5results about How to "Reduce airtightness" patented technology

The utility model relates to the technical field of heat insulation wall, especially a heat insulation wall coated with radiation refrigeration coating, which comprises a wall base layer, a fixed frame arranged on the outer side of the wall base layer, an adhesive layer arranged on the inner side of the fixed frame, a phase change layer arranged on the outer side of the adhesive layer, a heat insulation layer arranged on the outer side of the phase change layer, a radiation refrigeration coating layer arranged on the outer side of the heat insulation layer, and a protective layer arranged on the outer side of the radiation refrigeration coating layer. The fixed frame is fixed on the wall base layer through the adhesive layer, the fixed frame is used to conveniently disassemble, replace and maintain the heat insulation wall surface, the radiation refrigeration coating layer effectively reflects solar radiation, reduces the temperature of the wall, the protective layer is used to protect the radiation refrigeration coating layer, the heat insulation layer increases the thickness of the wall, the phase change layer buffers the temperature change of the wall, and the stress generated by thermal expansion and cold contraction of the wall can be reduced, thereby enhancing the heat insulation effect of the wall. Moreover, the heat insulation wall can be locally disassembled and assembled, and the damaged and aged wall surface can be repaired and replaced at any time.

This invention discloses a five-layer electrodeposited high-sealing corrugated pipe based on ultrasound assistance and its preparation method, belonging to the technical field of metal corrugated pipe manufacturing. It aims to solve the problem that in multi-layer electrodeposited corrugated pipes, it is difficult to effectively coordinate current density, surface quality, and interfacial bonding strength, leading to insufficient densification of the deposited layer, unstable interlayer bonding, poor wall thickness uniformity, and failure to meet airtightness standards, ultimately resulting in poor overall performance stability. This invention includes a five-layer composite structure in which the pipe wall is composed of alternating nickel-cobalt alloy and copper layers. Each layer of the five-layer composite structure undergoes ultrasonic vibration treatment during deposition. The corrugated pipe prepared by this invention has a uniform and dense deposited layer with good interlayer bonding. The five-layer alternating deposition layer composite structure not only achieves uniform stress transmission and dispersion, effectively delaying crack propagation and interfacial penetration, but also improves the uniformity of wall thickness distribution, enabling the corrugated pipe to exhibit higher structural stability and long-term reliability in a sealed environment.

The present invention relates to a secondary battery that suppresses a decrease in the air tightness at the periphery of a filling port provided in a lid of the secondary battery. The secondary battery disclosed herein has an electrode body, a case main body, and a lid of the case main body. The lid (14) has a filling port (15), a flat annular resin gasket (60) mounted to the filling port (15), and a stopper member (50). The stopper member (50) has a sleeve (51) inserted into the filling port (15) and a flange (52) extending from the sleeve (51) toward the outer diameter direction along the outer surface (14a) of the lid (14). The resin gasket (60) is mounted to the filling port (15) and is sandwiched between the flange (52) and the outer surface of the lid. Here, a protrusion (52x) that protrudes toward the outer surface of the lid is provided at the radial middle portion of the flange (52). A restriction portion that restricts the outer edge of the resin gasket (60) is provided in the lid or the stopper member.

This utility model discloses a high-temperature bottle clamp, comprising a base, multiple holding units, a cylinder, and a metal piston. Each holding unit includes two parallel first connecting rods, one end of which is rotatably connected to the base, and gripping fingers rotatably connected to the other ends of the two first connecting rods. A support arm is provided on one of the first connecting rods. A second connecting rod is provided between the support arm and the piston. Heat-insulating guide sleeves are provided at each rotatable connection position of the first connecting rod and each rotatable connection position of the second connecting rod. The self-made cylinder with a metal piston improves heat resistance, is cheaper to manufacture, and has a longer service life. The first and second connecting rods with heat-insulating guide sleeves extend the heat transfer distance between the bottle clamping end and the cylinder. Simultaneously, the heat-insulating guide sleeves reduce heat transfer efficiency, further reducing the impact of high temperatures on the cylinder's airtightness and movement accuracy.

This invention discloses a leaf sweeping machine, relating to the technical field of leaf cleaning. It includes a vehicle body, a rotating sweeping mechanism, a sweeping head angle adjustment mechanism, and a central rotary joint air supply mechanism. A leaf collection box is located on the rear side of the vehicle body's top, with a negative pressure fan connected to its interior at the top. Negative pressure ducts connected to the leaf collection box are located on the left and right sides of the vehicle body's front end. This invention uses a rotating sweeping head mechanism and a negative pressure fan to sweep the ground, and utilizes a hot air blower to accelerate the evaporation of moisture from the leaves, breaking down the surface tension and atmospheric pressure between the leaves and the road surface caused by moisture. This reduces the airtightness between the leaves and the road surface, thereby reducing the force exerted by atmospheric pressure on the leaves adhering to the road surface, facilitating sweeping by the sweeping head. The central rotary joint, integrated inside the rotating component, solves the problem of rotating air supply, making efficient use of the sweeping head space and resulting in a simple and reliable structure.