354 results about "Leak detector" patented technology

The invention provides a vacuum helium mass spectrum leak detection method and device for corrugated pipe products. The vacuum helium mass spectrum leak detection method comprises the following steps that S1, corrugated pipes are fixed through supporting rings; s2, the supporting ring and the supporting plate are assembled; s3, a first O-shaped ring is placed between the corrugated pipe and the upper cover for sealing, and the upper cover, the corrugated pipe and the supporting plate are fixed through studs; s4, the fixed corrugated pipe is placed on a base, a second O-shaped ring is placed between the base and an upper cover for sealing, and bolts are adopted for fixing; s5, the assembled corrugated pipe is vertically placed, a helium mass spectrometer leak detector is connected with a sampling inspection opening in the bottom, and the outside of the corrugated pipe is vacuumized; and S6, connecting the helium tank connected with the pressure reducing valve with a top helium filling port, and filling helium into the corrugated pipe for leak rate inspection. According to the invention, the corrugated pipe is ensured not to be stretched under the stamping condition and not to be distorted and deformed; the effectiveness of sealing between the corrugated pipe and the upper cover is ensured; the detection result is accurate and reliable.

Described herein are devices, systems, methods, and processes for enhancing the fault tolerance and efficiency of open loop liquid cooling systems in high-powered computing environments. A leak detector is integrated, which, upon detecting a leak, may signal the baseboard management controller to shut down the coolant flow in the affected section by closing corresponding solenoid valves, preventing a complete system shutdown. The solenoid valves and the leak detector may be part of an on-board cooling system within the server chassis, providing localized control and fault tolerance. Additionally, the system can utilize the solenoid valves to control the coolant flow rate based on the thermal load of the device, optimizing energy usage, and potentially allowing for a higher number of devices within a rack. The embodiments may offer a more resilient and energy-efficient liquid cooling system for devices including high-powered components.

The invention discloses a leak detector data acquisition and transmission system and method, and the method comprises the steps: actively collecting on-site original sound waves through an ultrasonic microphone, and carrying out the processing of the original sound waves, so as to generate a specific noise fingerprint of a current environment, thereby depicting the spectrum distribution and intensity characteristics of background noise; targeted noise reduction is carried out on subsequently collected sound waves on the basis, so that a real leakage signal is accurately stripped from strong interference. On this basis, the terminal device performs local real-time reasoning by using the extracted high-quality feature vector so as to quickly identify potential leakage. Finally, in response to a leakage event which is locally judged to be high in confidence, the original sound wave data stream without information loss is transmitted to the cloud. Through accurate noise fingerprint noise reduction, the detection sensitivity and accuracy of the leak detector on early weak leakage signals in a complex industrial environment are greatly improved, and false alarm and missing alarm caused by environmental noise and transient interference are effectively avoided.

The invention provides noise-based tap water pipe network leak detection equipment, and relates to the technical field of water pipe network detection. The noise-based tap water pipe network leak detection equipment comprises a shell, an upper flange, a lower flange, an edge calculation module, a communication module and a mass block. According to the invention, the environmental noise monitoring unit and the high-frequency signal acquisition unit are cooperatively deployed, and the wavelet packet decomposition algorithm is operated in real time by adopting edge calculation, so that the problem that a traditional single-point sensor cannot distinguish pipeline vibration, water flow turbulence and leakage signal spectrum characteristic difference is effectively solved, and the leakage characteristic identification accuracy is relatively improved by more than 20%; through the synergistic effect of the laser micro-woven annular groove, the liquid metal sealing structure and the composite elastic sealing structure, the problem of signal distortion caused by sealing failure of an existing leak detection instrument in a humid and corrosive underground environment is solved, and it is ensured that equipment can maintain stable high-frequency vibration signal acquisition capacity for a long time under severe working conditions.

