146results about How to "Improve leak detection efficiency" patented technology

The invention provides a cavity product airtightness detection table and a detection method. The cavity product airtightness detection table comprises a helium source, a helium mass spectrometer leak detector and a sealing device, wherein a hollow cavity for mounting a to-be-detected product is formed in the sealing device; the hollow cavity is divided by the to-be-detected product into a first sealing cavity and a second sealing cavity independent of each other; the first sealing cavity is communicated with an inner cavity of the to-be-detected product; the to-be-detected product is positioned in the second sealing cavity; the helium source is communicated with the first sealing cavity through an intake duct; and the helium mass spectrometer leak detector is communicated with the second sealing cavity through an exhaust duct. In the invention, the helium is introduced into the first sealing cavity through the helium source; and based on the characteristics of small molecular weight and excellent penetrability of the helium, the gas in the second sealing cavity is subjected to exhaust detection by the helium mass spectrometer leak detector to obtain a leakage rate detection result of the to-be-detected product, the airtightness detection accuracy is high, and the detection result is accurate and reliable.

The invention relates to a charging traverse evacuating helium testing and insulating medium technology method that puts the charging traverse box in the sealing box and taking the process of adding nitrogen to test leakage and charging helium. Taking vacuuming to the charging traverse box and the sealing box and taking synchronization charging to ensure the pressure differential would not be over rated value, the distortion would be avoided. The nitrogen filling leakage testing is safe. It has high testing efficiency and high testing accuracy.

The invention provides a town central heating system and a leakage point detection method. The system comprises a heat source, a heat supply pipe network and the users, the heat supply pipe network comprises a water supply pipe network and a water return pipe network, the system partitions the heat supply pipe network through partition flowmeters, and the pipe network online monitoring system reads the pressure and the flow of a heat source and a user and the data of the partition flowmeters according to a set fixed time interval, stores the pressure and the flow in a database in real time, and calculates the cumulative sum of the flow differences of inlets and outlets of partitions. According to the system and the method, the leakage point detection precision is greatly improved, and the timely and accurate diagnosis and positioning of the leakage fault of the urban central heating pipe network are realized.

The invention discloses an on-line detection platform for electromagnetic valves, which comprises an intake assembly, a fixture, a signal acquisition module and a process control module. The air intake assembly includes an air pressure adjustment and control module and a pressure holding assembly for controlling the intake pressure. One end of the air intake assembly is connected to the external air source, and the other end is connected to the air inlet of the measured solenoid valve; the signal acquisition module is used for time-sharing acquisition The air pressure signal of the same measured point; the process control module judges the air tightness of the tested valve by processing the time-sharing collected data signal of the signal acquisition module. The device uses a pressure sensor and adopts a pressure maintaining method to realize dry leak detection of the device to be tested. The pressure sensor is connected to the acquisition module, and the software quantitative analysis determines whether the device under test is leaking by collecting the air pressure values ​​in different time periods. Only one gas circuit control valve and one pressure sensor are needed, and no standard parts, differential pressure sensors, etc. are required. The gas circuit is simple and the cost is low, and the leak detection of the tested part can be performed quickly and conveniently.

The invention provides a pipeline multi-point leakage accurate positioning method. Firstly, original signals are decomposed into the sum of several IMFs by using an improved CEEMD; then envelope signals of the IMFs in all orders are calculated, and a sample entropy of each envelope signal is calculated; then according to the size of sample entropy values, the IMFs in all orders are optimized, andthen the preferred IMFs are reconstructed and are subjected to dimension raising; single leak source signals are separated through a blind source separation and signal sparsity combined manner; and finally, a time difference positioning formula is used for positioning leakage points. The experimental results show that the method is suitable for pipeline multi-point leakage detection and location,the pipeline leakage positioning accuracy can be improved to a large extent, and the powerful theoretical basis and practical experience are provided for practical engineering application.

