50results about How to "Exhale smoothly" patented technology

The invention discloses a manufacturing method of a sand leaking preventing and heat preserving feed head of a sand casting and a special die of the manufacturing method. The manufacturing method is that a sand leakage preventing platform is arranged between a feed head die seat and a feed head air outlet bar, and the bottom part of the sand leakage preventing platform completely covers a feed head air outlet hole in the top part of a feed head heat preserving sleeve which is used in match with the feed head die seat; when manufacturing the feed head, a space formed by the feed head air outlet bar is used as a sand air outlet hole, the space formed by the sand leakage preventing platform is used as a transition exhausting chamber, and the space formed by the feed head die seat is used as a casting solution compensating contraction chamber; the feed head heat preserving sleeve is embedded into the casting solution compensating compaction chamber; the feed head air outlet hole in the top part of the feed head heat preserving sleeve is completely staggered with the sand air outlet hole in the vertical direction, namely, the casting solution compensating compaction chamber, the transition exhausting chamber and the sand air outlet hole can communicate by curved lines in a circuitous way. The manufacturing method has the advantages that the optimal structural design and layout ensures smooth exhausting from the prepared feed head, and casting sand which is loosened by vibrating can be prevented from entering a cavity of a casting body, and therefore, the defect due to sand inclusion of the casting can be effectively decreased, and the casting quality can be greatly improved.

The invention provides an aeration device for treating domestic sewage. The aeration device comprises a water tank, an air heater and a driving structure, a plurality of aeration pipes are erected at the bottom of the water tank, the aeration pipes are obliquely arranged and incline downwards towards one side of a discharge pipe of the water tank, the other ends of the aeration pipes protrude out of the water tank and are all communicated with a collecting pipe, and the collecting pipe is communicated with an air outlet of an air heater; a plurality of air outlet holes are formed in the aeration pipes, cleaning structures are mounted in the aeration pipes, one ends of the cleaning structures protrude out of the inclined bottom ends of the aeration pipes and are in transmission connection with a driving structure, and the driving structure drives the cleaning structures in the aeration pipes to move, so that the air outlet holes of the aeration pipes are cleaned, and anti-blocking is realized; a relatively appropriate temperature can be provided for microorganisms in sewage by adopting a hot air supply effect, so that the activity is improved, and the reaction is accelerated; moreover, the air outlet holes can be prevented from being blocked, impurities are prevented from remaining in the aeration pipe, smooth ventilation and air outlet are maintained, and the aeration efficiency is improved.

A casting mold for fabricating slender oil pipe type castings comprises an upper sand mold, a lower sand mold, a sand core, an air-out structure, and a fixation structure. The air-out structure comprises a sand core interior air passage arranged in the sand core and a sand mold interior air passage arranged in the lower sand mold. The sand core interior air passage is arranged in a length direction of the sand core, and the sand mold interior air passage is arranged in a length direction of the lower sand mold. The fixation structure comprises a ventilating connecting rod. An upper end of the ventilating connecting rod passes through a via hole in the lower sand mold and a standard core hole of the sand core and into a sand filling area to be hermetically connected with the other end of the sand core interior air passage, and a lower end of the ventilating connecting rod is hermetically connected with one end of the sand mold interior air passage. In the invention, the fixation structure is arranged as a hollow air-out chamber, thereby achieving smooth air discharge from the oil pipe sand core under the premise of satisfying molding sand thicknesses of a side surface of an oil pipe and a lower core head of the lower sand mold, fundamentally solving the problems of fixation and air discharge of the slender sand core, and greatly lowering the casting difficulty of castings of such a structure.

The invention discloses a compensation type ventilator oxygen supply method and the ventilator, wherein the compensation type ventilator oxygen supply method comprises the following steps: when inhaling, the main oxygen supply pipeline and the auxiliary oxygen supply pipeline work at the same time; , stop the oxygen supply of the main oxygen supply pipeline and the auxiliary oxygen supply pipeline, and resume the oxygen supply of the auxiliary oxygen supply pipeline when the exhalation weakens; when inhaling, open the main oxygen supply pipeline, and the main oxygen supply pipeline and the auxiliary oxygen supply pipeline work at the same time. The ventilator oxygen supply method in the present invention and the ventilator provide a small amount of oxygen in the second half of exhalation by setting the auxiliary oxygen supply pipeline, which is used to make up for the oxygen required by the user during the lag time of the ventilator inducing the inhalation airflow To avoid the situation that the user should be struggling to inhale due to the lag of inhalation and oxygen supply, and to give the user a better breathing experience.

The invention discloses an improved structure of a molecular sieve, belongs to an oxygenerator air filtering device, and aims to provide a molecular sieve used for improving air filtering quality and prolonging the service life of a piece of a filtering paper. The improved structure comprises a top cover and a bottom cover which are arranged on the two ends of the screen drum and are tightened by a threaded rod, an air outlet nozzle fixed on the top cover, an air inlet nozzle fixed on the bottom cover, a filtering material filled in a screen drum, filtering plates arranged above and below the filtering material, and multiple pieces of filtering papers arranged on the surfaces of the filtering plates, wherein a lining (8) is arranged between the piece of filtering paper (3) positioned below the filtering material (5) and the bottom cover (10), a spring (2) is arranged between the piece of filtering paper (3) positioned above the filtering material (5) and the top cover (12), and the top cover (12) and the bottom cover (10) are both provided with sealing rings (11). The improved structure provided by the invention has the advantages that the density of the filtering material is controlled, smooth ventilation is also guaranteed, and the improved structure is the oxygenerator air filtering device.

The invention discloses a hidden mask for a yarn production workshop worker. The hidden mask comprises U-shaped buckles and sponge bodies, and the buckles and the sponge bodies are fixedly connected.The sponge bodies are in a disc shape. Each sponge body is provided with a door and a through hole, wherein the edge of the door and the inner wall of the through hole are connected into a whole through connecting parts. The upper surfaces of the sponge bodies are attached to nostril cavities of nostrils. The lower surfaces of the sponge bodies are arranged outdoors, the connecting parts are arranged at the positions of the lower surfaces, and the U-shaped buckles and the edge of the nose are clamped and connected. The hidden mask has the following beneficial effects that the hidden mask adopted in the device is small in size and convenient to wear; secondly, according to the provided mask, breathing is relatively smooth; and thirdly, compared with a traditional mask, the hidden mask is good in fly fluff filter effect.