A diaphragm type mud discharge valve

Abstract

The invention relates to the technical field of mud discharge valves, in particular to a diaphragm type mud discharge valve, which includes a valve body, a valve stem, a valve disc, and a sealing ring, and also includes a quick-release cylinder. The bottom of the sealing ring is provided with an extension that can match the outer contour of the sealing slope, and the outer edge of the end of the quick release cylinder is provided with a sealing step groove, and there is a bearing between the sealing step groove and the sealing slope to support the sealing ring. The outer side of the sealing ring has a stepped layer extending outward, the stepped layer can be placed in the sealing stepped groove, the top of the stepped layer has a sealing notch, the upper edge of the inner wall of the output end of the valve body has a pressing protrusion, and the quick release cylinder can The disassembled one is press-fitted in the output end, the bottom edge of the pressing protrusion can fit the top surface of the supporting protrusion, and the bottom of the pressing protrusion also has an extrusion annular plate that can correspond to the sealing notch and can be squeezed in. The invention facilitates the quick replacement of the sealing ring of the valve body in the later stage and is beneficial to maintenance.

Description

technical field [0001] The invention relates to the technical field of mud discharge valves, in particular to a diaphragm type mud discharge valve. Background technique [0002] The sludge discharge valve, also known as the cover valve, is often used to discharge sludge from the bottom of the sedimentation tank of urban water plants and sewage treatment plants. The applicable medium of the sludge discharge valve is raw sewage, the temperature of the medium should generally be less than 50°C, and the working water depth should be less than 10 meters. The sludge discharge valve is also used in water treatment plants to discharge sludge and waste water in the pool. Due to the influence of the use environment, the output port of the existing sludge discharge valve will be corroded for a long time, and some parts are easily damaged. [0003] After searching according to the above problems, Chinese Patent No.: CN201610431468.5 is a diaphragm type quick-opening mud discharge valve...

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Problems solved by technology

[0004] Although the above technical solution has good operability and low installation cost, the sealing structure of the output port of the valve body is composed of a rubber layer and a sealing ring outside the valve disc. These two sealing elements are bound together with the valve disc. As mentioned above, the sludge discharge valve has been working in the environment of sludge and wastewater for a long time, the environment is harsh, and the internal components may often be corroded and damaged, so the maintenance interval of the sludge discharge valve is relatively short and the frequency is high, so the sludge discharge valve in the above technical installation If you want to replace the sealing element, you must dismantle the valve body and take out the valve stem and disc. The installation of the valve body itself is more complicated, and frequent disassembly can easily cause changes in the subsequent installation accuracy, which is not friendly to the overall structure of the valve body, and also increases It is difficult to maintain and requires certain operating ability for the operator

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