The invention relates to a rapid connection device of straight pipe helium mass spectrometer leak detection. The device comprises a pipeline connecting piece, a sealing rubber washer, a snap ring assembly, a bolt and a flat washer. One end of the pipeline connecting piece is a vacuum-standard quick-release connector connection disk and the other end is a snap ring installation disk. The connection snap ring assembly comprises a movable semi-ring and a fixed semi-ring. The two semi-rings are connected together through a semi-ring joint hinge. The fixed semi-ring is connected to and fixed on the pipeline connecting piece through the bolt and the movable semi-ring can rotate about the semi-ring joint hinge. By using the apparatus, a vacuum system connection interface does not need to be welded on the pipeline; rapid connection of a smooth straight tube and a vacuum-standard quick-release connector can be conveniently and rapidly realized without changing and processing tubing; leak detection preparation time is shortened and tubing leak detection efficiency is increased.

The invention discloses a helium mass spectrometer leak detector suction gun for spacecraft leak detection. The helium mass spectrometer leak detector suction gun comprises an external structure and an internal structure. The external structure comprises a medical needle, a suction gun rod, a front cavity chamber, a middle cavity chamber, a rear cavity chamber, a suction gun handle and a flexible pipe which are mechanically connected and arranged in turn. The suction gun handle is arranged below the three cavity chambers. The flexible pipe is arranged on the lower end of the handle and used for being connected with a leak detector. The internal structure comprises sealing rubber rings, a filtering sheet, a cylinder with a hole and a conical head, a connecting rod and a pressure regulating column which are arranged in turn. The rear end of the suction gun rod and an air outlet end of the front cavity chamber are respectively provided with the sealing rubber rings and the filtering sheet. The two sealing rings are used for sealing the internal structure and the external structure of the suction gun. Pressure or flow of air entering into the leak detector is regulated via distance between the hole and the conical head. The conical cylinder and the pressure regulating column are connected by the connecting rod. The suction gun is applicable to helium mass spectrometer leak detectors with different models, and pressure of leak detection openings of the leak detectors can be controlled within a range from being greater than a dozen Pa to several hundred Pa so that test of the leak detectors with various models is facilitated, response speed in the detection test can be effectively improved and leak detection efficiency is enhanced.

The invention discloses a helium mass spectrometer leak detection device for a pipe-to-pipe butt welding line. The device comprises a box body (1), a box body joint (5) and a helium mass spectrometer,wherein a through hole (101) is formed in the box body (1), the box body joint (5) is arranged on the box body (1) and is connected with the helium mass spectrometer, and the through hole is formed on the box body joint (5) so that the helium mass spectrometer communicates with the inner space of the box body (1). The helium mass spectrometer leak detection device for the pipe-to-pipe butt welding line has the advantages of being free from damaging pipes and welding lines, high in leak detection efficiency, low in cost, easy in manufacturing, high in reliability, and capable of determining leak point positions and the like.

The invention provides a centralized leakage detection device for an airtight cooling system of a blast furnace. The airtight cooling system of the blast furnace is provided with a plurality of cooler branch pipeline water strings in the circumferential direction of the blast furnace. The cooler branch pipeline water strings are divided into a plurality of subareas along the circumference of the blast furnace. Each subarea comprises the corresponding cooler branch pipeline water strings and serves as a centralized leakage detection area. Each cooler branch pipeline water string in each subarea is connected with a hose through a three-way valve and connected with a connecting branch pipe through a rapid connector, the connecting branch pipes in each subarea are connected to a connecting main pipe, the outlet end of the connecting main pipe is connected with a drainage pipe communicating with a drainage tank, and a drainage valve is arranged in the drainage pipe; a pipeline at the outlet end of the connecting main pipe in each subarea is provided with a pressure gauge and connected with a degassing bag through a connecting pipe, the degassing bag is provided with an exhaust pipe and an exhaust valve, the upper portion of the degassing bag is provided with an overflow pipe and an overflow valve, and the outlet end of the degassing bag is connected to the drainage pipe; and each degassing bag is provided with an inlet valve. By the adoption of the centralized leakage detection device for the airtight cooling system of the blast furnace, breakage and leakage points of coolers of the airtight cooling system of the blast furnace can be detected rapidly, efficiently and accurately.

