68 results about "Helium mass spectrometer" patented technology

The invention discloses a helium detection device and method for the airtightness of a bonding interface and a bonding microcavity, and belongs to the field of the airtightness of MEMS devices. The device comprises a sample holder, a mass spectrometer, a molecular pump, a mechanical pump and other components, helium is used as detection gas, and the helium is leaked only through a bonding interface through a customized and processed test sample and sample holder structure, so that the interference of other leaks in a non-bonding area on a test result is avoided. The testing method comprises the steps of sample introduction, vacuum pumping, helium filling, signal detection, dynamic and steady state testing and the like, the helium leak rate is monitored in real time by combining with a helium mass spectrometer, and the minimum leak detection rate is that high-sensitivity air tightness detection is ensured. According to the method, the airtightness of the bonding interface can be independently evaluated, and a reliable basis is provided for development of a novel bonding process. The method is suitable for air tightness detection and evaluation of the bonding process in MEMS device processing and manufacturing.

The invention discloses a leak detector leak rate prediction method based on function fitting and correlation analysis, and relates to the technical field of helium mass spectrometer leak detector detection.The leak detector leak rate prediction method comprises the steps that a leak rate and time associated sequence corresponding to a leak hole is collected, function fitting processing is conducted on the leak rate and time associated sequence, and a leak rate attenuation feature model is obtained; then a real-time data fitting model corresponding to the leak hole is collected, correlation analysis is carried out on the real-time data fitting model and the corresponding leak rate attenuation feature model, and a correlation analysis result is determined; and finally, on the basis of the correlation analysis result, the leak rate of the leak hole is predicted, a leak rate prediction result is determined, the judgment time can be greatly shortened in any leak rate range, and the leak detection efficiency is greatly improved.

The invention relates to the field of metal corrugated pipe leakage detection, and discloses a fixing device for metal corrugated pipe leakage detection and a helium mass spectrum leakage detection system, and the fixing device comprises a first device body and a second device body which are opposite to each other in a first direction and are arranged in a spaced manner to form an assembly space, a first communication hole is formed in at least one of the first device body and the second device body; the adjusting mechanism is used for adjusting the spacing distance between the first device body and the second device body in the first direction so as to change the size of the assembly space in the first direction. Therefore, through cooperation of the first device body, the second device body and the adjusting mechanism, the size of the assembling space in the first direction can be changed, metal corrugated pipes of different length sizes can be assembled in the assembling space, and therefore the universality of the fixing device can be improved, and the fixing device is simple in structure and convenient to use. And the assembly efficiency of the fixing device is improved, so that the leak detection efficiency of the metal corrugated pipe is improved.

The invention belongs to the technical field of cementing technologies and adhesives, and discloses a low-stress cementing sealing structure of a spherical zinc sulfide window, which is used for realizing butt joint of an aluminum alloy outer cover (2) and the spherical zinc sulfide window (1), and cementing sealing of the lower part of the outer wall of the spherical zinc sulfide window (1) and the upper part of the inner wall of the aluminum alloy outer cover (2). After the sealing assembly is used for sealing the zinc sulfide window, the overall leakage rate of the window (the sealing assembly is placed in a metal sealing container, a standard leakage opening is formed in the container, and the leakage rate is tested at the leakage opening through a helium mass spectrometer) is reduced to 10 <-8 > Pam < 3 > / s from 10 <-7 > Pam < 3 > / s sealed through traditional silicon rubber, the order of magnitude is reduced, and the sealing qualification rate is increased to 98% or above from 80%; compared with traditional epoxy resin sealing, the risk that the window deforms and even cracks is greatly avoided.

