254 results about "Leakage test" patented technology

The invention relates to the technical field of electric leakage detection, in particular to an underground coal mine low-voltage remote electric leakage test system and method, and the system comprises a task allocation module, an off-state discrimination module, a signal transmission module, a state recognition module and a path receipt module. According to the method, the loop load level and the channel response condition are accurately evaluated, the task channel is dynamically matched, the task distribution blind area and error are reduced, the impedance difference structure and the continuous feedback trend are integrated to recognize the abnormal branch segment, and the driving and decoding mode is intelligently adjusted by using the signal amplitude and the interference proportion relation; signal transmission stability and data reduction accuracy are improved, a waveform drift trend and a load state combination are calculated in real time to accurately detect an electric leakage position, task initiation and response nodes are compared to ensure path synchronization legality, efficient linkage between load state change and signal drift is realized, electric leakage detection response speed and precision are improved, and reliability of electric leakage detection is improved. And the line abnormal state discrimination accuracy is enhanced.

The invention relates to the technical field of aero-engines, and discloses a labyrinth leakage rate test device and method suitable for low Reynolds number flow, the test device comprises an air inlet section, a labyrinth stator ring, a labyrinth rotor disc, an exhaust section and a flow meter, the tubular rectifier is mainly composed of a plurality of rectification circular tubes which are adjacent to one another. According to the invention, the tubular rectifier is arranged in the exhaust section, the flow leaked by the test labyrinth is rectified by using the tubular rectifier, and then flow measurement is carried out, so that measurement errors caused by airflow rotation and uneven airflow distribution under the condition of low Reynolds number can be inhibited; therefore, the flow measurement accuracy of the leakage airflow under the condition of the low Reynolds number is improved, a labyrinth flow characteristic test under the condition of the low Reynolds number can be conveniently and effectively carried out, labyrinth sealing design and accurate analysis of the leakage rate under the condition of the low Reynolds number are supported, and the problem that an existing labyrinth leakage analysis method is large in error under the condition of the low Reynolds number is avoided.

The invention discloses a combined sealing device frictional wear and external leakage test bed and a test method thereof, and aims to solve the problem that the existing device cannot accurately know the sealing wear. The test bench comprises a rack, a test piece, a stay wire sensor, an oil pipe and a hydraulic system, wherein an oil tank is arranged in the rack. The test piece comprises a test sealing assembly and a plunger, and the stay wire sensor is connected with a sealing combination structure. During testing, the hydraulic system drives the plunger and the sealing assembly to move relatively, the pull wire sensor measures displacement, friction force is calculated by combining pressure data to reflect abrasion, and the oil groove collects leaked oil. According to the invention, comprehensive testing of friction, wear and leakage is realized, sealing performance and wear rules under multiple working conditions can be analyzed, the structure is convenient to observe and operate, and optimization of the sealing structure is facilitated.

The present invention relates to a refrigerant manifold applied to a cooling module applied to a vehicle cooling system. According to the refrigerant manifold of the present invention, by forming a hole or a slit in a middle plate and a housing of parts to which in / out ports are connected or parts to which in / out pipes are connected to discharge a leaked fluid to the outside when leakage occurs inside a manifold, it is possible to increase the accuracy of a leakage test.

The invention belongs to the technical field of battery safety performance detection, particularly relates to leakage testing equipment for an aluminum alloy battery tray, and aims to solve the problems that the position of a leakage point is difficult to quickly and effectively determine after leakage occurs during leakage testing, time needs to be spent on finding the leakage point, and the leakage testing efficiency of the leakage testing equipment is affected. The outer wall of the annular support is fixedly connected with an outer annular plate, the top of the annular support is provided with an annular frame, the annular frame is provided with a leakage test fixed point module, the top of the annular frame is fixedly connected with a fixed support, and the fixed support is provided with a leakage test fixed module. The leakage testing equipment for the aluminum alloy battery tray has the effect of improving the leakage testing operation efficiency, gas is adopted for detection when the leakage testing equipment is used, and when a leakage point is detected, the leakage testing equipment can give an alarm at the position of the leakage point, so that workers can quickly determine the leakage point conveniently, and the using effect of the leakage testing equipment is improved.

The present invention relates to a test method and testing apparatus for detecting leak- ages in valve units, such as ball valves, comprising mandrels for sealing off the connection ends of the valve housing. At least one robotic arm with at least one gas detection probe is moved into position relative to the external surface of the valve housing or a gas leakage channel in the mandrels. Air trapped in the enclosed valve housing is evacuated by at least one evacuation unit. Tracer gas is supplied into the enclosed valve housing and any gas leakage is detected by the gas detection probes. A control unit controls the movement of the robotic arm to position the gas detection probe correctly relative to the valve unit.

