7results about How to "Avoid accidental breakage" patented technology

The invention discloses an urban rail train traction device capable of recycling braking energy, and relates to the technical field of train traction, the urban rail train traction device comprises a mounting hanger, the middle part of the mounting hanger is rotatably connected with a buffer part, and the buffer part is provided with a coupling part in the direction away from the mounting hanger. By utilizing the friction temperature rise between the crushing pipe body and the sliding sleeve, the memory metal rod is heated to expand, the ball plug automatically opens the oil outlet pipe, and the outer wall of the crushing pipe body can be automatically and uniformly coated with lubricating oil in cooperation with the telescopic sliding of the sliding sleeve, so that the friction between the crushing pipe body and the sliding sleeve can be effectively reduced, the friction loss of the crushing pipe body is reduced, and the service life of the crushing pipe body is prolonged. Meanwhile, friction energy consumption of train operation is reduced, consumption of stored energy is reduced, more energy can be saved for other electrical systems of the train, and sufficient recycling of braking energy is facilitated.

The invention discloses a fireproof cable with a connector, and relates to the technical field of cables, the fireproof cable comprises cables, connector assemblies and a connecting piece, the two ends of each cable are fixedly provided with the connector assemblies, the two different cables are connected through the connector assemblies, the two connector assemblies are aligned, then the connecting piece is rotated to lock the two connector assemblies, and the two connector assemblies are connected through the connecting piece. The cable comprises a flame retardant pipe, the bottom of the flame retardant pipe is melted through temperature rise of a cable core, a flame retardant is extruded out through extrusion for fire extinguishing, a ventilation opening is formed in the connector assembly for ventilation, the cable core in the connector assembly can pierce the adjacent flame retardant pipe to extinguish fire through spontaneous combustion, and when the temperature of the cable core rises or spontaneous combustion occurs, the cable core can pierce the adjacent flame retardant pipe to extinguish fire. The flame retardant pipe can be melted to extinguish fire, the flame retardant can provide gaps for heat dissipation of the cable core in the flame retardant pipe, and meanwhile the situation that the flame retardant in the flame retardant pipe is sprayed out due to the fact that the cable is accidentally pressed can be prevented by taking out the flame retardant in a melting mode.

The application discloses a portable soil pollution detection tool box, which comprises a tool storage box. The tool storage box is small in overall structure, so that the soil pollution detection tool box is convenient to carry, can be used as a test tube rack, and is easy to open and close. The tool storage box is provided with a shock absorption and buffering structure, so that the test tubes are prevented from being broken accidentally. The tool storage box is provided with a push-pull structure, so that the test tubes are easy to take out. The test tubes are lighter than other detection tools, so that the tool box is convenient to carry. The tool box is provided with a C-shaped clamp and a long belt, so that the tool box can be hung on the body, and it is easy to take down and re-fix the tool box on the body.

The utility model relates to the technical field of blood sampling arm supports, and discloses a blood sampling arm support which comprises a main plate, an operation frame used for moving is fixedly installed at the bottom of the main plate, a supporting rod used for stabilizing is fixedly installed at the top of the main plate, and an adjusting arm used for controlling is fixedly installed at the top of the supporting rod. An arm support for placement is fixedly mounted at the top of the adjusting arm, a sundries box for placement is fixedly mounted at the top of the main plate, and a blood plate for storage is fixedly mounted at the top of the main plate. According to the blood sampling arm support, through cooperative arrangement of the supporting rod, the adjusting arm, the arm support body and the blood disc, the device can be more conveniently controlled during use, the device can be more stable through arrangement of the supporting rod, the height of the device can be controlled according to a patient, and through arrangement of the adjusting arm, the angle can be slightly adjusted; by arranging the arm support, the patient can feel more comfortable, and use is more convenient.

Provided are a can lid and an aluminum alloy sheet for can lid, in which even if a recycled aluminum alloy including aluminum UBC as a raw material is used, the amount of Al-Fe-Mn-based compounds and the like is reduced, and the can lid has the properties required for a can lid, such as pressure resistance and scribing strength. The can lid contains an aluminum alloy containing 0.17 to 0.40 mass% of Si, 0.23 to 0.50 mass% of Fe, 0.11 to 0.24 mass% of Cu, 0.5 to 1.0 mass% of Mn, and 0.6 to 2.7 mass% of Mg, and is characterized in that, in a plane of a panel portion defined by a rolling direction and a sheet thickness direction, the total area ratio of Al-Fe-Mn-based compounds and Mg2Si-based compounds is 2.5% or less, and in a sheet thickness central portion of a plane of the panel portion orthogonal to the rolling direction, the area ratio of grains having a circle equivalent diameter of 2 μm or more is 70% or more.

The present invention belongs to the field of electromagnetic shielding technology, and specifically relates to a PTFE electromagnetic shielding material and its preparation method and application. The PTFE electromagnetic shielding material is a three-layer sandwich structure, the upper layer and the lower layer are both polytetrafluoroethylene conductive microporous membrane layers, the middle layer is a conductive layer, the polytetrafluoroethylene conductive microporous membrane layer includes PTFE resin, reinforcing material and conductive material, the conductive layer includes thermoplastic resin and conductive material, and the density of the PTFE electromagnetic shielding material is 0.55-0.80g / cm 3 , strength ≥ 25MPa, elongation at break ≥ 290%, volume resistivity ≤ 0.015Ω.cm, shielding effectiveness ≥ 80db. The PTFE electromagnetic shielding material of the present invention has good electrical conductivity and mechanical strength, a large amount of conductive material filling and is not easy to fall off, and the PTFE electromagnetic shielding material of the present invention also has good softness, sealing, acid and alkali resistance, wear resistance and high temperature resistance.

This utility model relates to the field of battery cell cap technology, and discloses a high-safety cylindrical composite cap, including a top cover, an explosion-proof sheet, a sealing assembly, a positive electrode connecting piece, an insulating pad, and an insulating isolation plate and a buffer pad for preventing internal short circuits of the battery cell. The top cover is located at the top, the explosion-proof sheet is located below the top cover and is fixedly connected to the top cover, and the sealing assembly is located below the explosion-proof sheet and fits tightly with the outer shell of the cylindrical battery. This high-safety cylindrical composite cap uses a sealing assembly including a rubber sealing ring and an elastic metal sealing ring. The sealing ring is tightly fitted onto the top edge of the cylindrical battery shell, effectively filling the tiny gaps between the shell and the cap. The sealing ring is located above the sealing ring and fits tightly with the explosion-proof sheet. The elasticity of the metal further enhances the sealing effect, effectively preventing external moisture and impurities from entering the battery, avoiding performance degradation and shortened lifespan due to contamination, and also preventing leakage of electrolyte inside the battery.