40results about How to "Judgment of tightness" patented technology

The disclosed vehicle door lock device is equipped with a latch mechanism, a lever mechanism, a link mechanism and an electric actuator, which are assembled in a housing. The housing is provided with a housing body and a housing cover that are interconnected, and is arranged such that the connection surface extends vertically. A seal is formed at the connection between the housing body and the housing cover in a manner such that the seal surrounds the upper part of the housing space where the link mechanism and the electric actuator are accommodated. The seal is provided with a path, which has one open end, and inner and outer welded sections, which are contiguously formed along the passage on the inner side and the outer side of the housing. Thus, water-proofing measures (the seal) for the electric actuator (electrical part) are simply and inexpensively configured and it is easy to the condition of the seal.

The invention discloses a device for detecting mould impermeability, belonging to the technical field of mould. The device comprises a tank body which is communicated with a water inlet pipe, an air inlet pipe and a water and air outlet pipe. The water inlet pipe is connected with a water source. The water and air outlet pipe is connected with the mould. The air inlet pipe is connected with an air source. The device drives water into the mould by compressed air, thereby overcoming the disadvantage that the drive pressure of a water pump is too high as well as the disadvantage of the low efficiency of manual pressurizing.

The invention discloses a gas leakage detection method for an engine cylinder. On the condition of no oil being sprayed to the engine, a motor is used to drive the engine to operate. If the compression stroke time of one or a plurality of cylinders of the engine is smaller than that of other cylinders and the power stroke time of the one or the plurality of the cylinders is larger than that of the other cylinders, determining the gas of the one or the plurality of the cylinders is leaked; if not, determining all the cylinders are complete in gas tightness. By the aid of the method, tightness of each cylinder of the engine can be determined rapidly, simply and accurately, the method can be applied in troubleshooting of vehicles, and repairing time can be reduced; normal components can be protected from being changed mistakenly, and repairing cost can be reduced.

The invention provides a sealing detection device of a cable gland, and the device comprises a manual pressurization pump, a water injection pipe, a first cup-shaped pipe joint nut, a second cup-shaped pipe joint nut as well as a first rear baffle ring, a combined sealing ring and a second rear baffle ring which are located between the first cup-shaped pipe joint nut and the second cup-shaped pipe joint nut, wherein the left end of the first cup-shaped pipe joint nut is connected to the first rear baffle ring and compresses the combined sealing ring; the left end of the combined sealing ring is connected to the second rear baffle ring; the first cup-shaped pipe joint nut, the first rear baffle ring, the combined sealing ring, the second rear baffle ring and the second cup-shaped pipe joint nut wrap a cable inside; a front clamping buckle and a rear clamping buckle which are connected through buckling and threaded connection sleeve the outer layer; a sealed water injection cabin is formed between a sleeve and the cable, and the sleeve is formed by the front clamping buckle and the rear clamping buckle; and the manual pressurization pump communicates with the water inject cabin by the water injection pipe. The device provided by the invention can simulate cable gland states under different depth conditions, can detect sealing performance of a sealing material of the cable gland and has the advantages of high control precision, small and compact appearance and convenient operation.

The invention relates to the technical field of tightness detection equipment, in particular to a kettle tightness detection device and a detection method employing the same. The kettle tightness detection device comprises a driving component and a detection component; the driving component drives the detection component to move up and down selectively so as to move into or leave an inner cavity of a kettle under detection placed below the detection component; the detection component comprises a support and an airbag in ring shape; the airbag surrounds the lateral side of the support; after being inflated, the airbag may attach to the inner wall of a kettle body; the bottom of the support is provided with a suction port and a vacuum sensor; the airbag is provided with an inflating port; the inflating port is connected with an air source through a first guide pipe; the suction port is connected with a vacuumizing device through a second guide pipe; during detection, the airbag moves down to the inner cavity of the kettle and expands and attaches to the inner wall of the kettle; air between the detection component and the bottom of the kettle is abstracted to increase the pressure toa threshold; tightness of the kettle is judged by detecting changes in the pressure. The detection component is tightly fitted to the kettle, the detection results are precise and reliable, and the kettle tightness detection device is good in practicality and universality.

