CN113617243A - Agitating unit and have device's flocculation equipment for sewage treatment - Google Patents
Agitating unit and have device's flocculation equipment for sewage treatment Download PDFInfo
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- CN113617243A CN113617243A CN202111094218.4A CN202111094218A CN113617243A CN 113617243 A CN113617243 A CN 113617243A CN 202111094218 A CN202111094218 A CN 202111094218A CN 113617243 A CN113617243 A CN 113617243A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Mixers Of The Rotary Stirring Type (AREA)
Abstract
The application discloses a stirring device for sewage treatment, which comprises a driving part, a stirring shaft and an impeller, wherein the impeller is concentrically and fixedly arranged on the stirring shaft, and the driving part is suitable for driving the stirring shaft to rotate in a reciprocating manner; the driving component comprises a rotary power source, a driving mechanism, a driving shaft, a shell and an energy storage mechanism, the unidirectional rotation of the rotary power source is suitable for driving the driving shaft to rotate forwards or backwards through the driving mechanism, and the driving shaft is concentrically and fixedly connected with the stirring shaft; the energy storage mechanism is provided with two energy storage mechanisms which are suitable for storing energy by respectively utilizing the positive rotation and the reverse rotation of the driving shaft, and the energy storage mechanisms are suitable for releasing energy when the driving shaft is converted from the positive rotation to the reverse rotation or from the reverse rotation to the positive rotation. Has the advantages of full stirring, good mixing effect, good flocculation effect, reliable structure, stable operation and low cost.
Description
Technical Field
The application relates to the field of sewage treatment, in particular to flocculation equipment.
Background
In recent years, the discharge amount of industrial sewage and domestic sewage in China is a trend of increasing year by year, and the sewage which is not treated or cannot be treated properly is directly discharged into the nature, so that the environmental sanitation is seriously influenced, and the water safety of people is threatened. In order to meet the water quality requirement of discharging the sewage into a certain water body or reusing the sewage, the sewage needs to be purified, and the process is sewage treatment. Sewage treatment is becoming an increasingly important link in environmental protection.
In sewage purification treatment, generally need introduce the flocculation basin to sewage in, add medicaments such as flocculating agent, the rethread mixer stirs, flocculating agent and sewage intensive mixing under the effect of mixer for dispersed solid particle can flocculate and form the flocculation thing together in the sewage, and then makes the suspended particles in the sewage gather the grow, and the particle is depositd with higher speed, realizes the separation of sewage and flocculation thing.
However, the conventional flocculation agitator always rotates in one direction, so that the flow of the sewage in the flocculation tank also rotates in one direction. The above stirring method generally has two problems: (1) the common stirring mode can generate axial circulation and also form a part of ineffective circulation, so that the mixing effect of the flocculating agent and the sewage to be treated is poor, the suspension effect of solid particles is poor, and the flocculation efficiency is low; (2) the impeller of mixer can produce the shearing action to the flocculation thing when the stirring, and when the continuous unidirectional rotation of mixer moved, the impeller probably cut off, cuts up the flocculation thing, also can lead to solid particle to deposit inadequately, and especially to the general microbial flocculant of flocculation effect, above-mentioned effect of cutting off is more obvious.
Therefore, it is an urgent need for those skilled in the art to improve the existing flocculation stirring machine to overcome the above problems.
Disclosure of Invention
An aim at of this application provides a agitating unit for sewage treatment that the stirring is abundant, and the mixing effect is good, and flocculation effect is good, and the structure is reliable, and the operation is stable, with low costs.
Another object of the present application is to provide a flocculation apparatus having the above reciprocating type stirring apparatus for sewage treatment.
Still another object of the present application is to provide an incomplete gear driving mechanism with simple structure, stability, reliability and low cost.
In order to achieve the above purposes, the technical scheme adopted by the application is as follows: the utility model provides an agitating unit for sewage treatment, includes driver part, (mixing) shaft and impeller, the impeller concentric fixed set up in on the (mixing) shaft, driver part is suitable for the drive the (mixing) shaft reciprocating rotation.
The driving part comprises a rotary power source, a driving mechanism, a driving shaft, a shell and an energy storage mechanism, the unidirectional rotation of the rotary power source is suitable for driving the driving shaft to rotate forwards or backwards through the driving mechanism, and the driving shaft is concentrically and fixedly connected with the stirring shaft, so that the reciprocating rotation of the stirring shaft is realized.
