The left-falling stroke mud spoon that is used for air-floatation water purifier
Technical field
The present invention relates to a kind of sewage disposal device, especially a kind of left-falling stroke mud spoon that is used for air-floatation water purifier.
Background technology
In air-floatation water purifier, the flotation body constantly floats, and concentrates gradually near the body water surface of pond and forms scum silica frost (mud).Scum silica frost must in time be removed, so slag discharging device need be set.Up to now, domestic traditional rectangle air-floatation water purifier adopts chain type to push away the mud machine always---weir plate formula slag discharging device, see Fig. 1.
The principle of work of this slag discharging device is as follows:
End at water purifier rectangle pond body 18 is provided with sludge bucket 22 (overwhelming majority is arranged on an end of water purifier water port), and sludge bucket 22 separates by water body in weir plate 23 and the pond body 18.Chain type pushes away mud machine 19 and utilizes the some mud pushing plates that are fixed on two parallel chains that near the scum silica frost of the certain depth water surface is passed to sludge bucket 22 directions continuously.The height of weir plate 23 can be regulated.Can regulate the degree of depth that mud pushing plate gos deep into scum layer by the height of regulating weir plate 23, certainly, must regulate the elevation of water surface in the water purifier pond body 18 simultaneously, make it to be substantially equal to the height of weir plate 23, must make promptly that the last plane of the water surface and weir plate 23 is in the same plane substantially in the pond.The adjusting of water purifier pond body 18 median water level can realize by the valve amount of opening of regulating water purifier water-in 20, water outlet 21 simply, but water level is very unstable.Cause the unsettled reason of water level to be, the discharge capacity of trade effluent constantly changes often, so the water level in the water collecting basin constantly changes.The continuous variation of water collecting basin median water level causes that the sewage pump draught head that supplies water to water purifier constantly changes, and the discharge capacity of sewage pump constantly changes thereupon.Though the valve amount of opening of water purifier water inlet, water port has certain restraining effect to this variation, because the valve drag characteristic is non-linear, can not eliminate this variation fully, so the water level in the water purifier pond constantly changes, change is also bigger sometimes.
The continuous change of water purifier pond median water level can make the work of this slag discharging device very unstable: water level is crossed when hanging down, and scum silica frost can not in time be got rid of; And when water level was higher than on the weir plate plane, water can overflow enter sludge bucket, and the mud solid content of handling out is significantly reduced.
Basicly stable in order to guarantee water purifier pond median water level, the volume that need increase water collecting basin significantly is with the variation of the buffering water yield, the change of water collecting basin median water level is controlled in certain scope, so increased construction investment and floor space.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of left-falling stroke mud spoon that is used for air-floatation water purifier is provided, the purification rate of water purifier is improved significantly.
According to technical scheme provided by the invention, the setting that is centrosymmetric of two blades that roll into the half cone mesa shaped, the rotational trajectory of two blades becomes frustum, forms between blade and rotational trajectory and casts aside angle β, has angle λ between the long limit of two blades; The small end of blade is provided with little end socket, and big end is provided with big end socket; Center at little end socket has circular hole, and described circular hole is communicated with the mud pipe that falls, and is provided with the support roller raceway on the mud pipe that falls; Be provided with the 3rd gusset between two blades, described the 3rd gusset is along the diametric(al) setting of circular hole on the little end socket; Two ends up and down at the 3rd gusset are respectively equipped with second gusset, and described second gusset is connected with first gusset, and described first gusset and second gusset center on the circumferential direction setting of circular hole on the little end socket; Be installed with spindle nose on big end socket, spindle nose links to each other with step-down gear, and step-down gear is connected with variable-frequency motor.
At the mud pipe arranged outside sludge bucket that falls, the sludge bucket bottom is provided with evacuated tube.
The axial line of the frustum of two blade formation tilts to the mud Guan Yiduan that falls, and has inclined angle alpha between horizontal plane; The semi-cone angle of the frustum of two blade formation is α.
On blade, longitudinally and radially be provided with the support muscle.
Described big end socket one end utilizes the mount pad of step-down gear to be fixed on the pond body gusset of water purifier pond body sidewall.
Be fixed with roller frame on the pond body gusset of described water purifier pond another sidewall of body, two support rollers are installed on roller frame, the support roller raceway that the support roller utilization falls on the mud pipe is held little end socket one end.
