A lifting device for a coaxial mixer in water treatment

Abstract

The present invention discloses a lifting device for a water treatment coaxial mixer, belonging to the technical field of mixing equipment, which includes a supporting platform. A rotary driving device is connected below the supporting platform, and a mixer is connected below the rotary driving device. A lifting cross beam is arranged above the supporting platform, and screw rod lifting devices are connected to both ends of the lifting cross beam. A supporting device is connected between the lifting cross beam and the supporting platform. The supporting device includes a support seat and a support rod that are elastically and slidably arranged. The support seat is connected with an auxiliary connecting device. The device also includes a main shaft passing through the mixer, and a turntable is sleeved at the bottom of the main shaft. The present invention can realize the height and rotational speed adjustment of the mixer to achieve the best coagulation effect, and the overall structure of the device is compact, and it has anti-interference ability in many aspects.

Description

Technical Field

[0001] The invention belongs to the technical field of stirring equipment, and in particular relates to a lifting device for a coaxial stirrer for water treatment. Background Art

[0002] The coagulation treatment process of water and wastewater includes three stages: mixing of water and reagents, reaction, and separation of floccules and water. The clarifier is a device for coagulating water and removing suspended matter and colloids in water. The medium in the clarifier that intercepts and separates impurity particles is suspended sludge. By installing mechanical stirring equipment in the clarifier, the sludge in the clarifier is lifted up and placed in a uniformly distributed suspended state, forming a high-concentration stable active sludge layer in the pool. When the raw water rises through the sludge suspension layer, the contact flocculation principle is used to block the suspended matter by the sludge suspension layer to form floccules, making the water clear.

[0003] The control of the rising water flow in the clarifier is usually achieved through a frequency conversion motor and a scraper mixer transmission device. The existing frequency conversion speed regulation method has a small adjustment range, and the change in flow rate has limited effect on the coagulation effect and the return ratio. It is also necessary to install additional dehumidification equipment on the frequency converter to eliminate the defects caused by the humid environment. In addition, the existing scraper mixer transmission device occupies a large space and requires greater civil engineering work. At the same time, the rotation of the two shafts will interfere with the stability of the rising water flow, so that the coagulation effect does not achieve the expected effect. The vortex generated by the rotation of the two shafts will also increase the load on the drive shaft, improve the manufacturing requirements of the drive shaft, and increase the equipment cost.

[0004] The Japanese invention patent with application number JP2005095768A discloses an immersion deep mixing device, which includes an impeller with blades and a motor with a rotating impeller. The impeller and the motor constitute an underwater mixer installed downward above the bottom surface of the water tank, and the distance between the axis centers of the underwater mixer is shorter than the radius of the impeller. In the device, when the underwater mixer rises along the guide rod, the impeller rotates through the rotating device, so that the impeller moves relative to the guide rod, preventing the blades from hanging on the guide rod and avoiding the situation of hindering the rise of the underwater mixer. However, the invention does not have the function of adjusting the lifting and lowering of the mixer, but prevents the mixer from rising. It is not easy to promote the mixing effect by adjusting the height of the mixer, and due to the influence of the stirring resistance, the shaft body has rotation interference that affects the life of the motor. Summary of the invention

[0005] The object of the present invention is to provide a water treatment coaxial mixer lifting device which has a compact structure, low interference and can improve clarification efficiency in multiple directions.

[0006] The technical solution adopted by the present invention to achieve the above-mentioned purpose is:

[0007] A lifting device for a coaxial mixer in water treatment, comprising: a support platform, a rotary drive device is connected below the support platform, a mixer is connected below the rotary drive device, a lifting cross beam is erected above the support platform, screw rod lifting devices are connected to both ends of the lifting cross beam, and a plurality of support devices are connected between the lifting cross beam and the support platform. The rotation axes of the support platform, the rotary drive device, and the mixer are the same. The rotary drive device drives the mixer below to rotate and stir in the clarifying tank, so as to realize the suspension of sediment in water and filter and clarify the rising water flow.