The energy storage mechanism is provided with two energy storage mechanisms which are suitable for storing energy by respectively utilizing the positive rotation and the reverse rotation of the driving shaft, and the energy storage mechanisms are suitable for releasing energy when the driving shaft is converted from the positive rotation to the reverse rotation or from the reverse rotation to the positive rotation and are used for providing torque for the reverse rotation or the positive rotation of the driving shaft.
Preferably, the driving mechanism is an incomplete gear driving mechanism, the driving mechanism includes a driving bevel gear, a first driven bevel gear and a second driven bevel gear, the driving bevel gear is provided with continuous bevel gear sections and non-gear sections, the rotary power source is suitable for driving the driving bevel gear to rotate, the first driven bevel gear and the second driven bevel gear are respectively and fixedly arranged on the driving shaft concentrically, the first driven bevel gear and the second driven bevel gear are arranged at intervals and have opposite tooth surfaces, and the driving bevel gear is located between the first driven bevel gear and the second driven bevel gear; the one-way rotation of the driving bevel gear enables the bevel gear section to alternately engage with the first driven bevel gear and the second driven bevel gear, and further drives the driving shaft to rotate in a reciprocating manner.
Preferably, the energy storage mechanism comprises a fixed joint, a movable joint, a clockwork spring and a one-way driving assembly, the fixed joint is fixed on the shell, the one-way driving assembly is arranged between the driving shaft and the movable joint, one end of the clockwork spring is fixedly connected with the fixed joint, and the other end of the clockwork spring is fixedly connected with the movable joint; when the driving shaft rotates towards one direction, the driving shaft is suitable for driving the movable joint to rotate through the one-way driving assembly, the clockwork spring is enabled to be twisted and deformed to realize energy storage, and when the driving shaft rotates towards the other direction, the movable joint is kept static.
The spiral directions of the clockwork spring on the two energy storage mechanisms are opposite, the stopping directions of the one-way driving assemblies on the two energy storage mechanisms are opposite, and the spiral direction of the clockwork spring on the same energy storage mechanism is the same as the stopping direction of the one-way driving assembly.
The energy storage mechanism with the structure has the advantages of simple structure, compact layout and convenience in installation, and due to the arrangement of the one-way driving assembly, the two energy storage mechanisms can work independently and can respectively store energy and release elastic potential energy.
Preferably, the one-way driving assembly is an inner-meshing ratchet mechanism, the one-way driving assembly comprises a ratchet wheel, a pawl and a reset elastic sheet, the ratchet wheel is rotatably arranged on the shell, the ratchet wheel and the driving shaft are concentrically arranged, an installation groove is formed in the driving shaft, the pawl is rotatably arranged in the installation groove, the reset elastic sheet is arranged between the pawl and the driving shaft and forces the pawl to rotate outwards, the ratchet wheel is provided with internal teeth, and the pawl abuts against the internal teeth; the movable joint is fixedly arranged on the ratchet wheel. The inner engaged ratchet mechanism is a common one-way driving mechanism and has the advantages of simple structure, convenient installation and stable operation; and the installation groove is arranged, so that the integral structure of the one-way driving assembly is more compact, and the integral volume of the driving part is reduced.
Furthermore, an annular track is fixedly arranged on the shell, a plurality of T-shaped slide rods extend out of the ratchet wheel, the T-shaped slide rods are distributed at intervals along the circumferential direction, and the ratchet wheel is arranged in the annular track in a sliding mode through the T-shaped slide rods and is connected with the shell in a rotating mode; one T-shaped sliding rod is suitable for serving as the movable joint and is fixedly connected with the clockwork spring. The device has compact structure, convenient installation, stability and reliability.
Preferably, the transmission ratio of the driving bevel gear to the first driven bevel gear and the transmission ratio of the driving bevel gear to the second driven bevel gear are both I, I is 2: 1; the bevel gear section of the driving bevel gear is arranged in a range of 180 degrees, and the reciprocating rotation angle of the first driven bevel gear and the reciprocating rotation angle of the second driven bevel gear are 90 degrees. The parameter setting can meet the requirement of stirring parameters and is convenient to process.
