28 results about "Bubble point" patented technology

The application belongs to the technical field of detection, and discloses a sintering screen integrity detection method and system; the method comprises the following steps: installing a measured sintering screen into a test tank body, and injecting a test liquid into a liquid cavity; gradually increasing the air pressure of an air cavity; after increasing the air pressure once, maintaining the pressure for a preset time, and then collecting an overall image of the liquid cavity; a host computer obtains the positions of multiple bubble points according to the overall image, determines the air pressure when each bubble point starts to bubble, and controls an image module to collect local microscopic images of each bubble point; the host computer calculates the first aperture of each bubble point according to the air pressure when each bubble point starts to bubble, obtains the second aperture of each bubble point according to the local microscopic images of each bubble point, and calculates the effective aperture of each bubble point according to the first aperture and the second aperture; the host computer judges whether the aperture of the measured sintering screen is qualified according to the effective aperture of each bubble point; thereby, the degree of automation is high, the detection efficiency is high, and the accuracy of the detection result is improved.

The invention discloses a method for purifying dimethyl oxalate, which comprises the following steps: 1) introducing crude dimethyl oxalate into a pre-separation tower to remove light components in the crude dimethyl oxalate; 2) introducing the tower kettle material obtained in the step 1) into a purification-vaporization tower at a temperature close to a bubble point; the purification-vaporization tower comprises a tower body, the tower body is filled with a tower plate or filler, a tower kettle of the tower body is provided with a reboiler (2), and a feeding end of the purification-vaporization tower is positioned in the middle of the tower body; 3) adjusting the vaporization rate of the material in the tower to 90-98%, and obtaining a high-purity gas-phase DMO product from the tower top of the purification-vaporization tower; and discharging the kettle liquid rich in heavy components from the bottom of the tower. According to the invention, purification and vaporization functions are integrated in the purification-vaporization tower, the system is simple, control variables are few, long-period stable operation is easy to realize, and the instability of operation of a traditional rectification tower under an extremely small reflux ratio is avoided.

The invention discloses a combined device and method for measuring the surface resistance and bubble point of an alkaline hydrogen production diaphragm. Comprising an end plate assembly with a transparent observation window, a first electrolyte containing cavity and a second electrolyte containing cavity which are located on the two sides of a diaphragm respectively, a diaphragm fixing plate used for clamping the diaphragm and limiting the effective testing area, an electrode plate with a hole in the center, a multi-layer sealing gasket and a fastening assembly, and is provided with a liquid injection / drainage interface, a liquid drainage interface and an air inlet interface. According to the testing method of the device, under the condition that the clamping and pressing states of the diaphragm are not changed, the surface resistance of the diaphragm can be measured in a set atmosphere / bubble-containing electrolyte environment, and then bubble point pressure testing is achieved by emptying the containing cavity on one side and maintaining wetting liquid covering on the other side. And the transparent observation window is used for observing the infiltration state of the diaphragm and the bubble generation and attachment behaviors in real time, so that the accuracy of judging the area resistance and the bubble point is improved, and a consistent microscopic state basis is provided for establishing the association between the bubble point and the area resistance.

The utility model relates to the technical field of filter membrane fixing devices, in particular to a filter membrane fixing device for a bubbling point tester, which improves the installation firmness of a fixing ring, improves the positioning stability of a filter membrane and improves the convenience of assembly and disassembly operation. Comprising a tank body and a supporting ring, an opening is formed in the top end of the tank body, and the supporting ring is installed on the inner side wall of the tank body; the fixing ring is arranged in the tank body, the bottom end of the fixing ring is in contact with the top end of the supporting ring, the supporting net is installed on the inner side wall of the fixing ring, the filter membrane is embedded in the fixing ring, the bottom end of the filter membrane is in contact with the top end of the supporting net, and the positioning device is arranged at an opening in the top end of the tank body; the positioning device is used for sealing the opening of the tank body and pressing and limiting the filter membrane.

Described herein are systems and methods for liquid phase separation for fuel tanks and other vessels. Particularly, aspects of the present disclosure are directed to a backpressure regulator configured to open when pressure of a mixture upstream of the backpressure regulator exceeds a predetermined setpoint and a hydrophobic membrane upstream of the backpressure regulator and downstream of a first conduit. The predetermined setpoint may be determined by at least a bubble point pressure of the hydrophobic membrane. Additionally, the backpressure regulator may be fluidically connected to and downstream of the first conduit, and to at least one pump operably connected to and upstream of the first conduit and the hydrophobic membrane may be fluidically connected to and upstream of a second conduit. The backpressure regulator may be fluidically connected to and upstream of a third conduit and the third conduit may be downstream the first conduit.