[0008] Preferably, the screw rod lifting device includes a nut fixed at the end of the lifting cross beam. The axis direction of the threaded hole of the nut is the same as the axis direction of the rotation axis of the mixer. The screw rod lifting device further includes a screw rod shaft arranged in cooperation with the nut. By setting a stepping motor connected to the screw rod shaft, the two screw rod shafts rotate synchronously and in the same direction. Through the thread fit, the nut drives the lifting cross beam to lift and lower relative to the screw rod shaft, thereby driving the mixer below to lift and lower, so as to change the cross-sectional area of the water passage between the reaction chambers in the clarifying tank, thereby realizing the adjustment of the water flow velocity and flow rate, enhancing the formation of flocculent masses in water, and accelerating the clarification rate.

[0009] Preferably, the support device includes a support seat fixed at the upper end of the support platform. An opening is provided at the upper end of the support seat, and a support rod is slidably arranged. A first retaining piece is fixed at the bottom of the support rod. First springs are fixed at the upper and lower ends of the first retaining piece. A second retaining piece is fixed to the lower first spring. A spherical elastic member is provided between the second retaining piece and the inner bottom end of the support seat. The top of the support rod is connected to the lifting cross beam. When the mixer vibrates during stirring and transmits the vibration to the lifting cross beam above, the support rod absorbs the vibration through the deformation of the first spring and the elastic member, reduces the interference at the threaded assembly of the screw rod shaft and the nut, prevents the thread from wearing and causing the lifting to get stuck. When the lifting cross beam stops lifting instantly, the support rod and the support seat disperse the interference caused by inertia of the support platform and its components below through relative sliding, reduce the force on the lifting cross beam and prevent it from bending and breaking in the middle. When the stepping motor connected to a certain screw rod shaft stops working unexpectedly, the nut on the other side continues to rise, causing the lifting cross beam to tilt relatively. At this time, the first spring above the first retaining piece on the rising side is compressed, and at the same time, the elastic member on the stopped side is compressed, keeping the support platform and the rotary drive device below it in a vertical posture, avoiding interference caused by its tilt, reducing the maintenance cost, and ensuring the stirring efficiency.

[0010] Preferably, an auxiliary connection device is arranged outside the support base. The auxiliary connection device includes a connecting rod. One end of the connecting rod is hinged below the lead nut, and the other end is hinged with a sliding rod. A base is fixed to the upper end of the support platform. The base is provided with a communicating chute and a sliding hole. The connecting rod is movably connected to the chute, and the sliding rod is slidably connected to the sliding hole. The arrangement of the connecting rod provides support for the lead nut by the support platform, disperses the bearing capacity of the lead nut, further prevents the inclination of the lead nut relative to the lead screw shaft caused by the weight of the lower components, and prevents thread interference. When the support rod slides relative to the support base, the sliding rod and the connecting rod move relative to each other, and cooperate with the change in the distance between the middle of the lifting cross beam and the support platform, preventing the lifting cross beam from bending and breaking at the connection with the lead nut.

[0011] Preferably, the first baffle and the elastic member are arranged in cooperation with the inner wall of the support base. An air hole is provided in the side wall of the support base below the elastic member. The air hole is the same size as and coaxially arranged with the sliding hole, and the air hole is communicated with the sliding hole. When the support platform approaches the lifting cross beam, the elastic member is flattened and abuts against the inner wall of the support base. At this time, a relatively sealed space is formed between the bottom end of the first baffle and the elastic member. By buffering the relative displacement amount of the gas in the closed space, it is avoided that the support base impacts the lifting cross beam and causes it to bend. When the mixer rises in the pool, it is subjected to a large water resistance, causing the middle of the lifting cross beam to collapse and deform. At this time, the support rod moves upward and the elastic member recovers. The space below the first baffle increases, and the sliding rod enters the support base through the sliding hole and the air hole in sequence through air pressure, so as to synchronously reduce the horizontal height of the lead nut to make it level with the lifting cross beam, further reducing the interference at the thread assembly and preventing the lifting cross beam from deforming and breaking.

