insulating groove beam, fix it with fasteners, and finally remove the hanging equipment and move the walking trolley to the outside of the valve tower.

The method for removing the converter valve sub-module includes the following steps;

B1. Assemble the track beam; then install the traveling trolley equipped with the spreader on the track beam;

B2. Move the walking trolley to the top of the converter valve sub-module to be replaced, insert the eccentric pins at the bottom of the spreader into the hoisting holes on both sides of the lower part of the converter valve sub-module, and remove the bottom of the converter valve sub-module. bolt;

B3. After locking the position of the walking trolley, rotate the turnbuckle of the spreader, so that the spreader lifts the converter valve sub-module to 1~2cm away from the insulating beam;

B4. Move the lift car to the bottom of the rail beam, manually pull the traveling trolley, move the converter valve sub-module to the end of the rail beam, and adjust the posture of the converter valve sub-module so that its long side direction is the same as that of the lift car. The long sides are parallel;

B5. Lower the platform height of the lift car, move the converter valve sub-module directly above the lift car, and then raise the height of the lift car so that the converter valve sub-module can be placed on the sub-module bracket of the lift car, and then Fix the converter valve sub-module on the sub-module bracket, and then remove the spreader from the converter valve sub-module.

The invention provides a replacement tooling solution for the replacement of the flexible direct current transmission converter valve sub-module. The solution is aimed at the valve tower structure, and can achieve the purpose of saving manpower and time for sub-module replacement and ensuring work safety.

Description of drawings

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments:

Accompanying drawing 1 is the schematic diagram of valve tower and track beam of the present invention;

Accompanying drawing 2 is the schematic diagram of track beam, beam frame and spreader;

Accompanying drawing 3 is the schematic diagram of traveling trolley and spreader;

4 is a schematic diagram of replacing the converter valve sub-module with the cooperation of the lift truck;

In the picture: 1- valve tower; 2- track beam; 3- converter valve sub-module; 4- spreader; 5- beam frame; 6- walking trolley; 7- turnbuckle bolt.

Detailed ways

As shown in Figures 1-4, a flexible DC converter valve sub-module replacement tool is used to replace the converter valve sub-module 3 at the valve tower of the flexible DC power transmission converter station. on the beam frame 5 supporting the rail beam 2; the rail beam is located at the tower layer of the valve tower 1, the end of the rail beam protrudes from the side of the valve tower, and the rail beam is provided with a track for the moving trolley; when replacing When the converter valve sub-module is installed at the tower layer, the converter valve sub-module is hoisted by the traveling trolley 6 with the hoisting assembly, and the traveling trolley transports the converter valve sub-module to the preset position through the track beam.

When replacing the converter valve sub-module at the tower layer, the converter valve sub-module is lifted or lowered by a movable gantry crane with an electric hoist.

When replacing the converter valve sub-module, the new converter valve sub-module is first hoisted by the gantry to the lifting car of the converter station, and then transported to the track beam by the lifting handlebar, and then the walking The trolley sends the converter valve sub-module to the designated installation position at the valve tower.

A sub-module bracket is provided at the lift car for supporting the converter valve sub-module; when the replaced converter valve sub-module is pushed out from the valve tower, it can be temporarily placed at the sub-module bracket.

When replacing the converter valve sub-module on the top of the valve tower, the beam frame uses a steel beam, and the steel beam is installed on the pillar insulator on the top of the valve tower with the insulator gasket on the top of the valve tower. The steel beam and the insulator gasket The sheet can be removed after the replacement of the converter valve sub-module is completed.

When replacing the converter valve sub-module on the middle tower layer or the bottom layer of the valve tower, the beam frame is an insulating groove beam above the converter valve sub-module on the tower layer.

The hoisting assembly includes a sling 4 connected to the traveling trolley with a turnbuckle bolt 7, the sling is provided with two or more hoisting arms that can be inserted into the hoisting holes of the converter valve sub-module; the sling can be used for changing The flow valve sub-module is lifted.

The hoisting assembly also includes a sling, a 4m sling is used when replacing the converter valve sub-module on the top of the valve tower, and a 3m sling is used when the converter valve sub-module in the middle layer of the valve tower is replaced.

A flexible-to-DC converter valve sub-module replacement method, the replacement method adopts the above-mentioned flexible-to-DC converter valve sub-module replacement tool, the method includes a method for installing the converter valve sub-modules of each layer of a valve tower, removing The method of the converter valve sub-module;

The method for installing the converter valve sub-modules of each layer of the valve tower includes the following steps:

A1. Place the sub-module bracket on the lifting car of the converter station; hoist the converter valve sub-module to the sub-module bracket with an electric hoist;

A2. Move the lift car and transport the converter valve sub-module to the bottom of the track beam; raise the height of the lift car until the converter valve sub-module reaches the hoisting position of the traveling trolley; then install a spreader on the converter valve sub-module; Then connect it with the walking trolley by the flower basket bolts of the spreader;

A3. Manually pull the walking trolley, move the converter valve sub-module to the installation position in the valve tower, release the converter valve sub-module to make it fall firmly on the insulating groove beam, fix it with fasteners, and finally remove the hanging equipment and move the walking trolley to the outside of the valve tower.

