This standard specifies the test items and methods for the automatic control devices of compressed air, bilge water, fresh water and sanitary water systems on small and medium-sized ships. This standard is mainly applicable to ocean transport ships with a deadweight of 5,000 tons or less. Other ships can also refer to it. GB 11576-1989 Test methods for automatic control devices of compressed air, bilge water, fresh water and sanitary water systems on small and medium-sized ships GB11576-1989 Standard download decompression password: www.bzxz.net

TDC 629.12- 06-52.001. 4
National Standard of the People's Republic of China
GB71676—89
Methods of test on sutomatic control of comprcssedalr, bllge, fresh water and sanitary systems for smaller ships Issued on 1989-08:10
Implemented on 1990-03-01
National Standard of the People's Republic of China
Methods of test on sutomatic control of comprcssedalr, bllge, fresh water and sanitary systems for smaller ships Issued on 1989-08:10
Implemented on 1990-03-01
National Standard of the People's Republic of China
Methods of test on sutomatic control of comprcssedalr, bllge, fresh water and sanitary systems for smaller ships shlpe1 Subject content and applicable specifications
GB11576·89
This standard specifies the test date and method of the automatic control device of the compressed air, bilge water, reading water and sanitary water system on small and medium-sized ships.
This standard is mainly applicable to the ship with a deadweight of 5000t or less, and other ships can also refer to it. 3 Reference standards
GB3471 Marine power engine cold mooring test 3 Test items
3.1 Compressed air system
Air compressor start and stop test;Www.bzxZ.net
Air compressor automatic start test!
Compressed air low pressure warning test!
Air main valve closing indication device test,
3.2 Civilian water system
High bottom water level alarm test
Bilge water system automatic stop temporary test!
Oil-water separation automatic flushing test,
3.3 Fresh water conversion raw water system
Pump automatic stop test
1 Test standard
4.1 The installation of each system specified in this standard shall comply with the test requirements of "%3471". 4.2 Before the test, the following items should be checked;
The installation position of the automatic control and measuring instruments shall comply with the design requirements, b. The voltage and frequency of the power supply shall include design requirements: temporary system installation, start-up status, self-dig table, protection circuit and alarm adjustment status shall comply with design requirements. 5 Test method violation
5. 1 Compressed air system
Guohao Technical Supervision Bureau 1989-08-10 approved 1990-03-01 purchased
5.1.1 Air compressor start and stop device test GD1157E89
Use the air compressor start and stop control to evaluate the accuracy of the valve and the actual compressor work accuracy:? h. Check whether the air compressor operation indicator light set in the nest control millimeter and other places is working properly. 5.1.2 Air compressor automatic start and stop device test 5..2.1 Connect the power supply to the motor or air compressor
, the power indicator light should start from the bottom to start the air compressor, fill the air bottle to the working pressure, and the air compressor should start at the low temperature value of the unloading valve:; h. "Set the command switch to the "automatic" position, open the air bottle's pressure relief valve to gradually reduce the pressure in the air block. When the pressure in the air block drops to the set lower limit, the air compressor should start automatically, and then the pressure relief valve will automatically close, and the air bottle will be released. When the pressure in the air bottle reaches the set upper limit, the compressor should stop automatically and the load will automatically start. The air pressure when the compressor starts and stops should be consistent with the set pressure. C. Check whether the engine operation indicator light installed in the control room is working properly. 5-1.2.2 Check the air compressor through the clutch engagement The clutch of the air compressor is operated by manually closing the high clutch, starting the air compressor, filling the air bottle, and after confirming that the unloading system and the air compressor are working normally, disengage the clutch;. Turn the command switch to the "automatic" position. Open the release button of the air plate, and the pressure in the air plate will gradually decrease. When the pressure inside the air drops to the set lower limit, the clutch will automatically close, and the air compressor will automatically close. d. Close the air bottle. When the pressure inside the air rises to the set upper limit pressure, the clutch will automatically disengage, the machine will stop running, and the load will automatically open at the same time! e: Observe the start of the air compressor. The pressure of the air when starting and stopping should be consistent with the set pressure. 1 Check that the operation indicator of the air compressor installed in the control room is normal. 5.1.3 [The following air low alarm test is not performed. The air pressure in the main air tank or the recording system is artificially reduced. When the pressure drops to the set alarm pressure, the low pressure alarm device should issue an alarm and the alarm indicator light will be on.
5.1.4 Test of the air main network closing indicator device? Close the two air bottles or the main air in the system. The closing indicator device is in action, and the alarm indicator light and the replacement work are normal. 5.2 Bottom water system
5.2.1 The bottom water high position Pre-installation test
Make the bilge ditch produce high level or manually make the float move, select the high level alarm device, the alarm indicator light and the alarm level should be normal.
5.2.2 The automatic start and stop of the bilge system should be tested, the power supply should be turned on, the power indicator light should be full. Start the bilge pump automatically, check the operation status of the bilge pump and stop it! b Set the selector switch to the "automatic" position, when the surface of the bilge ditch reaches the high level, the bilge pump should start automatically, and the operation indicator light should be turned on. When the surface of the bilge ditch drops to the low level, the bilge pump should stop automatically and the operation indicator light should go out. 5.2.3 Test of automatic oil drain device of bilge water oil-water separator Before carrying out the action test, fill the required oil into the oil-water separator with bottom water to make the oil-water separator work: when the oil-water interface drops to reach the oil drain level, the drain electromagnet should open automatically; when the water-oil interface rises to the stop position, the oil drain electromagnet should close automatically, and at the same time check whether the indicator light on the control box is working normally. The interface between water and air can also be used instead of the oil-water interface light to carry out the above test. 5.3 Water supply and sanitary water system construction 5.3.1 Water system start and stop test 5.3.1.1 For the pressure cabinet method, according to GB 1156ES, fill the pressure cabinet with compressed air to the cut-off pressure (generally 0.1MPa) and use a water pump to pump water to the design working pressure (generally 0.4Mpa). Open the valve and slowly release the water so that the positive pressure in the pressure cabinet drops to the set residual pressure. When the pressure drops to the set residual pressure, the water pump will automatically stop. Close the relief valve, the pressure in the water supply cabinet rises, and when the pressure inside the cabinet reaches the set pump stop pressure value, the water pump should automatically stop. Also, let the water pump run smoothly. The pressure inside the pressure cabinet should be consistent with the set value when the water pump starts and stops. 5.3.1. 2 heavy J cabinet type
8. Fill the water tank with water, then open and supply water or drain the water, the water level in the cabinet will drop due to gravity. When the water level in the cabinet drops to the new water start level, the water tank should start automatically, and use the water pump to resupply water to the water tank. When the water level in the cabinet rises to the high-set pump stop level, the water tank should stop automatically.
Additional instructions
This standard is proposed by China State Shipbuilding Corporation and is under the jurisdiction of Shanghai Ship Design and Research Institute. Shanghai Ship Design and Research Institute is responsible for the drafting of this standard.
This standard is a practical ship test method for automatic control of compressed air, bottom water, fresh water and sanitary water systems for small and medium-sized ships, industry standard 115F806-1H79
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