CN210350887U

CN210350887U - Generator stator bar maintains device

Info

Publication number: CN210350887U
Application number: CN201921891068.8U
Authority: CN
Inventors: 薛旻; 蔡高翔; 张小平; 徐传堂; 梁艳东
Original assignee: China Resources Power Changshu Co Ltd
Current assignee: China Resources Power Changshu Co Ltd
Priority date: 2019-11-05
Filing date: 2019-11-05
Publication date: 2020-04-17
Anticipated expiration: 2029-11-05

Abstract

The utility model discloses a generator stator bar maintenance device, which comprises a water inlet pipeline blocking plate, a water return pipeline blocking plate, a balance pipe manual valve, an exhaust pipe manual valve and a purging pipeline; the inlet pipe closure plate is installed in inlet pipe flange department, and the return water pipeline closure plate is installed in return water pipeline flange department, and the balance pipe manual valve is installed in advance return water balance pipe department, and the manual valve of blast pipe is installed in return water tank blast pipe department, sweeps the pipe connection and connects in excitation end collector pipe drain or vapour end collector pipe drain. The utility model does not change the original structure, does not need to add more equipment, and has simple operation; air inflation purging is adopted to replace natural drying, so that water vapor in the pipeline is removed completely; and (3) filling nitrogen gas by keeping positive pressure, discharging air in the pipeline, replacing the air with the nitrogen gas, isolating the metal from the air and preventing corrosion.

Description

Generator stator bar maintains device

Technical Field

The utility model belongs to the technical field of the generator is maintained, concretely relates to generator stator bar maintains device.

Background

The generator stator bar is an important component of the generator and is generally a copper bar. In normal operation of the unit, the stator cooling water fills the stator bars of the generator to play a role in cooling. When the stator cooling water system is shut down, the stator bar of the generator is hollow, air easily enters the stator bar, and the copper bar is corroded. The corrosion of the copper bar greatly reduces the reliability of the operation of the generator, and when the system is put into operation again, the generator needs to be flushed and changed with water for a long time, so that the resource is greatly wasted, and the problem that how to effectively corrode the copper bar of the generator is urgently needed to be solved.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve the problem that prior art exists, provided a generator stator bar maintenance device, in order to realize above-mentioned purpose, the utility model discloses a following technical scheme.

The utility model provides a generator stator bar maintains device, generator stator bar in cavity, in have stator cooling water to flow, flow in from the inlet channel, return water pipe flows, generator stator bar divide into and encourage end and steam end two parts, have communicating pipe to establish ties between the two parts, cooling water flows through from encouraging the end earlier, flows in the steam end from communicating pipe again, flows out from return water pipe at last, encourages the bottom of end and steam end to be equipped with respectively and encourages end collector pipe drain and steam end collector pipe drain and blowdown pipeline, controls the blowdown pipeline switch by encouraging end collector pipe drain valve and steam end collector pipe drain valve respectively.

A water inlet pipeline blocking plate, a water return pipeline blocking plate, a purging pipeline, an exhaust pipe and an exhaust pipe valve are additionally arranged on the generator stator bar maintenance device; the water inlet pipeline blocking plate is installed on the water inlet pipeline, the water return pipeline blocking plate is installed on the water return pipeline, a branch is arranged in front of the water return pipeline blocking plate to serve as an exhaust pipe, the exhaust pipe valve is installed on the exhaust pipe, and the purging pipeline is connected to a drain outlet of the excitation end water collecting pipe or a drain outlet of the steam end water collecting pipe.

Preferably, a water inlet and return balance pipe is communicated with the excitation end and the steam end, one end of the water inlet and return balance pipe is connected to the rear end of the water inlet pipeline blocking plate, and the other end of the water inlet and return balance pipe is connected to the front end of the water return pipeline blocking plate.

Preferably, the balance pipe valve is arranged on the water inlet and return balance pipe.

Preferably, the nitrogen charging device is connected to a purging pipeline.

