Multi-functional oil supplementary valve for diaphragm pump

Abstract

The invention discloses a multi-functional oil supplementary valve for a diaphragm pump. The multi-functional oil supplementary valve comprises a valve body, a valve seat and an oil inlet joint. The valve body is provided with a valve seat step hole, the valve seat is installed in the valve seat step hole, the valve seat is provided with three passages communicating with each other through an internal chamber, the upper end of an ejecting rod extends into the oil inlet passage and forms an oil passage gap, the oil passage gap is always in communication with the oil outlet passage, and the lower end of the ejecting rod penetrates out of the valve seat. A rotatable lever is mounted on the valve body, one end of the lever is used for being in contact with a diaphragm guide rod, and the otherend of the lever abuts against the lower end of the ejecting rod; and an oil chamber formed by a small hole of the valve seat step hole communicates with the oil inlet joint through an oil hole. A first spring and a first valve ball are arranged in the oil chamber, and the first valve ball is used for closing an opening part of the oil inlet passage of the valve seat; and the upper end of the ejecting rod abuts against the first valve ball. The oil supplementary valve can automatically supplement a hydraulic oil chamber of the diaphragm pump for oil, manual intervention can be carried out foroften oil replenishment, the short-term special working condition needs are met, and the pressure-reducing oil amount can be adjusted online.

Description

technical field [0001] The invention relates to a diaphragm pump, in particular to a multifunctional oil replenishing valve for a diaphragm pump. Background technique [0002] Diaphragm pump is an important type of pump. It is a positive displacement pump that causes volume change on the conveying medium side due to the reciprocating deformation of the diaphragm, so as to realize the suction and discharge of the conveyed medium. In industrial production, diaphragm pumps are mainly used to transport corrosive liquids or contain solids suspended matter of liquid. The deformation (deflection or position) of the diaphragm must be effectively controlled, otherwise it may cause excessive stretching of the diaphragm and cause damage, affecting the normal use of the product. The deformation of the diaphragm is mainly controlled by the oil replenishment and discharge mechanism. When the diaphragm moves toward the hydraulic oil side to the set position, the diaphragm guide rod trig...

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Problems solved by technology

[0003] figure 1 It is a common mechanical automatic replenishment valve for diaphragm pumps at present. Since the clearance of the slide valve has to be used as a seal, the clearance is usually only 0.03-0.05mm. If the hydraulic oil contains a small amount of slurry, it is easy to cause the slide valve to jam and cause Supplementary oil fails, so the supplementary valve has high requirements on the quality of hydraulic oil

In addition, if the leakage of the piston seal etc. is large, the valve only replenishes oil during a small part of the suction stroke, and there may be insufficient oil replenishment. When the pump is not allowed to stop at this time, the oil replenishment valve cannot meet the requirements. Condition

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