The invention relates to the technical field of heat exchanger sealing performance detection, in particular to a heat exchanger sealing performance detection device, which is matched with a helium mass spectrometer leak detector to detect the tube pass sealing performance of a tube type heat exchanger, and comprises a rectangular frame and positioning wheels arranged at four corners of the rectangular frame, two detection mechanisms which are distributed up and down are arranged on the rectangular frame, each detection mechanism comprises a transverse sliding rail, a longitudinal sliding rail and a detection assembly, each detection assembly comprises a first suction gun which swings in a reciprocating mode and a second suction gun which moves along with the first suction gun, the tail end of each first suction gun points to the outer surface of the end of the tube bundle, and each second suction gun elastically moves front and back and extends into the tube bundle. The two suction guns are used for capturing helium in the annular welding position of the heat transfer tube and the tube plate and the interior of the heat transfer tube, so that leakage detection is carried out, detection errors caused by detection distance changes due to the fact that the suction guns are manually held by hands are reduced, and the efficiency of carrying out sealing performance detection on the large tubular heat exchanger is improved.

The invention relates to the technical field of vehicle-mounted liquid hydrogen cylinder detection, and discloses a vehicle-mounted liquid hydrogen cylinder vibration test method, which comprises the following steps: filling a gas cylinder with hollow glass beads of which the density is close to that of liquid hydrogen; the helium is cooled through a helium refrigerating device, and the helium is continuously introduced into the gas storage bottle, so that the temperature of the hollow glass beads is consistent with the temperature of the liquid hydrogen; sleeving a helium cover on the gas storage bottle, and vacuumizing the inside of the helium cover; formulating a vibration loading scheme according to the actual driving condition of the vehicle; in the vibration loading process, the concentration of helium in the helium cover is monitored in real time through a helium mass spectrometer leak detector, and if helium leakage is detected, the test is stopped; after vibration loading is finished, a helium mass spectrometer leak detector is used for detecting whether leakage occurs at the joints of the valve, the pipeline joint, the inner container and the shell of the gas storage cylinder or not; the heat insulation performance of the gas storage cylinder is judged; the structural integrity of the gas storage cylinder is detected through visual inspection and an ultrasonic detector; according to the method, liquid hydrogen working conditions are accurately simulated, test safety is guaranteed, and test efficiency is improved.

The invention discloses a molten salt check valve helium leak detection device and method, and belongs to the technical field of molten salt check valves. The problems that in the prior art, leakage rate detection is inaccurate, and the leakage position is difficult to find are solved. According to the technical scheme, a helium source is sequentially connected with a first pressure gauge and a spray gun, the left side of a fused salt check valve is connected with a helium mass spectrometer leak detector and an auxiliary vacuum pump, and the right side of the fused salt check valve is sequentially connected with a second pressure gauge, a second electric stop valve, a second quick cut-off valve and a second release valve; and a calibration leak hole is formed in the fused salt check valve. According to different use conditions, a proper detection method can be selected to determine the leakage amount of a leakage point, and if a vacuum leakage detection test exceeds the standard, the method is continued to find out the position of the leakage point, so that repair is facilitated; detection cost is low, and equipment is simple; detection results are visual, and leakage positions are easy to judge.

The present application relates to a kind of detection systems for detecting the leak of the inner tube of vacuum insulated pipeline of test station, including the vacuum insulated pipeline for transmitting the low-temperature liquid generated by cryogenic refrigerator to distribution valve box, the vacuum insulated pipeline is connected with at least one helium mass spectrometer leak detector;Wherein, the vacuum insulated pipeline is welded by several prefabricated sections through corresponding transition section, each prefabricated section includes internal pipeline, external pipeline and vacuum interlayer between internal pipeline and external pipeline, vacuum safety plug is arranged on the external pipeline of each prefabricated section, and at least one prefabricated section is connected with an auxiliary evacuation system.The present application also relates to a kind of detection method for detecting the leak of the inner tube of vacuum insulated pipeline of test station.The present application realizes the detection of the inner tube of vacuum insulated pipeline section by section, can accurately and quickly determine the inner tube with leak, and quickly and accurately locate the leak range, improve detection efficiency and detection accuracy.