The application discloses a kind of R407C refrigerant leakage detection methods for vehicle air conditioning unit, directly utilize the characteristics of fast response of pressure signal, little influence of refrigerant because of the composition change caused by refrigeration system leakage, by comparing the pressure difference between the two refrigeration systems of double refrigeration system passenger room air conditioning unit and the absolute value of the pressure of single system, combined with outdoor environment temperature partition, three layers of logic, logic 1, logic 2 and logic 3 are designed, which correspond to different leakage severity and operation mode respectively.All logic uses "three times alarm confirmation" mechanism to avoid false alarm caused by transient disturbance.The R407C refrigerant leakage detection method for vehicle air conditioning unit of the application adopts a new type of refrigerant leakage detection logic based on pressure detection, completely avoids the influence of boiling point drift between bubble point and dew point of R407C refrigerant, the nature of leakage detection does not change, and the speed of refrigerant leakage detection feedback is also faster, more accurate and more accurate.

The invention discloses a method and equipment for predicting bubble point pressure of a solvent deasphalting system, and relates to the field of chemical separation simulation computation.The method comprises the steps that on the basis of a binary interaction parameter initial value of a target substance, the separation process of a substance to be separated is simulated, and a first liquid phase fugacity and a second liquid phase fugacity are calculated; determining a regression binary interaction parameter according to the first liquid phase fugacity and the second liquid phase fugacity; fitting binary interaction estimation model parameters according to the regressed binary interaction parameters; constructing a binary interaction estimation model suitable for the SRK or PR state equation according to the fitted binary interaction estimation model parameters; according to an SRK or PR state equation and the binary interaction estimation model, phase equilibrium calculation is conducted, the bubble point pressure of the solvent deasphalting system is predicted, the bubble point pressure can be accurately predicted, and more reliable thermodynamic support is provided for process design.

A method for oil recovery includes inputting into a computer system depletion data and rock and fluid properties of a reservoir. The method also includes computing, with the computer system, a difference between a producing current gas-oil ratio and a solution gas-oil ratio to provide a free gas oil ratio. In addition, the method includes referring, with the computer system, to a gas-oil relative permeability curve of the reservoir. Further, the method includes matching, with the computer system, the free gas oil ratio to a gas saturation on the gas-oil relative permeability curve to provide a free gas saturation. Still further, the method includes calculating, with the computer system, a current oil saturation of the hydrocarbon reservoir. Moreover, the method includes determining, with the computer system, that a current reservoir pressure is less than a bubble point pressure. The method also includes calculating, with the computer system, a time to repressure the hydrocarbon reservoir by waterflooding. In addition, the method includes calculating, with the computer system, a number of wells for waterflooding. Further, the method includes comparing, with the computer system, the data related to properties of the hydrocarbon reservoir to oil recovery screening criteria. Still further, the method includes selecting a flooding technique from a plurality of flooding techniques, with the computer system, based on satisfying the oil recovery screening criteria with the data related to properties of the hydrocarbon reservoir. Moreover, the method includes flooding the reservoir with the flooding technique.

The application provides a shale fluid phase change feature evaluation method and device, electronic equipment and a storage medium. A corresponding multi-scale pore model is established by obtaining pore size distribution parameters in a shale pore system, the composition of the fluid in each pore is obtained, and the initial dew point temperature and / or bubble point temperature can be determined by the initial physical property parameters corresponding to each composition. The balance physical property parameters in the corresponding pore balance state are determined, and the effective pore size of each pore is determined. The actual dew point temperature and / or bubble point temperature is obtained, and the phase change feature of the shale pore system is determined. The actual dew point temperature and / or actual bubble point temperature distribution of the system can be accurately obtained, the influence of the pore size distribution on the phase change feature is analyzed, and the accuracy of the specific pore phase change feature evaluation in the shale fluid system is improved.

