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

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 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 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.

The present invention relates to a method for preventing words from lifting a gun and judging the sealing state of a refueling device. The first step is to send a first signal to an encoder when the gun is lifted, so that the encoder sends a first pulse signal and receives the first pulse signal; The second step is to preset the pre-fueling period, and judge whether the pre-fueling is over according to the state of the first pulse signal received during the pre-fueling period. When it is judged that the pre-fueling is over, send a second signal to the encoder to make the encoder start sending The second pulse signal; the third step is to perform billing according to the second pulse signal; wherein, according to the state of the first pulse signal received during the pre-fuel period, determining whether the pre-fuel is over includes, if the first pulse signal is not received, Then it is judged as the end of pre-fueling, if the received first pulse signal changes from presence to non-existence, then it is judged as the end of pre-fueling, the present invention can prevent the occurrence of the problem of raising the gun and jumping characters and determine the sealing state of the refueling device.