Preferably, the excitation end water collecting pipe blowdown port valve, the steam end water collecting pipe blowdown port valve, the exhaust pipe valve and the balance pipe valve are manual valves or automatic control valves.

The utility model does not change the original structure, does not need to add more equipment, and has simple operation; air inflation purging is adopted to replace natural drying, so that water vapor in the pipeline is removed completely; and (3) filling nitrogen gas by keeping positive pressure, discharging air in the pipeline, replacing the air with the nitrogen gas, isolating the metal from the air and preventing corrosion.

Drawings

FIG. 1 is a view showing a structure of a maintenance device.

The device comprises a water inlet pipeline 1, a water inlet pipeline blocking plate 2, a water return pipeline 3, a water return pipeline blocking plate 4, a balance pipe 5, a balance pipe valve 6, an exhaust pipe 7, an exhaust pipe valve 8, a purging pipeline 9, a nitrogen charging device 10, an excitation end 11, an excitation end water collecting pipe blowdown port valve 12, a steam end 13 and a steam end water collecting pipe blowdown port valve 14.

Detailed Description

The technical scheme of the utility model is explained in detail with the attached drawings.

A cooling system of a generator stator bar is shown in figure 1 and comprises a water inlet pipeline 1, a water inlet pipeline blocking plate 2, a water return pipeline 3, a water return pipeline blocking plate 4, a balance pipe 5, a balance pipe valve 6, an exhaust pipe 7, an exhaust pipe valve 8, a purging pipeline 9, a nitrogen charging device 10, an excitation end 11, an excitation end water collecting pipe blowdown port valve 12, a steam end 13, a steam end water collecting pipe blowdown port valve 14 and the like.

After cooling water enters the excitation end 11 from the water inlet pipeline 1 and is fully filled, the cooling water enters the steam end 13 until the excitation end is fully filled, the cooling water flows out from the water return pipeline 3, air in the cooling water is discharged through the exhaust pipe 7, in order to adjust the balance of the pressure between the excitation end 11 and the steam end 13, the balance pipe 5 is connected between the water inlet pipeline 1 and the water return pipeline 3, the balance pipe valve 6 is arranged on the balance pipe 5, and the exhaust pipe 7 is provided with the exhaust pipe valve 8.

Traditional stator bar maintenance mode opens and stimulates end collector pipe blowdown mouthful valve 12 and steam end collector pipe blowdown mouthful valve 14, lets the rivers exhaustively, and natural drying can't guarantee that the inside steam of pipeline removes to the greatest extent, and there is the air inside the pipeline simultaneously, has aggravated the metal corrosion.

The cooling system is not changed, a device is added on the original structure, as shown in figure 1, a water inlet pipeline blocking plate 2 is added on a water inlet pipeline 1, a water return pipeline blocking plate 4 is added on a water return pipeline 3, a purging pipeline 9 and a nitrogen charging device 10 are additionally added, the purging pipeline 9 is sequentially connected with a water excitation end collecting pipe blowdown port valve 12 and a water vapor end collecting pipe blowdown port valve 14, and the nitrogen charging device 10 is connected with the purging pipeline 9.

The method is operated according to the traditional maintenance mode, so that water can flow out, and waiting for drying is not needed.

The purging pipeline 9 is communicated with the drain valve 12 of the excitation end water collecting pipe, the drain valve 14 of the steam end water collecting pipe, the water return pipe blocking plate 4, the balance pipe valve 6 and the exhaust pipe valve 8 are closed, the water inlet pipe blocking plate 2 is opened, inflation is started, the water inlet of the water inlet pipe 1 is observed until no water vapor is emitted, the water inlet pipe blocking plate 2 is closed, and at the moment, no water vapor exists in the pipeline from the water inlet pipe 1 to the excitation end 11, and the pipeline is in a positive pressure state.

