5results about How to "Smooth inner wall" patented technology

The invention discloses an orifice pipe imbedding method and an inflatable bag under a deepwater condition, and relates to the field of orifice pipe imbedding, and the method comprises the following steps: S1, construction preparation: placing a drilling machine and construction equipment in place, entering constructors and assembling the construction equipment; s2, a hole position is determined, specifically, a diver enters the water to observe a deposition layer of the underwater part of the drilling area and determine the hole position; s3, drilling is started, and a drill rod with a drill bit is lowered from the water surface platform to the hole site section by section for drilling; s4, air bag inflation and drilling grouting are conducted, all drill rods are pulled up, core samples are checked to determine the geological condition of the stratum of the section, a drill bit is replaced, the air bag is used, an arc-shaped groove is formed, the physical contact area and friction force between the air bag and the external hole wall are increased, the functionality of the air bag in underwater drilling grouting application is improved, and the service life of the air bag is prolonged. The reliability and the safety of the air bag in the using process are further enhanced, and meanwhile the auxiliary mechanism can enable the air bag to be expanded more smoothly, stably and evenly.

The invention provides a prefabricated concrete radiation cooling ventilation external wall panel. The prefabricated concrete radiation cooling ventilation external wall panel comprises a prefabricated concrete radiation cooling ventilation external wall panel outer acanthus, a prefabricated concrete radiation cooling ventilation external wall panel inner acanthus, a grating, outer acanthus stiffening ribs and a cover plate, the prefabricated concrete radiation cooling ventilation external wall panel outer acanthus and the prefabricated concrete radiation cooling ventilation external wall panel inner acanthus are connected through a plurality of outer acanthus stiffening ribs to form a ventilation air duct; a cover plate is arranged at the upper end of the ventilation air duct; a grating is embedded in the upper part of an outer acanthus of the prefabricated concrete radiation cooling ventilation externally-hung wallboard; the sleeve connecting piece is pre-buried in an inner leaf plate of the prefabricated concrete radiation cooling ventilation external wall plate, and the prefabricated concrete radiation cooling ventilation external wall plate is installed on a main body structure and spliced to a parapet wall from the bottom layer of the main body structure. The invention relates to the technical field of fabricated buildings, and can solve the problems that in the prior art, an external wall additional heat preservation layer is prone to cracking, falling off and water seepage, and a double-layer ventilation curtain wall is high in cost and limited in use.

The application relates to the field of heat exchangers, in particular to a pure counterflow heat exchanger for tube and shell processes, which comprises a front-end tube box, a tube process inlet is fixedly communicated with the outer wall of the top end of the front-end tube box; a fixed tube plate is fixedly communicated with the right end of the front-end tube box; a shell process cylinder is fixedly communicated with the right end of the fixed tube plate, a shell process inlet is fixedly communicated with the top of the right end of the shell process cylinder, a shell process outlet is fixedly communicated with the bottom of the left end of the shell process cylinder; a rear-end tube box is fixedly communicated with the right end of the shell process cylinder; the tube process inlet is arranged at the left end and the tube process outlet is arranged at the right end, so that the same fixed tube plate is prevented from being simultaneously contacted with the inlet medium and the outlet medium and from having an excessively large temperature difference, the heat exchange effect is improved, an expansion joint is further arranged, the tube bundle can freely stretch and shrink along the axial direction, and the axial stress between the tube process and the shell process is reduced.

This invention discloses an engine intake mechanism, an engine system, and a vehicle, belonging to the field of engine technology. The engine intake mechanism of this invention makes the inner wall of the airflow guide passage smoother; in other words, there are no geometric abrupt changes in the inner wall of the airflow guide passage. This reduces flow losses in the airflow guide passage, resulting in smaller variations in airflow velocity. Consequently, the airflow pressure and velocity at the turbocharger inlet are more uniform, improving aerodynamic efficiency and thus increasing boost efficiency. The engine system and vehicle of this invention, by applying the aforementioned engine intake mechanism, can improve the engine system's power performance and fuel economy, and enhance the driving experience.