Water conservancy science and technology analysis of Shuikou Power Plant rapid gate hydraulic opening and closing operating system transformation Huang Juhan Fujian Shuikou, Electric Co., Ltd., Fujian Minqing 38UI repair also won the contradiction between pumping and lifting the door. Therefore, technical reform must be carried out, and the article elaborates on the technical transformation plan. I Equipment Introduction Shuikou Power Plant installed 7 models of 22315, water conservancy technology analysis of the rapid opening of the hydraulic gate of the Shuikou Power Plant operating system transformation Huangjuhan Fujian Shuikou, Electric Co., Ltd., Fujian Minqing 38UI repair also won the pump drop and lift the door contradiction. Therefore, technical reform must be carried out, and the article elaborates on the technical transformation plan.
I Equipment Introduction Shuikou Power Plant installed 7 sets of 22315,800 rotary-turbine turbines, which recorded the speed of the Yixie joint, the runaway speed, and the Feiyi speed of the Yefei non-joint working condition. For the separate water diversion unit, the inlet quick gate and the road inspection gate are set up in the water inlet. The hydraulic hoist adopts single lifting point type, the model is, 14 tearing 20014 fast gate is used to quickly close the inlet gate when the unit falls fast gate accident protection action to prevent the unit from overspeed, and the unit is used for isolation when the unit is under minor repair. Water source. The access door is used to isolate the water source during quick brake maintenance. The seven units share two maintenance doors, and the unit's quick brakes have a fast drop. The pump lowers the door and the manual fast-falling function, in which the fast-falling time is static water 27, 8. anhydrous 260 moving water 24, 8 to meet the needs of adjustment guarantee. The operating conditions are static water. The moving water is closed. When the gate descends 2001, the main chest starts to lift the gate and drops 205, when the spare dish is put in and reported 2, the equipment was put into operation in July 1993. The overall condition of the equipment has been basically good so far, but there are also some defects. The operation control valve group of the 7 sets of hydraulic cylinders of the hydraulic hoist is an integrated unit structure 1 dotted frame. If the failure of the gate control valve group of the unit needs to be repaired, the control valves of the seven units are made into one piece. The pressure oil and return oil of the 7 machines are communicated inside the valve block and cannot be isolated separately. It is necessary to drop the quick gates of all unit inlets. The whole plant was forced to stop, affecting the normal operation of all the units in the whole plant. Since 2301 is common to 7 units. This will also occur when the fault requires an overhaul. The existence of this situation is a great hidden danger to the safe and economic operation of the whole plant and even the entire system.
When the unit is overhauled, the quick brake falls, but the filling valve cannot be automatically put in place. It is necessary to start the chestnut to pressurize the upper chamber of the hydraulic cylinder to completely close the filling valve. However, if the other machine just hits 200, the automatic door lift will accelerate the electromagnetic force on both sides of the machine, so the oil pump is in an overflow state. The No. 7 cylinder 1 cavity oil is controlled to return to the fuel tank through 40 through the damped cartridge valve block 1.60 for overflow. The 7 gate is in a state of rapid decline, which accelerates its sliding speed. This type of failure has occurred in previous runs. Therefore, in the subsequent pumping process, there must be someone to monitor the lower chamber oil pressure of other units. Once I found out which unit had a sudden drop in oil pressure in the lower chamber. Stop the pump immediately. To prevent the occurrence of the above phenomenon.
During the rapid gate rapid drop, the oil in the lower chamber of the cylinder is directly returned to the upper chamber through the opening of 501. Due to the presence of the lower chamber piston rod. It causes the oil return to form a differential circuit. The oil it is poor is replenished by the fuel tank. During the operation, we observed that this replenishment would form a vacuum if it was not timely. Especially in the 1 and 7 machines far from the control room. This phenomenon is obvious because the pipeline is too long.
In the next pumping process, it usually takes a few minutes to replenish it. The original hydraulic system electromagnet action 1.
3 improvement measures 1 redesign. One set of overflow pressure regulating block is manufactured, corresponding to each set of seven independent control valve blocks, and the one-way control of the ball valve is added accordingly, so as to control the valve block of each hydraulic cylinder separately for maintenance. Does not affect the normal operation of other units 2. Hydraulic system electromagnet action 2 On each hydraulic frame of the machine, set only two check valves with a volume larger than the volume of the piston rod, so that the oil replenishment is smoother and faster.
3 This transformation also carried out hole transformation on the electrical circuit. If a unit explains the pump control drop, it will happen that the other unit will drop 200, and it will automatically increase. The electric circuit will lock the pump control and lower the priority. And from the new hydraulic control loop analysis. Even if the electrical lockout fails, the gate will not be accelerated, and the road will be locked. In addition, when the accident of a certain unit falls quickly, the function of the pump drop door of other gates is quickly explained by the lockout priority. In order to avoid the oil circuit mutual interference with the water conservancy technology working condition motor change (eight) valve electromagnet to explain the door fast drop oil chestnut start to explain the door lift ++ explain the door pump drop 1 manual corpse state motor power "target=_blank> machine electromagnetic exchange inquiry Electromagnet brake 1 rapid drop ten hydraulic pump start ten explanation door lift ten explanation door pump drop ten ten gates, moving down (4) in the original unit upper chamber oil valve installed a 笮 like this bamboo only for pumping function, the original The double charge and return function is replaced by a new charge pipe connected to the charge tank.