The invention provides a gasket sealing performance testing device and a testing method thereof, and solves the problems that an existing sealing gasket leakage testing device is complex in structure and difficult to quickly and accurately test the high-pressure sealing performance of an annular sealing gasket. According to the technical scheme, a lower pressing block arranged at the telescopic end of a hydraulic oil cylinder of a press workbench and a bearing disc clamp a sealing gasket to form a hollow cavity in the middle of the sealing gasket, and a communicating hole in the bottom of the bearing disc is connected with a standard volume gas tank and high-pressure gas pressurizing equipment through a main testing pipeline of a testing pipeline via a low-pressure pipeline and a high-pressure pipeline respectively. According to the testing method, the leaked gas amount and the gas leakage rate are calculated according to a measured value of the pressure sensor and the volume and pressure change relation of the Boyle law. Therefore, the device is simple in structure, convenient and rapid to test, outstanding in gasket sealing leakage test capability, capable of meeting corresponding test requirements, convenient for temperature environment adjustment and capable of improving the accuracy of test results.

The invention provides a negative pressure suction detection device for a paper cup leakage test, and belongs to the field of paper cup detection, and the negative pressure suction detection device comprises a first air bin, a first air pump, a motor, a threaded rod, a top plate and a lug plate, the top plate is arranged above the first air bin, the lug plate is fixedly connected to the outer wall of the top plate, an inflation assembly is located outside the lug plate, and a clamping assembly is arranged on the outer wall of the top plate. The clamping assembly is located at the top of the first air bin, and the lifting assembly is located in the first air bin. According to the paper cup, a top plate is moved, a first air bag is moved into the paper cup, a second air pump is controlled to inflate the interior of a second air bin through a first pipeline and a second pipeline, at the moment, air in the second air bin enters the first air bag, and the first air bag expands under the action of air pressure; the air bag is arranged on the paper cup and is attached to the inner wall of the paper cup, at the moment, the air bag can seal the paper cup, and therefore the problem that an existing paper cup leakage detection device is insufficient in sealing performance of the paper cup is solved.

The invention provides a method and system for detecting inner leakage of a positive pressure helium detection valve, and relates to the technical field of valve sealing performance detection.The method comprises the steps that test gas with rated working pressure is applied to a to-be-detected valve, the change of the internal pressure of the valve is monitored in real time under the rated working pressure, and positive pressure inner leakage pre-detection is conducted; if the pressure is kept stable, a judgment result of passing the pre-detection is obtained, and if the pressure fluctuation exceeds a set threshold value, the test is terminated and an alarm signal is sent out; and based on the judgment result of the pre-detection, in the process of continuously applying the test gas, controlling the temperature condition of the to-be-tested valve, repeatedly executing the positive pressure inner leakage test at different temperatures, and recording the basic leakage rate at each temperature point to obtain an initial dynamic sealing performance curve. According to the invention, accurate correction and multi-dimensional data fusion of valve leakage rate detection data can be realized, and the accuracy of inner leakage detection of the valve under a temperature alternating working condition is improved.

The invention relates to an electric leakage test method for an intelligent power module, which comprises the following steps: S1, providing the intelligent power module which comprises a control chip, an inverter unit and a pin assembly, and the inverter unit comprises an upper bridge arm circuit connected with a U / V / W phase output end and the control chip and a lower bridge arm circuit connected with an NU / NV / NW phase output end and the control chip; s2, the U-phase output end is in short circuit with bootstrap voltage VBU, the V-phase output end is in short circuit with bootstrap voltage VBV, and the W-phase output end is in short circuit with bootstrap voltage VBW; s4, starting a 15V low-voltage power supply and a 5V low-voltage power supply; s5, starting a high-voltage power supply DC to apply 600V voltage to the NU / NV / NW phase output end from the U / V / W phase output end; s6, after the electric leakage values of the U-phase output end, the V-phase output end, the W-phase output end, the NU-phase output end, the NV-phase output end and the NW-phase output end are read through the monitoring equipment, electric leakage testing is completed; and S7, sequentially disconnecting the relay and the power supply. According to the method provided by the invention, the product test yield is improved, and the product reliability and the test safety are ensured.