The invention relates to the technical field of fuel cell membrane electrode testing, and discloses a fuel cell membrane electrode airtightness testing system and method, and the system comprises a tool clamp which comprises a cavity and a clamping assembly, the cavity is in a shell shape, and the top of the cavity is open; the clamping assembly is used for clamping a sample membrane electrode and sealing and fixing the sample membrane electrode at the top opening of the chamber; the gas supply mechanism is used for supplying helium to the inner cavity of the chamber, enabling the inner side pressure of the sample membrane electrode to be higher than the outer side pressure and forming a stable pressure difference; and the detection mechanism comprises a helium leak detector and a mechanical arm, and the mechanical arm grabs the helium leak detector to carry out global detection and smelling on the outward surface of the sample membrane electrode to find leakage points and records the leakage rate of each leakage point. According to the air tightness test system and the test method, whether the membrane electrode leaks or not can be conveniently and efficiently judged, the position of a leakage point is positioned, and the area of the leakage point is estimated.

Described herein are devices, systems, methods, and processes for enhancing the fault tolerance and efficiency of open loop liquid cooling systems in high-powered computing environments. A leak detector is integrated, which, upon detecting a leak, may signal the baseboard management controller to shut down the coolant flow in the affected section by closing corresponding solenoid valves, preventing a complete system shutdown. The solenoid valves and the leak detector may be part of an on-board cooling system within the server chassis, providing localized control and fault tolerance. Additionally, the system can utilize the solenoid valves to control the coolant flow rate based on the thermal load of the device, optimizing energy usage, and potentially allowing for a higher number of devices within a rack. The embodiments may offer a more resilient and energy-efficient liquid cooling system for devices including high-powered components.

A leak detector includes a gas sensor and a purge gas supply in fluid communication with a probe head. The fluid communication has a first communication direction for the gas sensor and a second communication direction opposite to the first communication direction for the purge gas supply. The gas sensor and the purge gas supply are configured for communication through a common conduit for the fluid communication with the probe head through one or more probe head ports. Only one of the gas sensor or the purge gas supply can be in fluid communication with the probe head at a time.

The invention discloses a preparation method of a microporous positive bottle. The preparation method comprises the following steps: S1, selecting a proper microporous preparation method to prepare the microporous positive bottle; s2, after the microporous positive bottle is prepared, a leak detector is adopted to detect the profiling solid body, the standard leakage holes with different hole diameters and the microporous positive bottle with the same parameters, and then detection data between the microporous positive bottle and the profiling solid body and detection data between the microporous positive bottle and the standard leakage holes are compared; determining the final actual leakage aperture of the microporous positive bottle and judging whether the final actual leakage aperture meets the requirement or not; and S3, labeling detection data of the microporous positive bottles meeting the requirements, and packaging and storing the detection data. The preparation method of the microporous positive bottle effectively ensures that the final leakage aperture of each positive bottle for verification of leakage detection equipment can be quantified and traced, eliminates the risk of misjudgment of the performance of the leakage detection equipment caused by fuzzy aperture, and provides an accurate and reliable standard sample support for a container sealing integrity test.

The refrigerant leak detector comprises a shell, an air exhaust mechanism and a miniature single chip microcomputer are arranged in the shell, an air inlet hole is formed in one end of the shell, a butt joint pipe is fixedly arranged on the inner circumferential wall of the air inlet hole, and an exhaust hole is formed in the position, corresponding to the air exhaust mechanism, of the shell; an analysis system is arranged in the micro single chip microcomputer; the air inlet is connected with a detection device through a connecting hose, the detection device comprises a detection shell, a sensor assembly and a protection assembly for protecting the sensor assembly, the sensor assembly comprises a sensor body and a sensor signal line, and the sensor body is electrically connected with a micro single-chip microcomputer in the shell through the sensor signal line; a sensor signal line extends into the shell from the connecting hose, one end, away from the sensor assembly, of the connecting hose is fixedly connected with a connecting pipe, the connecting pipe is communicated with the connecting hose, and the connecting pipe is in threaded connection with the butt joint pipe. The application has the effects of improving the detection speed, improving the detection precision and reducing the damage of the sensor.

