Factory direct sales of high-quality LWS-2X2 meter flat steel waste rack

Profiled steel flat dirt barrier_Product introduction Hebei Guangyu Water Conservancy Equipment China Ministry of Water Resources certified order phone number Manager Li is a frame placed in front of the water inlet to block aquatic plants, driftwood and other debris (generally called dirt) carried by the water flow. Grid structure. The height of the sewage rack at the deep water inlet is related to the reservoir water level and the sewage cleaning method. A frame-grid structure located in front of the water inlet to block aquatic plants, driftwood and other debris (generally called dirt) carried by the water flow. The pollution rack is composed of a frame, a transverse partition and a grid (see picture). It is supported on a concrete pier wall and is generally made of steel. The spacing between the bars depends on the size, amount and application requirements of the dirt. The spacing between the bars used in hydropower stations It depends on the model and size of the turbine to ensure that the dirt passing through the waste rack will not be stuck in the flow-passing parts of the turbine. Generally, drainage tunnels and drainage holes are not equipped with waste racks. If the diameter of the hole or aperture is not large, When there is a lot of sunken wood that needs to be installed, the spacing between the bars should be increased. The load on the trash rack, in addition to its own weight, is mainly the water load caused by the water level difference between the front and rear of the rack after the dirt is blocked. Generally, it is considered based on the water head. .The size of the grate surface of the trash rack is determined by the flow rate and the allowed flow rate. In order to reduce the head loss and facilitate cleaning, it is generally required that the flow rate over the rack is not greater than about ./. The trash rack can be made fixed or can be hoisted. . The waste rack can be arranged in a straight line or a semicircular polygonal shape on the plane, and can be upright or inclined on the elevation. It depends on the nature and amount of the dirt carried by the water flow, the application requirements and the cleaning method. . The water inlets of post-dam hydropower stations with high water heads usually use upright semi-circular water inlets, hydraulic tunnels, and water pipelines. The height of the waste retaining rack of the deep water inlet is related to the reservoir water level and the cleaning method. For If frequent cleaning is not required, the top elevation can be slightly higher than the flood control limit water level (see reservoir characteristic value). If frequent cleaning is required, the top elevation should be higher than the high water level that requires cleaning. Larger height sewage racks can be made It is divided into several sections, and the size of each section can be determined according to the lifting capacity. In winter in cold areas, antifreeze measures need to be taken for the waste rack. Commonly used methods are: ① Pass low-voltage current to the waste rack and use the resistance of the metal structure itself Generate heat to prevent freezing. This method is simple, but consumes a lot of power. ② Under the water surface in front of the barrier, use compressed air to bring the higher-temperature water in the lower layer of the reservoir to the surface to keep the area in front and behind the waste barrier free of ice. This method is commonly used In large reservoirs. The dirt can be cleaned manually or with a cleaning machine. The suitable depth for manual cleaning is shallow and generally does not exceed the depth. When the dirt barrier is located deep underwater, a multi-purpose cleaning machine can be used to clean the dirt. If necessary, two channels can be set up When the dirt collecting rack needs to be cleaned, first put the spare trash collecting rack into the access door slot, and then lift out the working trash collecting rack for cleaning.