333 results about "Leak testing" patented technology

Provided herein is a device for simultaneous intraoperative leak testing and visualisation of a heart valve seat, the device comprising an end cap configured to engage with and to sealingly close an opening of a tubular vascular graft, the end cap comprising a backing portion, a connector portion, a view port, and at least one fluid conduit element, the connector portion comprising a distal end dimensioned for placement inside of the opening, a first fastening element comprising an external thread, a second fastening element comprising an internal thread and configured to be rotated onto the first fastening element, and the external and internal threads are adapted such that the first and second fastening elements are fittingly engaged with the tubular vascular graft scalingly secured therebetween by less than one rotation of the second fastening element around the outer circumference.

The present application relates to the field of crane pipe leak testing, and specifically discloses a crane pipe leak testing system for liquid chlorine unloading. The crane pipe includes a fixed pipe and a movable pipe, and a heat insulation structure is arranged on the fixed pipe and the movable pipe; the heat insulation structure is used to insulate the inside of the fixed pipe and the movable pipe; a temperature detection component for obtaining the temperature of the heat insulation structure is arranged at the heat insulation structure; a socket matching the filling port of the tank truck is formed on the fixed pipe; the movable pipe is inserted into the socket so that the fixed pipe and the movable pipe form a closed loop; a gas thermal imaging component is arranged on the fixed pipe, and the gas thermal imaging component forms a gas detection area, and the gas detection area covers the movable pipe. The present application has the effect of ensuring that the liquid chlorine will not be vaporized when unloading the truck, and better protecting the crane pipe, while using the temperature detection component and the gas thermal imaging component to detect the temperature outside the heat insulation structure, and when the crane pipe leaks, it will cause the temperature outside the heat insulation structure to change significantly, thereby using liquid chlorine to directly perform leak testing.

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 utility model relates to the technical field of engine detection, and discloses an engine air leakage detection device comprising a support frame; the nitrogen supply part is arranged on the support frame and is connected with any one of a plurality of cylinders of the tested engine; the first gas detection part is used for detecting the gas leakage amount of a cylinder gasket between the detected cylinder and the adjacent cylinder; the second gas detection component is used for detecting the gas leakage amount of the exhaust valve; the third gas detection component is used for detecting the gas leakage amount of the intake valve; the fourth gas detection part is connected with an oil filler cap of the detected engine and is used for detecting the gas leakage rate of the piston ring; and the fifth gas detection part is connected with the cooling liquid degassing pipe and is used for detecting the gas leakage amount of the detected air cylinder leaking gas to the cooling liquid channel of the detected engine through the air cylinder gasket. The detection device can perform leakage test on a plurality of parts at the same time, and the integration level is high.

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.

A leak test device (44) is designed to test leaks between a first conduit (38) and a second conduit (40), which may be part of a heat exchange system. The apparatus (44) includes a first channel (48) and a second channel (50), a flow control system (46), and flow sensors (F1.1, F1.2, F2.1, F2.2) located at respective locations within each respective channel (48, 50). Each passage (48, 50) is connected to a conduit (38, 40) to form a respective closed-loop system, and a flow control system (46) is adapted to actively maintain fluid pressure at a set level within each closed-loop system. In a set pressure closed loop system, any detected flow is indicative of a leak. The use of a plurality of flow sensors (F1.1, F1.2, F2.1, F2.2) at different locations allows the possible leakage locations to be distinguished. The shut-off valve may provide a mechanism by which the test device can control a test sequence to be performed on the conduit (38, 40). The apparatus may be used online to test various designs of the heat exchanger, and may be amplified to test complex systems.

A battery case leak testing device includes a housing having a testing port. A pump is in fluid communication with the testing port and is configured to generate a prescribed pressure at the testing port. A pressure sensor is in fluid communication with the testing port to measure fluid pressure at the testing port. A controller is in operative communication with the pump and the pressure sensor, and is configured to facilitate operation of the pump in a first mode and a second mode. In the first mode, the pump operates to generate a first prescribed pressure at the testing port. In the second mode, the pump operates to generate a second prescribed pressure at the testing port. The controller transitions the pump from the first mode to the second mode when the pressure sensor measures a prescribed pressure characteristic when the pump is operating in the first mode.

