9 results about "Diaphragm rupture" patented technology

The application relates to the technical field of diaphragm testing, in particular to a diaphragm valve diaphragm service life testing device which comprises a box body and further comprises a first pipeline, a second pipeline, a water pump, an intermediate pipeline, a first testing part and a control part, wherein: one end of the second pipeline is in communication with the upper end of the first pipeline, and the other end of the second pipeline is in communication with the intermediate pipeline; the water pump is connected in series on the second pipeline; the first testing part comprises a testing pipeline, one end of the testing pipeline is in communication with the intermediate pipeline, the other end of the testing pipeline is located in the interior of the box body, the testing pipeline is provided with an opening, a clamping piece is arranged on the periphery of the opening, the clamping piece is used for mounting a diaphragm, a circular ring is arranged on the periphery of the clamping piece, a water-sensitive sensor is arranged in the circular ring, a driving part is arranged above the testing pipeline, the driving part is drivingly connected with a tension sensor, and a connecting rod is arranged at the bottom of the tension sensor. The diaphragm deformation life and the diaphragm rupture life can be simultaneously detected, and the comprehensiveness of diaphragm detection is improved.

A diaphragm and a preparation method thereof belong to the technical field of diaphragms. The preparation method of the diaphragm comprises the following steps: obtaining a casting sheet containing polyethylene and a pore-forming agent; and sequentially stretching and extracting the cast sheet for multiple times to obtain the diaphragm. Wherein the multiple stretching comprises transverse stretching, longitudinal stretching and two-way synchronous stretching. Or the multiple times of stretching comprise multiple times of transverse stretching and multiple times of longitudinal stretching, and transverse stretching and longitudinal stretching are alternately carried out. The multiplying power ratio of any two times of stretching is 1: (0.8-1.2), the preheating temperature of transverse stretching is 105-125 DEG C, the stretching temperature is 95-120 DEG C, and the stretching temperature is not higher than the preheating temperature. According to the method for preparing the diaphragm, high-magnification stretching can be realized, the probability of slipping and diaphragm rupture in the stretching process can be reduced, and the specific needling strength of the diaphragm can be improved.

The invention discloses a partition leakage detection structure of a diaphragm compressor, and relates to the technical field of diaphragm compressors. The sealing effect between the diaphragm and the cylinder cover is enhanced, leakage of the gas side diaphragm, leakage of the oil side diaphragm and leakage of diaphragm breakage can be detected respectively, and false alarm of diaphragm breakage is avoided. The leakage detection structure comprises an embedded membrane head structure and a leakage detection structure. The embedded membrane head structure comprises a gas side membrane head, an oil side membrane head, an oil distribution disc and a membrane; the leakage detection structure comprises a gas leakage detection device, a hydraulic oil leakage detection device and a diaphragm rupture detection device; a gas leakage detection channel is formed in the gas side film head; a first hydraulic oil leakage detection channel is formed in the oil distribution disc; a second hydraulic oil leakage detection channel is formed in the oil side film head; a hydraulic oil leakage detection device is arranged at an outlet of the second hydraulic oil leakage detection channel; a diaphragm rupture detection opening is formed in the oil side diaphragm head; and a diaphragm rupture detection device is arranged at the diaphragm rupture detection port.

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 discloses a diaphragm rupture pressure stability prediction method, which comprises the following steps of: measuring the microstructure of the bottom of a nick, performing statistical analysis, and establishing a finite element model considering roughness based on data obtained by the statistical analysis; constructing a diaphragm rupture finite element simulation model based on a Johnson-Cook constitutive model and a shear damage criterion, and verifying the accuracy of the model through experiments; establishing a fracture pressure stability agent model under the multi-scale characteristic; key influence factors are identified through sensitivity analysis, a processing tolerance band meeting a rupture pressure design target is reversely derived according to a '3 sigma' control principle, and whether the rupture pressure meets the specified design requirement of rupture pressure stability or not is judged according to actual morphology parameters of the nicks of the film. The invention relates to the technical field of spacecraft diaphragm machining, and can solve the problem that in the prior art, the microstructure of the bottom of a diaphragm nick affects the diaphragm rupture pressure response stability.

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.