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 utility model relates to a gas valve sealing element airtightness detection device, which belongs to the technical field of valve airtightness detection devices and comprises a casing, a cover, a high-pressure inflation mechanism and a gas mass spectrum leak detector, a cavity is arranged inside the casing, a plug hole is arranged on the top surface of the casing, and a gas leakage hole is arranged on the bottom surface of the casing; the machine cover covers the machine shell and is provided with an air inflation hole, the machine cover is fixedly provided with an insertion column, the insertion column is inserted into the insertion hole in a matched mode, and the insertion column is provided with a vent hole communicated with the air inflation hole; an air outlet hole of the high-pressure air inflation mechanism is communicated with the air inflation hole; a gas inlet of the gas mass spectrum leak detector is communicated with the gas leakage hole. According to the utility model, the plugging column is adaptively plugged in the plugging hole to seal the contact gap between the machine cover and the machine shell, and then the peripheral side wall of the sealing ring is in sealed contact with the cavity wall of the cavity to simulate the real sealing environment of the sealing ring, so that the gas mass spectrometer leak detector can detect the amount of gas at the gas leakage hole according to the amount of gas detected by the gas mass spectrometer leak detector at the gas leakage hole. Before the gas valve is assembled, the gas tightness of the valve core and the sealing ring is detected.

The utility model discloses an air compressor convenient to maintain, and relates to the technical field of air compressor equipment. The compressed air drying device comprises an air compressor, an air storage tank and a compressed air drying machine, and one side of the compressed air drying machine is connected with a communication valve through a drying machine exhaust pipe. Due to the combination of the electromagnetic gas valves and the communication valves, the air compressor control system can flexibly control the operation state of each air compressor, when the amount of compressed air needed by production is low, part of the electromagnetic gas valves can be closed, and the corresponding air compressors can be stopped for standby application, so that unnecessary energy consumption is reduced, the production interruption time caused by maintenance is shortened, and the production efficiency is improved. Through flexible control of the electromagnetic gas valve and the communication valve, the production efficiency can be improved, the ultrasonic leak detector can detect the leakage condition of compressed gas in an air compressor system in real time, and timely leakage detection helps operators to quickly find and process the leakage problem.

The invention provides a performance test system for a low-temperature liquid one-way valve, and particularly relates to the field of low-temperature equipment. The performance test system for the low-temperature liquid one-way valve is characterized in that the outlet end of a high-pressure gas storage tank sequentially penetrates through a cold box and a test platform liquid pool; the first heat exchanger and the to-be-tested low-temperature one-way valve are sequentially connected in a liquid pool of the test platform, and finally the to-be-tested low-temperature one-way valve sequentially penetrates through the test platform and the cold box from the outlet end of the to-be-tested low-temperature one-way valve and is connected with the first exhaust treatment device, and the inlet end of the helium mass spectrometer leak detector is connected to the outlet end of the high-pressure gas storage tank. The outlet end of the helium tank is connected to the outlet end of the low-temperature one-way valve to be tested, and testing of the opening pressure difference, the closing pressure difference, the flow characteristic and the sealing performance of the one-way valve at the low temperature can be achieved.

The invention discloses a leak detector data intelligent analysis system and method, and the system carries out the time sequence mode feature extraction of a vibration signal at a first monitoring position through employing a neural network model based on deep learning, so as to excavate the time sequence implicit features of the vibration signal, and preliminarily recognizes the potential leakage abnormality based on the time sequence implicit features. For the abnormal signal, the system further obtains a vibration signal of an adjacent monitoring point, similarly, extracts a time sequence mode coding feature of the vibration signal of the adjacent monitoring point, then calculates a vibration mode space-time correlation degree between the two, and further realizes multi-dimensional verification of the leakage abnormal event through comparison between the correlation degree and a preset threshold value. Through the mode, the limitation of traditional single-point static threshold detection is broken through, the influence of environmental noise and non-leakage transient interference is effectively reduced, and the identification accuracy of the leakage signal is improved, so that the reliability of operation and maintenance decision is enhanced.

The utility model discloses a new energy automobile battery airtightness detection device, which comprises a helium mass spectrometer leak detector body, a convenient moving mechanism and a stabilizing mechanism, one side of the helium mass spectrometer leak detector body is provided with a convenient detection mechanism, the convenient detection mechanism comprises a detection channel, and one side of the detection channel is fixedly connected with a transparent detection box. A reinforcing frame is fixedly connected to the exterior of the transparent detection box, mounting plates are fixedly connected to the two sides of the reinforcing frame, and air cylinders are fixedly mounted on the lower sides of the mounting plates. According to the utility model, through the arrangement of the convenient detection mechanism, after the battery pack is filled with helium, the helium mass spectrometer leak detector body detects the leakage condition of the helium in the transparent detection box, if the battery has a leakage point, the helium can leak out, and the helium mass spectrometer leak detector body can accurately detect the leakage point and judge the airtight performance of the battery according to the detection data; the helium mass spectrum leak detection method can detect tiny leakage, and compared with a differential pressure method, the helium mass spectrum leak detection method has the advantages that the detection precision is greatly improved, and tiny leakage of the battery can be effectively detected.