The utility model provides an explosion-proof electric leakage test device. The explosion-proof electric leakage test device comprises a junction box, an input assembly and at least two output assemblies, the input assembly comprises an input electric connector, a sensor input terminal and an input resistor; the output assembly comprises an output electric connector, a sensor output terminal and an output resistor; the sensor output terminals of the at least two output assemblies are respectively connected with the sensor input terminals through circuits, and the at least two output assemblies are arranged in parallel; wherein the input electric connector is connected with an external circuit, and the output electric connector is connected with the external circuit or a ground wire; current in an external circuit passes through the input electric connector, the sensor input terminal, the input resistor, the output resistor, the sensor output terminal and the output electric connector and then flows to other external circuits or ground wires so as to carry out an electric leakage test. According to the utility model, by integrating resistors with different resistance values and setting a flexible circuit access mode, the efficiency and the safety of a leakage test are significantly improved.

A rolling-element bearing includes first and second concentric ring assemblies mounted for relative rotation. The first ring assembly includes a first rolling ring and a first sealing ring supporting first and second seal elements each having a lip. The second ring assembly includes a second rolling ring and a second sealing ring contacted by the lips of the first and second seal elements. The first sealing ring includes a first sealing member radially spaced from the first seal element and a first leakage test channel having an inlet between the first sealing member and the first seal element and an outlet at an external surface of the first sealing ring, and / or the second sealing ring includes second and third sealing members and a second leakage test channel having an inlet between the second and third sealing members and an outlet at an external surface of the second sealing ring.

The invention discloses a real-time leakage monitoring system for a high-pressure-resistant plastic butterfly valve. The real-time leakage monitoring system comprises an acquisition module, a physical analysis module, a fusion module and an early warning module, wherein the physical analysis module is used for carrying out a leakage test on the high-pressure-resistant plastic butterfly valve through physical and mechanical analysis; and the fusion module is used for performing deviation calculation on the static health benchmark, the dynamic health benchmark, the strain health benchmark, the quiet benchmark and the health torque benchmark, and obtaining specific performance characteristics in each leakage state through a linear equation set and double-cosine finite integral transformation. Aiming at the material characteristics of the high-pressure-resistant plastic butterfly valve, a multi-dimensional and refined health reference system is constructed; an advanced mathematical model based on multi-sensor data fusion, a linear equation set and double-cosine finite integral transformation is introduced, and accurate recognition, quantification and physical characteristic representation of the leakage state are achieved; and the sealing performance can be evaluated under a non-fluid working condition, so that a comprehensive and intelligent real-time leakage monitoring scheme is provided.

The utility model relates to a pressure test and leakage test device for a joint of oil and gas pipelines, and relates to the technical field of pipeline connection. The device comprises a clamping piece, the clamping piece comprises two semicircular clamps hinged to each other, connecting rods are arranged on the side walls of the two sides of each semicircular clamp, fixing blocks are arranged at the ends, away from the semicircular clamps, of the connecting rods, sliding holes are formed in the fixing blocks in the thickness direction, and pressing rods are slidably connected into the sliding holes. The pressing rod is arranged in the direction facing the outer wall of the pipeline, and an arc-shaped adsorption suction cup is arranged at the end, close to the pipeline, of the pressing rod. The device has the effects of improving the stability of the clamping piece when the clamping piece is installed on the outer wall of the pipeline and improving the accuracy of pressure test and leakage test.

The utility model belongs to the field of hydraulic valves, and particularly relates to a leakage test system for an ESC product. A leakage test system for an ESC product comprises a gas source which is a nitrogen gas source and a test board, and the test board is used for fixing a to-be-tested workpiece and realizing connection between the to-be-tested workpiece and the gas source; the device further comprises a first air pressure sensor, a second air pressure sensor and a third air pressure sensor, the first air pressure sensor is used for detecting the pressure of the air source, the second air pressure sensor is used for detecting the pressure of the air inlet of the to-be-detected workpiece, and the third air pressure sensor is used for detecting the pressure of the air outlet of the to-be-detected workpiece. The signal processing unit is used for acquiring and processing signals of the second air pressure sensor and the third air pressure sensor; the control unit is connected with the to-be-tested workpiece and used for driving the to-be-tested workpiece to simulate actual working conditions, and the test accuracy and the product quality are improved.

