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The anti blocking design of the impeller of the self-priming sewage pump ensures high efficiency and no blocking. Excellent hydraulic model is adopted, and the efficiency is 3~5% higher than that of general self-priming sewage pump. The self-priming height is 1m higher than the general self-priming sewage pump, and the self-priming time is shorter. The self-priming sewage pump adopts the pump body structure of axial liquid return. The self-priming sewage pump body is composed of a suction chamber, a liquid storage chamber, a scroll chamber, a liquid return hole, a gas-liquid separation chamber, etc. after the self-priming sewage pump is normally started, the impeller sucks in the liquid stored in the suction chamber and the air in the suction pipe together, and is fully mixed in the impeller. Under the action of centrifugal force, the liquid entrains the gas to flow to the outer edge of the scroll chamber, forming a white foam belt with a certain thickness and a high-speed rotating liquid ring on the outer edge of the impeller. The gas-liquid mixture enters the gas separation chamber through the diffusion tube. At this time, due to the sudden decrease of the flow rate, the lighter gas is separated from the mixed liquid, and the gas continues to rise and discharge through the pump body outlet. The degassed liquid returns to the liquid storage chamber, enters the impeller again through the return hole, mixes with the gas inhaled from the suction pipe inside the impeller, and flows to the outer edge of the impeller under the action of the high-speed rotating impeller. As this process goes on repeatedly, the air in the suction pipe decreases continuously until the air is exhausted, and the self-priming sewage pump completes the self-priming process, and the self-priming sewage pump is put into normal operation. The self-priming sewage pump is a sewage pump with a certain self-priming capacity, and its self-priming height is also limited. How to improve its self-priming height in product technology and how to improve its self-priming capacity during installation and use are the focus of our research and analysis. The self-priming sewage pump is known as a vacuum pump product that can pump water. It combines the structural characteristics of the water ring vacuum pump and the self-priming sewage pump, which can quickly generate high negative pressure and transport high proportion of chemical media. It uses the impeller, pump body and cover plate to form a multi-channel sealing chamber for rapid exhaust. It takes only 2 seconds to fill water at a height of 3 meters, and 8 seconds to fill water at a height of 5 meters. Compared with ordinary self-priming sewage pumps, it greatly improves the efficiency and replaces traditional self-priming sewage pumps in many fields. The self-priming sewage pump produced by our company has a high suction lift, which is also known as the high suction lift self-priming sewage pump. The pump shaft and motor shaft are integrated, and have better stability. It is easier to use than the oil barrel pump in barrel loading and transportation. It can not only completely transport the media at the bottom of the barrel, but also directly switch between two barrels in one second. It can work continuously by making a multi way connector at the import. The actual use cost is lower than that of the oil barrel pump. Multiphase mixed conveying technology is a practical product in the field of conveying chemical media with high viscosity and high proportion, as well as in the food and beverage industry. The general self-priming sewage pump does not need to install the bottom valve when the suction head is about 5 meters. If it is more than 5m, the suction head can be improved by adding a bottom valve at the end of the inlet, generally about 1m. The horizontal distance at the entrance and the number of elbows, especially the 90 degree angle and continuous turns, shall be minimized. Like centrifugation, irrigation and diversion can effectively shorten the self-priming time. Now the large flow self-priming sewage pump is equipped with a vacuum auxiliary device. Instead of irrigation and diversion, start the vacuum pump to exhaust, and the suction head is increased to more than 8 meters. The large-scale self-priming sewage pump produced by our company uses the latest semi open impeller and spiral impeller, which have good anti blocking ability and strong cutting function. The precision CNC machining technology allows the clearance between the impeller and the inner wall of the pump body to be as small as possible (the impeller of the cutting self-priming sewage pump is embedded in the mouth ring). The self-priming sewage pump with proper suction head can not only save cost but also meet the actual demand. What Should Be Paid Attention To In The Valves Of High And Low Temperature Circulating Temperature Control System Liquid ring vacuum pump Liquid ring vacuum pump manufacturer

The reason why traditional multi-layer and single-layer hot presses are still in the market is that their theory, design, manufacturing, technology and experience in use are mature, the structure of the press is simple, and the maintenance is relatively convenient. However, with the development of wood-based panel production, both single-layer and multi-layer hot presses are increasingly unable to meet the requirements of wood-based panel production development. Warm extrusion die vacuum heat treatment The traditional heat press, in the production line of wood-based panels (particle board, medium density fiberboard, the same below), has formed a discordant note. It makes the flow-based wood-based panel production line suddenly interrupted here. This not only caused the production takt to be unbalanced, but also had to add a series of equipment such as accelerated conveyors and fast conveyors to balance the rhythm. Weld gap for vacuum brazing In addition, the thickness of the pressed sheet is uneven, the raw material consumption rate is high, the energy consumption is large, etc, which are also the shortcomings of the intermittent hot press. In this case, people are forced to seek new types of hot pressing machinery to meet the needs of production development, so the continuous flat pressing hot press came into being. It can be said that the rise of continuous flat pressing hot press is the most important breakthrough in wood-based panel machinery in the past two decades, and it is also a powerful challenge to any traditional hot-pressing machine, which makes wood-based panel production look new. Development of Large High Temperature Vacuum Annealing Furnace

Disadvantages of modern tube furnaces (1) The strength of the furnace lining is low, and it is easily damaged by mechanical force during use; Production Management of Vacuum Quenching Furnace (2) The ability to resist airflow erosion is poor; (3) The construction environment is harsh and the quality is unstable due to the influence of human factors, so it is difficult to ensure the effect of the equipment in operation and use. Chain link vacuum quenching and tempering Castable structure The castable structure is mainly a furnace lining built with refractory materials such as heat-resistant concrete and castables. Its main advantages are good integrity and air tightness of the furnace lining, long life of the furnace lining, easy realization of mechanized construction operations, and high construction efficiency. The disadvantage is that the refractory material must be used within the validity period, and the lining repair is not as flexible as the brick lining. PCB micro-drill vacuum brazing