[0012] Preferably, the support platform includes an installation groove provided inside. A heat insulation plate is arranged in the middle of the installation groove. Tensioning members are arranged above, below and on the sides of the heat insulation plate. The tensioning members include a plurality of elastic rings arranged at intervals. A clamping seat is fixed on both sides of the plurality of elastic rings. The clamping seats are respectively fixed to the heat insulation plate and the installation groove. The heat insulation plate can effectively isolate the transfer of the environmental temperature above the clarifier to the pool water below, reducing the influence of temperature on the reaction rate. The tensioning members fix the heat insulation plate and the installation groove to form an interval space with a relatively large cross-sectional area, which can reduce the transmission of the bottom stirring noise to the outside, helping to reduce the external environmental noise pollution.

[0013] Preferably, a plurality of stirring blade groups are provided at the bottom of the mixer. Each stirring blade group includes a base shaft fixed to the bottom end of the mixer. The base shaft is connected with substrate plates on both sides. Blades are arranged at intervals up and down on the side of the substrate plate. The blades are rotatably connected to the substrate plate. Convex surfaces and concave surfaces are respectively formed at both ends of the blades. The adjacent convex surfaces and concave surfaces up and down are arranged in cooperation. The rotating mixer drives the stirring blade groups to rotate. Through the axial rotation of the blades relative to the substrate plate, the exchange of upper and lower layers of water bodies is promoted, the generation of flocculent precipitation is improved, and at the same time, the cross-sectional area of the water passing through a single reaction chamber can be changed, the water flow velocity is increased, and the clarification rate is accelerated. When a plurality of blades rotate, when the convex surface of the lower blade sweeps through the concave surface of the adjacent upper blade, the suspended matter can be broken to obtain a better flocculation effect, and at the same time, the blockage of the drainage and inlet of the clarification tank by excessive suspended matter is avoided.

[0014] Preferably, the support platform, the rotary drive device, and the rotation center of the mixer are all provided with hollow structures. The hollow structures are assembled and connected with a main shaft. A turntable is sleeved on the main shaft. The turntable is a frustum with an inwardly concave side wall. The large end of the turntable faces upward and is located below the stirring blade group. A plurality of curved convex strips are arranged around the turntable. The plurality of convex strips are spirally wound on the inwardly concave curved surface of the turntable. The main shaft can rotate in the hollow structure. The rotating turntable and convex strips drive the water body to rotate and stir. By adjusting the rotation speed of the main shaft to be lower than that of the mixer, a working state with a lower rotation speed at the bottom layer and a higher rotation speed at the upper layer is formed, which promotes the flow of the low-speed water body at the bottom to the high-speed water body above, promotes the rise of the water body and improves the filtration speed. The coaxial arrangement of the mixer and the main shaft reduces the overall layout space of the device and also reduces the swirling influence generated between the two shafts during operation. The turntable can promote the formation of a swirling flow that diffuses upward and outward of the water body, improve the stirring effect of the stirring blade group on the water body, and is also beneficial to cleaning the suspended matter attached to the inner wall of the clarification tank. In addition, the tensioning member can consume the vibration transmission received by the main shaft through the deformation of the elastic ring, reduce the assembly interference of the main shaft, improve the rotation stability and the interference of the driving member connected to the main shaft, and extend the service life.

[0015] Preferably, a plurality of water permeable grooves are communicated between the inwardly concave curved surface and the upper end surface of the turntable. The openings of the water permeable grooves on the upper end surface of the turntable are close to the outer wall of the main shaft. Part of the rising water body can enter the water permeable grooves from the bottom and flow out from the upper end surface of the turntable, which reduces the manufacturing cost of the turntable. At the same time, the formed water flow can clean the middle outer wall of the mixer without blades, which helps to clean the main shaft and prevent the suspension of suspended matter on the main shaft from causing jamming during disassembly.

