Diaphragm type mud valve

Abstract

The invention relates to the technical field of mud valves, in particular to a diaphragm type mud valve which comprises a valve body, a valve rod, a valve clack and a sealing ring and further comprises a quick release cylinder. A sealing slope is arranged on the edge of the inner side of one end of the quick release cylinder, and an extending part capable of being matched with the outer contour of the sealing slope is arranged at the bottom of the sealing ring. A sealing stepped groove is formed in the outer edge of the end of the quick release cylinder, a bearing protrusion used for bearing the sealing ring is arranged between the sealing stepped groove and the sealing slope, a stepped layer extending outwards is arranged on the outer side of the sealing ring and can be located in the sealing stepped groove, and a sealing notch is formed in the top of the stepped layer. A pressing protrusion is arranged on the edge of the upper portion of the inner wall of the output end of the valve body, the quick release cylinder can be detachably pressed in the output end, the bottom of the edge of the pressing protrusion can be attached to the top face of the bearing protrusion, and an extrusion annular plate which can correspond to the sealing notch and can be extruded in is further arranged at the bottom of the pressing protrusion. According to the diaphragm type mud valve, the sealing ring of the valve body can be conveniently and rapidly replaced in the later period, and maintenance is facilitated.

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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