And (3) opening the balance pipe valve 6 and the exhaust pipe valve 8, observing the water outlet of the exhaust pipe 7 until no water vapor is emitted, and closing the balance pipe valve 6 and the exhaust pipe valve 8, wherein at the moment, no water vapor exists in a pipeline from the balance pipe 5 to the exhaust pipe 7, and the pipeline is in a positive pressure state.

And opening the steam end water collecting pipe blowdown port valve 14 and observing until no water vapor is emitted, closing the excitation end water collecting pipe blowdown port valve 12, and at the moment, the pipeline of the steam end 13 has no water vapor and is in a positive pressure state.

The purging pipeline 9 is connected to a blowdown port valve 14 of the steam end water collecting pipe, the water return pipeline blocking plate 4 is opened, the water outlet of the water return pipeline 3 is observed until no steam is emitted, the water return pipeline blocking plate 4 is closed, and at the moment, no steam exists in the pipeline from the steam end 13 to the water return pipeline 3, and the pipeline is in a positive pressure state.

And (3) opening the drain valve 12 of the excitation end water collecting pipe and observing until no water vapor is emitted, closing the drain valve 12 of the excitation end water collecting pipe, and at the moment, the pipeline of the excitation end 11 has no water vapor and is in a positive pressure state.

So far, the water vapor in the stator bar of the generator is removed.

And (3) opening the balance pipe valve 6, connecting a nitrogen filling device 10 into the purging pipeline 9, continuously filling nitrogen into the interior until the air pressure is kept at 0.1Mpa, opening the excitation end water collecting pipe blowdown port valve 12 for a period of time, closing the excitation end water collecting pipe blowdown port valve 12 again until the air pressure returns to 0.1Mpa, keeping closing the steam end water collecting pipe blowdown port valve 14, and filling nitrogen into the stator bar of the generator at the moment to prevent metal corrosion.

The above-mentioned embodiments of the present invention are not intended to limit the present invention, and any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention are all included in the protection scope of the present invention.

Claims

1. A generator stator bar maintenance device is hollow, stator cooling water flows through the generator stator bar, flows in from a water inlet pipeline and flows out from a water return pipeline, the generator stator bar is divided into an excitation end and a steam end, communicating pipes are connected in series between the excitation end and the steam end, the cooling water flows through the excitation end firstly, then flows into the steam end from the communicating pipes and finally flows out from the water return pipeline, the bottom of the excitation end and the bottom of the steam end are respectively provided with an excitation end water collecting pipe drain outlet, a steam end water collecting pipe drain outlet and a drain pipeline, and a drain pipeline switch is controlled by an excitation end water collecting pipe drain outlet valve and a steam end water collecting pipe drain outlet valve respectively; the water inlet pipeline blocking plate is installed on the water inlet pipeline, the water return pipeline blocking plate is installed on the water return pipeline, a branch is arranged in front of the water return pipeline blocking plate to serve as an exhaust pipe, the exhaust pipe valve is installed on the exhaust pipe, and the purging pipeline is connected to a drain outlet of the excitation end water collecting pipe or a drain outlet of the steam end water collecting pipe.

2. The generator stator bar maintaining device according to claim 1, further comprising a water inlet and return balance pipe communicating the excitation end and the steam end, wherein one end of the water inlet and return balance pipe is connected to the rear end of the water inlet pipe blocking plate, and the other end of the water inlet and return balance pipe is connected to the front end of the water return pipe blocking plate.

3. The generator stator bar maintenance device of claim 2, wherein a balance pipe valve is mounted on the water inlet and return balance pipe.

4. Generator stator bar servicing device according to any of claims 1, 2 or 3, wherein the nitrogen charging device is connected to the purge line.

5. The generator stator bar maintenance device of claim 1, wherein the field end header drain valve and the steam end header drain valve are manual or self-controlled valves.

6. The generator stator bar maintenance device of claim 1, wherein said exhaust pipe valve is a manual or self-controlled valve.

7. The generator stator bar maintenance device of claim 3, wherein said balance pipe valve is a manual or self-controlled valve.