In the process of import and export of materials, the left and right sides of the diaphragm force, up to 4800kN, due to continuous alternating force, easy to damage the crack, the diaphragm pump diaphragm design life 8000h, working pressure 6MPa, diaphragm pump diaphragm is easily damaged The reasons are as follows:
Ultrasonic Heat Meters(Ultrasonic Calorimeters) are kind of energy meters measuring the flow rate and heat exchange through the ultrasonic method. The ultrasonic Heat Meters get the heat consumption value through the temperature sensors. The ultrasonic heat meters are mechatronic product based on the microprocessor and high precision sensors. Comparing with the Water Meters, electornic meters and gas meters, the ultrasonic heat meters need much more complicated designs and higher technology demand. Ultrasonic heat meters is kind of high technology products with mechanism, electronics and information technology. At present, the ultrasonic heat meters are more often used in many industries,through Ultrasonic Heat Metering,can accurate to do what you want.
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1. The air in the diaphragm chamber is not clean. The volume of the gas changes with the pressure of the propellant and forms a hammer. The local stress of the diaphragm increases and the diaphragm breaks.
2. Because the diaphragm chamber is of a certain volume, if the feeding is unstable and the pressure is low, the material level of the feed compensator is less than 12m. The material level in the voltage stabilizing device is not normal, and the slurry in the pump is separated to form a gap during feeding. Insufficient material, empty pump, hammering or impact, or even cavitation, make the diaphragm subjected to increased stress, increase the frequency, cause diaphragm fatigue damage or breakdown.
3. The feed contains 3-8mm stones or large pieces of material and the mass percentage of the solids in the slurry exceeds 2%, causing a valve to be trapped, causing pump pressure to fluctuate, or due to the valve cone being misaligned when the valve is assembled, causing a thorn valve, resulting in The momentary strain of the diaphragm increases; it causes rupture.
4. The feed temperature exceeds the specified 100°C, accelerating the aging of the separator, and at the same time, steam bubbles are generated in the slurry. When the gas enters the diaphragm chamber or the unloading valve leaks, the pressure of the propelling fluid decreases, both causing uneven force distribution and fatigue damage to the diaphragm.
5. The feeding and discharging of the diaphragm chamber is controlled by the probe detecting the position of the control lever. If the magnetism of the magnetic ring on the control lever is weak, the probe cannot detect the signal, and the oil cannot be filled in time, resulting in excessive force on one side of the diaphragm. And it broke.
6. Diaphragm control rod bearing sleeve wear is serious, so that the control rod eccentric, sink, diaphragm force increases, easy to pull the split diaphragm.
7. The differential pressure of the unit caused the diaphragm pump to overpressure, and the diaphragm suffered a rupture due to an increase in instantaneous force.
8. Cross head, piston or cylinder liner lining loose, piston head hammer caused by incorrect installation of crosshead guide rails, crosshead bearings, etc. will cause hydraulic imbalance; frequent pump trips will also cause the diaphragm to be subjected to extreme force momentarily. The diaphragm ruptured.
9. The nitrogen package is precharged with 2.2 MPa of nitrogen and has a good damping effect. During operation, the pressure reflected on the pressure gauge is the operating pressure rather than the pressure of the nitrogen package (only visible when the pump is stopped). If the nitrogen package is damaged or the pressure is reduced during operation, the diaphragm pump will operate without damping, which will result in Hydraulic imbalance, diaphragm easy to damage and damage.
10. The diaphragm itself has poor quality, no elasticity, and low material strength.
Ultrasonic heat meters are consisting of flow rate sensor, temperature sensor and calculator, which has the advantages in high tense construction and easy installation. We adopt the quality ceramic transducers which guarantee the high accuracy and stability of the ultrasonic heat meters. The ultrasonic heat meters have the characteristics as following: non mechanical movement, non wear and tear, non influence from the bad quality water and low cost maintenance; horizontal or vertical installation; installed in inlet water tube or return water tube according to customers` request (should be chosen in advance); adding the RS485 according to customers` demand to reach the aim of remote meter reading in order to be centralized management.