The invention provides a connector flange leak rate rapid detection device and method. The connector flange leak rate rapid detection device comprises a helium tank, a pressure reducing valve, a spray gun, a passive standard leak hole, a stop valve, a connector, a connector flange, a flange overall leak detection tool, a vacuum corrugated pipe and a helium mass spectrometer leak detector. A cavity is formed in the flange integral leakage detection tool, and a flange interface is formed on the edge of the top of the upward opening; a connector flange to be detected is placed above a flange interface of the flange integral leak detection tool and is in sealed connection with the flange interface, and a connector is inserted into the connector flange to be detected. The helium mass spectrometer leak detector is connected to the interior of the flange integral leak detection tool through a vacuum corrugated pipe; the passive standard leak hole is connected to the interior of the flange integral leak detection tool through a stop valve. The spray gun is connected to the helium tank through the pressure reducing valve, and a nozzle of the spray gun faces the connector. According to the invention, the overall leakage rate of the connector flange can be rapidly detected, the leakage point of the connector flange can be rapidly positioned, and the workload of the leakage rate detection of the connector flange can be reduced.

The invention discloses an air tightness detection device for a corrugated pipe compensator. The air tightness detection device comprises a first blind flange, a second blind flange, a fastening assembly, a sealing assembly, an air exhaust connecting pipe, vacuumizing equipment, a vacuum gauge, a vacuum baffle valve, a helium mass spectrometer leak detector and an external helium spray gun. The invention also discloses a bellows compensator air tightness detection method. The method comprises the following steps: S1, assembling and sealing; s2, performing initial inspection; s3, vacuumizing is carried out; s4, maintaining pressure and observing; and S5, judging a result. The technical scheme of combining negative pressure vacuum and helium mass spectrum leak detection is adopted, the characteristics that helium molecules are small in diameter, low in background content and high in response speed are utilized, the leak detection sensitivity is extremely high and is far superior to a traditional bubble method, a negative pressure maintaining method and an SFsniffing method, high-precision detection can be stably achieved, and the leak detection accuracy is greatly improved. The device can meet the requirements of extra-high-voltage GIL pipelines, chemical high-risk medium pipelines and other scenes with extremely high requirements for sealing performance, and the reliability and accuracy of detection results are greatly improved.

This utility model relates to the field of leak detection technology for ceramic orifice plate heater assemblies, and discloses a tooling for leak detection of ceramic orifice plate heater assemblies, including a leak detection tooling base and a leak detection tooling cover. The upper end of the leak detection tooling base is provided with an annular sealing structure that seals with the bottom of the ceramic orifice plate heater assembly, and the lower end is provided with an interface adapted to a helium mass spectrometer leak detector. The leak detection tooling cover is provided with a conical sealing structure that matches the shape of the outer wall of the metal gas cone of the ceramic orifice plate heater assembly, and the top of the leak detection tooling cover is provided with a narrow-hole sealing structure. The annular sealing structure is a first annular groove, and the conical sealing structure is a second annular groove. The upper end of the leak detection tooling base is also provided with two symmetrically distributed positioning holes, the center distance of which is the same as the mounting hole distance of the metal rivets at the bottom of the ceramic orifice plate heater assembly. This utility model has a simple structure, good sealing performance, and can effectively detect the airtightness of ceramic orifice plate heater assemblies.

The invention discloses a double-backing-pump helium mass spectrometer leak detector with switchable gas extraction modes, and belongs to the field of helium mass spectrometer leak detectors, the double-backing-pump helium mass spectrometer leak detector comprises a detection box, the top surface end of the detection box is provided with a leak detection port, the detection box is internally provided with a gas extraction system, and the gas extraction system comprises a first backing pump and a second backing pump which are arranged in the detection box. A first pipeline is connected to an extraction opening of the first backing pump, the end, away from the first backing pump, of the first pipeline is inserted and fixed to the bottom end of the leakage detection opening, a second pipeline is connected to an extraction opening of the second backing pump, the end, away from the second backing pump, of the second pipeline is fixed to the peripheral face of the first pipeline, and a third pipeline is connected to an air outlet of the first backing pump. The end, away from the first backing pump, of the third pipeline is fixed to the peripheral face of the second pipeline, a first electromagnetic valve is arranged on the third pipeline, a second electromagnetic valve is arranged on the second pipeline, an exhaust pipe is fixed to the peripheral face of the third pipeline, and a third electromagnetic valve is arranged on the exhaust pipe. The helium mass spectrometer leak detector has the effects of reducing the pollution of the cavity of the helium mass spectrometer leak detector and improving the vacuum degree and the sensitivity of the mass spectrometer detection chamber.