Furthermore, the tooth surfaces of the first driven bevel gear and the second driven bevel gear are both arranged in a range of 90 degrees, the tooth surface of the first driven bevel gear and the tooth surface of the second driven bevel gear are staggered by one tooth, a first tooth and a penultimate tooth on the tooth surface of the first driven bevel gear are missing, a second tooth and a last tooth on the tooth surface of the second driven bevel gear are missing in the same direction, the missing positions of the first driven bevel gear and the second driven bevel gear correspond, and a first tooth and a last tooth on the bevel tooth section of the driving bevel gear are missing. The arrangement of the missing teeth is to ensure that the driving shaft is smoother when the forward rotation and the reverse rotation are switched, and unnecessary interference and pause are avoided.
Preferably, a connecting sleeve is concentrically and fixedly arranged between the first driven bevel gear and the second driven bevel gear, and the driving shaft is suitable for entering the connecting sleeve to realize concentric and fixed connection with the first driven bevel gear and the second driven bevel gear. The connection mode is simple and reliable and is convenient to process.
Preferably, the impeller comprises a shaft sleeve and two blades, the shaft sleeve is suitable for being fixedly connected with the stirring shaft, and the two blades are arranged on the shaft sleeve in an angle of 180 degrees; the cross section of each blade is in an isosceles triangle structure, each blade comprises a bottom surface and two waist surfaces, each waist surface is in an inwards concave arc structure, and the junction of the bottom surface and the waist surfaces is in an outwards convex fillet structure; the blades taper from root to tip.
The impeller of the structure enables the stirring device to generate larger circulation amount under the condition of the same power consumption. Specifically, the impeller with the structure is matched with the reciprocating rotation of the stirring shaft, and the effect of the impeller is equivalent to that the axial flow impeller in opposite directions alternately rotates forwards and backwards, so that materials in the tank alternately flow in the oblique upper or oblique lower direction. Wherein arc structure and original paper structure can also increase the area of contact with the flocculation thing, reduce the pressure to the flocculation thing, further avoid the impeller to cut off, cut up the flocculation thing.
Furthermore, the number of the impellers is two, the impellers are arranged on the stirring shaft at intervals, and the two impellers are arranged in a 90-degree crossed manner. The arc-shaped structures of the double impellers are arranged in a crossed manner and matched with the waist surface, so that different upper and lower circulating flow fields (namely axial circulation) can be formed, a three-dimensional flow field is formed in the axial direction, and a better mixing effect is achieved.
As the application, the application provides a flocculation equipment, including the flocculation basin, be provided with agitating unit for sewage treatment in the flocculation basin.
Compared with the prior art, the beneficial effect of this application lies in: the reciprocating type stirring design of the scheme mainly has the following three functions: (1) the method can reduce unnecessary circular flow, ensure the strength of axial circulation, enable solid particles to be better suspended, ensure the mixing effect of the flocculating agent and the sewage to be treated, and improve the flocculation efficiency; (2) continuous shearing of flocs in the same direction during unidirectional rotation stirring can be avoided, and further the occurrence of the condition of crushing the flocs is reduced, so that better flocculation effect is obtained by flocculation equipment, and particularly, reciprocating stirring design is more necessary for some microbial flocculants with common flocculation effect; (3) the flocculation whirl can be eliminated, the excessive entanglement of the flocs on the impeller during the traditional unidirectional rotary stirring is avoided, the stirring effect is further improved, and the shafting stability of the stirring device is ensured.
In addition, the existing stirring device generally adopts a servo motor as a rotary power source, and the power required by the stirring motor in the sewage treatment field is often larger. If the stirring shaft is driven to rotate in a reciprocating manner by the forward rotation and the reverse rotation of the motor, the requirement on the motor is extremely high, the manufacturing cost of the stirring device can be greatly increased, and the service life of the motor is difficult to guarantee. Therefore, the driving part of the scheme is also provided with the driving mechanism between the rotary power source and the driving shaft, the driving mechanism converts the unidirectional rotation of the rotary power source into the reciprocating rotation of the driving shaft, the burden of the rotary power source is greatly reduced, the manufacturing cost of the stirring device can be reduced, the stirring device can stably and reliably run, and the service life of the stirring device is ensured.