[0016] Since the present invention adopts a lead screw lifting device to adjust the heights of a coaxial mixer and a main shaft, the following beneficial effects are achieved: the sliding setting of the support base and the support rod reduces the interference of the lower components caused by inertia when the lifting stops, and reduces the risk of fracture in the middle of the lifting crossbeam; the first spring and the elastic member consume the upward vibration of the mixer, reducing the interference of the vibration on the assembly part of the lead screw lifting device; when the lead screw shaft rotates and fails, the deformation of the first springs on both sides can keep the mixer vertical, while maintaining the mixing work, preventing the tilting and damage of the rotary drive device, and reducing the maintenance cost; the auxiliary connection device disperses the bearing capacity of the nut through the connecting rod, preventing the inclination at the connection from causing thread wear; the first baffle and the elastic member form a change in the internal air pressure of the support base, driving the sliding of the connecting rod to make the whole lifting crossbeam straight, preventing the fracture at the connection of the end of the lifting crossbeam; the support platform isolates the external temperature from being transmitted downward to affect the mixing environment through the heat insulation board; while fastening the heat insulation board, the tensioning member forms a spaced space between the heat insulation board and the support platform, isolating the internal noise from being transmitted outward; the tensioning member reduces the assembly interference of the main shaft passing through the support platform through the elastic ring, which helps to improve the rotation stability and service life; the upper and lower arranged blades can accelerate the water body exchange between the upper and lower layers and promote flocculation; the convex surface and the concave surface provided on the vane can break up the suspended matter, preventing the blockage of the water body inlet and outlet in the clarifying tank; the main shaft forms an outward expanding upward swirl through the convex strips on the turntable, improving the mixing ability of the blades, and cleaning the inner wall of the clarifying tank through the swirl; the turntable drains the water body through the water permeable groove to clean the main shaft, preventing jamming during disassembly; the coaxial arrangement of the main shaft and the mixer reduces the layout space and swirl interference, improving the clarification rate. Therefore, the present invention is a water treatment coaxial mixer lifting device with a compact structure, reduced interference and multi-directionally improved clarification efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. is a schematic assembly diagram of a support platform, a rotary drive device and a mixer;

[0018] Figure 2 FIG. is a front schematic assembly diagram of a support platform, a rotary drive device and a mixer;

[0019] Figure 3 FIG. is a schematic semi-sectional view of a support device;

[0020] Figure 4 FIG. is a schematic semi-sectional view of an auxiliary support device;

[0021] Figure 5 FIG. is a schematic diagram of a heat insulation board;

[0022] Figure 6 FIG. is a schematic diagram of the structure of a tensioning member;

[0023] Figure 7 FIG. is a schematic diagram of the structure of a blade;

[0024] Figure 8It is a schematic half-section view of a slewing drive device;

[0025] Figure 9 It is a schematic view of a turntable;

[0026] Figure 10 It is a schematic half-section view of a water permeable groove structure.

[0027] Reference numerals in the drawings: supporting platform 1; installation groove 10; heat insulation plate 11; tensioning member 12; elastic ring 13; clamping seat 14; slewing drive device 2; driven gear 20; driving gear 21; control motor 22; mixer 3; lifting cross beam 4; lead screw lifting device 5; lead screw nut 50; lead screw shaft 51; supporting device 6; supporting seat 60; supporting rod 61; first retaining piece 62; first spring 63; second retaining piece 64; elastic member 65; connecting sleeve 66; auxiliary connecting device 7; connecting rod 70; sliding rod 71; base 72; sliding groove 73; sliding hole 74; air hole 75; stirring blade group 8; base shaft 80; base plate 81; blade 82; convex surface 820; concave surface 821; main shaft 9; turntable 90; rib 91; water permeable groove 92. Detailed implementation manners

