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

The present invention relates to a kind of differential-type aerated deflecting bucket. It includes bucket body, and its characterized by that on the bucket body locally are set several small deflecting buckets, these small cleflecting buckets and said bucket body are identical in the slope-raising point, and the overflowing surfaces fromed from these small deflecting buckets and said bucket body are convexly-concavely alternated. Said invention also provides the working principle of said differential-type aerated deflecting bucket. Said deflecting bucket can effectively raise amount of air entrainment and can effectively protect outlet structure against cavitation erosion.

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 relates to a facility for eliminating the negative pressure of a bottom plate at a torrent diffusion slope-variable section of a flood discharging tunnel, The facility comprises a step-down floor and pressing holes, wherein the step-down floor is arranged in front of a negative pressure region of the bottom plate at a diffusion section of the flood discharging tunnel; the pressing holes are arranged at two ends of the step-down floor outside a side wall of the flood discharging tunnel; a hollow cavity formed between a jet flow surface generated by discharged water in the flood discharging tunnel flowing across the step-down floor and a step-down floor bottom plate surface is communicated with air through the pressing holes so that the negative pressure of the bottom plate of the flood discharging tunnel is reduced and partial damage of the bottom plate of the flood discharging tunnel is avoided. In general, the step-down floor height is 0.30-1.00m, and the sizes of the pressing holes are determined by factors, such as the step-down floor height, step-down floor aerating capacities, a negative pressure region range and the like. A physical model test result shows that the pressing facility provided by the invention can be used for effectively eliminating a negative pressure value of the bottom plate at the torrent diffusion section of the flood discharging tunnel, increasing water flow aerating concentration and improving the energy dissipation effect of a stilling basin.

A portable oxygen enriching device for highland respiration is composed of a face mask, an oxygen-enriching unit with a pressurizer communicated with atmosphere and a power supply (battery unit), and a buffering tube. It features that when ambient temp is lower than -18 deg.C, said battery unit can be put in the pocket of human underwear and electrically connected to the pressurizer for normal power supplying.

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 discloses a multi-channel aeration facility with a front oblique tail pier. The multi-channel aeration facility is used for eliminating water crowns behind a gate pier of a spillway of hydraulic and hydropower engineering and performing aeration protection on flow surfaces. The multi-channel aeration facility comprises the oblique tail pier and an aeration facility. The oblique tail pier and the aeration facility are arranged behind the gate pier of the spillway, the oblique tail pier is arranged at the tail of the gate pier, the aeration facility is closely connected to the rear of the section side of the oblique tail pier, and the oblique tail pier is completely coincided with an initial section side which is formed by a bottom cavity of the aeration facility. The aeration facility can be selectively in a 'flip bucket and vertical drop' combination modes, a 'flip bucket and aeration groove' combination mode and the like. The multi-channel aeration facility has the advantages that air supply channels can be increased while the water crowns behind the gate pier can be effectively eliminated, a three-dimensional aeration cavity is formed, the bottom cavity and a natural tail cavity of the oblique tail pier can be communicated with each other via the three-dimensional aeration cavity, accordingly, the aeration areas of the inside of the cavities are increased, and the water aeration quantity, an air-water ratio and a flow surface aeration concentration are also correspondingly increased; a multi-channel air feeding effect is favorable for sufficient and uniform all-section aeration, the air speeds of two side ventilation wells are reduced, and an aeration protection function of the aeration facility is further strengthened.

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 discloses an overflow weir and elastic force type stilling pool combined energy dissipation structure and an energy dissipation method. The overflow weir and elastic force type stillingpool combined energy dissipation structure comprises an overflow weir and a stilling pool, the overflow weir comprises a WES straight line section and a WES ogee section, the WES straight line sectionis connected to the WES ogee section, a rotating shaft part is arranged at the joint, a hydraulic jacking device is arranged at the bottom of the tail part of the WES ogee section, the tail part of the WES ogee section of the overflow weir is connected to the stilling pool, the stilling pool comprises a stilling pool head part, a stilling pool middle part and a stilling pool tail part, the tail part of the WES ogee section of the overflow weir is connected to the stilling pool head part, and more than one rubber support is arranged under a base plate of each of the stilling pool head part, the stilling pool middle part and the stilling pool tail part. According to the overflow weir and elastic force type stilling pool combined energy dissipation structure and the energy dissipation method, the ascending height of the hydraulic jacking device is adjusted, so that the height difference between the WES ogee section of the overflow weir and the stilling pool head part can be adjusted, thepurpose of energy dissipation can be achieved, and in the pouring process, the rubber support are arranged under the base plate of each of the stilling pool head part, the stilling pool middle part and the stilling pool tail part, so that energy dissipation can also be carried out.

The invention relates to a deformation type outward convex transition stepped energy dissipation structure and an energy dissipation method thereof. The structure comprises a front aerator, an outwardconvex transition stepped segment, a uniform stepped segment, unit blocks, hydraulic jacking devices and a controller. The front aerator, the outward convex transition stepped segment and the uniformstepped segment are sequentially arranged from the high position to the low position of an overflow dam. The outward convex transition stepped segment is uniformly divided into the multiple unit blocks, the corresponding hydraulic jacking device is mounted on the lower portion of each unit block, all the hydraulic jacking devices are controlled by a control system in a unified manner through control circuits, and the control system is used for controlling the hydraulic jacking units to drive the unit blocks to ascend and descend so as to adjust the stepped height of the outward convex transition stepped segment. According to the structure, under the action of the front aerator and the outward convex transition stepped segment, the aeration energy dissipation effect of water flow is increased to some extent, dam body safety of a flood releasing structure under different kinds of single width flow can be effectively protected, and cavitation and cavitation erosion of the overflow dam can be avoided.

A rotational flow vertical shaft flood discharge tunnel with a staggered table type volute chamber flip bucket comprises a lock chamber inlet, an upper flat section, a volute chamber, a contraction section and a vertical shaft straight section, a flow guide flip bucket is arranged on the inner side wall, close to one side of the tail end of the upper flat section in the water flow direction, of the volute chamber, and the flow guide flip bucket comprises a vertical face and a flow guide arc face intersecting with the vertical face. The rotational flow vertical shaft spillway tunnel further comprises an incoming flow aerator and a rotational flow aerator. The incoming flow aerator is formed by sudden expansion from the tail end, in the water flow direction, of the vertical wall face of the side, close to the flow guide flip bucket, of the upper flat section to the vertical face of the flow guide flip bucket, and the rotational flow aerator is formed by sudden expansion from the tail end, in the water flow direction, of the flow guide arc face of the flow guide flip bucket to the inner side wall of the volute chamber through the vertical face. The method has the effect of improving the cavitation and cavitation erosion resistance of the volute chamber and the inner side wall face of the vertical shaft straight section.

The invention relates to an aerification structure used for a stepped overflow channel, and belongs to the field of stepped overflow dams. The aerification structure used for the stepped overflow channel comprises a main air duct, an upper dispersed air duct, a lower dispersed air duct, a front aerification step and an initial step, wherein the upper dispersed air duct and the lower dispersed airduct which communicate with the main air duct are arranged on the inner side of the front aerification step and the inner side of the initial step correspondingly, and the other end of the upper dispersed air duct and the other end of the lower dispersed air duct communicate with the vertical face of the front aerification step and the vertical face of the initial step correspondingly. According to the aerification structure used for the stepped overflow channel, leaking water in the aerification step and the initial step can be discharged by means of negative pressure, and the internal temperature of concrete can be decreased, so that the surface flatness of efficiency facilities can be improved, and the early-stage strength of the concrete can be improved.