16 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.

The invention relates to an explosion experiment device, in particular to a shock tube based on a different-material double-diaphragm membrane breaking structure and a design method and an experiment method thereof, and aims to solve the problem that the performance of generated shock waves is affected by a valve structure, a pressure membrane breaking structure and a cutting membrane breaking structure of an existing shock tube. The shock tube is formed by matching the metal diaphragm and the plastic diaphragm, and the diaphragm breaking pressure can be accurately controlled. The design method comprises the steps that firstly, an experiment is conducted to obtain the relation between the plastic diaphragm rupture pressure and the plastic diaphragm thickness and the relation between the metal diaphragm rupture pressure and the metal diaphragm thickness, then the thickness of the plastic diaphragm and the notch depth of the metal diaphragm are determined, and then the length and the inner diameter of a pressure difference control section cylinder and the installation position of the diaphragm are determined; and finally, estimating the gas flow coefficient Kv of the exhaust pipe, and comprehensively designing parameters of the exhaust pipe and the electromagnetic valve. The shock wave performance and parameter precision generated by the experiment method are high.

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.

In order to provide a diaphragm rupture signalling device for a diaphragm pump, which ensures a more functionally reliable rupture signalling compared to the prior art, a diaphragm to be arranged between the drive unit and the delivery unit is disclosed, with at least a first and a second essentially circular diaphragm layer, wherein the diaphragm has a clamping area and an operating area and a sensor area arranged in the section of the clamping area in which at least one of the diaphragm layers is designed such that, when the pressure between this diaphragm layer and the adjacent diaphragm layer increases, it moves further away from the adjacent diaphragm layer in the section of the sensor area than in the other sections of the diaphragm, with an increase in the distance between the diaphragm layers, thereby triggering a diaphragm rupture signalling signal in the diaphragm pump.

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.

Method for detecting a diaphragm rupture of a pressure transducer, comprising the following steps: a) recording, in particular temporally successive, pressure measurement values ​​by means of the pressure sensor (100); b) Extracting positive and negative pressure peaks from the recorded pressure measurements; c) Classification of pressure peaks into negative and positive pressure peaks (Ppos, Pneg); d) Determining a pressure difference ratio between the positive and negative pressure peaks; e) Decide / determine whether a diaphragm rupture has occurred based on the determined pressure difference ratio (Pver) between the positive and negative pressure peaks (Ppos, Pneg).

The present invention discloses a pressure reducing valve with a pressure chamber, which can change the output pressure of the pressure reducing valve by pressurizing or releasing the pressure chamber pressure from the outside; it includes a regulating assembly with a pressure chamber, a diaphragm and a valve core assembly, and also includes a piston assembly, the piston assembly is sealed and arranged in the regulating assembly, one end cooperates with the pressure regulating spring in the regulating assembly, and the other end cooperates with the diaphragm. This scheme retains the advantages of the diaphragm pressure reducer, and also has a safety protection function under diaphragm rupture. When the diaphragm fails and ruptures, even if it is affected by the spring force, the valve core will not be fully opened, and gas can still be transported normally; furthermore, the diaphragm is only affected by the inner pressure, not the outer pressure, and the inner pressure is protected by the piston assembly limit. When a failure occurs, the probability of diaphragm rupture is relatively low, which effectively overcomes the problems existing in the prior art.

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 relates to a diaphragm rupture signaling device. In order to provide a diaphragm rupture signaling device for a diaphragm pump which ensures functionally more reliable rupture signaling compared to the prior art, a diaphragm arranged between a drive unit and a delivery unit is disclosed, having at least a first and a second substantially circular diaphragm layer, the diaphragm having a clamping region and a working region and a sensor region, at least one of the diaphragm layers is designed such that the distance between the diaphragm layers increases when the pressure between the diaphragm layer and an adjacent diaphragm layer increases, the diaphragm layer moving further away from the adjacent diaphragm layer in the section of the sensor region than in other sections of the diaphragm, and the diaphragm layer moving further away from the adjacent diaphragm layer when the pressure between the diaphragm layer and the adjacent diaphragm layer increases. A diaphragm rupture signaling signal in the diaphragm pump is thereby triggered.

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.

In order to provide a diaphragm rupture detection device for a diaphragm pump which ensures a more reliable rupture detection than the prior art, the invention proposes a diaphragm to be arranged between the drive unit and the delivery unit, with at least a first and a second substantially circular diaphragm layer, wherein the diaphragm has a clamping region and a working region and a sensor region arranged in the section of the clamping region, in which at least one of the diaphragm layers is designed such that when the pressure between this diaphragm layer and the diaphragm layer adjoining it increases, the sensor region moves further away from the diaphragm layer adjoining it in the section of the sensor region, thereby increasing the distance between the diaphragm layers than in the other sections of the diaphragm, whereby a diaphragm rupture detection signal is triggered in the diaphragm pump.

The utility model relates to a diaphragm rupture alarm device for a high-pressure diaphragm reciprocating pump, which belongs to the field of diaphragm reciprocating pumps and comprises a valve body, a monitoring mechanism for monitoring and alarming diaphragm rupture is arranged on the right side of the valve body, and an oil drainage mechanism for draining redundant high-pressure oil is arranged on the inner bottom wall of the monitoring mechanism. According to the diaphragm fracture alarm device for the high-pressure diaphragm reciprocating pump, the monitoring mechanism is arranged, and the monitoring mechanism monitors the state of a diaphragm in real time through an inductive sensor, detects diaphragm fracture and can rapidly send out an alarm signal; the integrity of the diaphragm can be detected under the condition that the diaphragm is not in direct contact with a medium, pump body damage caused by diaphragm breakage can be avoided by monitoring the state of the diaphragm and replacing the diaphragm in time, so that the service life of the pump is prolonged, the broken diaphragm is allowed to be quickly recognized and replaced through the design of the monitoring mechanism, and the maintenance time and cost are reduced.