10 results about "Liquid nitrogen" patented technology

The invention belongs to the technical field of marine organisms, and concretely relates to a method for the efficient ultralow temperature cryopreservation of turbot sperms. The method comprises the following steps: mixing the seminal fluid of turbots with an antifreeze liquid according to a volume ratio of 3:1-4:1, carrying out two-step cooling treatment, carrying out one-step balancing, adding to liquid nitrogen (having a temperature of -196DEG C), and preserving; and the antifreeze liquid is composed of a diluent, an antifreeze agent and an additive. High-quality frozen sperms obtained through the method for the efficient ultralow temperature cryopreservation of turbot sperms are of great significance of the artificial breeding, germplasm preservation, heredity diversity and sustainable culturing of the turbots.

The invention discloses a device for quickly drilling in frozen earth and a construction method of the device. The device and the method aim to increase drilling speed. The device for quickly drilling in the frozen earth comprises a drill pipe and a drill bit. A through nitrogen conveying hole is formed in the drill pipe and the drill bit, the drill bit is provided with a liquid nitrogen outlet, the rear end of the drill pipe is connected with a liquid supply pipe, and the liquid supply pipe is connected with a liquid nitrogen storage tank. The invention further discloses the construction method for quick drilling in the frozen earth. The method includes the following steps that the drill pipe extends into a drilled hole frozen in advance; liquid nitrogen in the liquid nitrogen storage tank is input into the drill bit fixed at the bottom of the drill pipe through the liquid supply pipe, and the drill bit is precooled; after precooling, a drilling machine is started, the drilling machine drives the drill pipe to rotate and impact, and the drill pipe drives the drill bit fixed at the bottom of the drill pipe to rotate to drill; in the drilling process, the liquid nitrogen in the liquid nitrogen storage tank flows out from the liquid nitrogen outlet of the drill bit after passing the liquid supply pipe, the nitrogen conveying hole in the drill pipe and an internal channel of the drill bit. The device and the method are suitable for drilling through the drill bit in frozen holes.

A flywheel energy storage mixed type superconducting magnetic bearing is composed of a stainless steel spindle (1), a radial electromagnetic bearing stator (2), a low-temperature Dewar (3), a superconducting bearing permanent magnetic rotor (4), a superconducting bearing block stator (5), a superconducting bearing coiling stator (6), a superconducting bearing iron magnetic suction force disk rotor(7), a flywheel (8)m a radial electromagnetic bearing iron magnetic ring rotor (9) and a superconducting bearing iron core magnetic yoke (10). The superconducting bearing block stator (5) and the superconducting bearing coiling stator (6) are arranged inside the low-temperature Dewar (3) and installed on the stainless steel spindle (1) in a sleeving mode, and liquid nitrogen or a refrigeration machine is used for cooling. The superconducting bearing coiling stator (6) is arranged below or around the superconducting bearing block stator (5). The radial electromagnetic bearing stator (2) is installed on the upper portion of the stainless steel spindle (1) in a sleeving mode. The superconducting bearing iron magnetic suction force disk rotor (7) is installed outside the low-temperature Dewar(3) and installed on the stainless steel spindle (1) in a sleeving mode.

The invention relates to a low temperature liquefaction vehicle fuel tanker operation box pipeline equipment plugging simulation test bench. The bench includes a pipeline, a first shut-off valve, a second shut-off valve, a shut-off valve-pipe elbow connection plugging device and a shut-off valve stem plugging device, the first shut-off valve and the second shut-off valve are installed in the pipeline, an elbow connection structure is formed between the first shut-off valve and the pipeline, the pipeline is connected with a liquid nitrogen bottle, the shut-off valve-pipe elbow connection plugging device is installed at the elbow connection of the first shut-off valve and the pipeline, and the shut-off valve stem plugging device is mounted on a valve stem of the second shut-off valve. The bench can conduct simulating experiment on the leakage plugging of the internal shut-off valve of a liquefied natural gas tank car operation box, a pipe elbow joint and the shut-off valve stem, and achieve the purpose of verifying the plugging effect.

The invention provides a mobile energy station. The mobile energy station comprises an LNG gasifier, a power generator and a gasifier heating liquid-bath box, wherein the LNG gasifier is connected with the power generator through a gas exhaust pipe; the LNG gasifier is at least partially immersed in the gasifier heating liquid-bath box in which a cooling liquid is accommodated. The mobile energy station further comprises an LNG storage tank connected with the LNG gasifier, wherein a liquid nitrogen storage tank used for exchanging heat with LNG stored in the LNG storage tank to cool the LNG is arranged in the LNG storage tank; and the liquid nitrogen storage tank is provided with a nitrogen charging pipe. The invention further provides an energy utilization method for the mobile energy station. According to the invention, methane emission can be at least replaced with liquid nitrogen emission so that the safety and environmental protection property are enhanced.

The invention relates to a method for removing at least part of at least one layer of a composite coating that is formed of fibers and at least one resin that is present on the surface of the body of a gas cartridge. In said method, at least one liquid nitrogen stream is dispensed at a temperature less than −100 DEG C at a pressure of at least 00 bars upon contact with said coating so as to remove at least part of said coating layer present on the body of the gas cartridge.