35results about How to "Increase the air concentration" patented technology

The present invention provides a method for improving the air quality in the limited space and the equipment using thereof. The said method is that the air suctioned from the limited space is transferred to the outside of the limited space and acts as an air source for making oxygen. The oxygen is extracted from the said air source and the waste gas generated thereby is directly discharged to the outside of the limited space. The oxygen extracted is transferred into the limited space and offered the said space by means of the oxygen-supply controller. In addition, the atmosphere is supplemented into the limited space when the air inside is suctioned out. The equipment for the said method includes an indoor machine positioned in the limited space, an outdoor machine and an atmosphere supplement equipment. The present invention can supplement the atmosphere into the limited space while suctioning the air from the space, and can circulate, cool (heat), dehumidify and disinfect the air in the limited space at the same time. Consequently the quality of the said air in the limited space is improved effectively and the oxygen concentration in the limited space is ensured at a prescribed range.

The invention provides a swirl shaft flood discharging tunnel with a volute chamber aerator. A side wall originally connected with a volute chamber shifts towards the center side of the volute chamberby a distance, and therefore the vertical aerator is formed in the volute chamber. When water flow passes through a step-down floor, an aerated cavity is formed, external air continuously carries outneeded gas supply on the water flow close to the wall side through the cavity, the aerated concentration of the water flow close to the wall is increased, and therefore the cavitation and cavitationerosion resistance of a whole shaft structure is greatly improved. Meanwhile, the aerated structure is far simpler than a conventional shaft aerator, and the engineering design difficulty and engineering cost can be greatly reduced. In addition, a fold line structure of the aerator replaces an original smoothly tangent structure, the engineering construction difficulty is greatly reduced, and thecavitation erosion and cavitation resistance of the connected position of the aerator and the shaft structure is improved.

The invention provides a method for aeration of a pressed inlet of a gentle slope open channel and an application device thereof. A aeration device (1) with an internal cavity communicated with the atmosphere and the cross section in a wedge shape is arranged at the tail end of the pressed inlet of the gentle slope open channel and in the pressed water body; with the wedge end facing the water flow incoming direction and the wedge bottom opposite to the water flow incoming direction, the wedge-shaped aeration device is suspended on holes bodies (4) on two sides of an overflowing hole, so that water flow flowing out of the pressed inlet is divided into an upper part and a lower part to enter the gentle slope open channel, and air in the cavity of the wedge-shaped aeration device enters a space formed by the wedge bottom, the upper water flow and the lower water flow through a vent hole (2) located at the wedge bottom of the wedge-shaped aeration device and is aerated into the water flow. The pressed inlet of the gentle slope open channel is aerated, plenty of air can be aerated once the water flow enters the open channel and be aerated to the bottom of the channel, the method has the advantage of being not subject to limitation of the gradient of a gentle slope, and the aerating corrosion-reducing effect of an overflow wall of the gentle slope open channel can be effectively improved.

The invention discloses a convenient all-weather chemical oxygenation device which comprises an oxygen inhalation tube accommodating room, a water storage room and an oxygen generating reaction room. Powdery potassium superoxide and manganese dioxide are placed in the oxygen generating reaction room; an oxygen outlet guide tube with a first switch and a water inlet tube with a second switch are arranged in the water storage room; one end of the oxygen outlet guide tube is connected with the oxygen generating reaction room, the other end of the oxygen outlet guide tube penetrates through the water storage room to be communicated with the oxygen inhalation tube accommodating room, and a retractable oxygen inhalation tube comprising an oxygen inhalation tube and a buffer tube is connected onto the oxygen outlet guide tube; the water inlet tube is communicated with the water storage room, and the quantity of water flowing into the oxygen generating reaction room is controlled via the second switch; and the oxygen inhalation tube accommodating room for accommodating the retractable oxygen inhalation tube is arranged on the water storage room, a mask is connected onto the retractable oxygen inhalation tube, an elastic band and an adjusting card are arranged on the mask, and an oxygen inhalation tube button is further disposed on the water storage room. The convenient all-weather chemical oxygenation device is simple and practical, is convenient to operate and carry, safe in use and free of any negative effects, and is unaffected by factors such as external environments, weather, time and air temperature.