The invention relates to a plastic bottle negative pressure detecting device which comprises a base, a cavity, a water container, a fixing unit and a pneumatic device. An air inlet hole is formed in the base, the cavity is formed in the base, a pressure applying cavity is formed by the cavity and the base, the air inlet hole is communicated with the pressure applying cavity, the water container is arranged above the cavity, the fixing unit is arranged between the cavity and the water container, and the pneumatic device is communicated with the air inlet hole. According to the plastic bottle negative pressure detecting device, pressure is applied to the exterior of a bottle opening through a negative pressure device, compressed air enters the pressure applying cavity through a reducing valve to apply pressure according to requirements, a tested sample has the internal-external differential pressure, the air overflowing conditions of the tested sample are observed, and the sealing performance of the tested sample is accordingly judged.

The invention discloses a high-voltage interlocking device, comprising a high-voltage interlocking signal detection and transmission module (1); in the high-voltage interlocking signal detection and detection module (1), an illumination tube (4) is adopted to convert an electrical signal into an optical signal for transmission, through the transmission of a high voltage interlocking optical fiber(5), a photoelectric converter (6) is adopted to convert the returned optical signal into an electrical signal. With the above technical scheme, the optical signal is more stable, and the transmissionof the optical signal is not easy subjected to electromagnetic interference, and the optical signal is used instead of the electrical signal for interconnection outside the module in a complex environment, and then the electrical signal generated by a photoelectric coupling circuit is adopted inside a detection module for detection, and the process is more accurate; after the photoelectric coupling, the strength of the electrical signal is detected, and the entire circuit sealing level can be judged, thereby judging the sealing performance of an overall system; the simple optical signal can be used as the interlocking signal, and an interlocking signal generation and detection circuit is no longer complicated.

The invention relates to an airtight valve airtightness detection platform. The airtight valve airtightness detection platform comprises an air compressor, a vacuum pump, a plenum chamber, an airtight valve and a reducer pipe, the reducer pipe is mounted on one side of the plenum chamber, a first ball valve, a second ball valve, a third ball valve and a fourth ball valve are mounted on the other side of the plenum chamber sequentially, the airtight valve is mounted at the end of the reducer pipe, the air compressor is mounted at the end of the first ball valve, the vacuum pump is mounted at the end of the second ball valve, a first pressure sensor is mounted at the end of the third ball valve, and a second pressure sensor is mounted at the end of the fourth ball valve. The airtight valve airtightness detection platform is simple in structure, good in measurement effect and quite high in practicality.

The present application discloses a device for preventing moisture diffusion inside an oil immersed transformer for absorbing moisture inside the oil immersed transformer, which comprises a moisture absorbing layer and a metal shielding mesh, wherein the moisture absorbing layer is disposed at the bottom of the transformer and located in the transformer, and can absorb the moisture inside the transformer to prevent the moisture from diffusion in a large range to affect the insulation performance inside the transformer; the moisture absorbing layer is made of a moisture-absorbing color-changingmaterial, and the moisture absorption situations of the moisture absorbing layer can be marked out through the color changing degree of the moisture-absorbing color-changing material; when during maintenance, the sealing and wetting situations of the transformer can be judged according to the color changing situations of the moisture-absorbing color-changing material; the metal shielding mesh isarranged on the moisture absorbing layer; and the metal shielding mesh is used for electric shielding. The device for preventing moisture diffusion inside the oil immersed transformer has simple structure and convenience for use, can be mounted in combination with transformer manufacturing, returning to factory for repair, on-site lifting cover inspection and the like, and does not affect the normal operation of the transformer.

The invention provides a crystal pulling production process of a single crystal furnace. The crystal pulling production process of the single crystal furnace comprises the following steps: 1) measuring the limit vacuum value when the single crystal furnace is vacuumized for m minutes (m is less than n, and n is the conventional single crystal furnace crystal pulling production vacuumizing time); and 2) after the single crystal furnace is charged and closed, vacuumizing for m minutes, detecting the vacuum value in the furnace, judging that sealing of the furnace body is qualified if the detection value is less than or equal to the limit vacuum value and continuing production, and judging that sealing of the furnace body is unqualified if the detection value is more than the limit vacuum value, performing leakage measurement and maintenance on the furnace body until the sealing of the furnace body is qualified and performing subsequent production. According to the crystal pulling production process of the single crystal furnace, the vacuum degree value is compared with the limit vacuum value after the furnace is closed, so that the sealing property of the furnace body is judged, operation is facilitated, the process route is optimized, the crystal pulling time is saved, the production efficiency is improved and great economic benefit is brought to production.