Finally, the energy storage mechanism is arranged, so that the driving shaft is smoother and more continuous when the forward rotation and the reverse rotation are converted, unnecessary pause and clamping stagnation are avoided, and the impact of the driving mechanism on the rotary power source is also reduced.
Drawings
Fig. 1 is a perspective view of a preferred embodiment according to the present application.
Fig. 2 is an exploded view of a preferred embodiment according to the present application.
Fig. 3 is a half sectional view of a preferred embodiment according to the present application.
Fig. 4 is a schematic perspective view of a drive member according to a preferred embodiment of the present application (housing not shown).
FIG. 5 is a development schematic of a missing tooth design of the drive mechanism according to a preferred embodiment of the present application.
Fig. 6 is a schematic diagram of the operation of the drive mechanism in a preferred embodiment according to the present application.
FIG. 7 is a perspective view of a drive shaft and energy storage mechanism according to a preferred embodiment of the present application.
Fig. 8 is a partially exploded view of fig. 7 in accordance with a preferred embodiment of the present application.
FIG. 9 is an enlarged partial view taken at A in FIG. 8, in accordance with a preferred embodiment of the present application.
FIG. 10 is a view of the structural relationship of the unidirectional drive assembly and the clockwork spring according to a preferred embodiment of the present application.
FIG. 11 is a top plan view of the structural relationship of the drive mechanism and the stored energy mechanism in accordance with a preferred embodiment of the present application.
Fig. 12 is a bottom view of the structural relationship of the drive mechanism and the stored energy mechanism in accordance with a preferred embodiment of the present application.
Fig. 13 is a perspective view of an impeller according to a preferred embodiment of the present application.
FIG. 14 is a side view of an impeller in a preferred embodiment according to the present application.
Fig. 15 to 18 are schematic structural views of different arrangements of the double-layer impellers according to a preferred embodiment of the present application.
Figure 19 is a schematic diagram of the structure applied to a flocculation apparatus according to a preferred embodiment of the present application.
In the figure: 100. a stirring device for sewage treatment; 200. a flocculation tank; 1. a drive member; 11. a source of rotational power; 12. a drive mechanism; 13. a drive shaft; 14. a housing; 15. an energy storage mechanism; 121. a drive bevel gear; 122. a first driven bevel gear; 123. a second driven bevel gear; 124. connecting sleeves; 1211. a bevel gear section; 1212. a toothless segment; 131. mounting grooves; 141. an annular track; 151. fixing a joint; 152. a movable joint; 153. a clockwork spring; 154. a unidirectional drive assembly; 1541. a ratchet wheel; 1542. a pawl; 1543. resetting the elastic sheet; 2. a stirring shaft; 3. an impeller; 31. a shaft sleeve; 32. a blade; 321. a bottom surface; 322. waist surface.
Detailed Description
The present application is further described below with reference to specific embodiments, and it should be noted that, without conflict, any combination between the embodiments or technical features described below may form a new embodiment.
In the description of the present application, it should be noted that, for the orientation words, such as the terms "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the orientation and positional relationship indicated are based on the orientation or positional relationship of the drawings, and are only for the convenience of describing the present application and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific scope of the present application.
It is noted that the terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
The terms "comprises," "comprising," and "having," and any variations thereof, in the description and claims of this application, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
As shown in fig. 1 to 18, an agitation apparatus 100 for sewage treatment according to a preferred embodiment of the present application includes a driving member 1, an agitation shaft 2, and an impeller 3, wherein the impeller 3 is concentrically and fixedly disposed on the agitation shaft 2, the driving member 1 is adapted to drive the agitation shaft 2 to rotate reciprocally, and the agitation shaft 2 of this embodiment rotates reciprocally at an angle of 90 °. Wherein, drive component 1 includes rotary power source 11, actuating mechanism 12 and drive shaft 13, and the unidirectional rotation of rotary power source 11 is suitable for and drives drive shaft 13 reciprocating rotation through actuating mechanism 12, and drive shaft 13 concentric fixed connection (mixing) shaft 2. The rotary power source 11 of the embodiment can be a common motor, and the reciprocating rotation of the stirring shaft 2 can be realized by the unidirectional uniform-speed rotation of the common motor.