The utility model discloses a bubble point detection mechanism for a filter element, which belongs to the technical field of filter element detection equipment and comprises a filter element, an air source pipe and a fixing plate positioned on one side of the filter element, an electric push rod is fixedly mounted on one side of the fixing plate, and the output end of the electric push rod is fixedly connected with a lower clamping plate. An upper clamping plate is fixedly connected to the upper end of the other side of the fixing plate, a bubble point detecting and adjusting assembly is fixedly installed at the end of the upper clamping plate, a supporting disc used for supporting a filter element is fixedly installed at the end of the lower clamping plate, and a U-shaped groove is formed in the lower end of the fixing plate. According to the insulation device, filter elements with different lengths can be conveniently detected through the bubble point detection adjusting assembly, the driving mechanism drives the filter elements to rotate by a certain angle, the longitudinal parts, with bubble points, of the filter elements are gradually detected in the circumferential direction, and therefore the polished detection parts are more accurate, the detection efficiency is higher, and the detection precision is higher. And the problem of difficult observation caused by mutual shielding of bubbles generated around the filter element at the same time is avoided.

The utility model belongs to the technical field of aviation test devices, and discloses a movable filter element bubble point test device. By means of the traditional mechanical design, 360-degree rotation of the filter element is achieved, meanwhile, multi-model filter element tests of an airplane are achieved through the replaceable airtight connector, and the device is a movable filter element bubble point test device, improves work efficiency and reduces work difficulty. The oil filter cleaning device is simple and practical in structure, has very high practicability, rapidness, accuracy and safety, is mainly applied to oil filter cleaning of certain aircraft types, and is connected with a ground joint at the bottom of an engine compartment before a decomposition part of the engine compartment of each aircraft is started; and residual hydraulic oil in the cabin is discharged without turning over the oil filter device, so that the working efficiency is enhanced, the working difficulty is reduced, and the oil filter device has been applied to an airplane electromechanical workshop.

A kind of diaphragm bubble point test device and method for simulating alkaline electrolysis working condition, including the first component (1) and the second component (2) located at the two sides of the diaphragm to be measured, sealing gasket (6) is arranged between the two, and the diaphragm to be measured is clamped to form first cavity (12) and second cavity (21);First cavity is provided with observation / liquid injection opening, second cavity is provided with air inlet assembly (22), liquid discharge assembly (23) and pressure detection assembly (24);First polar plate (13) and second polar plate (25) are respectively arranged in first cavity and second cavity and are connected with external power supply, for electrolysis treatment to diaphragm;When the device tests, first electrolyte is injected into two cavities, electrolysis is carried out under set current density or voltage, after electrolysis, external power supply is turned off and electrolyte in second cavity is emptied, then gas is introduced into second cavity to gradually pressurize, bubble condition is observed through first cavity side and corresponding pressure is read, that is, diaphragm bubble point pressure.

The utility model belongs to the technical field of diaphragm testing, and provides a diaphragm testing device which comprises a pressure storage tank used for introducing compressed gas for pressurization; the test box is used for accommodating a diaphragm to be tested, and the test box is connected with the pressure storage tank through a gas pipeline; the first valve is arranged between the pressure storage tank and the test box, the first valve is used for controlling opening and closing of the pressure storage tank, and the first valve is located at the upstream of the test box; the second valve is arranged at the downstream of the test box and is used for sealing the downstream of the test box; the first pressure gauge is arranged between the test box and the second valve and is used for monitoring a bubble point pressure value passing through the diaphragm to be tested; the pressure value when the compressed gas passes through the diaphragm to be tested is monitored through the first pressure gauge, when the pressure value of the first pressure gauge suddenly changes, the pressure value at the moment is the bubble point pressure value of the diaphragm to be tested, bubble point testing of the diaphragm to be tested is achieved, measurement errors caused by a visual method are avoided, and the accuracy of diaphragm testing is improved.

The invention relates to a method and a device for acquiring a fluid phase state in a nano space and electronic equipment, and relates to the technical field of oil reservoirs, the method comprises the following steps: acquiring an oil sample bubble point pressure P1 and an oil sample contact angle in a simulated shale pore structure; establishing a phase state model considering capillary force; inputting the characteristic parameters of the simulated shale pore structure, the characteristic parameters of the corresponding oil reservoir and the oil sample contact angle into a phase state model, and carrying out iterative calculation to obtain theoretical bubble point pressure P2; if yes, a phase state model meeting the requirement is obtained; and inputting a phase diagram temperature interval, carrying out iterative calculation by using a phase state model to obtain pressure, and drawing a phase diagram according to the temperature and the pressure. According to the acquisition method provided by the invention, the phase state model considering the capillary force effect is established, the bubble point pressure under the condition is obtained by combining the specific parameters and the oil sample contact angle, the bubble point pressure is compared with the experimental result, and the nanoscale phase state characteristics are obtained by combining the experimental data, so that a theoretical basis is provided for shale oil pressure control and stable production.