The utility model discloses a leak detector multifunctional handle comprising a handle main body, one end of the handle main body is provided with a housing, an accommodation space is formed in the housing, one side of the housing far away from the handle main body is provided with an inlet and outlet communicated with the accommodation space, and the inlet and outlet is provided with a cover body. A connector is arranged on the side, close to the handle body, in the containing space, and the connector is used for being detachably connected with the cable and electrically connected with a control circuit in the handle body. According to the technical scheme, the shell is arranged at the end of the handle body, the containing space and the inlet and outlet are formed in the shell, a cable can conveniently enter the containing space to be contained, the connector is arranged in the containing space so that the cable can be communicated with a control circuit in the handle body, the cable can be taken up and paid off through the containing space, and use is convenient. Therefore, a worker can conveniently pull out a cable with a proper length from the accommodating space for use according to an actual operation state.

Methods and apparatuses are described herein. In an example embodiment, a leak detector is provided. The leak detector includes a first fitting configured to couple to an outlet of a pipe system and a fluid pressure sensor configured to generate a plurality of fluid pressure measurements corresponding to fluid pressure in the pipe system. The leak detector is configured to generate fluid pressure data based on the plurality of fluid pressure measurements, the fluid pressure data including data representing at least a steady state pressure and a dynamic state pressure; determine, based on at least the fluid pressure data, that a current fluid pressure of the pipe system satisfies at least one leak condition; detect a leak based on the at least one leak condition being satisfied; and cause an alert to be generated based on the leak being detected.

1. The name of the product of this design: Seal leakage detector with seal detection graphical user interface (AMT series). 2. Purpose of this design product: used for running programs and displaying information in sealing leakage detectors. 3. The design highlights of this appearance design product are: the graphical user interface on the screen, and the sealing leakage detector is an existing design. 4. The picture or photo that best illustrates the key points of the design: main view. 5. There are no design points, and the rear view, left view, right view, top view and bottom view are omitted. 6.Purpose of the graphical user interface: This graphical user interface is used to operate the seal leak tester and complete the main functions of the instrument, including testing, program establishment, system configuration, data query, data export and other functions. 7. Area of ​​Graphical User Interface in the product: the interface on the screen. 8. Human-computer interaction method of the graphical user interface: Touch or click the relevant function keys on the screen in the main view. 9. Description of the changing status of the graphical user interface: After setting the system, configuration program and test data in advance, touch or click the "Start" button in the upper right corner of the main view to display the interface change status diagram 1, then start testing the current program and display it; touch or click the "Stop" button in the upper right corner of the interface change status diagram 1 to display the interface change status diagram 2 to stop testing the current program.

The invention belongs to the field of sealing detection, and particularly relates to an aero-engine lubricating oil system and fuel oil system bearing cavity sealing detection method, which comprises the following steps: in a pressure maintaining stage, performing leakage detection on a detected cavity through an ultrasonic leakage detector within pressure maintaining time, and determining a leakage position; after the pressure maintaining stage is finished, recording pressure change data, comparing the pressure change data with a pressure value at the end of the pressure stabilizing time, judging whether the change value is greater than an allowable value or not, and considering that the sealing performance of the measured cavity is good; and if the pressure change data is greater than the allowable value after the pressure maintaining is finished, determining a leakage point by using an ultrasonic leakage instrument. Qualified inspection criteria are quantified through a direct pressure method airtight detection technology, the reliability of sealing inspection is improved, the sealing inspection capability of a large bearing cavity of a lubricating oil system and a fuel oil system is achieved, acoustic emission and a direct pressure method are combined, the position of a leakage source is rapidly and accurately positioned, the accuracy of leakage position judgment is improved, and the reliability of sealing inspection is improved. And meanwhile, the sealing detection efficiency is improved by more than 90%.

