The insulated asphalt pump uses compressed air as the power source. For various corrosive liquids, liquid with particles, high viscosity, volatile, flammable, highly toxic liquid, can be selected for the specific selection of the exhausted and insulated asphalt pump. And the method of extending the service life The insulation asphalt pump uses compressed air as the power source. For various corrosive liquids, liquid with particles, high viscosity, volatile, flammable and highly toxic liquid can be exhausted. In the specific selection of insulation asphalt pump, it can be considered from the following aspects: Rivet Screws, Blind Rivet Nuts, Stainless Steel Rivet Nuts Ningbo Brightfast Machinery Industry Trade Co.,Ltd , https://www.brightfastener.com
(1) The shape of the spool is mainly based on factors such as the selected flow characteristics and unbalanced forces.
(2) Abrasion resistance When the fluid medium is a suspension containing a high concentration of abrasive particles, the valve core and the valve seat joint face are severely rubbed each time they are closed. Therefore, the flow path of the valve should be smooth and the internal material of the valve should be hard.
(3) Corrosion resistance Because the medium is corrosive, in the case of meeting the adjustment function, try to choose a simple valve.
(4) Temperature and pressure of the medium When the temperature and pressure of the medium are high and the change is large, Botaibang should select the valve whose material of the valve core and the valve seat is changed by temperature and pressure.
(5) Prevention of flashing and cavitation Flashing and cavitation are only produced in liquid media. In the actual production process, flashing and cavitation not only affect the calculation of the flow coefficient, but also generate vibration and noise, so that the service life of the valve is shortened, so the valve should be prevented from flashing and cavitation when selecting the valve.
Overview of insulated asphalt pumps:
The insulated asphalt pump consists of an actuator and a valve. Using compressed air as the power source, for various corrosive liquids, liquid with particles, high viscosity, volatile, flammable, highly toxic liquid, can be exhausted. It is suitable for placement in a variety of special occasions to pump media that cannot be pumped by conventional pumps. Insulation asphalt pump actuators are available with pneumatic actuators and electric actuators. Models are BWCB insulated asphalt pumps and 3GQGB asphalt pumps. The main body (valve body) of the thermal insulation asphalt pump has four kinds of materials: plastic, aluminum alloy, cast iron, stainless steel "target=_blank> stainless steel, which are selected according to the requirements of liquid or gaseous medium.
Specific selection method of thermal insulation asphalt pump:
1. The mode of action of the insulated asphalt pump The mode of action of the insulated asphalt pump is only available when the pneumatic actuator is selected. The mode of action is formed by the combination of the positive and negative action of the actuator and the positive and negative action of the valve. The choice of the mode of action of the insulated asphalt pump is mainly considered from three aspects:
(1) Process production safety;
(2) characteristics of the medium;
(3) Guarantee product quality and economic loss.
Method for prolonging the service life of the insulated asphalt pump 1. The pump body of the thermal insulation asphalt pump is operated at a high temperature, and the hinged support should be provided on the piping during the cold installation to prevent the displacement of the piping after the temperature rise.
2. The melt filter behind the pump outlet should be replaced regularly. Do not operate at high pressure or even upper pressure limit for a long time. 3. Regular replacement of bearings can save maintenance costs. When it is found that the wear of the inner surface of the shaft or bearing is close to the thickness of the hardened layer, the shaft can be ground and used again, and only the bearing can be replaced, which can extend the life of the pump shaft by 8 to 10 years. 4. In case of power failure or heat medium circulation If the interruption exceeds 3Omin, the insulated asphalt pump should be disassembled and reassembled to avoid damage to the pump due to poor lubrication of the melt due to solidification, cracking, etc.
5. The coupling must be hot after the pump body is warmed up to avoid additional torque during operation.
6. The pump outlet pressure measuring point should be set to stop the alarm. Otherwise, once the discharge pipe is blocked, the pump body is easily damaged.
7. When the insulated asphalt pump starts, when the outlet is not under pressure, do not blindly increase the speed to prevent premature damage of the shaft or bearing.
8. When cleaning the pipetting, do not use the pump to transport the cleaning solution. The internal parts should be removed and installed after the pipetting is finished, so as to avoid foreign matter in the pump.
9. The temperature of the heat medium jacket of the insulated asphalt pump body can be slightly lower than the temperature of the heat medium of the front and rear casings. Because the melt viscosity and the shear rate are in a decreasing function, the extrusion of the gear, the shearing of the bearing will cause the melt temperature to rise by 3 to 5 ° C after the pump, and lowering the temperature of the heat medium can prevent melt degradation. The data shows that by reducing the temperature of the bearing zone, the bearing capacity of the bearing can be greatly increased, there is no need to replace the large-capacity pump, and the output capacity of the insulated asphalt pump can be increased by 50% simply by increasing the rotational speed.
10. Speed ​​up slowly, do not let the front and rear pressure rise sharply, so as not to damage the bearing or block the lubrication passage.
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Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn