Device for testing seawater corrosion of pipeline

Abstract

The utility model discloses a device for testing seawater corrosion of a pipeline, which comprises a water replenishing tank, a water outlet of the water replenishing tank is communicated with a hot water tank through a water replenishing pipeline provided with a water replenishing pump, and an electric water heater is arranged in the hot water tank. A water outlet of the hot water tank is sequentially connected with the circulating water pump, the flow regulating valve, the flow stabilizing pipe section, the testing pipe section and a water inlet of the hot water tank through a high-pressure hose, and a pressure gauge and a thermometer are connected to the interior of the flow stabilizing pipe section. The device can effectively simulate actual working conditions, and can provide a basis for material selection of subsea pipelines and anti-corrosion research in ocean engineering.

Description

Technical Field

[0001] This utility model relates to a corrosion testing device, and more particularly to a pipeline device for testing and evaluating seawater corrosion. Background Technology

[0002] Seawater corrosion is a common problem in marine engineering, posing a threat to the stability and safety of pipelines. Current technology lacks a device capable of accurately simulating actual working conditions and testing seawater corrosion. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a device for testing seawater corrosion of pipelines, which can meet the requirements of corrosion simulation testing of subsea pipelines under different working conditions.

[0004] To achieve the above objectives, the technical solution adopted is:

[0005] This utility model discloses a device for testing seawater corrosion of pipelines, comprising a water supply tank. The outlet of the water supply tank is connected to a hot water tank via a water supply pipeline equipped with a water supply pump. An electric water heater is installed in the hot water tank. The outlet of the hot water tank is connected in sequence to a circulating water pump, a flow regulating valve, a flow stabilizing pipe section, a test pipe section, and the inlet of the hot water tank via a high-pressure hose. A pressure gauge and a thermometer are connected to the flow stabilizing pipe section.

[0006] The advantages of this invention are: 1. It provides a testing device that simulates the actual seawater corrosion environment. 2. It can accurately assess the corrosive effects of seawater on pipelines under different conditions. 3. It provides a basis for the selection of materials for subsea pipelines and reduces the risk of corrosion in subsea pipelines under complex operating conditions. It provides a powerful tool for corrosion prevention research in marine engineering. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of a device used for testing seawater corrosion in pipelines. Detailed Implementation

[0008] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0009] like Figure 1 The device shown is for testing seawater corrosion of pipelines. It includes a water supply tank, the outlet of which is connected to a hot water tank 2 via a water supply pipeline equipped with a water supply pump 6-1. An electric water heater is installed in the hot water tank. The outlet of the hot water tank is connected in sequence to a circulating water pump 6-2, a flow regulating valve 3, a flow stabilizing pipe section 4, a test pipe section 5, and the inlet of the hot water tank 2 via a high-pressure hose (the high-pressure hose refers to a hose capable of withstanding 100 MPa pressure). A pressure gauge 7 and a thermometer 8 are connected to the flow stabilizing pipe section.

[0010] The aforementioned flow stabilization section is used to stabilize fluid flow and reduce the impact of turbulence on corrosion testing. The hot water tank is used to simulate actual seawater temperature and chloride ion content, maintaining a consistent testing environment. The test pipeline is used for actual corrosion testing.

[0011] The working process of this device is as follows: Water in the water supply tank 1 is pumped into the hot water tank 2 by a water supply pump. In the hot water tank, after temperature control and the addition of chloride ions, simulated seawater is formed. The simulated seawater is fed into the flow regulating valve 3 through a high-pressure hose to adjust the actual flow rate of the simulated seawater, and then enters the stabilizing pipe section 4. In the stabilizing pipe section 4, the temperature and pressure of the simulated seawater are checked to ensure they meet the requirements. Once the requirements are met, the seawater enters the test pipe section 5 for corrosion testing. Finally, the water is returned to the hot water tank through the high-pressure hose, realizing a cyclical simulation of the corrosion of the test pipe section in seawater.

[0012] Preferably, a ball valve is connected to the water supply pipeline located on the inlet side of the water supply pump, and a check valve and a ball valve are connected to the water supply pipeline located on the outlet side of the water supply pump. The amount of water entering the hot water tank can be controlled by controlling the valves and the water supply pump, and the added check valve can also prevent water from flowing back into the water supply tank from the hot water tank.

[0013] Preferably, a manhole is provided on the hot water tank 2, through which the required chloride ions are added. A baffle is installed inside the hot water tank to divide the water heater into two independent chambers. The first chamber is connected to the water supply pipeline and the outlet of the high-pressure hose, and the second chamber is used to install the electric water heater. Water in the first chamber can overflow into the second chamber. The cold water entering the tank and the heated hot water are separated by the baffle to prevent uneven mixing of the cold and hot water. Then, two sets of parallel circulating water pumps are used to guide the flow regulating valve through the high-pressure hose.

[0014] The flow regulating valve 3 simulates the flow rate of seawater by controlling the flow rate of water introduced through the high-pressure hose. The flow regulating valve can be an 8-inch valve and uses a flange to connect the high-pressure hose and the flow stabilizing pipe section.

[0015] Preferably, seawater is kept constant in the stabilizing pipe section 4, and the seawater parameters are tested to see if they meet the requirements. The stabilizing pipe section can be an 8-inch copper-nickel pipeline, 6 meters long, with flanges at both ends connecting it to the test pipe section 5 and the flow regulating valve 3, respectively. The stabilizing pipe section can be connected to different test pipelines using different reducers.

[0016] The method of using this device is as follows:

[0017] 1. Turn on the water pump in the water tank to fill the entire experimental setup with water.

[0018] 2. Add the required amount of chloride ions based on the amount of water used in the water supply tank, simulating the operating conditions.

[0019] 3. Turn on the water heater to keep the circulating water at a constant temperature.

[0020] 4. Turn on the circulating water pump to keep the seawater circulating in the device.

[0021] 5. Adjust the flow control valve to adjust the seawater flow rate to the required experimental speed.

[0022] 6. Keep the equipment circulating, and after a certain period of time, remove the test section to observe its corrosion.

Claims

1. An apparatus for testing seawater corrosion in pipelines, characterized in that: The system includes a water supply tank, the outlet of which is connected to a hot water tank via a water supply pipeline equipped with a water supply pump. An electric water heater is installed in the hot water tank. The outlet of the hot water tank is connected in sequence to a circulating water pump, a flow regulating valve, a flow stabilizing pipe section, a test pipe section, and the inlet of the hot water tank via a high-pressure hose. A pressure gauge and a thermometer are connected to the flow stabilizing pipe section.

2. The apparatus for testing seawater corrosion of pipelines according to claim 1, characterized in that: A ball valve is connected to the water supply pipeline located on the water supply pump inlet side, and a check valve and a ball valve are connected to the water supply pipeline located on the water supply pump outlet side.

3. The apparatus for testing seawater corrosion of pipelines according to claim 1 or 2, characterized in that: A baffle is installed inside the hot water tank to divide the water heater into two independent chambers. The first chamber is connected to the water supply line and the outlet of the high-pressure hose, and the second chamber is used to install the electric water heater. Water in the first chamber can overflow into the second chamber.

4. The apparatus for testing seawater corrosion of pipelines according to claim 1 or 2, characterized in that: The circulating water pumps are two sets of circulating water pumps connected in parallel.

5. The apparatus for testing seawater corrosion of pipelines according to claim 4, characterized in that: A manhole is provided on the hot water tank.

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