[0028] The technical solutions of the present invention will be further described in detail below in combination with the detailed implementation manners and the drawings:

[0029] Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] See the attached Figure 1 - Attached Figure 2 , a lifting device for a water treatment coaxial mixer 3, comprising: a supporting platform 1, a slewing drive device 2 is connected below the supporting platform 1, a mixer 3 is connected below the slewing drive device 2, a lifting cross beam 4 is erected above the supporting platform 1, lead screw lifting devices 5 are connected to both ends of the lifting cross beam 4, and a plurality of supporting devices 6 are connected between the lifting cross beam 4 and the supporting platform 1. The rotation axes of the supporting platform 1, the slewing drive device 2 and the mixer 3 are the same.

[0031] See the attached Figure 8 , the slewing drive device 2 includes a driving connecting member, and the driving connecting member includes an outer ring sleeve fixed to the lower end surface of the supporting platform. A clamping groove is provided in the outer ring sleeve and an inner ring sleeve is rotatably connected therein. The lower end surface of the inner ring sleeve extends out of the lower end surface of the outer ring sleeve and is fixed with a fitting for connecting and transitioning;

[0032] See the attached Figure 1, the slewing drive device 2 further includes a driven gear 20 fixed to the lower end face of the fitting. A driving gear 21 is arranged on the side of the driven gear 20. The driving gear 21 is connected to a driver for driving it to rotate. The driving gear 21 and the driven gear 20 are in gear transmission, and the driven gear 20 can slide relative to the driving gear 21 in the axial direction of the gear axis.

[0033] The slewing drive device 2 drives the lower mixer 3 to rotate and stir in the clarifying tank, so as to realize the suspension of the sediment in the water and filter and clarify the rising water flow.

[0034] See the appendix Figure 2 , the lead screw lifting device 5 includes a nut 50 fixed to the end of the lifting cross beam 4. The axial direction of the threaded hole of the nut 50 is the same as the axial direction of the rotation axis of the mixer 3. The lead screw lifting device 5 further includes a lead screw shaft 51 arranged in cooperation with the nut 50. The lead screw shaft 51 can be connected to a stepping motor for driving the axial rotation of the lead screw shaft 51 at the end, and the stepping motors connected to the lead screw shafts 51 on both sides adopt the same model and connection method.

[0035] By arranging the connection between the stepping motor and the lead screw shaft 51, the lead screw shafts 51 on both sides rotate synchronously and in the same direction. Through the threaded cooperation, the nut 50 drives the lifting cross beam 4 to lift relative to the lead screw shaft 51, thereby driving the lower mixer 3 to lift, so as to change the cross-sectional area of the water passage between the reaction chambers in the clarifying tank, thereby realizing the adjustment of the water flow velocity and flow rate, enhancing the formation of flocculent clusters in the water, and accelerating the clarification rate.

[0036] See the appendix Figure 3 , the support device 6 includes a support seat 60 fixed to the upper end of the support platform 1. The upper end of the support seat 60 is provided with an opening and a support rod 61 is slidably arranged. A first stop piece 62 is fixed to the bottom of the support rod 61. First springs 63 are fixed to the upper and lower ends of the first stop piece 62. A second stop piece 64 is fixed to the lower first spring 63. A spherical elastic member 65 is arranged between the second stop piece 64 and the inner bottom end of the support seat 60. The top of the support rod 61 is connected to the lifting cross beam 4.

