The control system of Jiangsu ship air compressor is analyzed. The control design of the main air compressor on Heyong Taizhou Port Ship Co., Ltd. and Jiangsu Taizhou 225321000 claw bulk carrier is taken as an example. The two airs found in the process of designing the main air compressor are analyzed. The sequence control of the press and the non-correspondence in the remote control, and propose a solution.

1 Introduction to the configuration of the main air compressor The ship is equipped with two main air compressors with a capacity of about 200 513 states. Two air compressors are equipped with one start control box, and the air compressor No. 1 is automatically controlled by a pressure switch. When the pressure is lower than 2.4, it will automatically start. When it reaches 3, it will stop automatically. The air compressor No. 2 will be automatically controlled by the pressure switch. When the pressure is lower than 2.213, it will start automatically. When it reaches 3 positive, it will stop automatically.

2 The sequence control of the air compressor Under normal conditions, when the air bottle is filled with air, as the pressure drops, when the pressure is lower than 2.41, the pressure switch No. 1 will automatically start the No. 1 air compressor, and the number is The operation of the air compressor, the pressure in the air bottle also rises, and finally reaches 31. It can be seen that in this case, the air compressor will be in working or waiting state, and the air compressor No. 2 will be long-term. In standby. Only when the No. 1 air compressor fails, the pressure in the air bottle continues to drop. When the pressure is lower than 2.213, the No. 2 pressure switch will automatically start the No. 2 air compressor. From the perspective of equipment use and maintenance, this This situation is obviously not reasonable.

In order to solve the equilibrium operation between the above two main air compressors, the pressure switch is lower than 2.2; when the action is increased, only the selection of the switch box can easily change the equalization operation of the above two air compressors, meaning 1.1 in 38 It is the terminal number; 16 is the changeover switch contact number; 1 is the selection switch position 1; 2 is the selection switch position 2; 2 is the 1st and 2nd pressure switch, the working principle is as follows when the selector switch is at position 1, No. 1 pressure switch controls No. 1 air compressor, No. 2 pressure switch controls No. 2 air compressor; When the selection switch is in position 2, No. 1 pressure switch controls No. 2 air compressor, No. 2 pressure switch controls No. 1 air compressor The machine can be seen that when the selector switch is at position 2, the pressure switch of No. 1 will be activated as the pressure drops to 2.4, and at this time, the air compressor No. 2 will start running, thus changing the direct start of No. 1 air compressor. Operation situation Therefore, the crew can let another air compressor run for a period of time after operating the air compressor for a period of time. By operating the selector switch to make the two main air compressors alternately operate, the running time of the two air compressors can be balanced, and the operation and maintenance of each air compressor can be optimized.

3 remote control of the air compressor remote control 2 main air compressor remote control asked, at the beginning of the design, with reference to the manufacturer's information, proposed 2 design scheme 2, 052 is the No. 1 No. 2 air compressor control box; For the cable number; 3 core 1.52 for the cable specification, the selection switch in the switch box, found that when the selector switch is at position 1, when there is no air compressor, it is found that the actual start is the No. 2 air compressor Similarly, if the No. 2 air compressor is started remotely on the control console, when the actual start is 2, the remote control serial number of the air compressor on the control console and the actual operation of the air compressor serial number will not be analyzed. The question that arises in the middle is easy to bring misleading trouble to the crew and even the control of the safety hazard of the air compressor, that is, whether the selector switch is located at position 1 or position 2, such as remote control of 2 air compressors on the control console It will always keep the No. 1 remote control corresponding to the No. 1 air compressor, and the No. 2 remote control corresponds to the No. 2 air compressor, which avoids the confusion and safety hazard of the crew's future operation. The actual ship test results show that the design of 3 completely achieved the expected effect. 4 Conclusion The control system design of the air compressor on the bulk carrier of 0000 satisfies the requirements of the shipowner.

The control of the air compressor is not complicated, but the design of the main air compressor should be based on the actual use, and the design should be carefully analyzed to avoid potential problems or hidden dangers.

There are five general body styles of Ball Valves: single body, three-piece body, split body, top entry, and welded. The difference is based on how the pieces of the valve-especially the casing that contains the ball itself-are manufactured and assembled. The valve operation is the same in each case.

In addition, there are different styles related to the bore of the ball mechanism itself.

Ball Valves in sizes up to 2 inch generally come in single piece, two or three piece designs. One piece ball valves are almost always reduced bore, are relatively inexpensive and generally are throw-away. Two piece ball valves are generally slightly reduced (or standard) bore, they can be either throw-away or repairable. The 3 piece design allows for the center part of the valve containing the ball, stem & seats to be easily removed from the pipeline. This facilitates efficient cleaning of deposited sediments, replacement of seats and gland packings, polishing out of small scratches on the ball, all this without removing the pipes from the valve body. The design concept of a three piece valve is for it to be repairable.

Ball Valves

Stainless Steel Ball Valves, Brass Ball Valves, Sanitary Ball Valves, Water Ball Valves

ZHEJIANG KINGSIR VALVE CO., LTD. , https://www.kingsirvalve.com