The utility model belongs to the technical field of valve test equipment, and particularly relates to a valve leakage test device which comprises a rack, two sealing plates, a liquid inlet pipe, a liquid outlet pipe, a first pressure measuring instrument, a liquid storage tank, a pressurizing mechanism and a second pressure measuring instrument. Two sealing plates are arranged on the rack, the two sealing plates are in sealing connection with a medium inlet and a medium outlet of the valve respectively, a liquid inlet pipe communicated with the medium inlet is arranged on one sealing plate, a liquid outlet pipe communicated with the medium outlet is arranged on the other sealing plate, and a first pressure measuring instrument is arranged on the liquid outlet pipe; a pressurizing chamber is arranged in the liquid storage tank; the pressurizing mechanism comprises an adjusting rod capable of partially entering the pressurizing chamber and an adjusting piece capable of increasing or decreasing the volume of the adjusting rod entering the pressurizing chamber; the second pressure measuring instrument can monitor the pressure of the liquid in the pressurizing chamber; compared with the prior art, when the test device is used for carrying out a leakage test on the valve, the test pressure can be adjusted in a sectional mode, and the sealing performance of the valve can be better evaluated.

The invention relates to the technical field of servo valve testing, and particularly discloses an electro-hydraulic servo valve test bench and a test method thereof, and the test bench comprises a calibration basis obtaining module which constructs each correction basis; the static performance test module performs static performance synchronous test and signal compensation on the tested electro-hydraulic servo valve based on the channel delay compensation table to obtain a static performance index; the dynamic performance test module performs dynamic frequency sweeping test and distortion correction on the tested electro-hydraulic servo valve based on the channel delay compensation table and the frequency-amplitude compensation coefficient mapping table to obtain a dynamic performance index; the internal leakage performance test module is used for performing internal leakage test and leakage amount compensation on the tested electro-hydraulic servo valve based on a temperature-viscosity-internal leakage amount three-dimensional correction model of the hydraulic oil source to obtain an internal leakage performance index; the test result summarization module obtains a test result based on the indexes; the integrated precise test of the static and dynamic performance and the internal leakage performance of the servo valve is realized.

The invention relates to leakage testing equipment with an internal expansion seal. The leakage testing equipment comprises a testing machine; a test platform; a test rack; the supporting jig is used for placing a to-be-tested product; front and rear hole plugging assemblies; an upper plugging assembly; the inflation assembly inflates the interior of the to-be-tested product from a through hole in the side wall of the to-be-tested product; a side plugging assembly; and the front and rear hole plugging assembly, the upper plugging assembly, the inflation assembly, the side surface plugging assembly and the supporting jig are matched to form internal sealing of the to-be-tested product. According to the leakage test equipment with the internal expansion seal, in the leakage test process, end face sealing, inner hole sealing and end face sealing are achieved, a product is sealed, and a workpiece is not crushed. The inner hole sealing tool can accurately enter the inner hole of the product, keeps consistency and stability, does not scratch the workpiece, is suitable for batch automatic production, accurately meets process requirements, and carries out leakage test on the product.

The utility model discloses a valve leakage test device, which relates to the technical field of valve quality detection and comprises a first test pipeline, a liquid input pipeline, a gas input pipeline, a first air compression device, a recovery pipeline, a liquid flow test assembly and a gas flow test assembly. The liquid input pipeline is connected with the first test pipeline in an on-off manner; the gas input pipeline is connected with the first test pipeline in an on-off manner; the first air compression device is used for driving liquid or gas to enter the first experiment pipeline; one end of the recovery pipeline is connected with the first test pipeline in an on-off manner, the other end of the recovery pipeline is communicated with the first container, and a driving pump is arranged on the recovery pipeline; the gas flow testing assembly is used for being connected with the other end of the valve to be tested; on the basis that various media can be measured, it is guaranteed that a single medium is used in the measurement process, and the accuracy of a test result is improved.

The utility model discloses a heat exchanger vacuum-pumping leakage test system, which comprises a bottom plate, the upper surface of the bottom plate is fixedly connected with a support, the upper surface of the support is fixedly connected with a shell, the upper surface of the shell is communicated with a connecting pipe, the side surface of the shell is fixedly connected with a pipe plate, the side surface of the pipe plate is provided with a flange, and the flange is provided with a flange. The side, away from the tube plate, of the flange is fixedly connected with a tube box. The device comprises a fixing plate, the upper surface of the fixing plate is slidably connected with a supporting plate, a fastening bolt is arranged in the supporting plate, the upper surface of the supporting plate is fixedly connected with a vacuum pump and an air heater, the side surface of the vacuum pump communicates with a vacuum pipe, and a vacuum gauge is arranged at the end of the vacuum pipe. Through the above structure, the vacuum pump is slidably arranged on the surface of the fixing plate, and the fastening bolts are arranged to fix the vacuum pump, so that the position of the vacuum pump can be conveniently and finely adjusted after the device is fixed, vacuumizing detection is more accurate, and a vacuum tube junction is prevented from affecting a detection result.