1. The name of the design product: helium mass spectrometer leak detector. 2. The use of the design product: for sealed objects, leak point positioning and quantitative detection instrument. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective drawing.

The application provides a sealing detection method of an ultrahigh vacuum exhaust device, relates to the technical field of sealing detection, and comprises the following steps: performing leakage risk feature mining on the ultrahigh vacuum exhaust device, and constructing a detection point distribution; performing vacuum pumping smooth detection on the ultrahigh vacuum exhaust device, and generating a sealing detection starting signal according to a smooth detection result; performing sealing detection on the ultrahigh vacuum exhaust device according to the detection point distribution and a helium mass spectrometer leak detector, and obtaining a first device sealing detection result; and performing detection background interference correction, helium injection cross-influence compensation and material helium adsorption correction on the first device sealing detection result, and generating a fourth device sealing detection result. The application solves the technical problem that, due to the existence of various interference factors, misjudgment and omission are prone to occur, and the sealing detection precision is insufficient, the detection is performed after vacuum smoothing, the detection result is corrected, and the sealing detection effect of the ultrahigh vacuum exhaust device is improved.

This invention discloses a helium leak detection system and method for supercapacitors. The system includes a sealed leak detection chamber, a vacuum pumping unit, a helium supply and recovery unit, and a helium mass spectrometer leak detector. The hollow sealed leak detection chamber is used to hold the capacitor to be tested. The sealed leak detection chamber is connected to the vacuum pumping unit, the helium supply and recovery unit, and the helium mass spectrometer leak detector. The vacuum pumping unit is used to perform a vacuum pumping operation inside the sealed leak detection chamber. The helium supply and recovery unit is used to fill the sealed leak detection chamber with a mixture of helium and nitrogen gas, and to recover and store the helium in the mixture. The helium mass spectrometer leak detector is used to detect the change in helium concentration in the sealed leak detection chamber in real time and convert the detected helium concentration signal into leak rate data. This invention is scientifically designed, has high detection accuracy, and can accurately detect the sealing performance of capacitors, determine whether there is a leakage problem, improve detection efficiency, and reduce detection costs.

The application discloses a helium mass spectrum leak rate determination method fusing confidence quantification and finite state machine control and relates to the technical field of vacuum leak detection. The method comprises the following steps: S1, obtaining multi-dimensional features from a leak signal subjected to multi-frequency band filtering processing; S2, if a baseline signal and environmental interference features collected in the absence of helium gas meet corresponding preset conditions, respectively, determining a preset threshold value as an initial dynamic threshold value; S3, determining the weight of each feature in the multi-dimensional features by using an analytic hierarchy process and calculating the sub-confidence of each feature in the multi-dimensional features; S4, calculating the comprehensive confidence of the multi-dimensional features, and if the comprehensive confidence is not lower than a preset value, determining the helium mass spectrum leak rate by using the leak signal and the initial dynamic threshold value; and S5, dynamically updating the initial dynamic threshold value based on the comprehensive confidence, and repeatedly executing steps S1-S5 to continuously determine the helium mass spectrum leak rate. The method improves the determination reliability, the weak leak signal capturing capacity and the like.

The invention relates to the technical field of leak detection tools, in particular to a helium mass spectrometer leak detection tool for a pneumatic sealing connector, which comprises a base, a gas extraction channel, a pressure sensor, a pressure sensor and a pressure sensor, the base is provided with an accommodating groove, and one end of the gas extraction channel is communicated with the bottom wall of the accommodating groove; the supporting plate is connected with the base, and a pressing air cylinder is installed on the supporting plate; the sealing block is connected with a piston rod of the pressing air cylinder, an air supply channel is formed in the sealing block, one end of the air supply channel is connected with a helium input unit, and after the sealing block abuts against the base, an inner cavity of the containing groove communicates with the air supply channel; the gas extraction detection unit is connected with the base and is used for extracting gas in the gas extraction channel and detecting helium flowing into the gas extraction channel; according to the invention, the effect of reducing the detection error on the premise of improving the leakage detection efficiency of the connector is achieved.

