What is the problem that the air supply pressure in the factory is lower at night than during the day?

The plant air supply pressure is lower at night than during the day, which may be caused ambient temperature changes, equipment operating status, piping system problems, changes in user requirements, or external interference and other reasons, the following is a specific analysis:

effect of 1. ambient temperature changes

1. temperature difference between day and night causes pressure fluctuation:
   • sunlight during the day increases the temperature of the oil tank or gas source equipment, the internal gas expands, and the pressure rises.
   • The temperature drops at night, the gas shrinks, and the pressure decreases. This pressure change is particularly evident in areas with large diurnal temperature differences.
   • For example, the pressure in the oil tank slowly rises from sunrise in the morning and reaches a peak at about 2 p.m.; then gradually decreases and reaches a minimum at about 2 a.m.
2. Effect of seasonal temperature difference:
   • lower temperatures at night in winter may lead to a more significant drop in air supply pressure.
   • Although the night temperature is high in summer, the temperature difference between day and night is relatively small, and the pressure fluctuation may be relatively moderate.

Influence of 2. equipment running status

1. unstable operation of air compressor:
   • as the core supply equipment of air source, the operation state of air compressor directly affects the stability of air supply.
   • Air compressor failure (such as piston wear, belt slack, valve damage, etc.) or maintenance is not timely, may lead to unstable gas supply, thereby affecting the air source pressure.
   • For example, a factory has been due to air compressor valve sealing is not tight, resulting in frequent fluctuations in ash gas source pressure.
2. Abnormal pressure of gas tank:
   • the gas storage tank is an important part of stabilizing the pressure of the gas source. If the pressure of the gas tank is abnormal (such as pressure gauge failure, safety valve failure, etc.), it will not be able to buffer and stabilize the pressure.
   • For example, the failure of the reservoir safety valve may cause the system pressure to continue to rise or fall.

Impact of 3. Piping System Problems

1. pipeline leakage:
   • leakage and blockage may be caused by poor sealing at pipe connections, aging pipes, and internal dust accumulation.
   • Leakage will cause the pressure of the air supply to drop, especially when the air consumption decreases at night, the influence of leakage on the pressure is more obvious.
   • For example, a factory due to a gas pipeline ball valve damage caused by pipeline leakage, the workshop gas pressure can not go up.
2. Unreasonable pipeline design:
   • too small pipe diameter or too many turning points will increase pressure loss, resulting in a drop in air pressure.
   • For example, the inner diameter of the air supply pipe is too small and too long, resulting in excessive pressure drop, and even if a larger capacity air compressor is used, the air supply may still feel insufficient.

Impact of changes in 4. user needs

1. decreased gas consumption at night:
   • factory production activities at night are reduced, and gas consumption is correspondingly reduced. If the selection of the air compressor is too large or the operating parameters are not adjusted according to the actual gas consumption, the pressure of the air source may drop.
   • For example, the actual gas pressure used by the user is 7-8kg, but the set pressure is lowered to 5-6kg or even lower through the panel, resulting in insufficient opening pressure of the rear-end pneumatic equipment.
2. Illegal use of gas or equipment failure:
   • illegal gas use or equipment failure may cause a sudden increase in gas consumption, which in turn affects the gas supply pressure.
   • For example, a user due to illegal use of gas led to insufficient gas pressure, affecting the normal production of other users.

5. the influence of external factors

1. third party construction damage:
   • third-party construction may damage the air supply pipeline or equipment, resulting in a decrease in air supply pressure.
   • For example, in a factory, the gas supply is interrupted due to the destruction of pipelines by a third party construction.
2. Impact of natural disasters:
   • natural disasters (such as earthquakes, floods, etc.) may damage the air supply system or affect the operation of equipment, resulting in a decrease in air supply pressure.
   • For example, an earthquake may cause pipe rupture or equipment damage, which may affect the gas supply.