The key to achieving the above-mentioned reciprocating rotation is that the driving mechanism 12 in this embodiment adopts an incomplete gear driving mechanism. Specifically, the method comprises the following steps: as shown in fig. 4 to 6, the driving mechanism 12 includes a drive bevel gear 121, a first driven bevel gear 122 and a second driven bevel gear 123, the drive bevel gear 121 is provided with a continuous bevel tooth section 1211 and a non-tooth section 1212, the rotary power source 11 is adapted to drive the drive bevel gear 121 to rotate, the first driven bevel gear 122 and the second driven bevel gear 123 are respectively and fixedly arranged on the driving shaft 13 concentrically, the first driven bevel gear 122 and the second driven bevel gear 123 are arranged at intervals and have opposite tooth surfaces, and the drive bevel gear 121 is located between the first driven bevel gear 122 and the second driven bevel gear 123; the one-way rotation of the drive bevel gear 121 causes the bevel-tooth section 1211 to alternately engage the first driven bevel gear 122 and the second driven bevel gear 123, and the corresponding toothless section 1212 alternately passes through the second driven bevel gear 123 and the first driven bevel gear 122, thereby driving the driving shaft 13 to rotate reciprocally. For convenience of machining and installation, a connecting sleeve 124 is concentrically and fixedly arranged between the first driven bevel gear 122 and the second driven bevel gear 123, and the driving shaft 13 is suitable for entering the connecting sleeve 124 to realize concentric and fixed connection with the first driven bevel gear 122 and the second driven bevel gear 123.
In the present embodiment, the transmission ratio of the driving bevel gear 121 to the first driven bevel gear 122 and the transmission ratio of the driving bevel gear 121 to the second driven bevel gear 123 are both I, where I is 2: 1; the bevel gear section 1211 of the drive bevel gear 121 is disposed within a range of 180 °, and the reciprocating rotation angle of the first driven bevel gear 122 and the second driven bevel gear 123 is 90 °.
As shown in fig. 6, the drive bevel gear 121 rotates clockwise, and the drive bevel gear 121 is located at an initial position, a 90 ° position, a 180 ° position, a 270 ° position, and a 360 ° position (i.e., back to the initial position) in this order from top to bottom. When the drive bevel gear 121 rotates by 180 ° from the initial position, the first driven bevel gear 122 and the second driven bevel gear 123 rotate from left to right (the rotation direction is set to the forward rotation direction); when the driving bevel gear 121 rotates from the 180 ° position to the 360 ° position, the first driven bevel gear 122 and the second driven bevel gear 123 rotate from right to left (rotate in opposite directions), and the above process is repeated to realize the reciprocating rotation of the first driven bevel gear 122 and the second driven bevel gear 123, so that the stirring shaft 2 is driven to rotate in a reciprocating manner by the driving shaft 13.
In order to make the abrupt change more gradual and reduce the rotation power source 11, the present embodiment is further modified in that the rotation speed is abruptly changed when the first driven bevel gear 122 and the second driven bevel gear 123 are changed from the normal rotation to the reverse rotation or vice versa:
as shown in fig. 3, 7 to 12, the drive unit 1 has a housing 14, and an energy stocking mechanism 15 is provided between the housing 14 and the drive shaft 13, the energy stocking mechanism 15 having two and adapted to respectively stock the normal rotation and the reverse rotation of the drive shaft 13.
As shown in fig. 7 to 10, the energy storage mechanism 15 includes a fixed joint 151, a movable joint 152, a clockwork spring 153 and a one-way driving assembly 154, the fixed joint 151 is fixed on the housing 14, the one-way driving assembly 154 is disposed between the driving shaft 13 and the movable joint 152, one end of the clockwork spring 153 is fixedly connected to the fixed joint 151, and the other end of the clockwork spring 153 is fixedly connected to the movable joint 152; the driving shaft 13 is adapted to rotate in one direction 13 by the one-way driving assembly 154 to drive the movable joint 152 and to torsionally deform the clockwork spring 153 for energy storage, and the movable joint 152 is held stationary when the driving shaft 13 rotates in the other direction. The spiral directions of the clockwork springs 153 on the two energy storage mechanisms 15 are opposite, the stopping directions of the one-way driving assemblies 154 on the two energy storage mechanisms 15 are opposite, and the spiral direction of the clockwork spring 153 on the same energy storage mechanism 15 is the same as the stopping direction of the one-way driving assembly 154. The stop direction referred to herein is the direction in which drive shaft 13 can drive unidirectional drive assembly 154 to rotate synchronously.