[0037] When the mixer 3 is operating, it generates vibrations that are transmitted to the lifting crossbeam 4 above. The support rod 61 absorbs the vibrations through the deformation of the first spring 63 and the elastic member 65, reducing the interference at the threaded assembly of the lead screw shaft 51 and the nut 50, preventing thread wear and resulting in stuck lifting. When the lifting crossbeam 4 stops lifting instantaneously, the support rod 61 and the support base 60 disperse the interference caused by inertia of the support platform 1 and its components below through relative sliding, reducing the force on the lifting crossbeam 4 and preventing it from bending and breaking in the middle. When the stepping motor connected to a certain lead screw shaft 51 stops working unexpectedly, the nut 50 on the other side continues to rise, causing the lifting crossbeam 4 to tilt relatively. At this time, the first spring 63 above the first stop piece 62 on the rising side is compressed, and at the same time, the elastic member 65 on the stopping side is compressed, keeping the support platform 1 and the slewing drive device 2 below it in a vertical position, avoiding interference caused by tilting, reducing maintenance costs, and ensuring mixing efficiency.

[0038] See the appendix Figure 4 An auxiliary connection device 7 is arranged outside the support base 60. The auxiliary connection device 7 includes a connecting rod 70. One end of the connecting rod 70 is hinged below the nut 50 and the other end is hinged with a sliding rod 71. A base 72 is fixed to the upper end of the support platform 1. The base 72 is provided with a communicating chute 73 and a sliding hole 74. The connecting rod 70 is movably connected to the chute 73, and the sliding rod 71 is slidably connected to the sliding hole 74. The arrangement of the connecting rod 70 provides support for the nut 50 by the support platform 1, disperses the bearing capacity of the nut 50, further prevents the nut 50 from tilting relative to the lead screw shaft 51 due to the weight of the components below, and prevents thread interference. When the support rod 61 slides relative to the support base 60, the sliding rod 71 and the connecting rod 70 move relative to each other, cooperating with the change in the distance between the middle of the lifting crossbeam 4 and the support platform 1, preventing the lifting crossbeam 4 from bending and breaking at the connection with the nut 50.

[0039] The first stop piece 62 and the elastic member 65 are arranged in cooperation with the inner wall of the support base 60. An air hole 75 is provided in the side wall of the support base 60 below the elastic member 65. The air hole 75 is the same size and coaxially arranged with the sliding hole 74, and the air hole 75 communicates with the sliding hole 74. When the support platform 1 moves closer to the lifting crossbeam 4, the elastic member 65 is flattened and abuts against the inner wall of the support base 60. At this time, a relatively sealed space is formed between the bottom end of the first stop piece 62 and the elastic member 65. The relative displacement amount is buffered by the compression of the gas in the sealed space, avoiding the support base 60 hitting the lifting crossbeam 4 and causing it to bend. When the mixer 3 rises in the pool, it is subject to a large water resistance, causing the middle of the lifting crossbeam 4 to collapse and deform. At this time, the support rod 61 moves upward and the elastic member 65 recovers. The space below the first stop piece 62 increases, and the sliding rod 71 enters the support base 60 through the sliding hole 74 and the air hole 75 in sequence through air pressure, thereby synchronously reducing the horizontal height of the nut 50, making it horizontal relative to the lifting crossbeam 4, further reducing the interference at the threaded assembly and preventing the lifting crossbeam 4 from deforming and breaking.

[0040] See the appendixFigure 5 The support platform 1 includes an installation groove 10 opened on the inner side. A heat insulation plate 11 is provided in the middle of the installation groove 10. Tension members 12 are provided above, below and on the sides of the heat insulation plate 11. The tension members 12 include a plurality of elastic rings 13 arranged at intervals. A clamping seat 14 is fixed on both sides of the plurality of elastic rings 13. The clamping seats 14 are respectively fixed to the heat insulation plate 11 and the installation groove 10.

[0041] The heat insulation plate 11 can effectively isolate the transfer of the ambient temperature above the clarifier to the pool water below, reducing the influence of temperature on the reaction rate. The tension members 12 fix the heat insulation plate 11 and the installation groove 10 to form an interval space with a relatively large cross-sectional area, which can reduce the transmission of the bottom stirring noise to the outside, helping to reduce the external environmental noise pollution.