This invention relates to the field of CFRP leakage detection technology, specifically to an in-situ CFRP leakage rate testing system under extreme thermo-coupling environments. The system comprises an extreme temperature environment simulation and mechanical loading subsystem, consisting of an environmental chamber and a mechanical loading unit; an in-situ helium mass spectrometry leakage detection subsystem, used to construct an independent helium chamber on one side of the sample; a molecular pump and a backing pump connected via stainless steel tubing on the other side of the sample; leakage detection using a helium mass spectrometer leak detector; and a multi-channel synchronous data acquisition and control subsystem, used for unified triggering of acquisition channels and software time correction; and for controlling environmental temperature, strain loading, real-time acquisition of leakage signals, and unified timeline display of multi-channel data. This invention improves the realism of environmental simulation, the continuity of detection, and the integrity of data correlation in CFRP leakage detection.

The invention relates to the related technical field of airtightness detection, in particular to a new energy automobile battery box body vacuum adsorption airtightness detection device which comprises a detection box body, a detection frame installed at the top of the detection box body, a battery box shell and a helium mass spectrometer leak detector. A detection plate arranged in the surrounding detection assembly reciprocates at the center of the top of the battery box shell, and a swing detection assembly is arranged at the position, at the sealing position of an upper cover and a lower cover of the battery box shell, of the interior of the detection frame. It is ensured that the fixed helium spraying gun always keeps the optimal constant distance from the top contour of the battery box shell, waveform swing can effectively cover the corner and the curved surface area of the battery box cover, efficient full-coverage detection of a complex sealing surface is achieved, the helium concentration coverage of the periphery of the battery box shell is uniform and stable by shifting an arc-shaped spiral blade in the scattering assembly, and the detection effect is improved.

This invention provides a fiber optic sealing joint leak detection device and its usage method. The device includes a helium mass spectrometer leak detector, a leak detection fixture bracket, and a helium spray gun. The leak detection fixture bracket has a leak detector connection end and a sealing joint mounting end. The leak detector connection end is connected to the gas inlet end of the helium mass spectrometer leak detector, and the sealing joint mounting end is configured to mate with the nozzle of the helium spray gun. The leak detector connection end has a first through hole extending into the leak detection fixture bracket, and the sealing joint mounting end has a second through hole extending into the leak detection fixture bracket. The first and second through holes are interconnected. The sealing joint mounting end has a sealing ring and a locking cap. The sealing ring has a sealing joint mounting hole for mounting the fiber optic sealing joint, and the locking cap has a gas inlet. The second through hole, the sealing joint mounting hole, and the gas inlet are sequentially arranged opposite each other. The locking cap is detachably mounted on the sealing joint mounting end. This method is applied to the device. This invention has a simple structure and can improve the detection efficiency of fiber optic sealing joints.

The invention discloses a method and a system for deducting a hydrogen background of a helium mass spectrometer leak detector, and belongs to the technical field of helium mass spectrometer leak detectors. The positive and negative bias voltages are applied to the original acceleration voltage, so that the maximum value and the minimum value of the hydrogen ion signal are obtained, and the background value of the hydrogen ion signal at the peak value of the helium ion signal when the bias voltage is not applied can be estimated through the maximum value and the minimum value of the hydrogen ion signal. And the total ion signal is deducted from the total ion signal when the bias voltage is not applied, so that the detection result of the helium ion signal is more accurate.

