A chemical pump Overview Chemical pump for bottles, barrels, cylinders, pools or other containers to extract corrosive liquids. Chemical pumps are widely used in chemical, petroleum, metallurgy, light industry, synthetic fiber, environmental protection, food, medicine and other departments. Chemical pump with stable and reliable performance, good sealing performance, handsome in appearance, easy to use maintenance and so on. To improve product quality, reduce run, run, drip, drain, prevent pollution, improve the environment, play a big role. Chemical pump for chemical, petroleum, metallurgy, power plants, food, pharmaceuticals, synthetic fibers and other departments transport temperature in a variety of corrosive media or physical, high chemical medium centrifugal pump. Chemical pump products are: a variety of fiberglass chemical pump, corrosion-resistant plastic pump, high temperature chemical pump, standard chemical process pump, magnetic drive pump, magnetic pump. Chemical pumps are used to pump clean water and contain abrasive materials that are harmful to ordinary pump materials, suspended, non-explosive materials that corrode stainless steel materials; chemical pumps are also widely used for water supply; , Air conditioning, cooling and circulation system; for civil and industrial use; for fire fighting; for irrigation; for daily use and for civil, industrial, horticultural and irrigation purposes; for stormwater savings projects; for applications where low noise is necessary For pressurized, suitable for conveying corrosive, explosive, granular water or liquid; suitable for pipe network supercharged; Centrifugal pumps that pump water automatically without filling the suction line with water are called self-priming pumps. Self-priming pump structure of many types, of which, outside the mixed self-priming pump works is: before starting the pump filled with water in the pump housing (or the pump itself has water). After the start of high-speed rotation of the impeller so that the impeller channel flow of water to the volute, then the entrance to form a vacuum, the inlet valve against the open, the suction pipe into the air within the pump and reach the outer edge of the impeller channel. On the other hand, the water drained by the impeller into the gas-water separation chamber flows back to the outer edge of the impeller through the left and right return holes. Left back to the water hole back to the water under the pressure difference and the role of gravity, fired into the impeller channel, and was crushed by the impeller, multi-stage pump and suction pipe air mixture, thrown to the volute, to the rotation The direction of flow. Then merge with the water from the right backwater hole, moving the diaphragm pump down the volute. As the liquid in the volute continuously impact cascades, constantly being crushed by the impeller, with strong air mixing, generating gas and water mixture, and continue to flow so that gas and water can not be separated. The mixture is peeled off the tongue at the volute outlet and enters the separation chamber along the stub tube. The air in the separation chamber is separated and drained by the outlet pipe, while the water is still flowing back and forth to the outer edge of the impeller through the return holes and mixed with the air in the suction pipe. So repeated cycles, and gradually sucked into the air exhaust pipe, so that water into the pump screw pump to complete the process of self-absorption. Internal mixed self-priming pump, working principle and external mixed self-priming pump the same, the difference is that the return water does not flow to the outer edge of the impeller, and flow to the impeller entrance. Internal hybrid self-priming pump at start-up, to open the back of the impeller before the return valve, so that the liquid pump back to the impeller inlet. The water is mixed with the air from the suction pipe under the action of high speed rotation of the impeller to form a gas-water mixture to be discharged to the separation chamber. Here the air is drained and the water returns from the return valve to the impeller entrance. So repeated until the air exhausted, sucked in water. The self-priming height of the submerged pump is related to the impeller seal clearance, the number of revolutions of the pump, the height of the liquid in the separation chamber and other factors. The smaller impeller seal clearance, the greater the self-priming height, generally taken as 0.3 to 0.5 mm; in the gap increases, in addition to self-priming height drop, the pump head, the efficiency is reduced. Pump self-priming height with the impeller circumferential speed u2 increases the vacuum pump, but to the maximum height of self-priming, the number of revolutions increased self-priming height will not increase, this time only shorten the self-priming time; when the turn When the number of decline, self-priming height with the decline. The self-priming height also increases with increasing reservoir height (but not beyond the optimal reservoir height of the separation chamber), with all other conditions remaining constant. In order to better self-priming pump gas and water mixing, the impeller blade to be less, so that the blade pitch increases; and should be used semi-open impeller (or impeller channel wider impeller), so that more Easy backwater depth into the impeller cascade. Most of the self-priming pump and internal combustion engine supporting, mounted on a mobile car, suitable for field operations. Three oil pump overview 1. The oil pump is suitable for conveying all kinds of oil, such as heavy oil, diesel oil and lubricating oil. With copper gear, it can deliver low liquid inside point, such as gasoline and benzene. The unit also produces stainless steel gear pump which can transport drinks and corrosive liquids. 2. At the same time the pump can be applied to hard particles or fibers, suitable for a variety of viscosity. The temperature can be as high as 300 ℃, if you need to transport high temperature liquid, please use the high temperature resistant gear pump to transport the liquid under 300 ℃. 3. Pump a variety of pump-type structure is simple and compact, easy to use and maintain, with good self-priming, to help each pump before opening without pouring liquid. 4. Some pump lubrication is delivered automatically by the liquid, so the daily work without additional lubrication.