Simply analyze booster pump self-control valve fault
Offline UPS,Power Supply,Online High Frequency UPS Bison Machinery Co., Ltd. , http://www.tzengine.com
1) When the pump is on, a light-load process must be required to prevent the backpressure in the pipe network from acting on the impeller of the pump under the condition that the check valve in front of the pump is opened at an excessive speed. When the pump is over load, the current is too large, causing the motor to burn, the pump shaft bending, so if you want to achieve this process, in the traditional operation process, you must first open the pump until the pump reaches a certain speed, the outlet to achieve Back pressure can be overcome under the open, known as: first open the pump, open the valve. Control of this process can only be achieved by setting up an electric valve and a delay pump connection, which is done manually without the electric valve, but the electric valve often fails or is inaccurate due to the delay, and the manpower can not at all Accurate control of the slow release time, often make this light load failure, resulting in frequent motor and pump failure, and this way labor, laborious, unreliable, can not be achieved in the true light load. 2) In the pump to stop pumping, in order to prevent the impact of water hammer on the pump and outlet check valve, often first close the control valve, then stop the pump, in this case, if a sudden power failure, the electric control valve can not be shut down in time , Manual valve can not rely on manual closure within a very short period of time, coupled with the check valve closed lax, it will make the pump reversing non-stop, or water hammer accident. 3) The check valve at the outlet of the pump, under the impact of water hammer pressure, often appears to be closed and the valve plate broken. It is simply impossible to eliminate a water hammer by relying solely on a water hammer eliminator, so there is an urgent need for a device that completely eliminates water hammer. Tianjin Guowei Drainage Equipment Manufacturing Co., Ltd. production of booster pump control valve is developed for some of the shortcomings of the above production, can solve some of the above problems, and without human and electrical operation, is a new energy-saving products. After the designers and company leaders contacted the self-control valve of booster pump, after careful investigation and detailed analysis and comparison, they reached the same conclusion: The biggest drawback of the micro-resistance slow-closing check valve is that it is closed and the damage rate is very high, often Is used once or several times, the valve will be damaged, to be repaired, and this new hydraulic valve can replace multiple valves, that is, only one valve can completely replace the electric valve, micro-slow closing check valve and exhaust Full valve function. Therefore, the actual installation decided to use the valve. The product is easy to install, simply install the valve in the pump outlet, and then add a valve repair, without any electrical components supporting, you can completely eliminate the water hammer, eliminating the need for water hammer eliminator, greatly saving The installation space. Booster pump control valve is divided into three parts: the main valve, the diaphragm control room and the bypass pipe to diaphragm for the sector, the diaphragm above the cavity, and the drainage pipe connected to the diaphragm below the lower chamber, And the valve inlet pipe connected to the small valve plate fixed to the valve stem, the large valve plate on the slide up and down. When the motor is started, the pressure at the inlet of the valve gradually increases. Pressure water: 1) The force that pushes the large valve plate upward is generated, and the valve can not be opened immediately because the diaphragm controls the back pressure of the upper chamber. 2) pressure through the bypass pipe into the diaphragm control chamber lower chamber. As the water inflow into the lower chamber increases, when the pressure in the lower chamber is greater than the pressure in the upper chamber, the lower chamber pressure water urges the diaphragm to move upward, whereupon the small valve plate does not exert pressure on the large valve plate. 3) The large valve plate has a force to promote its upward movement, in the role of these two forces, the valve gradually opened, so as to achieve the pump light load, close the brake, slow open the purpose. When a sudden power outage or accident stop pump or normal stop pump, the water pressure at the inlet of the valve decreases, and the large valve plate also decreases. When the flow rate is zero (ie, the flow velocity at the water inlet is zero), the large valve plate Due to its own gravity and the rapid closure (time 3s ~ 5s), to prevent most of the water back, this time around the valve to form a water pressure, pressure water on the one hand through the small pressure relief valve at the bottom of the three pressure relief slots. 4) pressure water from the bypass pipe into the diaphragm control chamber on the chamber (this process for the suction chamber, can effectively absorb part of the water energy), when the cavity pressure water is greater than the lower chamber, the pressure of water to promote the diaphragm to move down, When all the pressure in the lower chamber is squeezed out, the small valve plate will slowly descend and resume to the standby state. During this process, the slow closing time can be adjusted (3s ~ 150s). At that time, the valve plate will be fully closed and the dripping water will not leak. It is precisely because of its shut down with a quick closure, linear pressure relief, pressure chamber and slow closed four kinds of water hammer to eliminate the function, so stop without noise, the effect is very good. The new hydraulic valve features are: 1) without artificial, no electricity, completely automatic, depending on the pump start and stop when the pressure generated by the upper and lower chamber to achieve automatic operation and control, to achieve water supply automation provided favorable conditions. 2) Both the control valve, check valve and water hammer eliminator three functions, but also has a linear pressure relief function, saving installation space, to some extent reduce the loss. 3) wide body design. The minimum flow of the valve is 1.1 times the diameter of the valve, the maximum at more than 2 times the opening and closing pressure is low, so that in the work process, the head loss is small, the pressure loss is small. Booster pump in the use of pressurized pump room can completely eliminate the water hammer. In summary, the application of booster pump in pressurized pump room can save installation space, reduce losses and effectively and completely eliminate water hammer, reduce the accident rate, and economically feasible, so that the heart of water supply enterprises safe and reliable beating .