[0042] See the appendix Figure 7 At the bottom of the mixer 3, a plurality of stirring blade groups 8 are provided. The stirring blade group 8 includes a base shaft 80 fixed to the bottom end of the mixer 3. The base shaft 80 is connected with a base plate 81 on both sides. Blades 82 are arranged at intervals above and below the side of the base plate 81. The blades 82 are rotatably connected to the base plate 81. Convex surfaces 820 and concave surfaces 821 are respectively opened at both ends of the blades 82. The adjacent upper and lower convex surfaces 820 and concave surfaces 821 are arranged in cooperation.

[0043] The rotating mixer 3 drives the stirring blade group 8 to rotate. Through the axial rotation of the blades 82 relative to the base plate 81, the exchange of upper and lower layers of water is promoted, the generation of flocculent precipitation is improved, and at the same time, the cross-sectional area of the water flow passing through a single reaction chamber can be changed, increasing the water flow velocity, realizing the acceleration of the clarification rate. When a plurality of blades 82 rotate, when the convex surface 820 of the lower blade 82 sweeps through the concave surface 821 of the adjacent upper blade 82, the suspended matter can be broken to obtain a better flocculation effect, and at the same time, the blockage of the drainage and inlet of the clarifier by excessive suspended matter is avoided.

[0044] See the appendix Figure 8 - appendix Figure 9 In the support platform 1, the rotary drive device 2, and the rotation centers of the mixer 3, hollow structures are provided. The hollow structures are assembled and connected with a main shaft 9. A turntable 90 is sleeved on the main shaft 9. The turntable 90 is a frustum with an inwardly concave side wall. The large end of the turntable 90 faces upward and is located below the stirring blade group 8. A plurality of curved convex strips 91 are arranged around the turntable 90. The plurality of convex strips 91 are spirally wound on the inwardly concave curved surface of the turntable 90.

[0045] The main shaft 9 can rotate within the hollow structure. The rotating turntable 90 and the convex strip 91 drive the water body to rotate and stir. By adjusting the rotation speed of the main shaft 9 to be lower than that of the mixer 3, a working state is formed where the rotation speed at the bottom layer is lower than that at the upper layer, promoting the flow of the low-speed water body at the bottom towards the high-speed water body above, enhancing the upward movement of the water body and increasing the filtration speed. The coaxial arrangement of the mixer 3 and the main shaft 9 reduces the overall layout space of the device and also reduces the swirling influence generated between the two shafts during operation. The turntable 90 can promote the formation of a swirling flow that diffuses upward and outward, improving the stirring effect of the stirring blade group 8 on the water body. At the same time, it is also beneficial for cleaning the suspended matter attached to the inner wall of the clarifying tank. Additionally, the tensioning member 12 can consume the vibration transmitted to the main shaft 9 through the deformation of the elastic ring 13, reducing the assembly interference of the main shaft 9, improving the rotational stability and the interference with the driving member connected to the main shaft 9, and extending the service life.

[0046] See the appendix Figure 10 , a plurality of water permeable grooves 92 are communicatively arranged between the concave inner surface and the upper end surface of the turntable 90. The openings of the water permeable grooves 92 on the upper end surface of the turntable 90 are close to the outer wall of the main shaft 9. Part of the rising water body can enter the water permeable grooves 92 from the bottom and flow out from the upper end surface of the turntable 90, reducing the manufacturing cost of the turntable 90. At the same time, the formed water flow can clean the middle outer wall of the mixer 3 where there are no blades 82, contributing to the cleaning of the main shaft 9 and preventing the adhesion of suspended matter on the main shaft 9 from causing jamming during disassembly.