As shown in fig. 9 and 10, the unidirectional driving assembly 154 of this embodiment is an internal engagement ratchet mechanism, the unidirectional driving assembly 154 includes a ratchet 1541, a pawl 1542 and a reset spring 1543, the ratchet 1541 is rotatably disposed on the housing 14, the ratchet 1541 and the driving shaft 13 are concentrically disposed, the driving shaft 13 is provided with an installation groove 131, the pawl 1542 is rotatably disposed in the installation groove 131, the reset spring 1543 is disposed between the pawl 1542 and the driving shaft 13 and forces the pawl 1542 to rotate outwards, the ratchet 1541 has internal teeth, and the pawl 1542 abuts against the internal teeth; the movable joint 152 is fixedly disposed on the ratchet 1541. As shown in fig. 7 and 8, the housing 14 is fixedly disposed with an annular rail 141, a plurality of T-shaped sliding rods extend from the ratchet 1541, the T-shaped sliding rods are distributed at intervals along the circumferential direction, and the ratchet 1541 is slidably disposed in the annular rail 141 through the T-shaped sliding rods and rotatably connected with the housing 14; one of the T-shaped slide bars is adapted to act as a movable joint 152 and is fixedly connected to a clockwork spring 153.
As shown in fig. 11 and 12, when the first driven bevel gear 122 and the second driven bevel gear 123 rotate forward, the energy accumulating mechanism 15 shown in fig. 12 operates to accumulate energy, and when the first driven bevel gear 122 and the second driven bevel gear 123 rotate backward, the energy accumulating mechanism 15 shown in fig. 11 operates to accumulate energy.
The energy storage mechanism 15 of the present embodiment enables the first driven bevel gear 122, the second driven bevel gear 123 and the driving shaft 13 to be smoother and more continuous when the forward and reverse rotation is switched, so as to avoid unnecessary pause and clamping stagnation, and reduce the impact of the driving mechanism 12 on the rotation power source 11. Specifically, the method comprises the following steps: when the driving shaft 13 rotates forwards, one energy storage mechanism 15 stores elastic potential energy; when the driving shaft 13 is switched from the forward rotation to the reverse rotation, one of the energy storage mechanisms 15 starts to release elastic potential energy, and gives a torque for the reverse rotation to the driving shaft 13 to offset part of the forward rotation inertia moment and reduce the acting force between the driving bevel gear 121 and the first and second driven bevel gears 122 and 123, thereby achieving the above effect; after the last moment, the driving shaft 13 starts to rotate reversely, the other energy storage mechanism 15 stores elastic potential energy, and the process is repeated.
As shown in fig. 5, the tooth surfaces of the first driven bevel gear 122 and the second driven bevel gear 123 are shown spread for clarity of presentation. As can be seen from fig. 4, the tooth flanks of the first driven bevel gear 122 and the second driven bevel gear are both provided within a range of 90 °, and with reference to fig. 5, the tooth flank of the first driven bevel gear 122 and the tooth flank of the second driven bevel gear 123 of the present embodiment are arranged with one tooth offset, the first tooth and the second last tooth on the tooth flank of the first driven bevel gear 122 are missing, the second tooth and the last tooth on the tooth flank of the second driven bevel gear 123 in the same direction are missing, and the missing positions of the first driven bevel gear 122 and the second driven bevel gear 123 correspond, and the first tooth and the last tooth on the bevel tooth section 1211 of the drive bevel gear 121 are missing. The missing teeth are arranged to make the driving shaft 13 smoother during forward and reverse rotation conversion, and avoid unnecessary interference and pause. Specifically, the method comprises the following steps: in fig. 5, the drive bevel gear 121 rotates clockwise, at this time, the first driven bevel gear 122 and the second driven bevel gear 123 finish rotating reversely and start to convert from reverse rotation to forward rotation, at this time, the two teeth of the head and the tail of the bevel tooth section 1211 are just at the missing teeth positions of the first driven bevel gear 122 and the second driven bevel gear 123, the drive bevel gear 121 continues to rotate clockwise, the bevel tooth section 1211 finishes meshing with the second driven bevel gear 123, starts to mesh with the first driven bevel gear 122 and starts to rotate forward; the gear-lacking arrangement avoids interference of the three gears during forward and reverse rotation, forward and reverse rotation conversion can be carried out more smoothly, and the two ends are arranged only by lacking one gear, so that obvious pause can not occur during forward and reverse rotation conversion, and the reciprocating rotation of the driving shaft 13 is ensured to be still a relatively continuous and smooth process.