The invention discloses a water purifier detection device and a method of leakage detection by adopting the same. The water purifier detection device comprises a gas source, an electric control device and a connection device, wherein the electric control device comprises a pressure detection device, a controller, a total control valve, a first control valve and a second control valve. Each branch gar tube is controlled via different control valves (the first control valve and the second control valve) respectively. While a to-be-detected water purifier connected with one branch gas tube is in a pressure maintaining state, a to-be-detected water purifier is arranged on the other branch gas tube for leakage detection, and therefore, leakage detection can be carried out on a plurality of to-be-detected water purifiers with the same time zone respectively, and the leakage detection efficiency is improved.

The invention relates to a lithium battery electric-leakage detection method. The method comprises the steps of: (1) feeding inert gas simultaneously to a cathode and an anode of a battery pack, closing an inlet valve, and detecting a pressure reducing speed in the battery pack; (2) feeding isobaric reaction gas to the anode and the cathode of the battery pack so as to carry out activation on batteries, simultaneously detecting the performance of each single battery, and determining performance uniformity of membrane electrodes in the battery pack; (3) using inert gas to carrying out isobaric pulse purging on the cathode and the anode of the battery pack, totally blowing out residual liquid water of the battery pack, and then carrying out normal temperature detection and heating detection on the battery pack; (4) carrying out three-dimensional simulation on the heating process of lithium batteries, and obtaining a temperature change simulation curve; and (5) carrying out charging and overcharging on the lithium batteries, measuring a temperature changing curve and a voltage change curve, and detecting the overcharge safety performance of the lithium batteries. According to the invention, through the detection of inert gas, the back-flow membrane electrode can be accurately detected, so that the leakage detection efficiency of the membrane electrodes is improved.

This invention relates to a kind of probe built-in type hydrogen leak detector, includes external air suction pipe, minitype aspirator pump, hydrogen agile probe, signal processing circuit and indicating circuit. the character lay: hydrogen agile probe and minitype aspirator pump built in hydrogen leak detector; entry of minitype aspirator pump connect with end of external air suction pipe; hydrogen agile probe put at outlet pipe of minitype aspirator pump; hydrogen agile probe adopt hydrogen agile semiconductor transducer, its signal output end connect with input end of signal processing circuit; Signal processing circuit's output signal is send to indicating circuit to process detecting outcome and setting leak source.

The invention discloses a novel fin evaporator leak detection line, which comprises a water tank, an air blowing table, a conveyor belt, a quick connector conveyor chain, and a bench, and is characterized in that the water tank is made of transparent glass; the bottom part of the water tank is provided with a downspout valve; the bottom part of the water tank tilts towards the downspout valve at a certain slope; two sides of the water tank are provided with dual-pipe explosion-proof lighting lamps; the entire water tank is fixed on the bench; the air blowing table is provided with a strong air blowing device and a water receiving device; water collected by the water receiving device can flow back to the water tank; the conveyor belt is connected with the water tank and the air blowing table; the transition section from the water tank to the air blowing table rises at a slope of 20+/-0.2 DEG; the quick connector conveyor chain and the conveyor belt share one variable-frequency motor to be driven; the bench is made of an aluminum alloy material, and the maximal bearing weight of the bench is no smaller than 3t. The novel fin evaporator leak detection line is economic and practical, the leak detection efficiency is high, water-saving effects are high, and the novel fin evaporator leak detection line can be matched and joined with a drying line and a blunting line for use.