[0047] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any perspective, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A lifting device for a coaxial mixer in water treatment, comprising: a support platform (1), a rotary drive device (2) is connected below the support platform (1), and a mixer (3) is connected below the rotary drive device (2), characterized in that: a lifting cross beam (4) is erected above the support platform (1), screw rod lifting devices (5) are connected to both ends of the lifting cross beam (4), a plurality of support devices (6) are connected between the lifting cross beam (4) and the support platform (1), and the rotation axes of the support platform (1), the rotary drive device (2) and the mixer (3) are the same; The screw rod lifting device (5) includes a nut (50) fixed to the end of the lifting cross beam (4), the axis direction of the threaded hole of the nut (50) is consistent with the rotation axis direction of the mixer (3), and the screw rod lifting device (5) further includes a screw rod shaft (51) arranged in cooperation with the nut (50); the screw rod shaft (51) is connected at the end to a stepping motor that drives the axial rotation of the screw rod shaft (51). The support device (6) includes a support seat (60) fixed to the upper end of the support platform (1), the upper end of the support seat (60) is provided with an opening and a support rod (61) is slidably arranged therein, a first stop piece (62) is fixed to the bottom of the support rod (61), first springs (63) are fixed to the upper and lower ends of the first stop piece (62), a second stop piece (64) is fixed to the lower first spring (63), and a spherical elastic member (65) is provided between the second stop piece (64) and the inner bottom end of the support seat (60), and the top of the support rod (61) is connected to the lifting cross beam (4); An auxiliary connection device (7) is provided outside the support seat (60), the auxiliary connection device (7) includes a connecting rod (70), one end of the connecting rod (70) is hinged below the nut (50) and the other end is hinged to a sliding rod (71), a base (72) is fixed to the upper end of the support platform (1), and the base (72) is provided with a communicating chute (73) and a sliding hole (74), the connecting rod (70) is movably connected to the chute (73), and the sliding rod (71) is slidably connected to the sliding hole (74); The first stop piece (62) and the elastic member (65) are arranged in cooperation with the inner wall of the support seat (60), an air hole (75) is provided in the side wall of the support seat (60) below the elastic member (65), the air hole (75) is the same size and coaxially arranged with the sliding hole (74), and the air hole (75) is communicated with the adjacent sliding hole (74).

2. A lifting device for a coaxial mixer in water treatment according to claim 1, characterized in that: The support platform (1) includes an installation groove (10) opened on the inner side. A heat insulation plate (11) is provided in the middle of the installation groove (10). Tension members (12) are provided above, below and on the sides of the heat insulation plate (11). The tension members (12) include a plurality of elastic rings (13) arranged at intervals. A clamping seat (14) is fixed on both sides of the plurality of elastic rings (13). The clamping seats (14) are respectively fixed to the heat insulation plate (11) and the installation groove (10).

3. The lifting device of a water treatment coaxial mixer according to claim 1, characterized in that: A plurality of stirring blade groups (8) are provided at the bottom of the mixer (3). The stirring blade group (8) includes a base shaft (80) fixed to the bottom end of the mixer (3). The base shaft (80) is connected with a base plate (81) on both sides. Blades (82) are arranged at intervals above and below the side of the base plate (81). The blades (82) are rotatably connected to the base plate (81). Convex surfaces (820) and concave surfaces (821) are respectively opened at both ends of the blades (82). The adjacent upper and lower convex surfaces (820) and concave surfaces (821) are arranged in cooperation.

4. The lifting device of a water treatment coaxial mixer according to claim 3, characterized in that: Hollow structures are provided at the rotation centers of the support platform (1), the rotary drive device (2), and the mixer (3). A main shaft (9) is assembled and connected to the hollow structure. A turntable (90) is sleeved on the main shaft (9). The turntable (90) is a frustum with an inwardly concave side wall. The large end of the turntable (90) faces upward and is located below the stirring blade group (8). A plurality of curved convex strips (91) are arranged around the turntable (90). The plurality of convex strips (91) are spirally wound on the inwardly concave curved surface of the turntable (90).

5. The lifting device of a water treatment coaxial mixer according to claim 4, characterized in that: A plurality of water permeable grooves (92) are communicated between the inwardly concave curved surface and the upper end surface of the turntable (90). The openings of the water permeable grooves (92) on the upper end surface of the turntable (90) are close to the outer wall of the main shaft (9).

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