The present application relates to the technical field of leakage detection, and discloses a positive pressure suction gun leakage rate detection method, device, equipment, medium and product, comprising: obtaining a measured positive pressure standard leakage rate obtained by detecting a positive pressure standard leak hole by a helium mass spectrometer leak detector and a background leakage rate obtained by detecting ambient air; determining a correction coefficient of the helium mass spectrometer leak detector according to the measured positive pressure standard leakage rate, the background leakage rate and a standard leakage rate of the positive pressure standard leak hole; obtaining a measured leakage rate of a system to be detected, which is obtained by detecting the leakage rate of the system to be detected by the helium mass spectrometer leak detector; and calibrating the measured leakage rate by using the correction coefficient and the background leakage rate to obtain a calibrated leakage rate of the system to be detected. The present application obtains the correction coefficient of the helium mass spectrometer leak detector by obtaining the measured positive pressure standard leakage rate and the background leakage rate, and calibrates the measurement value of the system to be detected by the helium mass spectrometer leak detector according to the correction coefficient, so that the calibrated leakage rate of the system to be detected with quantitative judgment value is obtained.

The invention discloses a test device for a radial carbon ring sealing element, and belongs to the technical field of carbon ring sealing elements, the test device for the radial carbon ring sealing element comprises a helium mass spectrometer leak detector and a sealing cavity, the top of the helium mass spectrometer leak detector is provided with a leak detection opening, the sealing cavity is divided into a sealing tank and a sealing cover, the sealing cover is buckled on the sealing tank, and the leak detection opening is formed in the top of the helium mass spectrometer leak detector. A connecting port is formed in the bottom of the sealing tank, the connecting port is communicated with the leak detection port, and hoops are arranged outside the connecting port and the leak detection port; a servo motor is arranged above the sealing cover, and an adjusting indication mechanism used for adjusting the position of the servo motor is arranged on the side wall of the servo motor. According to the invention, the test mechanism capable of clamping and rotating the radial carbon ring sealing element is arranged in the sealing tank, and the adjustment indication mechanism which is convenient for a worker to master the opening degree of the test mechanism is arranged, so that the worker can better test the radial carbon ring sealing elements with different sizes; and the sealing performance is tested under the condition of simulating a working scene.

The invention relates to the technical field of sealing gasket testing, and discloses a sealing element leakage rate testing system based on helium mass spectrometry, which comprises a rack, a transmission part, a fixing part, a helium mass spectrometer leak detector, an exhaust pipe and a push rod, and is characterized in that the transmission part is arranged on the rack; the fixing part is detachably arranged on the rack; an air exhaust channel and a lateral flow guide passage which are communicated with each other are formed on the fixed part; a helium chamber is formed on the rack around the fixed part, and the helium chamber is communicated with the lateral flow guide passage; the helium mass spectrometer leak detector is in butt joint with the air exhaust channel through an air exhaust pipe. The push rod is movably mounted in the air exhaust channel; one end of the push rod is used for placing a to-be-tested sealing element, and the other end is connected with the transmission part; the transmission part drives the push rod to move; the push rod is used for pushing the sealing element to abut against the side wall of the air exhaust channel so as to cut off the air exhaust channel and the lateral flow guide path. The transmission part is used for providing pushing force, various sealing elements can be assembled on the push rod for testing, and various working requirements are met.

The invention belongs to the technical field of vacuum plug helium detection, and particularly relates to a helium detection method and device for a vehicle-mounted LNG cylinder vacuum plug and a manufacturing method of the vehicle-mounted LNG cylinder vacuum plug. The helium detection method comprises the steps that all test holes of a sealed container are sealed through the vacuum plug, and a vacuumizing hole of the sealed container is connected with a helium mass spectrometer leak detector; the helium mass spectrometer leak detector vacuumizes the sealed container; helium is sprayed to the position, sealed through the vacuum plug, of the sealed container through a spray gun; and performing helium detection on the interior of the sealed container by using a helium mass spectrometer leak detector. The helium detection efficiency of the vacuum plug is improved, the helium detection period is shortened, and the sealing reliability of the vacuum plug is guaranteed.