5 Install a 4 digital gate control device on each gate to replace the 40582 mechanical control device. The control is more accurate and the opening of the gate can be monitored at any time on the operating panel.
4 Conclusion Through the transformation, the unstable factor of the hydraulic hoist of the water inlet of our unit was completely solved, and good results were achieved.
Take the research work on the maintenance of hydraulic machinery. Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
I Equipment Introduction Shuikou Power Plant installed 7 sets of 22315,800 rotary-turbine turbines, which recorded the speed of the Yixie joint, the runaway speed, and the Feiyi speed of the Yefei non-joint working condition. For the separate water diversion unit, the inlet quick gate and the road inspection gate are set up in the water inlet. The hydraulic hoist adopts single lifting point type, the model is, 14 tearing 20014 fast gate is used to quickly close the inlet gate when the unit falls fast gate accident protection action to prevent the unit from overspeed, and the unit is used for isolation when the unit is under minor repair. Water source. The access door is used to isolate the water source during quick brake maintenance. The seven units share two maintenance doors, and the unit's quick brakes have a fast drop. The pump lowers the door and the manual fast-falling function, in which the fast-falling time is static water 27, 8. anhydrous 260 moving water 24, 8 to meet the needs of adjustment guarantee. The operating conditions are static water. The moving water is closed. When the gate descends 2001, the main chest starts to lift the gate and drops 205, when the spare dish is put in and reported 2, the equipment was put into operation in July 1993. The overall condition of the equipment has been basically good so far, but there are also some defects. The operation control valve group of the 7 sets of hydraulic cylinders of the hydraulic hoist is an integrated unit structure 1 dotted frame. If the failure of the gate control valve group of the unit needs to be repaired, the control valves of the seven units are made into one piece. The pressure oil and return oil of the 7 machines are communicated inside the valve block and cannot be isolated separately. It is necessary to drop the quick gates of all unit inlets. The whole plant was forced to stop, affecting the normal operation of all the units in the whole plant. Since 2301 is common to 7 units. This will also occur when the fault requires an overhaul. The existence of this situation is a great hidden danger to the safe and economic operation of the whole plant and even the entire system.
When the unit is overhauled, the quick brake falls, but the filling valve cannot be automatically put in place. It is necessary to start the chestnut to pressurize the upper chamber of the hydraulic cylinder to completely close the filling valve. However, if the other machine just hits 200, the automatic door lift will accelerate the electromagnetic force on both sides of the machine, so the oil pump is in an overflow state. The No. 7 cylinder 1 cavity oil is controlled to return to the fuel tank through 40 through the damped cartridge valve block 1.60 for overflow. The 7 gate is in a state of rapid decline, which accelerates its sliding speed. This type of failure has occurred in previous runs. Therefore, in the subsequent pumping process, there must be someone to monitor the lower chamber oil pressure of other units. Once I found out which unit had a sudden drop in oil pressure in the lower chamber. Stop the pump immediately. To prevent the occurrence of the above phenomenon.
During the rapid gate rapid drop, the oil in the lower chamber of the cylinder is directly returned to the upper chamber through the opening of 501. Due to the presence of the lower chamber piston rod. It causes the oil return to form a differential circuit. The oil it is poor is replenished by the fuel tank. During the operation, we observed that this replenishment would form a vacuum if it was not timely. Especially in the 1 and 7 machines far from the control room. This phenomenon is obvious because the pipeline is too long.
In the next pumping process, it usually takes a few minutes to replenish it. The original hydraulic system electromagnet action 1.
3 improvement measures 1 redesign. One set of overflow pressure regulating block is manufactured, corresponding to each set of seven independent control valve blocks, and the one-way control of the ball valve is added accordingly, so as to control the valve block of each hydraulic cylinder separately for maintenance. Does not affect the normal operation of other units 2. Hydraulic system electromagnet action 2 On each hydraulic frame of the machine, set only two check valves with a volume larger than the volume of the piston rod, so that the oil replenishment is smoother and faster.
3 This transformation also carried out hole transformation on the electrical circuit. If a unit explains the pump control drop, it will happen that the other unit will drop 200, and it will automatically increase. The electric circuit will lock the pump control and lower the priority. And from the new hydraulic control loop analysis. Even if the electrical lockout fails, the gate will not be accelerated, and the road will be locked. In addition, when the accident of a certain unit falls quickly, the function of the pump drop door of other gates is quickly explained by the lockout priority. In order to avoid the oil circuit mutual interference with the water conservancy technology working condition motor change (eight) valve electromagnet to explain the door fast drop oil chestnut start to explain the door lift ++ explain the door pump drop 1 manual corpse state motor power "target=_blank> machine electromagnetic exchange inquiry Electromagnet brake 1 rapid drop ten hydraulic pump start ten explanation door lift ten explanation door pump drop ten ten gates, moving down (4) in the original unit upper chamber oil valve installed a 笮 like this bamboo only for pumping function, the original The double charge and return function is replaced by a new charge pipe connected to the charge tank.
5 Install a 4 digital gate control device on each gate to replace the 40582 mechanical control device. The control is more accurate and the opening of the gate can be monitored at any time on the operating panel.
4 Conclusion Through the transformation, the unstable factor of the hydraulic hoist of the water inlet of our unit was completely solved, and good results were achieved.
Take the research work on the maintenance of hydraulic machinery. Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
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