The invention discloses a thermal vacuum and thermal cycle test system for a space micropump, and aims to solve the problems that a medium leaks in a high and low temperature test process of an existing test system, the space micropump cannot operate normally after air enters a test loop, and even the test cannot be carried out. The device comprises a thermal circulation assembly, a transfer injection tank, a connecting piece, a first hand valve, a first pressure gauge, a vacuum pump, a second hand valve, a second pressure gauge, a pressure reducer and an air source, the thermal circulation assembly is connected with the first hand valve and the second hand valve through the connecting piece, the first hand valve is connected with the first pressure gauge through a connecting pipeline, and the first pressure gauge is connected with the vacuum pump through a pipeline; the second hand valve is connected with a long guide pipe connector of the transfer injection tank through a pipeline, a short guide pipe connector of the transfer injection tank is connected with a second pressure gauge through a pipeline, and the second pressure gauge is connected to a pressure reducer which is connected with an air source. The sealing device is simple in structure, easy to machine and high in sealing reliability. The device is used for high and low temperature test performance testing of the space micropump and the pump valve assembly.

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 relates to a steady-state flow testing machine for an artificial heart valve. The steady-state flow testing machine comprises a forward flow testing loop formed by sequentially connecting a liquid storage system, a circulating pump, a rectifying system, a testing clamping system and a forward flow return pipe, and an anti-leakage return pipe connected between the testing clamping system and the liquid storage system, the test clamping system comprises a front-end fixed cavity, a rear-end movable cavity and a valve carrier mounted at the connecting end of the front-end fixed cavity and the rear-end movable cavity, and pressure sensors are mounted on the front-end fixed cavity and the rear-end movable cavity respectively; and the forward flow return pipe and the reverse leakage return pipe are respectively provided with a flow sensor. Forward flow and reverse leakage are detected through independent flow sensors respectively, meanwhile, the precision of forward flow testing and reverse leakage testing is guaranteed, and the accuracy of the testing result is improved.

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.

A method for manufacturing an electrical machine, characterized in that the method comprises the following steps: - Providing an engine component (10), wherein the engine component (10) has at least one sealing surface (20) for arrangement in an injection molding tool (2) which is designed to keep the engine component (10) partially free of potting compound (30) during overmolding with potting compound (30); - Arranging and sealing the motor component (10) over the at least one sealing surface (20) in a leak test device (1); - Performing a leak test; - Arranging and sealing the motor component (10) in an injection molding tool (2) over the at least one sealing surface (30) and overmolding with potting compound (30).

The invention relates to a filtering method (200) for a leak test cycle of a certain type of object to be tested, for constructing a database capable of determining at least one reference value relating to a leak test of said object type, in particular suitable for an early leak detection method; the invention relates to a method (200) for measuring a test cycle comprising the measurement of a physical quantity related to the degree of leakage in at least one part of an object to be tested or in a peripheral cavity of the object to be tested, said method (200) comprising at least the following steps: determining (E2) a deviation between the measured values of the physical quantity at the starting time and the ending time of the test cycle, referred to as a total deviation; the total deviation is compared (E3) with a total deviation reference value.

The utility model discloses a cavity for detecting the air tightness of an accommodated workpiece and equipment thereof, the cavity comprises a lower cavity and an upper cavity, the lower cavity comprises a lower cavity top, a lower cavity bottom, a flat plate assembly, a first rod, a second rod and a third rod; the flat plate assembly comprises a first plate and a second plate. The first rod penetrates through the first plate through hole, and the two ends of the first rod are movably connected with the top and the bottom of the lower cavity correspondingly. The second rod penetrates through the second plate opening and is movably connected with the flat plate assembly, a first tooth-shaped transmission part is formed on the surface of the first end of the second rod, and a limiting part is arranged at the second end of the second rod; a tooth-shaped transmission part is formed on the surface of the third rod, and the first end of the third rod is movably connected with the bottom of the lower cavity. According to the invention, by arranging the adjustable limiting part, detection of workpieces with different sizes is realized; and through combination of the sliding rails in the cavity and the rods, position arrangement of the workpiece in six directions is achieved, the workpiece can make full contact with helium, and the utilization rate of the helium is increased.

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).