The invention relates to an aeration structure and energy dissipation method of a vertical face angle and plane angle changing first level transition stair, and belongs to the field of aeration and cavitation reducing of hydraulic structures in hydraulic and hydro-power engineering. The purposes that the negative pressure is cut down and the air cavitation damage degree is reduced due to the factthat the angles of a first level vertical face stair and a plane stair of a WES overflow weir linear segment are changed freely are achieved. Through the optimization of the aspect of the first levelstair of the WES overflow weir linear segment, firstly, the negative pressure on the WES overflow weir linear segment stair is greatly reduced; secondly, the air cavitation damage degree of the WES overflow weir linear segment stair is obviously reduced; and thirdly, the whole flow state of water flow has no larger change under all levels, and it is indicated that the type of angle change does notaffect the normal flood discharge in actual engineering cases under the circumstances of cutting down the negative pressure and the air cavitation damage degree.

The invention discloses an anti-cavitation facility of a stepped overflow dam. According to the anti-cavitation facility of the stepped overflow dam, a flaring pier is used for increasing the compression capacity on the water flow, the discharged water flow is transversely contracted and vertically stretched, and the discharged water flow is ejected to the downstream. Stranded ejection water tongues aerate and collide with each other in the air, so that energy is dissipated; in addition, a flip bucket arranged at the tail of the flaring pier can lift the discharged water flow away from the overflow surface, an aeration cavity is formed. An anti-cavitation transition step is utilized to mix outside air into the cavity, so that the negative pressure at the junction of the flip bucket and thetransition step is greatly reduced, the aeration concentration in the step is improved, and the possibility of cavitation damage is reduced. The step behind the cavity happens to be the drop point ofthe front edges of the water tongues, and the friction effect of the step on the water flow is utilized to accelerate the dissipation of the step on the discharge energy; after that, a reverse arc section and a stilling basin are utilized for further energy dissipation. The anti-cavitation facility of the stepped overflow dam utilizes a combined flood discharge energy dissipation structure with section partition and region partition, cavitation damage on the overflow dam surface is reduced, and the energy dissipation rate is improved.

The invention relates to the technical field of water conservancy facilities and provides an adjustable aeration ecology landscape retaining dam which comprises an upper dam body, a middle dam body and a bottom dam body. The bottom dam body is fixed to a river bed. A height-adjustable supporting device is connected between the upper dam body and the middle dam body, and a height-adjustable supporting device is connected between the middle dam body and the bottom dam body. The height-adjustable supporting devices are electrically connected with a controller. The upper dam body comprises a first flow-passing surface which comprises a first waterways experiment station (WES) weir surface. The middle dam body comprises a second flow-passing surface, and the second flow-passing surface comprises a second WES weir surface and a first reverse curve surface. The bottom dam body comprises a third flow-passing surface, and the third flow-passing surface comprises a third WES weir surface, a first inclined surface, a second reverse curve surface, a first horizontal surface and a third reverse curve surface which are connected in sequence. According to the adjustable aeration ecology landscape retaining dam, the distances between the three dam bodies can be adjusted according to upland water conditions, accordingly the water passing condition is adjusted, and the concentration of air entrained in water is increased.

The invention relates to an alveolar-type air-entrained ridge. The purpose of the present invention is to propose a new alveolar-type air-entraining ridge, which can increase the contact area between the water tongue and the cavity, enhance the turbulent mixing effect at the lower edge of the water tongue, and increase the air volume of the ridge , to extend the protective length of the aeration sill, and it can also be used in combination with the aeration tank and the sudden drop. The technical solution of the present invention is: an alveolar-type aerated sill, which is provided with a sill body on the bottom plate of the drainage structure. For ridge and groove ridge, tooth ridge height h1>groove ridge height h2>0. The invention is suitable for aeration and corrosion reduction of drainage structures in water conservancy projects.