4 results about "Helium gas" patented technology

Disclosed is a helium leakage detection device and method for a double-layer pipe with an interlayer. In a helium leakage detection tool for a double-layer pipe, an inner pipe is sleeved with an outerpipe, the inner pipe is connected with the first end of a sealing flange box in a sealed mode through a first sealing piece, the outer pipe is connected with the second end of the sealing flange boxthrough a second sealing piece, and the diameter of the first end is smaller than that of the second end; one end of the inner pipe is blocked by a first blocking plate, and the other end of the innerpipe is blocked by a second blocking plate; a helium introducing hole is formed in the first blocking plate; an inflation cover is arranged outside the outer pipe, and a helium introducing hole is formed in the inflation cover. The detection device is simple in structure, convenient to disassemble and assemble, capable of achieving air tightness testing of the inner layer and the interlayer of the double-layer pipe, high in leakage detection precision, high in detection efficiency, low in cost, capable of achieving overall testing and capable of meeting the leakage detection requirement of the double-layer pipe with the interlayer.

The invention provides full-automatic equipment and method for testing the helium diffusion coefficient of a reactor material. The equipment comprises a gas source control valve, a mass flow controller, a flow control valve, a low-vacuum-side vacuum gauge, a gas discharging control valve, a data acquisition card, a test pond control valve, a sample test pond, a sample to be tested, a high-vacuum-side vacuum gauge, a vacuum pump, a vacuum pump control valve, a helium detector, a computer, a helium gas source, a relay and pipelines; a test system comprises a data acquisition card and a computer; the computer is used for receiving, storing and analyzing data of the low-vacuum-side vacuum gauge, the high-vacuum-side vacuum gauge, the mass flow controller and the helium detector, and performing the process flow control on a system through controlling parts, so as to finally realize the automatic testing and result outputting. According to the equipment and the test method, the helium diffusion coefficient of the reactor material can be automatically tested and the problems of complexity in operation and poor test result repeatability in conventional test equipment are solved.

The invention discloses a high-pressure helium shale porosity testing device and method. The high-pressure helium shale porosity testing device comprises a reference cylinder, a pressure cylinder, a sample cylinder, a differential pressure sensor, a pressure gauge, an emptying vacuum-pumping system, a temperature control system and a pipe valve system, the reference cylinder is respectively connected with a helium source, the pressure cylinder and the sample cylinder through a pipe valve system, the differential pressure sensor is arranged at the position of the sample cylinder, the pressure gauge is arranged at the position of the pressure cylinder, the sample cylinder is further connected with the emptying vacuum-pumping system through the pipe valve system, The temperature control system is used for controlling the temperature of the whole device; according to the invention, the high-precision differential pressure sensor is used for directly measuring the change of small differential pressure, and the real gas characteristics of helium under high pressure are considered during calculation, so that the testing precision of the porosity under high pressure is comprehensively improved. The sample used in the experiment can be a columnar sample or a rock debris or powder sample.