Double-diaphragm rupture warning device of metering pump

Abstract

The invention discloses a double-diaphragm rupture warning device of a metering pump. The double-diaphragm rupture warning device comprises a double-diaphragm sealing ring. The double-diaphragm sealing ring is fixed to a position between a pump head and a pump cylinder of the metering pump by the aid of bolts, mounting fixing positions for a pump-head-side diaphragm and a pump-cylinder-side diaphragm of the metering pump are arranged on the double-diaphragm sealing ring, the top of the double-diaphragm sealing ring is used as a pressure output channel and is connected with an adjustable pressure filter valve, an annular pressure sampling pipe clings to the inner side of the double-diaphragm sealing ring, crossed pressure sampling holes are uniformly formed in a pipe body of the annular pressure sampling pipe, the top of the annular pressure sampling pipe is connected onto the pressure output channel of the double-diaphragm sealing ring, the annular pressure sampling pipe is connected with the adjustable pressure filter valve, and various warning monitoring elements are connected to the top of the adjustable pressure filter valve. The double-diaphragm rupture warning device has the advantages that the problem that media or hydraulic oil are contaminated by fillers of an existing double-diaphragm rupture warning device with the fillers after diaphragms rupture can be solved; problems that mistaken warning signals are easily transmitted by an existing vacuumized double-diaphragm rupture warning device and staffs are misled by the mistaken warning signals can be solved.

Description

technical field [0001] The invention relates to the technical field of metering pumps, in particular to a metering pump double-diaphragm rupture alarm device. Background technique [0002] The first method of the double-diaphragm rupture alarm device used in conventional metering pumps is to fill the diaphragm with special substances. If the diaphragm is ruptured, it can be judged whether the diaphragm is ruptured by detecting the contamination of the substance. The advantage of this method is that it can be real-time and accurate. The disadvantage is that the filling between the double diaphragms will pollute the flow medium or hydraulic oil when the diaphragm is broken, and it is not easy to control the amount of filling material during repair, which requires professional handling. The second method is to draw a vacuum for the cavity between the two diaphragms and the sealing ring, and judge whether the diaphragm is broken by detecting the vacuum degree in the sealed cavit...

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Problems solved by technology

[0003] In order to solve the above problems in the prior art, the object of the present invention is to provide a metering pump double-diaphragm rupture alarm device, which solves the problem of the existing double-diaphragm rupture alarm device with fillers. When the diaphragm ruptures, the filler pollutes the medium or The problem of hydraulic oil, and at the same time solve the problem that the double diaphragm rupture alarm device for vacuuming is easy to send out wrong alarm signals and mislead the staff

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