The present application relates to the field of cryogenic pump leak detection, and discloses a cryogenic pump helium mass spectrometric leak detection device and a cryogenic pump leak detection method, the cryogenic pump helium mass spectrometric leak detection device comprising: a leak detection cabin, a vacuum pumping assembly, a helium detection assembly, a first vacuum degree detection piece, a cryogenic pump body detection assembly, a helium filling assembly, a helium concentration detection piece, a first calibration assembly, and a second calibration assembly, the vacuum pumping assembly comprising a first pipeline, a first valve, a second valve, a first vacuum pump, and a second vacuum pump; the helium detection assembly comprising a second pipeline, a third valve, and a helium mass spectrometric leak detector; the cryogenic pump body detection assembly comprising a third pipeline, a second vacuum degree detection piece, a fourth pipeline, and a fourth valve; and the helium filling assembly comprising a fifth pipeline, a helium storage piece, and a fifth valve.The cryogenic pump helium mass spectrometric leak detection device can simultaneously complete leak detection of the refrigerator and the cryogenic pump body in one operation, thereby improving leak detection efficiency.

This invention relates to an open-type circuit shell helium mass spectrometry leak detection test fixture, belonging to the field of microelectronics testing technology. It includes a fixture body with a positioning groove for a clearance-fitted circuit shell, the bottom of which serves as a supporting plane for the shell. A pressure cap is detachably connected to the plane of the positioning groove opening. A sealing gasket is positioned between the pressure cap and the positioning groove opening. Under the pressure of the pressure cap, the inner edge of the gasket deforms and elastically compresses against the outer peripheral wall of the circuit shell, forming an airtight connection. The gasket is positioned higher than the welding area of ​​the circuit shell, and the gasket, the outer wall of the circuit shell, and the positioning groove form an airtight space. The fixture body also has a gas contact detection hole, which communicates with the airtight space through a gas guide path. This invention effectively solves problems such as insufficient appearance protection, low disassembly and assembly efficiency, poor adaptability, and potential cleanliness issues.

This invention discloses a performance testing method and cooling method for a closed-loop liquid cooler, belonging to the technical field of closed-loop liquid coolers, and aims to solve the problems in the prior art. The method includes: activating a leak-detecting vacuum pump to evacuate the container tank and liquid cooling pipeline; activating a helium tank to supply helium gas into the liquid cooling pipeline; activating a helium mass spectrometer leak detector to detect the helium content in the container tank; activating a working fluid temperature control tank, supplying the cooling working fluid from the working fluid temperature control tank into the liquid cooling pipeline; using a pre-pressure gauge to detect the pre-pressure before the liquid cooling pipeline and a post-pressure gauge to detect the post-pressure after the liquid cooling pipeline; the difference between the pre-pressure and post-pressure is the flow resistance of the closed-loop liquid cooler. This invention can be used for the filling and draining of closed-loop liquid coolers.

The application provides a kind of thrust device air-tightness automatic detection equipment, including at least a set of air-tightness tool assembly and helium mass spectrometer;Air-tightness tool assembly is used to position, throat plugging, electromagnetic valve energization after plugging completion, thrust device inflation, pressure maintaining, and the gas around thrust device is extracted and supplied to helium mass spectrometer;Helium mass spectrometer is arranged in air-tightness platform assembly, and according to the gas supplied by air-tightness tool assembly, the helium leakage amount in thrust device air-tightness detection is accurately measured.The automatic detection equipment of the application can automatically and accurately detect the air-tightness sealing condition of the electromagnetic valve and the thrust chamber assembly joint surface in the thrust device, and the detection result is accurate and reliable.

The application relates to a filament fault diagnosis system for a helium mass spectrometry air tightness detection device, which comprises an ionization chamber arranged in a vacuum environment and a detector in communication with the ionization chamber, the ionization chamber comprises a filament and a permanent magnet, the filament generates electrons through electric current and is arranged in a magnetic field of the permanent magnet, the permanent magnet collides the electrons and combined molecules to form charged ions, the detector converts the charged ions into an electric signal, the system further comprises a gas analysis module and a signal analysis module, the gas analysis module is close to the filament and is used for detecting the metal vapor concentration released by the filament in real time, the signal analysis module is electrically connected with the detector and is used for monitoring the fluctuation of the electric signal in real time, when the metal vapor concentration released by the filament exceeds a preset first threshold value and the fluctuation of the electric signal exceeds a preset second threshold value, the system automatically diagnoses that the filament has a fault and reminds an operator, so that the fault source of the air tightness detection device, i.e. filament aging, can be found and diagnosed in time.