10results about How to "Block escape" patented technology

This utility model discloses a thin-walled, thickened wireline coring drill rod for complex strata, relating to the field of drill rod technology. It includes a drill rod body comprising an outer tube, with an inner tube slidably connected within the cavity of the outer tube. A first groove is formed on the top of the inner wall of the outer tube, engaging with a borehole elastic retaining ring. A first limiting groove is formed on the top of the inner tube, engaging with the bottom of the borehole elastic retaining ring. An upper connector is threaded to the top of the outer tube, and a lower connector is threaded to the bottom of the outer tube. The drill rod body provided by this utility model reduces wear on the inner and outer tube walls while preventing pressure loss leading to reverse circulation failure. This solves the problems of high-pressure gas escape during drilling causing reverse circulation failure and borehole wall collapse, as well as severe friction and short lifespan of existing wireline coring drill rods.

The application provides a condenser assembly and a refrigerating device for an airplane, wherein the condenser assembly is applied to the airplane and comprises a condenser body having a first air port at a top end thereof and a second air port at a bottom end thereof, a heat exchange airflow flowing into the condenser body through one of the first air port and the second air port and flowing out through the other one of the first air port and the second air port, and a water collecting tray comprising a shell having a water collecting area at a bottom thereof and a ventilation area at an upper area of the water collecting area, wherein the ventilation area is arranged at least partially around a bottom end area of the condenser body, a water collecting depth of the water collecting area decreases from a middle to side edges, and a drain pipe is arranged in the water collecting area. The defrosting water collected in the water collecting area is not easy to overflow through the ventilation area at a higher position, so that the water collecting effect of the water collecting tray on the defrosting water is ensured, and the defrosting water on the condenser body can be reliably collected in the water collecting area of the shell under an inclined working condition.

The invention discloses a dynamic plaque cutting balloon catheter and a rotation driving mechanism, and relates to the technical field of medical instruments.The balloon catheter comprises a catheter assembly and a balloon body, the balloon body is arranged on the catheter assembly, and the balloon catheter further comprises an adjustable dynamic cutting assembly; the adjustable dynamic cutting assembly is connected to the catheter assembly, the adjustable dynamic cutting assembly is located outside the balloon body in a matched mode, and the balloon body can expand to open the adjustable dynamic cutting assembly; the adjustable dynamic cutting assembly comprises a cutting part and a containing part. The expansion size of the adjustable dynamic cutting assembly is controlled through expansion of the balloon body, so that plaque on the inner wall of a blood vessel can be effectively cut through the arranged cutting part and safely cut, plaque fragments generated by cutting of the cutting part can be collected through the storage part, the plaque fragments are prevented from escaping towards the far end of the blood vessel, and the safety of the blood vessel is improved. The safe cutting treatment on the blood vessel wall plaque is realized.

This invention relates to the field of residential ventilation and air purification technology, specifically to a ventilation system and control method for preventing kitchen fumes from escaping across spaces. The system includes a main exhaust system for a range hood and a double-layered air curtain above the kitchen doorway. The double-layered airflow forms a stable isolation barrier, preventing fumes from spreading into the living room. The air curtain employs a purely mechanical thermodynamic response structure, utilizing the thermal deformation of a bimetallic strip to drive the displacement of internal partition plates, adaptively adjusting the airflow volume and outlet angle of the two airflow paths, eliminating the need for an electronic control unit. When cooking is stopped, the air curtain evenly directs air downwards, blocking residual fumes; during cooking, it automatically increases the airflow volume on the living room side, enhancing the isolation effect. Coupled with the range hood, it increases the positive pressure at the doorway, improving the efficiency of fume capture and emission, and is adaptable to both closed and open kitchens, as well as open kitchen scenarios. This invention can significantly reduce PM2.5 concentration in the living room, effectively suppressing the cross-space escape of fumes, and has advantages such as simple structure, safety and reliability, low cost, and maintenance-free operation.

The utility model discloses a rail transit air conditioner mixed wind filter screen structure, include: filter screen piece, the filter screen piece has filter screen and the support frame of connecting in the filter screen periphery, the connecting frame has the filter surface for filtering particulate matter, the connecting frame can establish in the air intake and outlet of carriage, and the particulate matter of passing through the air intake and outlet is filtered through the filter surface, the fixed groove of sliding connection filter screen piece is established to the inside of the frame of connecting frame, and the plug -in groove that is communicated with fixed groove is passed through one side of connecting frame, the filter screen piece can be inserted into fixed groove along plug -in groove and slide, the surface of filter screen piece constitutes the filter surface, the elastic locking assembly is connected on the connecting frame and is close to the plug -in groove place, and the locking assembly includes: the rotating part and the fixed part of hinged with rotating part, and rotating part and fixed part are connected through elastic part between, for the elastic support rotating part is attached in the opening of the bottom of connecting frame close to plug -in groove, to block the connecting frame from moving out from plug -in groove.

