37results about How to "Guaranteed normal entry and exit" patented technology

The invention relates to a silicon-carbon composite material and a preparation method thereof, and the silicon-carbon composite material is a mesh structure coated nano-grade silicon-carbon composite material. The mesh structure is a structure layer which is formed by mutually wound carbon fibers with a loose structure, and provided with uniform three-dimensional holes inside, and nano-grade silicon is uniformly dispersed in gaps of the mesh structure. The invention provides two preparation methods of the silicon-carbon composite materials, wherein the mesh structure is made by carbon pyrolysis and carbonization of bacterial cellulose. The silicon-carbon composite material is particularly suitable for cathode materials of lithium ion batteries, has high lithium storage capacity, and the special structure of the material can be used for effectively relieving the volume effect of silicon in a lithium ion battery charging and releasing process, so that the cycling stability of the anode material is further improved.

The invention relates to the technical field of hydrogen storage equipment, and specifically discloses a solid-state hydrogen storage device with high heat exchange characteristics, including an outer tank, the top of the outer tank is provided with an inlet and outlet valve, and several hydrogen storage devices are sequentially fixed inside the outer tank There is a gap of 0.5-3mm between adjacent hydrogen storage cylinders. Filters are fixed at both ends of the hydrogen storage cylinders. A number of heat-conducting partitions are arranged inside the hydrogen storage cylinder along its axial direction. It is divided into multiple hydrogen storage spaces, and hydrogen storage materials are installed in the hydrogen storage spaces. The invention adopts multi-layer storage space, which can realize faster hydrogen absorption, and effectively solves the problems of uneven distribution of hydrogen storage materials in the hydrogen storage tank and structural damage caused by stress concentration in the prior art; in addition, hydrogen storage materials The uniform distribution of the hydrogen absorption process makes the heat distribution more uniform, and the heat can be conducted out of the hydrogen storage device more quickly.

The present disclosure provides an advanced laser drilling machine mounted on a TBM and a working method, at least including a laser drill, a hole clearing drill, connecting parts and a laser drill; the laser drill includes a slag discharge fluid port and a laser emission terminal, and the connecting parts include a The inner cylinder and the outer cylinder sleeved by the first bearing; the laser drill rod includes the inner drill rod and the outer drill rod sleeved by the second bearing; the laser generating device passes through the inner drill rod and the inner cylinder through at least one continuous laser optical fiber After connecting with the laser emission terminal, the slag discharge fluid supply port communicates with the slag discharge fluid port through the continuous space of the inner drill pipe and the inner cylinder; this disclosure solves the problem of horizontal rapid drilling of the rock mass in front of the TBM drill It provides a fast and effective survey method for revealing the lithology, structure, groundwater, weak interlayer and other geological bodies and their properties in front of the tunnel face.

The invention relates to a rodent respiratory system exposure contamination device and belongs to contamination devices. The rodent respiratory system exposure contamination device aims to solve the problem that an existing smog contamination device is complex in structure and large in size, a smog collecting part and a smudging part are integrated, and the scald to experimental animals is caused easily. The rodent respiratory system exposure contamination device comprises a smog collecting box, a flue pipe and a fumigation box. The smog collecting box is connected with the fumigation box through the flue pipe, heat generated in smog caused by cigarette burning is reduced, and the temperature in the fumigation box is constant. The rodent respiratory system exposure contamination device is small in size and large in capacity, can perform experimental molding on plenty of experimental animals simultaneously and reduce differences between groups and other environmental disturbance. Gregarious habits of the experimental animals is guaranteed, the normal life environment of the animals is simulated, the animals are subject to no constraint and are in a free movement state, and accordingly more accurate experiment receptors are obtained.

The invention provides an anti-pollution aging method for putting black tea into a packaging container with a ventilated extraction valve having sealing and filter films and specially designed packaging container for implementing the method, wherein the method comprises the following steps of: a) putting the black tea into the packaging container with the ventilated extraction valve, and keeping the black tea in a sealing state; b) screwing on a first regulation protecting cover of aventilated valve, wherein the ventilated extraction valve comprises a ventilated valve and an extraction valve; c) screwing off a sealing cover of the extraction valve, pumping by a vacuum pump so that the vacuum degree in the packaging container is smaller than or equal to 150-250 Pa, reducing air, dust particles and microorganism carried by the air in the container to least, and screwing on the sealing cover of the extraction valve so as to keep the extraction valve in the sealing state; and d) loosening the first regulation protecting cover of the ventilated valve reversely by screwing, causing the air to pass through a micropore filter film to enter in and out the bag, preventing the particles and microorganism outside from entering into the packaging container, naturally oxidizing the tea to finish the anti-pollution aging so that the tea is more fragrant when the time is longer. The invention also provides the packaging container for implementing the method.