Reversible overflow gate device for large grit chamber

Abstract

The invention provides a reversible overflow gate device for a large grit chamber. The height of the top of an overflow gate can be adjusted randomly, and when materials are fed, the height of the overflow gate is adjusted to the maximum value, the just-fed materials which are not clarified can be prevented from directly crossing the upper end of the overflow gate and then entering the discharging port end, after the sand-containing materials are clarified for a period of time, the height of the top of the overflow gate is reduced, and the clear supernatant water is allowed to flow cross the top of the gate and flow into the discharging port end and then is pumped out by a submersible sewage pump 12, the height of the top of the overflow gate is reduced at regular intervals, a step-by-step sedimentation overflow method is adopted, so that the water content of the silt 13 at the feeding port end of the grit chamber is less and less, and finally a grabbing machine is used for grabbing sand out of the device. The reversible overflow gate device is composed of an electric transmission assembly 1, a transmission assembly supporting seat 2, the overflow gate 3, an overflow gate hinge seat 4, an overflow gate bottom circular shaft 5, a bottom circular shaft supporting seat 6, a manual transmission assembly 7, a side swing assembly 8, a connecting rod 9, a pin shaft 10 and the like.

Description

technical field [0001] The utility model patent relates to the field of environmental protection facilities, and proposes a reversible overflow gate device for large grit chambers. Background technique [0002] Sewage treatment and manure treatment in many farms usually use grit chambers to remove sand. The methods currently used for sand removal in grit chambers are: sand pumping, sand scraping machine, spiral sand removal machine or other removal methods. For sand removal by the sand machine, the sand-containing material pumped by the sand discharge pump should not be too dry, and it needs to be diluted with water. In addition, a sand-water separator is required to separate the sand and water, and the sand discharge pump is easy to break. The sand scraping machine needs to be used in conjunction with the spiral desander. The interior of the grit chamber is not suitable for installing other equipment. The installation angle of the spiral desander is strictly limited. It occ...

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Problems solved by technology

[0002] Sewage treatment and manure treatment in many farms usually use grit chambers to remove sand. The methods currently used for sand removal in grit chambers are: sand pumping, sand scraping machine, spiral sand removal machine or other removal methods. For sand removal by the sand machine, the sand-containing material pumped by the sand discharge pump should not be too dry, and it needs to be diluted with water at every turn. In addition, a sand-water separator is required to separate the sand and water, and the sand discharge pump is easy to break

The sand scraping machine needs to be used in conjunction with the spiral desander. The interior of the grit chamber is not suitable for installing other equipment. The installation angle of the spiral desander is strictly limited. It occupies a large space and cannot remove sand with small particles and a specific gravity similar to that of water. , and the sand-water separator that relies on high-speed rotation to generate centrifugal force cannot remove sand with small particles and a specific gravity similar to that of water, and the filter screen is easily blocked

[0003] In the past, the sedimentation method was used to remove sand from the grit chamber. A concrete partition or steel partition with a fixed height was added between the inlet end and the outlet end of the grit chamber. The top height of the partition was 200-500mm lower than the height of the grit chamber top. , the clarified upper layer of clear water at the inlet end of the grit chamber continuously crosses the top of the partition and flows into the outlet end, and then is pumped out by the lift pump. However, this fixed-height partition makes the water content of the material at the inlet end of the grit chamber too large. Unable to separate sand from water and remove sand

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