Non negative pressure variable frequency water supply equipment, non negative pressure water supply equipment, pipeline network pressure stabilizing flow water supply equipment

Description :

Non negative pressure variable frequency water supply equipmentInstallation Instructions

　　1. The equipment should be installed on a foundation with a strength of not less than C20 and have drainage facilities and maintenance channels around it;

　　2. The installation location of the equipment should be chosen in a relatively dry environment, avoiding outdoor environments to prevent damage to electrical components;

　　3. Before installation, carefully check whether there are any hard objects inside the pump body to avoid damaging the impeller and pump body during operation;

　　4. During installation, pipelines are not allowed to be added to the pump to prevent deformation and affect normal operation;

　　5. Connect in order according to the installation drawings, seal the connections, and do not forcefully install. When the diameter of the main pipe is large, support should be added to avoid stress;

　　6. Tighten the anchor bolts to prevent vibration during start-up from affecting the performance of the pump;

　　7. Install regulating valves on the inlet and outlet pipelines of the pump, and install pressure gauges near the pump outlet to control the pump's operation within rated conditions and ensure its normal use;

　　8. The experimental pressure of the pipeline system is 1.5 times the rated pressure and maintained for more than 5 minutes. During the pressure testing process, there must be no cracks, dripping, leakage, or seepage in the pipeline system;

　　9. If a check valve is installed in the discharge pipeline, it should be installed outside the gate valve; The construction of radiation wells for variable frequency tower free water supply equipment includes two parts: the construction of collection wells and the construction of radiation pipes. The construction of water collection wells is similar to that of large mouth wells, and the sinking well method is often used for construction. It is worth pointing out that before the wellbore sinks, the reserved casing on the wellbore wall for tower free water supply needs to be blocked with wooden plugs. After the wellbore sinks to the design elevation, the construction route is constructed by removing the wooden plugs and carrying out the construction of the radiation tube. The construction methods of tower free water supply radiation pipes mainly include manual hammering, frequency conversion water supply equipment hammering method, jack method, water jet method, etc. The manual hammering method usually uses a 12-18 pound hand hammer, and the variable frequency water supply equipment manually drives a radiation tube with a diameter of 50-75 millimeters into the aquifer. The non tower water supply pipe head at one end of the hammering should be equipped with a specially designed soft steel top cap. This method is commonly used for the construction of radiation wells in towns and villages. The hammering method involves lifting a hammer weighing 100-150 kilograms and using a moving hammer to push the radiation tube into the aquifer. The pressure tank jack method uses 20-80 tons of hydraulic pressure or a screw jack. Push the tower free water supply radiation pipe into the aquifer. The water jet method is to punch holes with high-pressure water and use a zipper crane or other methods to push the pipe into the aquifer.

　　10. The installation methods of pumps are divided into rigid connection installation and flexible connection installation.

Non negative pressure variable frequency water supply equipment, pipeline network pressure stabilizing water supply equipment

　　1. Intelligent control method, using advanced intelligent control equipment and technology, automatically controls the working conditions of water pumps and the flow state of water bodies, fundamentally eliminating the conditions for negative pressure generation, so that negative pressure will not be generated instead of being eliminated afterwards.

　　2. Pre pressure method, non negative pressure (pipe network stacking) variable frequency water supply equipment pre adds a certain pressure in the gas chamber of a rubber diaphragm pressure tank with upper inlet and lower outlet, which can be achieved by applying pressure with an air compressor or nitrogen cylinder. Maintaining a certain pressure at the inlet of tap water limits the water intake and does not create negative pressure in the pipeline; It not only achieves the purpose of boosting but also does not cause negative pressure on other water users in the pipeline network. It ensures that the tap water in the pipeline network is not polluted and can fully utilize the original water pressure of the pipeline network, resulting in significant energy-saving effects.

　　3. The buffer tank replenishment method can be used to avoid the pulsation phenomenon of the variable frequency water supply equipment pipe network without negative pressure (pipe network superposition). An air tank can be connected in parallel to the inlet pipe of the water pump. The tank stores the potential energy of the pipe network pressure and the water level height in the tank. When the water column separation suddenly occurs at the suction port of the water pump due to the transient flow state, the air tank supplies flow to the water pump port. Due to the supply function of the air tank, the negative pressure in the pipe is controlled above the gasification pressure of the water body, thereby eliminating the negative pressure and disrupting the conditions for water column separation and re bridging. This enables the control of water flow pulsation or water hammer pressure rise, which plays an important role in the safety and stability of pipeline operation.

　　4. The method of adding air, if one or a group of suction valves are installed on the top of the closed water tank of the variable frequency water supply equipment without negative pressure (pipe network pressure), the suction valve can be opened to suck in the atmosphere when the pumping flow rate of the water pump is greater than the inlet flow rate of the pipe network and a vacuum is generated, making the closed water tank an open container under atmospheric pressure, thus eliminating negative pressure and limiting the flow rate of the pipe network to below the critical flow rate of negative pressure pumping. The technology and device of this commonly used suction and exhaust valve are obviously mature and effective, so the "air replenishment method" has become a common method to eliminate negative pressure.

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• Non negative pressure variable frequency water supply equipment