The application discloses a design method of a shell-boiling tube-condensing wound tube heat exchanger, according to the inlet and outlet temperatures of the tube and the shell, the dew point and bubble point of the working medium of the tube and the shell, the whole heat exchanger is divided into three parts, i.e. a tube-condensing shell-liquid section, a tube-condensing shell-boiling section and a tube-condensing shell-gas section, and the heat exchange capacity, the surface heat exchange coefficient of the tube and the shell, the comprehensive heat exchange coefficient, the pressure drop of the tube and the shell, the heat exchange area and the axial effective heat exchange length of the three parts of the wound tube heat exchanger are respectively designed and calculated; the tube is always in a gas-liquid mixed phase state of condensation phase change, the surface heat exchange coefficients of the tube and the shell are related to the dryness, therefore, the three parts of the wound tube heat exchanger are designed and calculated by using the finite volume method. The design method of the shell-boiling tube-condensing wound tube heat exchanger has the characteristics of high calculation precision, complete design method and high calculation efficiency, and has high commercial value and market promotion value.

The utility model discloses a self-cleaning bubble point analysis device, and belongs to the field of bubble point analysis devices. The bubble point analysis device comprises a bubble point analysis device body, a conical sieve connected with the bubble point analysis device body through an air pipe, a base arranged on the bubble point analysis device body, a detection cylinder arranged at the top end of the base and a drain valve arranged on the detection cylinder, a cleaning mechanism for cleaning the interior of the detection cylinder is arranged on the detection cylinder, and the cleaning mechanism comprises a water tank arranged on the bubble point analysis device body, a water pump arranged on the water tank and communicated with the interior of the water tank, a ring pipe sleeving the top of the detection cylinder and communicated with the output end of the water pump, and a spray head inserted into the top of the detection cylinder and communicated with the ring pipe. Through the design of the cleaning mechanism, efficient and convenient cleaning of the interior of the detection cylinder is achieved, operation is easy and convenient, the working efficiency is improved, and environmental pollution and potential safety hazards caused by improper treatment of residual test liquid are reduced.

The utility model relates to the technical field of bubbling point testing devices, in particular to a multichannel parallel bubbling point testing device which provides a place through a testing container, is sealed through a sealing device, is conducted through a communicating device, is bubbled through a bubbling device and is tested through a measuring device. The test container and the communication device are supported through the containing device, and the temperature and humidity in the test container are monitored through the monitoring device; comprising a test body; the device comprises a testing machine body and further comprises a testing container, a sealing device, a communicating device, a foaming device, a measuring device, a containing device and a monitoring device, the testing container, the communicating device, the foaming device and the containing device are all installed on the testing machine body, the sealing device is installed on the communicating device, the measuring device is installed on the foaming device, and the monitoring device is installed on the testing container.

The application provides a method for calculating saturated pressure of fluid in porous medium, which comprises the following steps: S1, calculating saturated pressure result value of fluid at given temperature without considering the influence of porous medium; S2, considering the influence of porous medium, analyzing single-phase stability under the saturated pressure result value to obtain initial equilibrium ratio for oil-gas two-phase flash calculation; S3, based on the type of main phase, saturated pressure result value and initial equilibrium ratio, carrying out iterative calculation of fluid flash in porous medium, and recording the corresponding pressure when the stop condition is met as the saturated pressure of fluid in porous medium. The application can accurately calculate the saturated pressure of oil-gas system with any composition under given temperature condition in the condition of porous medium, and avoid the problem of iteration divergence in flash calculation when searching for saturated pressure. If the object is crude oil, the bubble point pressure is calculated, and if the object is condensate gas, the dew point pressure is calculated, which provides key technical indicators for oil and gas field development.