The invention discloses a leakage detecting device of Hansen valve, comprising a ventilating tube whose first end is connected with a gas source; a detecting container which is limited with a detecting cavity that is gas-tightly connected with a second end of the ventilating end; multiple detecting pipes which are installed on the detecting container at intervals. One end of each detecting pipe is gas-tightly connected with the detecting cavity and the other end of each detecting pipe is gas-tightly connected with a Hansen valve. The leakage detecting device of Hansen valve provided by the embodiment of the invention has the advantage of high leakage detecting efficiency and greatly increases the production efficiency of the refrigerator.

The invention provides a gas sampling bag leakage detection device and a detection method. The detection device comprises a loading device arranged on the sampling bag and a shift detector for detecting a falling height or a downward rotation angle of the loading device. The gas sampling bag leakage detection device provided by the invention may accelerate, based on the loading device in a vertical direction, detect leakage collapses and deflation of the sampling bag which has a certain degree of gas leakage, and can obviously improve leakage detection efficiency. The shift detector measures leakage conditions of the sampling bag based on mechanical, electronic, and optical principles without interferences from environmental noises in an experiment lab and influences of personnel's subjective consciousness, and the result is accurate. The leakage detection process can be performed synchronously with an aging cleaning process or sample loading analysis process of the gas sampling bag without influencing conventional procedures and schedules of gas analysis and detection.

The invention relates to a safety detection method of lithium battery airtightness. The method comprises: (1), inert gas is led to a cathode and an anode of a battery group, an inlet valve is closed, and a pressure reduction rate inside the battery group is detected; (2), an inlet and outlet of circulating water of the battery group are sealed, one of inlets and one of outlets of cathode and anode air cavities of the battery group are sealed, inert gas is introduced from the single side of the cathode air cavity or anode air cavity, and a rate of gas leaked from a membrane electrode to another cavity is detected; (3), reactant gas with the equal pressure is led into the anode and cathode of the sealed battery group to activate the battery, the performance of each segment of battery is detected, and performance uniformity of the membrane electrode inside the battery group is determined; (4), the inert gas is used for carrying out equal-pressure pulse blowing on the cathode and the anode of the battery group, residual liquid water in the battery group is blown out, and normal-temperature detection and rising-temperature detection are carried out on the battery group. According to the invention, a membrane electrode with a gas leakage phenomenon can be determined accurately based on inert gas detection, thereby improving the leakage detection efficiency of the membrane electrode.

The invention discloses a method for accurately positioning leakage points by using monitoring signals of leakage monitoring instruments. The technical principle of the method is as follows: firstly arranging the leakage monitoring instruments on a pipeline at intervals, and then carrying a signal collecting host machine to collect the signals of the leakage monitoring instruments on the second day or any day after the leakage monitoring instruments are arranged. The accurate positions of the leakage points are determined by using the signal attenuation law of sound in the pipeline according to the signal strength of the monitoring instruments sending out leakage alarm signals and the two nearest monitoring instrument at the two sides. Compared with the traditional method for monitoring the leakage of urban water supply networks, the method has the advantage of being capable of accurately positioning and greatly improving the efficiency of leakage monitoring as well as effectively reducing the leakage rate of pipe networks.

The invention discloses a leakage detection platform for hydrogenation equipment, and the platform comprises a vacuum chamber which is provided with a mounting hole with a through bottom, one end of the mounting hole is suitable for being connected with the hydrogenation equipment, and the other end of the mounting hole is connected with vacuumizing equipment; the pressurization system comprises a helium source, a compressor and a booster pump, the helium source, the compressor and the booster pump are sequentially connected, and the tail end of the pressurization pipeline is suitable for being connected with hydrogenation equipment; the helium leak detection system comprises a suction gun, a mechanical pump, a first helium mass spectrum detection module and a second helium mass spectrum detection module which are connected in sequence, the suction gun, the first helium mass spectrum detection module and the second helium mass spectrum detection module are arranged in the vacuum chamber, and the mechanical pump is located outside the vacuum chamber; and the executing mechanism is fixedly connected to the upper portion of the vacuum chamber, a suction gun is connected to the executing mechanism, and the executing mechanism is suitable for controlling the movement track of the suction gun. The invention further provides a leakage detection method which is high in operability and high in safety and effectiveness, and the accuracy and reliability of the hydrogenation equipment during field leakage detection are improved.