A leak testing apparatus is provided, for testing connections between tubes penetrating a plate material. A housing is disclosed having a central cylindrical longitudinal hollow. A piston arranged inside housing, where a distal end of the piston in use is inserted into the tube. A seal arranged circumferentially on the piston, such that in use the second seal may be brought into sealing engagement with the tube. A second end of the housing is closed by an endcap where at least one channel is provided longitudinally in the piston and a connection to the channel allowing connection to a source of pressurized medium is provided, connecting the pressurized medium to a space, in use limited by the first seal, the plate material, the tube and the second seal, and optionally part of the piston and part of the housing.

A valve device for a power storage device that can, when a gas is generated inside the power storage device, release the gas to the outside, and can highly prevent the intrusion of moisture from an external environment, the power storage device including: a power storage device element and a housing in which the element is housed, the valve device being attached to the housing, wherein the valve device is configured to reduce an internal pressure of the housing when the pressure increases due to a gas generated inside, and in the valve device, an amount of helium leakage from a secondary side to a primary side is 5.0×10−11 Pa·m3 / sec or more and 5.0×10−6 Pa·m3 / sec or less, as measured in a 25° C. environment, in accordance with a method defined in “Vacuum spraying method (spray method)” of “Method for helium leak testing” in JIS Z 2331: 2006.

This utility model relates to the field of automotive valve body leakage testing technology, specifically a fixture for automotive valve body leakage testing, including a water tank. A detection mechanism is rotatably mounted on the water tank, and a long rod is fixed to the end of the detection mechanism. A sealing mechanism is fixed to the long rod, and the sealing mechanism includes a base plate and a rotating rod. The end of the long rod is bolted to the base plate, and a stop block is fixed to the base plate. A washer is engaged on the stop block. A rotating rod is rotatably mounted on the base plate, and a sliding rod is threaded onto the rotating rod. A locking rod is fixedly mounted on the sliding rod, and a stop rod abuts against the locking rod. Two support blocks are symmetrically fixed to the stop block, and the stop rod is rotatably connected to the support blocks. The top of the stop rod abuts against the washer. The linkage structure of the rotating rod, sliding rod, and stop rod allows the stop rod to apply uniform and adjustable pressure to the washer, ensuring that the washer fits tightly against the valve body end, avoiding the sealing failure caused by the washer easily lifting or shifting in traditional fixtures.

A vacuum relief valve for a railroad tank car and methods for using the same to test the vacuum relief valve for leaks without requiring removal of the valve from the railroad tank car are described herein. According to one aspect of the invention, a vacuum relief valve described herein may be inspected for leaks without removing the vacuum relief valve from the railroad tank car by using two or more access openings located on the body of the vacuum relief valve. According to another aspect of the invention, a vacuum relief valve described herein may be inspected for leaks without removing the vacuum relief valve from the railroad tank car by using an opening to an interior cavity of the valve body that is revealed by rotating a cover from a closed position to an open position.

The leakage testing device comprises a tank body and an oil level gauge body, the left end of the tank body is provided with an air inlet, the left end of the tank body is provided with a pressure relief valve, the right end of the tank body is provided with a pressure monitoring meter, the upper end of the tank body is provided with an oil level gauge connecting port, and the upper end of the oil level gauge connecting port is provided with a threaded connecting ring. The oil level indicator body comprises an oil level indicator pipe body and a glass observation window, the glass observation window is installed on the side face of the oil level indicator pipe body, a matching ring is installed on the outer surface of the oil level indicator pipe body, and a threaded connector is installed at the lower end of the matching ring. Air with specified pressure is pumped into the air inlet, the pressure monitoring meter is observed, inflation is stopped after the specified pressure is reached, soapy water can be coated around the glass observation window after pressurization is completed, whether bubbles are generated or whether the air pressure is reduced or not is observed at specified time, and therefore the purpose of checking is achieved.

A leak test station (50) for containers (C) housed in respective transport carriers (3), characterized in that it comprises a test carousel (51) which can rotate in continuous motion about a central axis (L) and comprises a plurality of test devices (5), each of which comprises: a movable bell (53) adapted to directly engage a carrier (3) so as to form a chamber (67) which houses said container (C); an opening (38) which is in fluid communication with the inside of said carrier (3), a vacuum generating mechanism (54) and a detection mechanism (55); a tracer gas injection mechanism (59) inside said bell (53) adapted to engage, in a gas-tight manner, a feed inlet (30) of a container (C) in the chamber (67).