The invention discloses a method, a system, a device and equipment for testing integrity of an exhaust filter, which are characterized in that under the condition that compressed air is communicated to the exhaust filter, an inlet pressure value and an outlet pressure change value of the exhaust filter are acquired in real time, and the integrity of a filter membrane is evaluated by integrating the inlet pressure value and the outlet pressure value. Due to the fact that the exhaust filter is provided with the exhaust hole, under the ideal condition, if the filter membrane is complete, the outlet pressure change value should be zero, but a threshold value is set for the outlet pressure change value by considering the influences of the compressed air flow speed, the pressure sensor sensitivity and the like. If the inlet pressure value exceeds a standard bubble point value provided by a manufacturer and used for detection, and the outlet pressure change value still does not exceed a set threshold value, it is indicated that the filter membrane passes the integrity test. By adopting the scheme of the invention, the complexity of the completion test of the exhaust filter can be greatly reduced, and meanwhile, the accuracy of the test result can be ensured.

A filter membrane bubble point detection device comprises a base assembly, a supporting assembly and an observation assembly, the supporting assembly provides good supporting performance for a filter membrane, and the accuracy of a test result is improved; the base assembly comprises a liquid collecting cavity, so that a test result is prevented from being influenced by blockage of an air inlet by feed liquid at the downstream of a filter membrane; the base assembly and the observation assembly are connected through the fixing assembly, it is guaranteed that the detection device can bear large pressure, and the application range is wider. The filter membrane bubble point detection device disclosed by the utility model is simple in structure, convenient to operate, high in test accuracy, capable of visually and intuitively detecting bubble point pressure of a microporous filter membrane in real time, and relatively high in practical value.

The invention provides a bubble point pressure measuring method and device and a pump control system, and belongs to the technical field of petroleum and natural gas exploration and development. The method comprises the following steps: pumping a drilling fluid into a pipeline of a downhole tool, and recording an initial induced voltage value generated by reflection of current fluid to light in the pipeline by using a first part comprising a graduated optical fiber probe; after the downhole tool is set, the formation fluid of the target depth in the current borehole is pumped at the gradually-increased pump speed, a pipeline pressure change curve is recorded, and the waveform of the induced voltage value generated by reflection of the current fluid to light in the pipeline along with time is recorded through the first component; and determining the moment of induced voltage value change caused by fluid phase state change from the waveform, and determining bubble point pressure according to the pipeline pressure value corresponding to the moment in the pipeline pressure change curve. Through combination of a fluid phase change curve and a pipeline pressure change curve detected by the optical fiber probe, rapid and accurate measurement of formation fluid bubble point pressure is realized.

The invention discloses a method for improving the test accuracy of an automatic detection device for the aperture of a membrane element, and the device comprises a programmable logic controller, various sensors, an electric proportional valve, a human-computer interface and the like. The device is mainly characterized in that the accuracy of test data such as the maximum bubbling pore diameter, the average pore diameter and the relative air permeability coefficient is improved by additionally arranging a miniature gas buffer tank in the device and changing the pressurization step length of an electric proportional valve. Through the operation and arrangement, the influence of air inlet pressure fluctuation on the stability of the test process and the reliability of results can be effectively reduced, and the situation that the test results of key parameters such as the maximum aperture, the average aperture and the aperture distribution are deviated due to the fact that a flow-pressure curve is distorted due to interference on bubble points is avoided; therefore, the test accuracy and repeatability of the detection device are improved.

The embodiment of the application discloses a kind of mixed working medium heat pump systems and control method, in mixed working medium heat pump system, the first pressure of mixed working medium that compressor exports is detected by first pressure sensor, the second pressure of mixed working medium that evaporator exports is detected by second pressure sensor, the opening of first expansion valve is controlled according to the first pressure and the dew point pressure of mixed working medium by controller, and the opening of second expansion valve is controlled according to the second pressure and the bubble point pressure of mixed working medium, since first expansion valve is set after condenser, second expansion valve is set before evaporator, can be adjusted by the opening of first expansion valve Condensation pressure of condenser is equal to dew point pressure, the evaporation pressure of evaporator is adjusted by the opening of second expansion valve equal to bubble point pressure, so that condensation pressure and evaporation pressure reach ideal state simultaneously, mixed working medium is completely liquefied in condenser, completely gasified in evaporator, so that heat pump system reaches optimal performance state.