The method for removing the converter valve sub-module includes the following steps;

B1. Assemble the track beam; then install the traveling trolley equipped with the spreader on the track beam;

B2. Move the walking trolley to the top of the converter valve sub-module to be replaced, insert the eccentric pins at the bottom of the spreader into the hoisting holes on both sides of the lower part of the converter valve sub-module, and remove the bottom of the converter valve sub-module. bolt;

B3. After locking the position of the walking trolley, rotate the turnbuckle of the spreader, so that the spreader lifts the converter valve sub-module to 1~2cm away from the insulating beam;

B4. Move the lift car to the bottom of the rail beam, manually pull the traveling trolley, move the converter valve sub-module to the end of the rail beam, and adjust the posture of the converter valve sub-module so that its long side direction is the same as that of the lift car. The long sides are parallel;

B5. Lower the platform height of the lift car, move the converter valve sub-module directly above the lift car, and then raise the height of the lift car so that the converter valve sub-module can be placed on the sub-module bracket of the lift car, and then Fix the converter valve sub-module on the sub-module bracket, and then remove the spreader from the converter valve sub-module.

In this example, when replacing the converter valve sub-module at the top of the valve tower, the beam frame uses a C50 model steel beam.

Claims (10)

1. A flexible DC converter valve sub-module replacement tool for replacing the converter valve sub-module at the valve tower of the flexible DC power transmission converter station, it is characterized in that: the replacement tool includes a rail beam and is used to support the rail The beam frame of the beam; the track beam is located at the tower layer of the valve tower, the end of the track beam protrudes from the side of the valve tower, and the track beam is provided with a track that can be moved by the walking trolley; when the commutator at the tower layer is replaced When the valve sub-module is installed, the converter valve sub-module is hoisted by a traveling trolley with a hoisting component, and the traveling trolley transports the converter valve sub-module to a preset position through the track beam. 2. A flexible DC converter valve sub-module replacement tool according to claim 1, characterized in that: when replacing the converter valve sub-module at the tower layer, the converter valve sub-module is replaced by an electric hoist. The movable gantry crane can be raised or lowered. 3. A flexible DC converter valve sub-module replacement tool according to claim 2, characterized in that: when replacing the converter valve sub-module, the new converter valve sub-module is first hoisted by a gantry to the converter station. Raise the car, and then transfer the converter valve sub-module with the raised handlebar to the track beam, and then use the traveling trolley to send the converter valve sub-module to the designated installation position at the valve tower. 4 . A flexible DC converter valve sub-module replacement tool according to claim 3 , wherein a sub-module bracket is provided at the lift car for supporting the converter valve sub-module; When the flow valve sub-module is pushed out of the valve tower, it can be temporarily placed on the sub-module holder. 5 . The flexible DC converter valve sub-module replacement tool according to claim 4 , wherein: when replacing the converter valve sub-module on the top of the valve tower, the beam frame uses a steel beam, and the steel beam The insulator gasket on the top of the valve tower is installed on the pillar insulator on the top layer of the valve tower. The steel beam and the insulator gasket can be removed after the replacement of the converter valve sub-module is completed. 6 . The flexible DC converter valve sub-module replacement tool according to claim 5 , wherein when replacing the converter valve sub-module in the middle tower layer of the valve tower or the bottom layer, the beam frame is the tower layer. 7 . The insulating grooved beam above the converter valve sub-module. 7 . The flexible-DC converter valve sub-module replacement tool according to claim 6 , wherein the hoisting assembly comprises a sling connected to the traveling trolley with a flower basket bolt, and the sling is provided with two or More than two hoisting arms can be inserted into the hoisting holes of the converter valve sub-module; the hoist can be used for hoisting the converter valve sub-module. 8. A flexible DC converter valve sub-module replacement tool according to claim 7, wherein the hoisting assembly further comprises a sling, and a 4m sling is used when replacing the converter valve sub-module on the top of the valve tower. Use a 3m sling when replacing the converter valve sub-module in the middle layer of the valve tower. 9. A method for replacing a flexible-DC converter valve sub-module, characterized in that: the replacement method adopts a flexible-DC converter valve sub-module replacement tool according to claim 6, and the method comprises installing a valve tower to replace each layer. The method of the flow valve sub-module, the method of removing the converter valve sub-module; The method for installing the converter valve sub-modules of each layer of the valve tower includes the following steps: A1. Place the sub-module bracket on the lifting car of the converter station; hoist the converter valve sub-module to the sub-module bracket with an electric hoist; A2. Move the lift car and transport the converter valve sub-module to the bottom of the track beam; raise the height of the lift car until the converter valve sub-module reaches the hoisting position of the traveling trolley; then install a spreader on the converter valve sub-module; Then connect it with the walking trolley by the flower basket bolts of the spreader; A3. Manually pull the walking trolley, move the converter valve sub-module to the installation position in the valve tower, release the converter valve sub-module to make it fall firmly on the insulating groove beam, fix it with fasteners, and finally remove the hanging equipment and move the walking trolley to the outside of the valve tower. 10 . The method for replacing a flexible DC converter valve sub-module according to claim 9 , wherein the method for removing the converter valve sub-module comprises the following steps; 11 . B1. Assemble the track beam; then install the traveling trolley equipped with the spreader on the track beam; B2. Move the walking trolley to the top of the converter valve sub-module to be replaced, insert the eccentric pins at the bottom of the spreader into the hoisting holes on both sides of the lower part of the converter valve sub-module, and remove the bottom of the converter valve sub-module. bolt; B3. After locking the position of the walking trolley, rotate the turnbuckle of the spreader, so that the spreader lifts the converter valve sub-module to 1~2cm away from the insulating beam; B4. Move the lift car to the bottom of the rail beam, manually pull the traveling trolley, move the converter valve sub-module to the end of the rail beam, and adjust the posture of the converter valve sub-module so that its long side direction is the same as that of the lift car. The long sides are parallel; B5. Lower the platform height of the lift car, move the converter valve sub-module directly above the lift car, and then raise the height of the lift car so that the converter valve sub-module can be placed on the sub-module bracket of the lift car, and then Fix the converter valve sub-module on the sub-module bracket, and then remove the spreader from the converter valve sub-module.

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