Testing device for testing influence of oxygen content of cooling water on corrosivity of weldment

Abstract

The testing device comprises a water tank, the water tank is connected with one end of a water pump through a pipeline, the other end of the water pump is connected with one end of an ion exchange column and one end of a test piece device through pipelines, and the other end of the ion exchange column is connected with the water tank through a pipeline. The other end of the test piece device is connected with one end of a temperature controller through a pipeline and a throttle valve, a conductivity meter, an oxygen content meter and a PH meter are arranged on the pipeline between the test piece device and the temperature controller, the other end of the temperature controller is connected with a water tank through a pipeline, and the water tank is connected with an oxygen content adjusting device. The test device tests and studies the oxygen content control requirements of a nuclear power plant generator stator cooling water system, can prepare demineralized water, and simulates different operation conditions by changing the temperature, oxygen content and other parameters of the demineralized water. The corrosion influence degree and the optimal control value of the water dissolved oxygen on the hollow-core copper conductor are obtained through research and analysis of the test piece.

Description

TECHNICAL FIELD

[0001] The utility model relates to chemical field especially, relates to test equipment particularly, and a kind of test device for testing the corrosion of cooling water oxygen content to welding piece. BACKGROUND

[0002] In the power industry, the quality and control parameters of generator stator cooling water are crucial to ensure the safe and efficient operation of the generator. Among them, the oxygen content in the cooling water is a key factor, which directly affects the corrosion inside the cooling system, especially the corrosion of the welding piece. As an important part of the generator stator structure, the corrosion resistance of the welding piece is directly related to the overall life and operation reliability of the generator. However, in the prior art, there is a lack of test device for testing the corrosion of generator test cooling water oxygen content to welding piece, which makes it difficult to determine the optimal control value of oxygen content during the operation of cooling water. SUMMARY

[0003] The utility model aims at providing a kind of test device for testing the corrosion of cooling water oxygen content to welding piece, and the test device for testing the corrosion of cooling water oxygen content to welding piece solves the technical problem of determining the optimal control value of oxygen content during the operation of cooling water in the prior art.

[0004] The utility model relates to a kind of test device for testing the corrosion of cooling water oxygen content to welding piece, including water tank, the water tank is connected with the one end of water pump by pipeline, the other end of water pump is connected with the one end of ion exchange column and the one end of test piece device by pipeline, the other end of ion exchange column is connected with water tank by pipeline, the other end of test piece device is connected with the one end of temperature controller by pipeline, throttle valve and pipeline, conductivity meter, oxygen content meter and PH meter are arranged on the pipeline between test piece device and temperature controller, the other end of temperature controller is connected with water tank by pipeline, and water tank is connected with oxygen content adjusting device.

[0005] Further, the test piece device includes a hanging piece tube.

[0006] Compared with the prior art, the utility model has positive and obvious effects. The purpose of the test device is to develop an oxygen content control optimization scheme for the cooling water of nuclear power turbine generator stator, to conduct experimental research on the oxygen content control requirements of the generator stator cooling water system of nuclear power plant, to self-make desalted water, to simulate different operating conditions by changing the temperature and oxygen content of desalted water, to analyze the corrosion influence degree and optimal control value of water dissolved oxygen on hollow copper wire through the research on test piece, to develop the optimal control parameters of generator stator cooling water pH value and conductivity, and to facilitate the oxygen content control of generator stator cooling water system during operation under the premise of ensuring the safe and reliable operation of generator. BRIEF DESCRIPTION OF DRAWINGS

[0007] Fig. 1 It is a structural schematic view of the test device for testing the influence of the oxygen content of cooling water on the corrosion of welded parts.

[0008] Fig. 2 It is a principle schematic view of the test device for testing the influence of the oxygen content of cooling water on the corrosion of welded parts. DETAILED DESCRIPTION

[0009] The utility model is further described below in combination with embodiments, but the utility model is not limited to the embodiments, and any similar changes of the utility model should be included in the protection scope of the utility model. The use of the directions such as upper, lower, front, rear, left, right, middle, inner and outer in the utility model is only for the convenience of clear description, and not for the limitation of the technical scheme of the utility model.

[0010] As shown in Figs. 1-2 The utility model discloses a test device for testing the influence of the oxygen content of cooling water on the corrosion of welded parts, which comprises a water tank 6, wherein the water tank 6 is connected with one end of a water pump 3 through a pipeline, the other end of the water pump 3 is connected with one end of an ion exchange column 2 and one end of a test piece device 8 through a pipeline, the other end of the ion exchange column 2 is connected with the water tank 6 through a pipeline, the other end of the test piece device 8 is connected with one end of a temperature controller 5 through a pipeline and a throttle valve 4, an electric conductivity meter 9, an oxygen content meter 10 and a PH meter 11 are arranged on the pipeline between the test piece device 8 and the temperature controller 5, the other end of the temperature controller 5 is connected with the water tank 6 through a pipeline, and the water tank 6 is connected with an oxygen content adjusting device 7.

[0011] Further, the test piece device 8 comprises a test piece hanging pipe 1.

[0012] Specifically, the water pump 3, the ion exchange column 2, the temperature controller 5, the electric conductivity meter 9, the oxygen content meter, the PH meter 11, the throttle valve 4, the oxygen content adjusting device 7, the test piece device 8 and the test piece hanging pipe 1 in the embodiment all adopt the known scheme in the prior art, and those skilled in the art are all familiar with them, and thus no further description is given here.

[0013] The working principle of the embodiment is as follows:

[0014] In the ion exchange column 2 is loaded with anion and cation resin, so that the water tank 6 water through ion exchange column 2, thus preparing desalted water. Using the conductivity meter 9, the first oxygen content meter 10, PH meter 11 to detect water quality, so that the effluent water is in line with the requirements of the water quality test water, while through the temperature control instrument 5 and throttle valve 4 control test water temperature and flow rate, through the oxygen content adjusting device 7 for nitrogen gas to change the oxygen content. Test piece is divided into pure copper test piece and welded test piece two kinds, with line wear good fixed in the hanging piece tube 1, so that the test water through the hanging piece tube 1, the test piece immersed in the test water, after a certain period of time, the state and corrosion of test piece before and after the test can be analyzed and studied, ultimately determine the stator cooling water in the rated operating conditions to meet the requirements of the water dissolved oxygen corrosion of copper wire and the best control value.

[0015] The purpose of the test device is to study the development of nuclear power turbine generator stator cooling water oxygen content control optimization scheme, the oxygen content control requirements of nuclear power plant generator stator cooling water system test research, can be made desalted water, and by changing the temperature and oxygen content of desalted water and other parameters, simulate different operating conditions, through the research and analysis of test piece draw water dissolved oxygen corrosion of copper wire and the best control value, research and development of the best generator stator cooling water pH and conductivity control parameters, in order to ensure the safe and reliable operation of the generator under the premise of the generator stator cooling water system operation process of oxygen content control.

Claims

1. A test apparatus for testing the effect of oxygen content in cooling water on the corrosivity of welded parts, characterized in that, The water tank is connected with the ion exchange column at the other end of the ion exchange column through a pipeline, and the other end of the ion exchange column is connected with the water tank through a pipeline.

2. The test apparatus for testing the effect of the oxygen content of cooling water on the corrosion of a welded member according to claim 1, characterized by The hanging piece pipeline is arranged on the test piece device.

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