The present invention discloses a leak detector function test sample bottle and a method for manufacturing the sample bottle. It is not necessary to fill the entire bottle body with insulating glue to fix the resistance component, thus avoiding the insulating glue in the test sample bottle from forming a loop connected end to end during the high-voltage detection and being broken down by the high voltage, losing the original calibrated function standard. The present invention has the advantages of improving the stability of repeated use of the test sample bottle and reducing the debugging and verification cycle of the leak detector function, etc.

1. Name of the product in this design: Infrared Leak Detector. 2. Purpose of this design: For detecting refrigerant leaks. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

The invention relates to a leak detection method (100) comprising: - a learning step (101) during which at least one reference measurement signal representative of the flow or concentration of tracer gas in a reference object (A) to be tested or in an environment surrounding a reference object (A) to be tested is measured during at least one leaktightness monitoring cycle (C), - a plurality of successive test steps (102) during which a leak detector (1) is used to measure a measurement profile representative of the flow or concentration of tracer gas during at least one leaktightness monitoring cycle (C) and the measurement profile is compared against the reference profile in order, depending on the result of the comparison, to provide a similarity indicator from which the presence of an anomaly can be deduced.

The application discloses a powder metallurgy work die steel preparation uses a cover helium leak detection device, belongs to the related technical field of powder metallurgy, including fixed base and leak detector host computer, the fixed base is arranged on one side of leak detector host computer, the upper end of the fixed base is movably installed with a lifting frame, and the inside middle part position of the lifting frame is fixedly installed with a sampling gun used for docking a cover kit, the outer surface of the upper end of the fixed base is movably installed with two groups of movable clamping plates used for positioning the cover kit, the outer surface of one side of the movable clamping plate is movably installed with two groups of inclined clamping heads, the sampling gun is provided with a filter pad, and the lower end of the sampling gun is fixedly installed with a docking piece; the integrated detection structure can integrate the vacuumizing, helium injection and leak point detection links, shorten the efficiency during the cover helium leak detection operation, the quick docking structure is provided, powder suction into the leak detector host computer is avoided, and the stability is improved.

The present invention provides a high-sensitivity intelligent leak detector, which relates to the field of leak detectors. The present invention includes a leak detector main body. When the sensor is placed on the surface of an object to be detected, the present invention will drive one side of several limiting frames and the outer surface of a rubber airbag to abut against the surface of the object. Then, according to the size of the range to be detected and the actual usage, the range surrounded by the several limiting frames can be adjusted through an adjustment mechanism, which will drive the rubber airbag to be pulled apart to optimize the gathering effect and change the sound collection range. Then, while holding the sensor, the inflation mechanism can be pressed to inflate the inside of the rubber airbag, causing it to expand between the inner wall of the limiting frame and the several limiting frames, and tightly and completely covering the outer surface of the detection end of the sensor, so as to isolate the external sound, avoid interference with the detection of the leakage signal, and improve the precision and accuracy of the leakage detection.

1. Name of the Design Product: Handheld Gas Leak Detector. 2. Use of the Design Product: Non-contact handheld gas leak detector based on optical gas imaging (OGI), mainly used for the leakage detection of VOCs gases. 3. Design Key Points of the Design Product: Lies in the shape. 4. Picture or Photo that Best Illustrates the Design Key Points: Perspective view.

The present invention relates to the technical field of leak detectors, in particular to discharge leak detectors; the technical problem to be solved by the present invention is to provide a leak detector for stand-up bags with higher detection efficiency. The leak detector for stand-up bags includes an input device, an output device and a flipping device fixed on a frame, the flipping device is located between the input device and the output device, the input device, the flipping device and the output device are sequentially arranged in the conveying direction of the stand-up bag, and also includes a bottle head detection device arranged below the flipping device, the bottle head detection device includes a first discharge electrode and a first receiving electrode, the first bracket is fixedly connected to the second bracket, the first receiving electrode is fixed on the first bracket, the first discharge electrode is rotatably arranged on the second bracket, the first receiving electrode is located above the first discharge electrode, the first receiving electrode and the first discharge electrode are between the first receiving electrode and the first discharge electrode for the bottle head detection station, and the axis of the first receiving electrode is perpendicular to the rotation axis of the first discharge electrode.