The invention discloses a battery cover plate leak detection method including the following steps that S1 a battery cover plate is clamped in an elastic washer; S2 an upper pressing plate and a lower pressing plate are locked and sealed, and a gas pipe is communicated with the lower pressing plate, a gas pressure adjusting valve, and a nitrogen tank; S3 the upper pressing plate and the lower pressing plate are immersed in the water vessel; S4 the nitrogen tank is opened, the gas pressure adjusting valve is opened, and the circulated gas pressure is adjusted to the range of 0.6-1MP; and S5 after 1-5 min, whether the opening of the upper pressing plate has bubbles blown out is observed. The method realizes the leak detection of the battery cover plate at the incoming material stage, avoids the risk of later leakage, and is quick and easy.

The invention discloses a full-sea-depth working condition simulation test system of a seawater hydraulic adjustable ballast device, and belonging to the related field of submersibles; the test systemcomprises a control valve group, three hand pumps, a three-plunger pump station and an open type water tank, wherein the control valve group is formed by integrating a plurality of valves; the control valve group comprises a plurality of stop valves, a port I and a port II are formed in the integrated control valve group; the port I is connected with the open type water tank; the port II is connected with an outlet of the three-plunger pump station; the three hand pumps are respectively a first hand pump, a second hand pump and a third pressure pump; each stop valve is controlled to be openedand closed through the first hand pump and the second hand pump, the three-plunger pump station and the third hand pump are adopted to simulate the marine environment, the first hand pump and the second hand pump are adopted to simulate a hydraulic source, and the open type water tank is adopted to simulate the ballast water tank and provide a water source for the three-plunger pump station. According to the system, various experimental data can be conveniently obtained, and reliable guidance is provided for the actual seawater hydraulic adjustable ballast device to work under the sea.

The invention discloses a sealing performance detection test bench for an integrated fire hydrant water pressure monitoring instrument. The test bench comprises a bracket, a water pump, a pressure pump, a support member, a cover plate, a fastener and two sealing rings. The support member is installed at the bracket and is provided with a first receiving groove and a water outlet hole communicatedwith the first receiving groove and the water pump; and the water pump and the pressure pump are communicated. A second receiving groove and a water inlet hole re formed in the cover plate; the secondreceiving groove matches the first receiving groove; the water inlet hole is communicated with the second receiving groove and the pressure pump; the fastener is used for connection of the cover plate with the support member; and the two sealing rings are installed at the two sides of a flange of an integrated fire hydrant water pressure monitoring instrument.

The invention discloses a top cover sorting device for food processing. The device comprises an operation table and a top cover, a thin film is arranged in the top cover, a separating plate is fixed to the operation table, an electric telescopic rod is fixed to the outer wall of the top of the separating plate, a wing plate is fixed to the outer wall of the top end of the electric telescopic rod, a plurality of glands distributed at equal intervals are arranged on the outer wall of the bottom of the wing plate, sealing covers are arranged on the outer walls of the tops of the glands, sealing rings are clamped to the outer walls of the bottoms of the glands, a conveying groove is formed in the outer wall of the top of the operation table, a conveyor belt is slidably arranged on the inner wall of the bottom of the conveying groove, and a gas detector is fixed to the outer wall of one side of the operation table. According to the device, the gas detector detects the pressure of gas in a gas-inlet pipe and detects the volume of the gas filled into the gas detector through a gas guide pipe, and the sealing performance of the top cover is determined according to the change condition of the gas pressure in the gas-inlet pipe and the volume number of the gas received by the gas detector through the gas guide pipe.

The invention provides a seal detection device of a blood perfusion device. The seal detection device of a blood perfusion device includes an inner packaging bag and a humidity card, wherein a blood perfusion device is arranged in the inner packaging bag, and the inner packaging bag is filled with positive pressure gas; the humidity card is embedded into the surface of the inner packaging bag or arranged in the inner packaging bag for detecting the humidity in the inner packaging bag.; the positive pressure inflation pressure in the inner package bag is 116 kPa to 130 kPa; and the inner package bag is subjected to an internal pressure of 132 kPa or more. The seal detection device of a blood perfusion device can conveniently determine the sealing property of the blood perfusion device, andcan conveniently and accurately determine whether the internal packaging bag is perfect and has no leakage.