As shown in fig. 13 and 14, the present embodiment further optimizes and improves the impeller 3, which includes a shaft sleeve 31 and blades 32, the shaft sleeve 31 is suitable for fixedly connecting the stirring shaft 2, and the blades 32 are two pieces and are disposed on the shaft sleeve 31 at 180 °; the section of the blade 32 is in an isosceles triangle structure, the blade 32 comprises a bottom surface 321 and two waist surfaces 322, the waist surfaces 322 are in an inwards concave arc structure, and the junction of the bottom surface 321 and the waist surfaces 322 is in an outwards convex round angle structure; the blades 32 taper from root to tip.
As shown in fig. 1, two impellers 3 are arranged on the stirring shaft 2 at intervals, and the two impellers 3 are arranged in a 90 ° crossing manner. The crossed arrangement of the double impellers 3 is matched with the arc-shaped structure of the waist surface 322, so that different upper and lower circulating flow fields (namely axial circulation) can be formed, a three-dimensional flow field is formed in the axial direction, and a better mixing effect is achieved. As shown in fig. 15 to 18, the two impellers 3 mainly have four arrangements, and can form different flow fields (the arrows in the drawings indicate the flow field directions), and different arrangements are selected according to different working environments, different flocculants, different stirring parameter requirements, and other conditions, which are not the main points of the present application and are not specifically described.
As shown in fig. 19, as an application, the present application provides a flocculation apparatus, which includes a flocculation tank 200, and a stirring device 100 for sewage treatment is provided in the flocculation tank 200.
The foregoing has described the general principles, essential features, and advantages of the application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, which are merely illustrative of the principles of the application, but that various changes and modifications may be made without departing from the spirit and scope of the application, and these changes and modifications are intended to be within the scope of the application as claimed. The scope of protection claimed by this application is defined by the following claims and their equivalents.
Claims (10)
1. The utility model provides an agitating unit for sewage treatment, includes driver part, (mixing) shaft and impeller, the impeller concentric fixed set up in on the (mixing) shaft, its characterized in that: the driving component is suitable for driving the stirring shaft to rotate in a reciprocating manner;
the driving part comprises a rotary power source, a driving mechanism, a driving shaft, a shell and an energy storage mechanism, the unidirectional rotation of the rotary power source is suitable for driving the driving shaft to rotate forwards or backwards through the driving mechanism, and the driving shaft is concentrically and fixedly connected with the stirring shaft so as to realize the reciprocating rotation of the stirring shaft;
the energy storage mechanism is provided with two energy storage mechanisms which are suitable for storing energy by respectively utilizing the positive rotation and the reverse rotation of the driving shaft, and the energy storage mechanisms are suitable for releasing energy when the driving shaft is converted from the positive rotation to the reverse rotation or from the reverse rotation to the positive rotation and are used for providing torque for the reverse rotation or the positive rotation of the driving shaft.
2. The stirring device for sewage treatment as set forth in claim 1, wherein: the driving mechanism is an incomplete gear driving mechanism and comprises a driving bevel gear, a first driven bevel gear and a second driven bevel gear, the driving bevel gear is provided with continuous bevel gear sections and non-gear sections, the rotating power source is suitable for driving the driving bevel gear to rotate, the first driven bevel gear and the second driven bevel gear are respectively and fixedly arranged on the driving shaft in a concentric mode, the first driven bevel gear and the second driven bevel gear are arranged at intervals, the tooth surfaces of the first driven bevel gear and the second driven bevel gear are opposite, and the driving bevel gear is located between the first driven bevel gear and the second driven bevel gear; the one-way rotation of the driving bevel gear enables the bevel gear section to alternately engage with the first driven bevel gear and the second driven bevel gear, and further drives the driving shaft to rotate in a reciprocating manner.
