All relevant units: According to the requirements of the "Evaluation Measures for Technological Small and Medium sized Enterprises" (Guoke Fazheng [2017] No. 115) and the "Guidelines for the Evaluation Service of Technological Small and Medium sized Enterprises" (Guoke Huozi [2022] No. 67), the eighth batch of 4005 planned technology-based small and medium-sized enterprises in our province in 2022 has been publicly announced on the "National Information Service Platform for Technological Small and Medium sized Enterprises" for 10 working days, The list of 3990 technology-based small and medium-sized enterprises in the eighth batch of 2022 will be announced through public announcement.

Mechanism and Principle of Ceramic Plunger Pump A. The ceramic plunger pump is composed of ceramic metering components (including ceramic plunger pump sleeve, plunger, slot valve metering rod), stainless steel inlet and outlet nozzles, and connecting components. B. The working principle of zirconia ceramic plunger pump 1. The downward linear activity of the ceramic column breeds negative pressure and sucks in liquid; 2. The upward linear activity of ceramic columns breeds positive pressure and squeezes out liquids. Good performance of ceramic plunger pumps 1. Extremely inert metal oxides, resistant to acid and alkali corrosion, high temperature resistance, and compliance with repeated disinfection and sterilization under high temperature conditions; 2. Ultra high material hardness: wear resistance, long service life (5-8 times that of chrome plated steel pumps), and minimal particle release. 3. The crystal layout exhibits zero porosity and dense material quality: the product appearance is extremely smooth, with minimal friction and minimal drug residue; 4. Minimal thermal expansion: The plunger gap is smaller, allowing for continuous operation without liquid, higher filling accuracy, and online washing and sterilization.

Corrosion resistant magnetic pump is a special type of magnetic pump mainly used for transporting liquids with corrosive media. Compared with ordinary magnetic pumps, corrosion-resistant magnetic pumps have higher corrosion resistance and wear resistance, and can operate stably in harsh working environments. Corrosion resistant magnetic pumps are usually made of special materials, such as polypropylene, fluoroplastics, ceramics, stainless steel, etc. These materials have good corrosion resistance and wear resistance. At the same time, the sealing structure of the corrosion-resistant magnetic pump has also been specially designed to effectively prevent leakage and media leakage, ensuring work safety and environmental protection. Corrosion resistant magnetic pumps are suitable for industries such as chemical, petroleum, pharmaceutical, electroplating, and power. They are mainly used to transport liquids with strong corrosive media such as acid, alkali, hydrochloric acid, sulfuric acid, hydrofluoric acid, sodium hydroxide, and organic solvents. Due to its high safety, stability, and reliability, it is widely used in the transportation of corrosive liquids in industrial production.

1. Working principle and structural characteristics of filter lift pump The drive of an ordinary centrifugal pump is to connect the impeller shaft of the pump with the electric shaft through a coupling, so that the impeller and the electric motor rotate together and work. The filter lift pump is an unsealed pump, and both the pump and the driving motor are sealed in a pressure vessel filled with the pumped medium. This pressure vessel is only statically sealed, and is provided with a rotating magnetic field by a wire group to drive the rotor. This structure eliminates the rotary shaft sealing device that traditional centrifugal pumps have, so it can achieve no leakage.

Safety and service life of products with corrosion-resistant magnetic pumps Metal and plastic corrosion-resistant magnetic pumps mainly transport various chemical media. Its safety is very important. It will involve whether the chemical solution will leak, whether the leaked chemical will cause explosions, casualties, environmental pollution, etc.

There are many types of self priming pumps, among which the working principle of the external mixing self priming pump is to fill the pump casing with water (or to store water within the pump casing) before starting the centrifugal pump. After startup, the high-speed rotation of the impeller causes the water flow in the impeller channel to flow towards the vortex shell. At this time, a vacuum is formed at the inlet, causing the inlet check valve to open. The air in the suction pipe enters the pump and reaches the outer edge through the impeller channel. On the other hand, the water discharged into the gas-water separation chamber by the impeller flows back to the outer edge of the impeller through the left and right return holes. The water flowing back from the left return hole, under the action of pressure difference and gravity, shoots into the impeller channel and is crushed by the impeller. After mixing with the air from the suction pipeline, it is thrown towards the volute, and the corrosion resistant pump, acid resistant pump, and fire pump of the submerged pump move in the direction of rotation. Then it converges with the water flowing from the right backwater hole and moves along the snail shell. Because the liquid continuously impacts the cascade inside the volute and is constantly crushed by the impeller, it is strongly stirred and mixed with air, resulting in a mixture of gas and water, and constantly moving, causing negative gas and water to be unable to separate. The mixture is separated by the tongue at the outlet of the volute and enters the separation chamber along the short tube. The air in the separation chamber is separated and discharged through the outlet pipe, while the water still flows towards the outer edge of the impeller through the left and right return holes and mixes with the air in the suction pipe. Repeat the cycle and gradually exhaust the air in the suction pipeline, allowing water to enter the pump and complete the self priming process. Sewage pump, self priming pump, oil pump The working principle of an internal mixed self priming pump is the same as that of an external mixed self priming pump, except that the return water does not flow to the outer edge of the impeller, but rather to the inlet of the impeller. When starting an internal mixing self priming pump, the reflux valve below the front of the impeller must be opened to allow the liquid in the pump to flow back to the inlet of the impeller. Under the high-speed rolling action of the impeller, water mixes with the air from the suction pipe, forming a gas-water mixture that is discharged into the separation chamber. Here, the air is discharged and the water returns from the return valve to the impeller inlet. Repeat this process until the air is exhausted and water is sucked in.