The present invention has fully eliminated under the deslagging to stream, and the height of water purifier pond body can obviously reduce, the decline that steel consumption and cost are bigger thereupon.To the elimination of stream, the purification rate of water purifier is improved significantly under the deslagging.The present invention is not high to the stability requirement of water purifier pool inner water position, and water level change within the specific limits the scum silica frost solid content of handling out is had certain influence, but influence is little to the not influence of stability of deslagging.So can reduce the volume of water collecting basin significantly, construction investment and floor space descend.
Description of drawings
Fig. 1 is the weir plate formula slag discharging device fundamental diagram of prior art.
Fig. 2 is a structural representation of the present invention.
Fig. 3 is the A-A sectional view of Fig. 2.
Fig. 4 is the B-B sectional view of Fig. 2.
Fig. 5 is the C-C sectional view of Fig. 2.
Embodiment
The invention will be further described below in conjunction with concrete drawings and Examples.
As Fig. 2~shown in Figure 5: cast aside the mud spoon and comprise blade 1, little end socket 2, big end socket 3, first gusset 4, second gusset 5, the 3rd gusset 6, the mud pipe 7 that falls, sludge bucket 8, evacuated tube 9, roller frame 10, support roller 11, support roller raceway 12, spindle nose 13, step-down gear 14, variable-frequency motor 15, water purifier pond body 16, pond body gusset 17 etc.
The present invention adopts the setting that is centrosymmetric of two blades 1 that roll into the half cone mesa shaped, and the rotational trajectory of two blades 1 becomes frustum, forms between blade 1 and rotational trajectory and casts aside angle β, has angle λ between the long limit of two blades 1; On blade 1, longitudinally and radially be provided with support muscle 18; The small end of blade 1 is provided with little end socket 2, and big end is provided with big end socket 3; Center at little end socket 2 has circular hole, and described circular hole is communicated with the mud pipe 7 that falls; Be provided with the 3rd gusset 6 in 1 in two blades, described the 3rd gusset 6 is along the diametric(al) setting of circular hole on the little end socket 2; Be respectively equipped with second gusset 5 at the two ends up and down of the 3rd gusset 6, described second gusset 5 is connected with first gusset 4, and described first gusset 4 and second gusset 5 center on the circumferential direction setting of circular hole on the little end socket 2; Be installed with spindle nose 13 on big end socket 3, spindle nose 13 links to each other with step-down gear 14, and step-down gear 14 is connected with variable-frequency motor 15; Big end socket 3 one ends utilize the mount pad of step-down gear 14 to be fixed on the pond body gusset 17 of water purifier pond body 16 sidewalls; Be fixed with roller frame 10 on the pond body gusset 17 of water purifier pond body 16 another sidewalls, two support rollers 11 are installed on roller frame 10, support roller 11 utilizes the support roller raceway 12 on the mud pipe 7 that little end socket 2 one ends are held; At the mud pipe 7 arranged outside sludge buckets 8 that fall, sludge bucket 8 bottoms are provided with evacuated tube 9;
The axial line of the frustum of two blade 1 formation tilts to an end of the mud pipe 7 that falls, and has inclined angle alpha between horizontal plane; The semi-cone angle of the frustum of two blade 1 formation is α.
Principle of work of the present invention: the blade 1 (general n<13rpm) that rotatablely moves slowly, when a blade 1 rotatablely moves the below, the left-falling stroke of level is gone in the scum layer in the water purifier pond body 16, casts aside the degree of depth and can regulate by the elevation of water surface in the equalizing tank within the specific limits.Because there is angle λ in the long limit of blade 1, so blade 1 is what little by little to cast aside into scum layer.Blade 1 is at first cast aside into scum layer at big end socket 3 one ends, and this helps prolonging the time that the scum silica frost of having cast aside flows into mud pipe 7.Because blade 1 is what little by little to cast aside into scum layer, has added and cast aside angle β, so it is minimum to the disturbance of scum layer and water body to cast aside the mud process.The scum silica frost of having cast aside is along with the rotation of blade 1, and the internal surface along blade 1 compiled under action of gravity in the groove shaped flow conduits that is made of first gusset 4, second gusset 5, the 3rd gusset 6 before this.Because groove shaped flow conduits is downward-sloping toward mud pipe 7 one ends that fall, flow to the mud pipe 7 that falls simultaneously under action of gravity so compile the scum silica frost of runner, enter mud pipe 7 by the perforate on the little end socket 2, finally fall into sludge bucket 8 and discharge.The numerical value of described angle beta and α and λ is all less than 20 degree.