The invention relates to a method for operating a mobile tank system (1) for a fuel gas, in particular for hydrogen or natural gas, comprising at least one pressurized gas container (2) in which the fuel gas is stored under pressure, and a control unit (3) with the aid of which sensor data from at least one sensor (4) installed in the tank system (1) are read and evaluated. According to the invention, in phases in which the tank system (1) is out of operation, the control unit (3) is temporarily activated via an implemented wake-up function and used to carry out a leakage test.

The application relates to the technical field of aircraft air conditioning system detection, in particular to an airplane trimming air valve leakage testing device and method. The device comprises a support structure, an input shaft, an output shaft, a valve and a position adjusting structure. One side of the input shaft is provided with a first clamping surface, and the input shaft is provided with a first channel for inputting test gas. The first channel is communicated with the first clamping surface. One side of the output shaft is provided with a second clamping surface, and the second clamping surface and the first clamping surface are oppositely arranged for clamping the airplane trimming air valve to be tested. The output shaft is provided with a second channel, and the second channel is communicated with the second clamping surface. The valve is used for controlling the opening or closing of the second channel during the test. The position adjusting structure is used for adjusting and locking the distance between the input shaft and the output shaft. The device solves the problem that, in the existing maintenance operation, due to the lack of standardized tooling, the air valve gas path interface cannot be effectively connected to implement the quantitative indexes of the manufacturer's maintenance manual, and fills the gap of the leakage testing standardized detection tool.

The utility model discloses engineering supervision wall surface anti-seepage test equipment, which belongs to the technical field of anti-seepage tests, and is characterized by comprising an inspection base, the bottom of the inspection base is rotatably connected with universal wheels, and the top of the inspection base is movably connected with a drainage mechanism. A water injection mechanism is movably connected to the outer side of the drainage mechanism, an electronic telescopic rod drives a limiting block to slide in a limiting frame, so that the left side and the right side of a test wall can be stamped respectively, uniform stamping tests with various pressures and multiple reverse directions can be conducted on the test wall, and thermal inductance equipment observes the test wall; water on the surface of the wall can be scraped during water injection operation so that the water can fall into a liquid accumulation tank, test water needs to be discharged in time after being stamped, damage to the test wall caused by the fact that the test water stays on the surface of the test wall is prevented, and excessive water is collected and treated, so that the water leakage condition of the wall can be detected. And the water can be discharged or reused.

The traction motor (10) features: a fluid-tight stator chamber (38) with a motor stator (30), wherein the stator chamber (38) has a fluid inlet (36) and a fluid outlet (37), and a rotor chamber (28) with a motor rotor (20), wherein the rotor chamber (28) has an air inlet (26) and an air outlet (27). The examination order (100) indicates: a test gas source (102) with a detectable test gas (103) which is fluidically connected to the stator chamber fluid inlet (36) via a fluidic inflow control (105), a switchable outlet valve (110) connected to the stator chamber fluid outlet (37), a test gas detector (112) that can detect the test gas (103) and that is fluidically connected to the rotor chamber air outlet (27), and a vacuum gas pump (114) through which rotor chamber air is pumped or drawn from the rotor chamber (28) through the rotor chamber air outlet (27) to the test gas detector (112), and an electronic test control (120) which is connected via signal links to the test gas inflow control (105), the stator chamber outlet valve (110) and the test gas detector (112). The electronic test control (120) generates the following process steps: Introducing the test gas (103) from the test gas source (102) into the stator chamber (38) such that the stator chamber gas pressure (p38) is at a defined above-atmospheric test gas overpressure (ps), and Activating the gas pump (114) and the test gas detector (112), thereby quantitatively detecting leakage test gas flowing into the air-filled rotor chamber (28).

The invention discloses a system and a method for measuring leakage current of a dry-type air-core reactor, and belongs to the technical field of electrics. The measurement system comprises a measurement controller, a test transformer, a high-voltage rectifier tube and a leakage current measurement meter, the measurement controller is used for accessing an input voltage through an AC power supply, the test transformer is used for amplifying the input voltage according to a preset proportion and outputting a test voltage, the high-voltage rectifier tube is used for converting the test voltage into a DC voltage, the DC voltage is accessed to a tested dry-type air-core reactor, and the tested dry-type air-core reactor is connected to the test transformer. The testing device is used for testing the tested dry-type air-core reactor, and the leakage current measuring meter is used for measuring the leakage current of the tested dry-type air-core reactor in the testing process. According to the invention, leakage tests of different voltage levels can be satisfied, and leakage current measurement can be carried out.