The utility model relates to a multichannel leakage detector simulation device. The simulation device comprises a channel selection module, a state switching module and a plurality of leakage detector simulation units. The channel selection module comprises a plurality of selection ends, each selection end is connected with one leakage detector simulation unit, and a common end of the channel selection module is connected with one end of the state switching module. The channel selection module is used for gating one of all the leakage detector simulation units. And each leakage detector simulation unit is a simulation measurement channel. And the state switching module is used for selecting a leakage mode or a non-leakage mode for the gated leakage detector simulation unit. The leakage detector simulation unit is used for simulating and generating output signals similar to those of a leakage detector in a nuclear power unit in different working modes. According to the utility model, high-efficiency multi-channel testing can be realized through modular design, the testing efficiency is improved, the reliability is high, and the maintenance and manufacturing cost is low.

An SF6 gas leak detector with a probe protection structure comprises a leak detector body, the leak detector body is connected with a flexible feeler lever, the flexible feeler lever is provided with a probe, and the SF6 gas leak detector further comprises a probe protection assembly and a probe cleaning assembly. A protective cover is movably mounted on the outer edge of the probe; the probe protection assembly comprises a slot and a fixed bulge, and a first space taking the slot as an inner layer and a second space taking the protective cover as an outer layer are formed; the probe cleaning assembly comprises a high-pressure air pump, an air pipe and an air valve switch, the upper side of the slot is provided with a through air injection interface, and the lower side of the slot is provided with an air hole. A probe protection assembly and a probe cleaning assembly are arranged, a protective cover on the outer edge of a probe can shield airflow, the situation that the SF6 gas leakage detection result is affected by overlarge airflow is avoided, and meanwhile, due to dual protection of the protective cover and a slot, the situation that the probe is damaged by external dust and grease is better avoided; the high-pressure air pump injects compressed air into the insertion groove from the air injection connector in the upper side, air blowing cleaning is conducted on the probe, and dust is blown out from the air holes in the lower side of the insertion groove.

The utility model discloses a maintenance device for water quality and flue gas on-line monitoring equipment, and belongs to the technical field of maintenance devices. The water quality and flue gas on-line monitoring equipment maintenance device comprises a base assembly, a leak detection assembly, a damage detection mechanism and a blowing mechanism, the leak detection assembly is used for carrying out leak detection on a gas path system of the flue gas on-line monitoring equipment, and the damage detection mechanism is used for carrying out surface and internal damage detection on an optical probe of the water quality on-line monitoring equipment. The air blowing mechanism is used for conducting blow-drying maintenance and air blowing cleaning on sampling probes of the water quality online monitoring equipment and the smoke online monitoring equipment respectively, the leak detection assembly and the air blowing mechanism are installed on the two sides of the top face of the base assembly respectively, the damage detection mechanism is arranged on the top face of the leak detection assembly, and the leak detection assembly comprises an installation box. A pair of leak detector bodies is installed in the installation box body, the damage detection mechanism comprises a pair of connecting plates and a connecting frame, and a scanning electron microscope and a transmission electron microscope are installed on the two sides of the bottom end of the connecting frame respectively.

The invention relates to an airspace engine leak detection system, and belongs to the technical field of gas tightness leak detection. The helium tank extends into the leak detection box through a gas transmission pipeline and is communicated with the inner cavity of the engine; the helium filling test bench is arranged on the outer side of the leak detection box and is located on the gas transmission pipeline; the valve V8 is arranged on the purging pipeline; one end of each of the first detection pipeline, the second detection pipeline, the third detection pipeline, the fourth detection pipeline and the fifth detection pipeline extends into the leakage detection box; the other ends of the first detection pipeline, the second detection pipeline, the third detection pipeline, the fourth detection pipeline and the fifth detection pipeline are gathered and then communicated with a total leakage detection pipeline; the total leak detection pipeline is respectively communicated with the vacuum pump and the helium mass spectrometer leak detector; valves V3-V7 are respectively arranged on the first detection pipeline, the second detection pipeline, the third detection pipeline, the fourth detection pipeline and the fifth detection pipeline; the detection efficiency of the leakage rate of the liquid engine is improved, and human factors are controlled.