3. The stirring device for sewage treatment as set forth in claim 2, wherein: the energy storage mechanism comprises a fixed joint, a movable joint, a clockwork spring and a one-way driving assembly, the fixed joint is fixed on the shell, the one-way driving assembly is arranged between the driving shaft and the movable joint, one end of the clockwork spring is fixedly connected with the fixed joint, and the other end of the clockwork spring is fixedly connected with the movable joint; when the driving shaft rotates towards one direction, the driving shaft is suitable for driving the movable joint to rotate through the one-way driving assembly, and the clockwork spring is enabled to be twisted and deformed to realize energy storage, and when the driving shaft rotates towards the other direction, the movable joint is kept static;
the spiral directions of the clockwork spring on the two energy storage mechanisms are opposite, the stopping directions of the one-way driving assemblies on the two energy storage mechanisms are opposite, and the spiral direction of the clockwork spring on the same energy storage mechanism is the same as the stopping direction of the one-way driving assembly.
4. A stirring apparatus for sewage treatment as set forth in claim 3, wherein: the one-way driving assembly is an inner engagement ratchet mechanism and comprises a ratchet wheel, a pawl and a reset elastic sheet, the ratchet wheel is rotatably arranged on the shell and concentrically arranged with the driving shaft, an installation groove is formed in the driving shaft, the pawl is rotatably arranged in the installation groove, the reset elastic sheet is arranged between the pawl and the driving shaft and forces the pawl to rotate outwards, the ratchet wheel is provided with inner teeth, and the pawl abuts against the inner teeth; the movable joint is fixedly arranged on the ratchet wheel.
5. The stirring device for sewage treatment as set forth in claim 4, wherein: the shell is fixedly arranged on an annular track, a plurality of T-shaped slide rods extend out of the ratchet wheel, the T-shaped slide rods are distributed at intervals along the circumferential direction, and the ratchet wheel is arranged in the annular track in a sliding mode through the T-shaped slide rods and is connected with the shell in a rotating mode; one T-shaped sliding rod is suitable for serving as the movable joint and is fixedly connected with the clockwork spring.
6. The stirring device for sewage treatment as set forth in claim 2, wherein: the transmission ratio of the driving bevel gear to the first driven bevel gear and the transmission ratio of the driving bevel gear to the second driven bevel gear are I, and I is 2: 1; the bevel gear section of the driving bevel gear is arranged in a range of 180 degrees, and the reciprocating rotation angle of the first driven bevel gear and the reciprocating rotation angle of the second driven bevel gear are 90 degrees.
7. The stirring device for sewage treatment as set forth in claim 6, wherein: the tooth surfaces of the first driven bevel gear and the second driven bevel gear are both arranged in a range of 90 degrees, the tooth surface of the first driven bevel gear and the tooth surface of the second driven bevel gear are staggered by one tooth, a first tooth and a last but one tooth on the tooth surface of the first driven bevel gear are missing, a second tooth and a last tooth on the tooth surface of the second driven bevel gear are missing in the same direction, the missing positions of the first driven bevel gear and the second driven bevel gear correspond, and a first tooth and a last tooth on the bevel tooth section of the driving bevel gear are missing.
8. The stirring device for sewage treatment as set forth in claim 1, wherein: the impeller comprises a shaft sleeve and two blades, the shaft sleeve is suitable for being fixedly connected with the stirring shaft, and the two blades are arranged on the shaft sleeve in a 180-degree manner; the cross section of each blade is in an isosceles triangle structure, each blade comprises a bottom surface and two waist surfaces, each waist surface is in an inwards concave arc structure, and the junction of the bottom surface and the waist surfaces is in an outwards convex fillet structure; the blades taper from root to tip.
9. The stirring device for sewage treatment as set forth in claim 8, wherein: the impeller is two and the interval sets up on the (mixing) shaft, two the impeller is 90 alternately settings.
10. A flocculation equipment, includes the flocculation basin, its characterized in that: the flocculation tank is internally provided with a stirring device for sewage treatment as claimed in any one of claims 1 to 9.
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| CN202111094218.4A CN113617243B (en) | 2021-09-17 | 2021-09-17 | Agitating unit and have device's flocculation equipment for sewage treatment |
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| CN113617243B (en) | 2022-08-30 |
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