The utility model discloses a tension adjusting mechanism of a bubble point film compound machine, which relates to the technical field of compound machines and comprises a base, an unwinding mechanism, a compound mechanism, a slitting winding mechanism and a slitter edge collecting mechanism are sequentially arranged at the upper end of the base from left to right, and a tension adjusting module is arranged on the inner side of the compound mechanism. The tension adjusting module comprises two pin shafts and two track plates, the front ends of the track plates are provided with adjusting tracks in a penetrating mode, rolling wheels are rotationally connected into the adjusting tracks, the inner sides of the two rolling wheels are rotationally connected with tension rollers through deep groove ball bearings, and the outer surfaces of the two ends of each tension roller are rotationally connected with connecting blocks; according to the utility model, the tension during material compounding is monitored and adjusted by arranging the penetrating shaft, the roller, the tension sensor and the tension adjusting module, so that the tension is ensured to be uniform, and the ventilation effect of the material after thermal compounding is further improved.

The invention discloses a microporous membrane testing tool and system and a bubble point pressure and permeable rate measuring method thereof.The microporous membrane testing tool comprises an upper assembly and a bottom cover, the bottom of the upper assembly is open, and a gas inlet, a liquid inlet and a liquid outlet are formed in the upper assembly; a first liquid outlet and a second liquid outlet are formed in the bottom cover, the bottom cover is detachably connected with the opening to seal the opening, and a liquid storage chamber is defined by the bottom cover and the upper assembly; the microporous membrane testing system comprises a gas supply unit, a liquid supply unit, a measuring device and a microporous membrane testing tool, wherein the gas supply unit comprises a gas source, a pressure control valve and a first valve; the liquid supply unit comprises a liquid tank, a liquid pump, a second valve, a third valve and a fourth valve; the measuring device is communicated with the second liquid outlet. The microporous membrane testing system provided by the invention can measure the bubble point pressure and the water permeability of the microporous membrane, realizes measurement of main performance parameters of the microporous membrane through one set of equipment, and has richer functions.

A method of operating a thermal management system associated with a turbine engine includes circulating a pericritical fluid through a cooling circuit; generating a sensor output using a phase detection sensor in fluid communication with the pericritical fluid, the sensor output including an impedance value; determining that the pericritical fluid has reached a bubble point based at least on a first characteristic change in the impedance value; determining that the pericritical fluid has reached a dew point based at least on a second characteristic change in the impedance value, the second characteristic change being different from the first characteristic change; and controlling at least one controllable component of the thermal management system based at least on the bubble point and the dew point.

The utility model belongs to the technical field of pressure vessel leakage detection, and provides a pressure vessel leakage detection device which comprises a supporting plate, a lifting structure is arranged on the front face of the supporting plate, and a sealing structure is arranged on the front face of the lifting structure. The closed structure comprises a back plate, a sealing ring is arranged on the periphery of the front face of the back plate, a plurality of magnets are evenly arranged on the periphery of the front end in the sealing ring, connecting plates are arranged at the four corners of the front face of the sealing ring, push rods are arranged on the back faces of the four connecting plates, and the back faces of the four push rods extend and penetrate through the back plate. The problems that according to existing equipment, a pressure container needs to be arranged in water, the position of bubbles blown out by leaked gas is observed, the distance between the bottom of the pressure container and a bubble point is determined through a graduated scale, the pressure container is taken out and then measured through the graduated scale are solved, and therefore the position of the bubble point can be accurately measured; however, a water source needs to be added again before each time of detection, so that time and water resources are wasted.

The utility model discloses a device for manually testing water pressure resistance and bubble point, which relates to the technical field of test equipment and comprises a first pipe body, a hoop, a second pipe body, a three-way connecting block and an exhaust valve core. The end, opposite to the first pipe body, of the second pipe body communicates with the three-way connecting block, the three-way connecting block is hollow, a cavity communicating with the second pipe body is formed, a first connector of the three-way connecting block communicates with a pressure storage tank through a first quick connector, and a second connector of the three-way connecting block communicates with a second pipe body through a second quick connector. A second connector of the three-way connecting block is connected with a pressure difference transmitter through a second quick connector, a fourth connector of the three-way connecting block is communicated with the exhaust valve element, and the second pipe body and the first pipe body are fixed through the hoop. And the water pressure resistance or bubble point of the diaphragm is tested by placing the diaphragm between the second pipe body and the first pipe body. The diaphragm integrity testing device is low in cost and simple to operate and clean, and can solve the problem of high diaphragm integrity testing cost in the prior art.