Detects gas leakage of the test specimen accurately in a short time. A method for detecting gas leakage of a test specimen (W) comprises the steps of: sealing the test specimen (W) into the internal space (IS2) of a chamber (CH); introducing a first gas into the internal space (IS1) of the test specimen (W) to raise the pressure in the internal space (IS1) of the test specimen (W) higher than the pressure in the internal space (IS2) of the chamber (CH); vacuuming the internal space (IS1) of the test specimen (W); introducing a second gas into the internal space (IS2) of the chamber (CH); and performing a second leakage test to detect gas leakage of the test specimen (W) by detecting the second gas that has flowed from the internal space (IS2) of the chamber (CH) into the internal space (IS1) of the test specimen (W).

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.

The present invention provides a fluid component body having a leak test passage. [Solution] To test for leaks passing through each valve body seal of the manifold valve assembly 610, in an exemplary manner, the manifold assembly is installed in a fluid system under vacuum and connected to a leak detection device (e.g., a mass spectrometer), and a test fluid (e.g., a tracer gas such as helium or hydrogen) is sequentially supplied to each of the leak test ports 663a, 663b, and the leak detection device is used to measure the ingress of the test fluid into the valve cavities 612a, 612b that have passed through the body seal (e.g., due to discontinuities or contaminants in the bead section or outer seal surfaces 625a, 625b) to identify leaks in the body seal.

Provided is an automatic vapor generating machine for leak size estimation in a fluid system of a vehicle. The machine is configured for connecting to a source of pressurized gas. The machine generates vapor by heating a liquid in a vapor generating chamber that is thereafter conveyed into the fluid system. A controller controls the operation of the machine, including controlling an electrically controllable valve, a flow sensor, a pressure sensor, a heating switch and a display that is mounted on the machine. The controller has a processor and a memory that are programmed to execute instructions to run multiple leak test programs, collect and process data from the sensors, estimate leak sizes in the fluid system and display graphical representations of the test results on the display. The graphical representation allows the operator to analyze graphs and other data displayed on the display. A method therefor is also disclosed.

A memory sub-system causing execution of a first wordline leakage test of a first wordline group of a set of wordline groups of a memory block in response to determining a temperature of the memory block is within a threshold temperature range. A first result of the first wordline leakage test is determined. A second wordline leakage test of a second wordline group is caused to be executed and a second result is determined. A determination is made that the first result of the first wordline leakage test of the first wordline group satisfies a first condition. A determination is made that the second result of the second wordline leakage test of the second wordline group satisfies a second condition. In response to satisfaction of the conditions, an action is executed.

This application discloses an automatic leak testing method for an electrolytic cell, comprising: in response to a first command, automatically opening a first control valve on the connection line from the cathode gas phase outlet of the electrolytic cell to the hydrogen venting main, a second control valve on the connection line from the anode gas phase outlet of the electrolytic cell to the chlorine absorption main, and overflow control valves at the anode and cathode ends of the electrolytic cell; sending a drive command to the drive mechanism of the hydraulic cylinder of the electrolytic cell, thereby driving the hydraulic cylinder of the electrolytic cell to maintain the compression pressure of the hydraulic cylinder at 6.5 MPa, and adjusting the locking nut of the electrolytic cell to a released state via the drive mechanism; in response to a second command, opening the cathode liquid inlet control valve of the electrolytic cell to first inject cathode liquid into the electrolytic cell, and then, when the pressure difference between the cathode and anode reaches a first range, opening the anolyte inlet control valve of the electrolytic cell to inject anolyte into the electrolytic cell. This application improves the leak detection efficiency.

A nitrogen compression system for a leakage test on a gas pipeline used for an engine according to the present invention includes: a nitrogen generator which is installed on a hull and generates nitrogen; a nitrogen storage tank which stores the nitrogen generated from the nitrogen generator; an air compressor which generates compressed air used to support starting of an engine for propelling the hull and supplies the compressed air to the engine; an air supplier which supplies air to the air compressor; and a first diverter valve which is installed on a first diverter pipeline connecting the air supplier, the nitrogen storage tank, and the air compressor and is controlled to supply any one of air and nitrogen to the air compressor. When the first diverter valve is controlled to supply nitrogen to the air compressor, compressed nitrogen compressed by the air compressor is used to purge a gas pipeline connected to the engine.