The invention discloses a rock and ore powder anti-splashing sampling device for acid dissolution test, which comprises a temporary storage cylinder for temporarily storing rock and ore powder needing to be added into an acid solvent, a piston at the top end of the temporary storage cylinder is connected with a piston rod, and a taper pipe for sucking and discharging the powder is arranged at the bottom end of the temporary storage cylinder in a penetrating manner; a sampling piece for sucking powder or a sample introduction piece for discharging the powder into an acid solvent in the digestion container is clamped on the outer side of the taper pipe, a protection piece for preventing acid liquor from splashing is arranged on the sample introduction piece, and a supporting piece is arranged on the protection piece; through the sealed sampling and sample introduction structural design of the temporary storage cylinder, the sampling piece and the sample introduction piece, the problem of flying of rock ore powder in the sampling and sample introduction stages is completely eradicated, meanwhile, the immersed feeding and flushing process ensures that no sample residue exists, the sample quantification precision is greatly improved, the detection data deviation caused by sample loss is avoided, and the detection accuracy is improved. And an accurate and reliable basis for the to-be-detected liquid is provided for rock and ore component analysis.

The utility model relates to a mouse catching technology field. Specifically, it is a continuous mouse cage. The utility model discloses a mesh formula cuboid iron cage, is equipped with the door of placing the mouse of trapping cage and luring bait in the both ends of cage, is equipped with the pipe of can let the mouse see the luring bait and enter the cage in the edge place of both ends cage, is equipped with the device of only going in not going out in the end of the pipe in cage.

This utility model discloses a vibrating sieving device for porous carbon powder, comprising: a vibrating sieving unit, which includes a support base and a sieve box, the support base and the sieve box being fixedly connected by multiple damping springs; multiple discharge hoods fixedly connected to the outer wall of the sieve box; multiple filter screens with progressively decreasing pore sizes fixedly connected to the inner cavity of the sieve box; a vibrating motor fixedly installed at the bottom of the sieve box; and a flexible sealing unit, which includes a dustproof cloth for sealing the top of the sieve box. The flexible sealing unit includes an annular clamping part and a conveying part, the annular clamping part being used to fix the dustproof cloth to the sieve box. This utility model effectively prevents carbon powder from escaping from the top of the sieve box by fixing the dustproof cloth to the top of the sieve box through the annular clamping part, thereby avoiding carbon powder spillage and pollution of the working environment, and preventing workers from inhaling carbon powder. The multiple layers of filter screens with different pore sizes inside the sieve box can perform multi-stage vibrating sieving of the carbon powder.

This invention relates to the field of hot melt adhesive technology and discloses a thermally stable, high-adhesion EVA hot melt adhesive and its preparation method. This EVA hot melt adhesive is formed by heating and mixing ethylene-vinyl acetate copolymer as a base material and serpentine-modified filler as an additive. The serpentine-modified filler is obtained by modifying the surface of serpentine with a macromolecular substance having an alternating linkage structure. This macromolecular substance can interact with a compatibilizer during the heating and melting process, thus improving the interfacial compatibility between serpentine and ethylene-vinyl acetate copolymer, thereby improving the heat resistance stability of the hot melt adhesive. Furthermore, the macromolecular substance contains a rigid cyclic structure, ether bonds, and hydroxyl groups, which not only improve the adhesive properties of the hot melt adhesive but also further enhance its heat resistance stability.

This utility model relates to the field of cleaning equipment technology and discloses a surface cleaning device with a bidirectional dust-raising and sealing structure. It includes a floor brush body with an air duct suction port at its bottom. The bidirectional dust-raising and sealing structure is located at the bottom of the floor brush body and includes a forward dust-raising and sealing component and a reverse dust-raising and sealing component, both of which are in contact with the cleaning surface. The forward dust-raising and sealing component is located in front of the air duct suction port, and the reverse dust-raising and sealing component is located behind the air duct suction port. By setting forward and reverse dust-raising and sealing components on the front and rear sides of the air duct suction port respectively, the floor brush can effectively contact the cleaning surface during both forward and reverse movements, ensuring that the complete process of dust raising, sealing, and suction is completed in both directions, thus overcoming the deficiency of traditional floor brushes that only effectively clean in one direction.