5 results about "Diaphragm rupture" patented technology

The invention provides a diaphragm breakage detection device and a reciprocating pump device, which do not cause malfunction even if gas components contained in bubbles generated in a pump chamber penetrate through a diaphragm. This diaphragm breakage detection device (3) detects breakage of a diaphragm (25) of a reciprocating pump (2). A diaphragm breakage detection device is provided with: a fluid path (FP) that can communicate with a through-hole (24a) of a peripheral ring (24); a pressure detector (8) that detects the pressure in the fluid path; an exhaust valve (GV) connected to the fluid path; and a discharge path (65) connected to the exhaust valve. An exhaust valve is provided with: a valve body (9); a valve chamber (Rv) that accommodates the valve body; and a valve seat surface (42b) disposed above the valve body. The discharge path opens in the valve seat surface. The valve body can move between a valve closing position (P2) and a valve opening position (P1), and is located at the valve opening position when the diaphragm is not damaged. When the valve body is not in the closed valve position, the valve chamber communicates with the fluid path and the discharge path.

This utility model discloses a diaphragm rupture alarm device for a diaphragm metering pump, relating to the field of diaphragm rupture alarm technology. The device includes a pressure gauge connected to the first end of a tee via a first double-threaded nut. The second end of the tee is connected to a venting and draining assembly. The third end of the tee is connected to a valve guide sleeve via a second double-threaded nut. The valve guide sleeve has a valve ball guide hole that communicates with the interior of the tee. The valve guide sleeve is connected to an air / liquid inlet assembly, which is connected to the diaphragm metering pump. This invention solves the problem that existing pressure gauge-type alarm devices are inconvenient for implementing venting and draining functions.

This invention discloses an alarm device and method for preventing diaphragm rupture in a diaphragm metering pump. The outlet of the emergency replenishment tank is connected to the first opening of the quick-connect tee for the metering pump inlet, and the second opening of the quick-connect tee for the metering pump inlet is connected to the inlet of the metering pump. The top of the emergency replenishment tank is equipped with an injection stop valve and an air inlet check valve. The outlet of the metering pump is connected to the first opening of the quick-connect tee for the metering pump outlet, and the second opening of the quick-connect tee for the metering pump outlet is connected to the dosing point. The third opening of the quick-connect tee for the metering pump outlet is connected to the inlet of a pressure relief buffer tank via a pressure relief check valve. The outlet at the bottom of the pressure relief buffer tank is connected to a floor drain via an emptying check valve. An overpressure conductivity meter is connected to the bottom of the pressure relief buffer tank, and a loss conductivity meter is connected to the upper side of the emergency replenishment tank. This device and method can prevent diaphragm rupture accidents in diaphragm metering pumps and has high safety.

The utility model discloses a fingertip blood detection device containing an SFTSV antigen rapid detection colloidal gold test strip, and aims to simplify the operation process and improve the detection efficiency and reliability. The device comprises a deformable first cavity and a deformable second cavity which are respectively provided with a blood collection channel, a first accommodating space and a second accommodating space for packaging lysate; the first cavity and the mixed flow guide channel are communicated through a mixed flow guide channel, the first cavity and the mixed flow guide channel are blocked by a first diaphragm and a second diaphragm respectively, and the rupture strength of the first diaphragm is higher than that of the second diaphragm. During use, the first cavity is pressed, so that the diaphragms are sequentially broken, the lysis solution is sucked into the first accommodating space, then fingertip blood is sucked into the first accommodating space through the collection channel to be mixed, and finally the mixed solution is dropped into the detection test strip; the device adopts a linearly arranged cavity and a channel, so that sufficient mixing is ensured. The device integrates the functions of collecting, mixing and transferring, is suitable for rapid detection of grassroots units, and remarkably reduces the operation time and pollution risks.

The invention provides a shock tunnel diaphragm rupture time prediction method, and the method comprises the steps: regarding a diaphragm rupture process as a large deformation transient process under a high strain rate, building a kinetic equation about a diaphragm flap rotating shaft, and carrying out the normalization processing of a time item; the diaphragm opening position is innovatively regarded as a nozzle throat, an unsteady one-dimensional expansion pneumatic relation is utilized, pneumatic parameters are converted into pressure boundary conditions in diaphragm structure analysis, and then diaphragm rupture time is inversely solved through integration. The method effectively solves the problem that the rupture time of the diaphragm and the opening time under different opening degrees are difficult to accurately predict, the theoretical prediction error is within 10%, the method has the advantages of being rapid in calculation, high in precision and wide in applicability, and the research and development cost of the shock tunnel test can be greatly reduced.