8results about How to "Impenetrable" patented technology

The utility model relates to pipeline maintenance and repair technical field, concretely discloses a kind of automatic extraction maintenance device of water in natural gas pipeline, including the shaft seat of being provided with flange, further including the leather bowl installed to the outside of flange, lip is opened in leather bowl side edge, and lip divides leather bowl side edge to form front lip and back lip, multiple guide members are rotationally arranged in lip. The utility model actively meets the sewage accumulated in front of natural gas pipeline through front lip, and the space of lip realizes the storage obstruction in front of back lip, so that sewage is not easy to penetrate from back lip to rear leather bowl, improve the use effect of entire pipe cleaner, by adjusting the roller deflection in the axis direction of leather bowl side edge, so that multiple rollers on leather bowl roll along one spiral direction, facilitate the spiral progression of pipe cleaner in natural gas pipeline, realize the change of leather bowl side edge direction, avoid the positioning of leather bowl side edge in some place always buried in sewage operation, and further protect the sealing of pipe cleaner.

This application discloses an adhesive tape for paint repair, relating to the field of automotive paint repair. It includes a base layer, a barrier film layer fixedly installed on top of the base layer, an outer layer fixedly installed on top of the barrier film layer, and an adhesive layer at the bottom of the base layer. The adhesive layer has a positioning mechanism at its bottom for positioning the base layer, and the positioning mechanism includes a release paper layer disposed at the bottom of the adhesive layer. This application allows the second positioning paper layer of the release paper layer to be peeled off via a second easy-tear portion. At this point, one side of the tape can be adhered to the designated position. Then, the first positioning paper layer is peeled off, and the tape is adhered again. Finally, the third positioning paper layer is peeled off via a third easy-tear portion, completing the tape's adhesion and positioning. Therefore, the tape effectively positions the tape during application, provides high edge adhesion, and prevents paint penetration while isolating the topcoat.

The present invention provides novel hollow silica particles with a densified shell and a method for producing the hollow silica particles. The hollow silica particles of the present invention have a shell layer containing silica, have a space portion inside the shell layer, and have a particle density of 2.00 g / cm 3 or less, as determined by density measurement based on a dry pycnometer using helium gas. 3 or less, as determined by density measurement based on a dry pycnometer using oxygen gas.

This utility model relates to the field of medical device technology, and in particular to a sputum sampling device, comprising a long tube with one end shaped like a frustum. A piston is installed inside the long tube, and a push-pull assembly is provided at the piston. A sealing block is slidably mounted at one end of the long tube, with the vertical projection of the piston located on the sealing block. An adjustment assembly is provided at the sealing block to adjust the sealing performance of the sealing block at one end of the long tube. A sleeve is connected to the outside of the long tube, and a groove is formed on one side of the top of the sleeve. A movable block is slidably mounted on the groove, and a connecting rod is provided between one side of the movable block and one side of the piston. The connecting rod is curved. During one-handed operation, the operator's thumb can move the movable block within the groove, causing the movable block to move along with the connecting rod. The connecting rod, in turn, moves the piston within the long tube, reducing the difficulty of suctioning sputum and thus avoiding the formation of air bubbles and splashing of sputum caused by the airbag.

The present invention discloses a latch-propelled pediatric lumbar puncture device, which comprises a puncture assembly, a pipe fitting, and a pushing assembly. The puncture assembly comprises a puncture needle and a needle core. The puncture needle is hollow, and the needle core is pluggably arranged in the puncture needle. A sliding hole for the needle core to slide is provided in the pipe fitting, and the sliding hole is arranged along the length direction of the pipe fitting. The pipe fitting has a connecting cavity for the puncture assembly to move, and the connecting cavity opens outward and is connected to the sliding hole. A convex structure is provided outside the puncture needle, and the pushing assembly has a driving recess engaged with the convex structure. The pushing assembly is movably arranged in the connecting cavity, and the driving recess drives the convex structure to move and links the puncture assembly to move by pushing the pushing assembly. The latch-propelled pediatric lumbar puncture device of the present invention has the advantages of simple structure, high success rate, and low damage and pain.

The utility model discloses a breast pump. The breast pump comprises a horn cover, a milk bin piece and a main machine. The horn cover comprises a cover body, a heating piece and a first terminal assembly, the heating piece and the first terminal assembly are arranged on the cover body, and the first terminal assembly is electrically connected with the heating piece. The milk bin piece is hermetically connected with the horn cover to form a milk storage cavity; the host comprises a main body and a second terminal assembly, and the second terminal assembly is used for making electrical contact with the first terminal assembly. The breast pump is provided with an annular sealing part, the milk bin piece comprises a partition wall, and an electrode through hole is formed in the partition wall; the first terminal assembly is in electrical contact with the second terminal assembly, and the annular sealing part hermetically surrounds the peripheries of the first terminal assembly and the second terminal assembly. By means of the mode, the sealing performance of connection between the horn cover and the main machine can be improved, water, emulsion and other liquid are not prone to entering the gap between the horn cover and the main machine, and therefore the situations that contact points in the horn cover or the main machine are damaged or short-circuited or the like are reduced, and the safety of the breast pump is improved.

This invention relates to the field of epoxy adhesive technology, and discloses an epoxy adhesive for semiconductor chip packaging and its preparation process; including the following steps: Step 1: Epoxy resin and 3-(perfluorohexyl)epoxypropane are added to ethanol and mixed evenly, then 2-imidazolium-1-ethylamine is added, and the mixture is reacted at 50~60℃ for 4~6 hours to obtain modified epoxy resin; Step 2: Modified epoxy resin, modified polyurethane, defoamer, and diluent are vacuumed and stirred at 800~1200 rpm / min for 40~50 minutes, then nano zinc oxide and curing agent are added sequentially, and the stirring speed is reduced to 200~400 rpm / min for 1~2 hours to obtain epoxy adhesive.