The utility model discloses an electric leakage test detection loop and a release, and belongs to the technical field of low-voltage electric appliances. The electric leakage test detection loop comprises a first connecting piece and a first torsion spring, wherein the first torsion spring is connected with the first connecting piece; a first breakpoint is formed between the second torsional spring and the first connecting piece, and the second torsional spring can abut against the first connecting piece; the first torsional spring and the second connecting piece are second breakpoints, and the first torsional spring can abut against the second connecting piece; one end, deviating from the first connector, of the second torsion spring is connected with the third connector; one end of the second connecting piece away from the first torsion spring is connected with the circuit board. One end of the third connecting piece away from the second torsion spring is connected with the circuit board. The first torsion spring and the second torsion spring are arranged on the outer side of the release shell, so that the space in the release shell is saved, the purpose of reducing the design space of the electric leakage release is achieved, and the dielectric property of a product is improved. And by arranging the two breakpoints, mistaken touch of an operator is avoided, and high stability and reliability are achieved.

The utility model provides a valve leakage testing device and detection equipment for new energy automobile parts. The valve leakage testing device is used for air tightness detection of a valve and comprises a rack, a driving assembly, a pressing assembly, a filling block and a positioning block, the driving assembly comprises a first air cylinder, the positioning block is provided with a containing cavity, the valve is located in the containing cavity, and the valve is connected with the filling block and the positioning block in a sealed mode; the driving assembly further comprises a second air cylinder, and the second air cylinder is fixedly connected to the bottom of the rack. The valve is in sealed connection with the filling block and the positioning block, so that the valve is sealed and isolated from the outside air, and the hydraulic cavity of the valve is sealed and isolated from the motor cavity, that is, the airtightness detection of the valve is performed under the condition of fitting the assembly environment of the valve, the detection result is matched with the actual application scene, and the leakage test accuracy is improved. Furthermore, the valve is pressed and automatically ejected through the first cylinder and the second cylinder, and an operator only needs to place and take the product, so that the leakage test time is shortened, and the detection efficiency is improved.

The utility model discloses an electric leakage test circuit, an electric leakage protection circuit and an electric leakage circuit breaker, which can safely and effectively simulate electric leakage conditions through the electric leakage test circuit, accurately sense electric leakage signals through a residual current transformer, prevent current backflow through a diode D15 and guarantee test accuracy. Meanwhile, the electric leakage signal processing circuit, the anti-surge circuit, the rectifying circuit and other modules are integrated to form an electric leakage protection system with complete functions, and stable operation of the circuit is ensured. The system not only improves the electric leakage detection precision and safety, but also optimizes the circuit structure and functions, provides powerful guarantee for safe and stable operation of an electric power system, and has remarkable beneficial effects.

A method of testing an analytical valve assembly of a gas chromatograph includes fluidly coupling first and second activation ports of the analytical valve assembly to a manifold. The activation port is configured to control first and second valving mechanisms that selectively couple and block fluid communication between first and second pairs of analysis ports of the analysis valve assembly in response to an applied pressure. Less than all of the analysis ports are fluidly coupled to the manifold. Gas is applied to the manifold under pressure, and the first and second activation ports and less than all of the analysis ports are pressurized. A flow of the gas through the manifold is measured, and a leak in the analytical valve assembly is detected based on the measured flow. The invention also provides a leakage test fixture and a test system.

The application discloses a kind of synchronous double liquid grouting device test methods, comprising the following steps: layout working condition simulation system connects the inner cavity of synchronous double liquid grouting pipe, and layout power control system connects the piston rod of synchronous double liquid grouting pipe;Load is applied to piston rod by power control system, and working condition simulation system controls piston rod to reciprocate along inner cavity, executes wear test;Different positions of piston rod are locked by power control system, and according to working condition simulation system, pressure oil is output to the inner cavity of synchronous double liquid grouting pipe, and executes pressure leakage test.The beneficial effects of the application: the working scene of the synchronous double liquid grouting device is simulated by the hydraulic system in the application to test the synchronous double liquid grouting device.No need to install real machine, can effectively reduce test cost, also can reduce test difficulty and requirement to test space.