The invention provides a heat storage and supply system. The system comprises a heat source, a heat supply pipe network, a user and a heat accumulator, wherein the heat supply pipe network comprises awater supply pipe network and a backwater pipe network, hot water enters the user for heat supply through the water supply pipe network, and cold water after heat supply returns to the heat source through the backwater pipe network; the heat accumulator is arranged on a first pipeline, the user is arranged on a second pipeline, and the first pipeline is connected with the second pipeline in parallel; and the water supply pipe network and the backwater pipe network are respectively provided with a third valve and a fourth valve, and the third valve and the fourth valve are opened when the heatsource operates, and when the heat source stops running or the energy of the heat source is insufficient, the third valve and the fourth valve are closed, so that the heat accumulator becomes a new heat source, a new heat supply system is formed by the heat accumulator and the user, and heat is supplied to the user through the heat accumulator. Through the above arrangement, it is ensured that the heat accumulator can store heat, and heat supply under the condition of insufficient conditions is met.

The invention provides a tube-shell type heat exchanger. The tube-shell type heat exchanger comprises a shell, wherein sealing heads are arranged at the two ends of the shell respectively, tube platesare arranged at the joints between the sealing heads and the shell, a heat exchange tube is connected with the tube plates at the two ends, the shell comprises a hot water inlet and a hot water outlet, the hot water inlet and the hot water outlet are connected with a hot water inlet pipe and a hot water return pipe respectively, the hot water inlet pipe and the hot water return pipe are providedwith a plurality of connecting points, a heat preservation layer is arranged outside the connecting points, and the tube-shell type heat exchanger is characterized in that a thermal imager is arrangedat the at least one connecting point. According to the tube-shell type heat exchanger, the good energy-saving and environment-friendly effects can be achieved.

The invention discloses an on-line leak detection device for a drainage system pipeline. The on-line leak detection device comprises a leak detection device body, wherein the leak detection device body comprises a four-way valve, an air tube, a pressure gage, a pressurizing air bag and a sealed air bag, wherein the two ends of the air tube are respectively connected with a first port of the four-way valve and the sealed air bag; an air inlet and an air outlet are respectively formed in the two ends of the pressurizing air bag; the air outlet of the pressurizing air bag is connected with a second port of the four-way valve; an air inlet one-way valve is mounted at the air inlet of the pressurizing air bag; the pressure gage is mounted at a third port of the four-way valve; an air discharge switch is mounted at a fourth port of the four-way valve. Through the adoption of the structure, the on-line leak detection device for the drainage system pipeline, provided by the invention, is simple in structure and convenient to operate, and can greatly reduce the leak detection cost and effectively improve the leak detection efficiency.

The present invention discloses a tube helium mass spectrometer leak detection apparatus. The tube helium mass spectrometer leak detection apparatus comprises s a vacuum joint (1), a mandrel (2), a pressing member (3), a gasket (5), a support member (6), and a helium mass spectrometer. The mandrel (2) is a hollow tubular structure; the vacuum joint (1) is arranged at the top of the mandrel (2); the pressing member (3), the gasket (5) and the support member(6) sleeve on the mandrel (2); the support member (6) is detachably fixed on the mandrel (2); and the pressing member (3) can move axially along the mandrel (2), so that the gasket ( 5) can expand radially along the mandrel (2) under the action of the pressing member (3) and the support member (6). The tube helium mass spectrometer leak detection apparatus provided by the present invention has multiple advantages such as easy manufacture, a simple operation, high reliability, high leak detection efficiency, a low cost, reusability, and the like.