3results about How to "Prevent pressure buildup" patented technology

This invention relates to the field of resistance furnace technology, specifically a box-type resistance furnace for diesel fuel ash content testing. It includes a furnace body and a furnace door mounted on the furnace body. A covered ash dish is placed inside the furnace body. The device also includes a two-stage locking mechanism on both the furnace body and the furnace door. This mechanism locks the furnace door with a slight gap before fully closing it. By using the two-stage locking mechanism, the furnace door is first locked in a gap-free state to allow gas to escape and prevent pressure buildup, and then locked in a fully closed state to ensure airtightness and improve testing accuracy. Furthermore, under the action of a linkage mechanism, closing the furnace door causes the deflector tray and covered ash dish to rotate into the furnace, reducing manual interference. When the furnace door is fully closed, the covered ash dish is automatically opened, fully exposing the sample and ensuring reliable and standardized testing. The entire process involves few steps and is simple and convenient.

This application provides an exhaust structure, a battery pack housing, a battery pack, and an electrical device, relating to the field of battery technology. The exhaust structure is disposed in the exhaust channel of the battery pack housing and includes a pipe body and a phase change element. The pipe body includes a gas passage and a accommodating cavity separated from each other. The gas passage allows exhaust gas to flow through, and the accommodating cavity surrounds at least a portion of the outer periphery of the gas passage; the phase change element is located in the accommodating cavity. In the exhaust structure provided by this application, when high-temperature smoke passes through the gas passage, heat is uniformly conducted to the phase change element through the pipe body wall. The phase change element reduces the temperature of the high-temperature smoke, making it easier for the smoke to condense and settle, thus reducing visible smoke. Simultaneously, after thermal runaway smoke flow, the phase change element recovers to a solid state through natural cooling or active cooling, enabling reuse and improving the service life of the exhaust structure.

This utility model relates to the field of fluid control technology, specifically a valve body with a spacer structure, including a valve body and a valve core. The valve core is slidably connected within the valve body, and multiple sealing rings are spaced apart on the outer circumferential surface of the valve core. The sealing rings abut against the inner wall of the valve body, and spacers are provided between adjacent sealing rings. The outer diameter of the spacers is smaller than the outer diameter of the sealing rings and does not fit against the inner wall of the valve body. The spacers include a first flange, a second flange, and a rib group located between the first and second flanges. The first and second flanges abut against adjacent sealing rings, respectively. The rib group includes a first rib and a second rib, which are staggered and form a hollow section between them. A gap is formed between the spacer and the inner wall of the valve body. The sealing rings expand and fill the gap when subjected to axial pressure. This structure effectively inhibits sealing ring deformation, extends service life, and ensures unobstructed fluid flow.