A quantitative mixing device for preparing polyaluminium chloride

Abstract

The present invention is applicable to the technical field of polyaluminium chloride production, and provides a quantitative mixing device for the preparation of polyaluminium chloride; comprising: a device body provided with an internal cavity; a stirring component, reciprocatingly arranged inside the device body; a scraper ring, slidably arranged on the inner wall of the device body, the scraper ring slides up and down, and is used to automatically wipe the attachments adhered to the inner wall of the device body; and a plurality of matching blade arrays are arranged on the inner wall of the scraper ring, the matching blades are used to utilize the rotational power of the stirring liquid to drive the scraper ring to slide upward along the inner wall of the device body. The matching blades of the present invention drive the scraper ring to slide upward, and then scrape off the raw materials adhered to the inner wall of the device body, thereby improving the mixing effect; and when the scraper ring and the matching blades are at the top of the liquid surface, the stirring liquid at the top of the liquid surface will also collide with the matching blades, so that the components floating on the top of the liquid surface that are not dissolved in the stirring liquid can be dissolved in the solution content, further improving the mixing effect.

Description

Technical Field

[0001] The invention relates to the technical field of polyaluminium chloride production, in particular to a quantitative mixing device for preparing polyaluminium chloride. Background Art

[0002] Polyaluminum chloride is an emerging water purification material, an inorganic polymer coagulant, referred to as polyaluminum. Polyaluminum chloride can be produced by mixing calcium aluminate powder and hydrochloric acid in a high temperature environment to produce a chemical reaction. During the reaction, a mixing device is required for sufficient mixing.

[0003] Existing mixing devices usually adopt one-way stirring and mixing during the mixing process, which cannot guarantee the mixing effect. In order to solve this technical problem, a quantitative mixing device for preparing polyaluminum chloride is proposed. Summary of the Invention

[0004] The object of the present invention is to provide a quantitative mixing device for preparing polyaluminium chloride to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A quantitative mixing device for preparing polyaluminium chloride, comprising: a device body with an internal cavity;

[0007] A stirring component is disposed inside the device body for reciprocating rotation;

[0008] A scraper ring is slidably arranged on the inner wall of the device body, and the scraper ring slides up and down to automatically wipe the attachments adhering to the inner wall of the device body;

[0009] Furthermore, a plurality of matching blade arrays are arranged on the inner wall of the scraper ring, and the matching blades are used to utilize the rotational power of the stirring liquid to drive the scraper ring to slide upward along the inner wall of the device body.

[0010] As a further solution of the present invention: the vertical cross-section of the matching blade includes a first end and a second end, wherein the first end is arranged close to the wall of the device body, and the second end is arranged lower than the first end.

[0011] As a further solution of the present invention: the outer array of the scraper ring is provided with a sliding rod, and the sliding rod is slidably arranged in a guide groove on the wall of the device body.

[0012] As a further solution of the present invention: a first rotating ring is elastically rotatably provided inside the scraper ring, and the matching blades are fixedly mounted on the first rotating ring.

[0013] As a further solution of the present invention: the stirring member includes:

[0014] A drive shaft is rotatably mounted on the device body;

[0015] A matching rotating shaft is provided inside the device body, one end of which is connected to the driving shaft, and a plurality of stirring blades are arranged on the matching rotating shaft;

[0016] And, a power assembly is arranged on the device body and is used to drive the driving shaft to rotate back and forth, and one end of the driving shaft is transmission-connected to the power assembly.

[0017] As a further solution of the present invention: a reversing vibration mechanism is provided between the driving shaft and the mating rotating shaft.

[0018] As a further solution of the present invention: the reversing vibration mechanism includes driving rods symmetrically arranged on both sides of the driving shaft, a rotating member arranged at the top of the mating rotating shaft, a first vibration mechanism and a second vibration mechanism; four rotating members, two of which form a reversing structure, and the second vibration mechanism and the first vibration mechanism are respectively arranged on both sides of the reversing structure; the rotating member includes a rotating end and a movable end, and the rotating end of the rotating member is elastically rotatably mounted on the mating rotating shaft; the movable end of the rotating member is provided with an interference groove, and the two movable ends of the rotating members in the reversing structure are arranged opposite to each other, and the interference groove is provided for the driving rod to interfere with the interference groove to drive the mating rotating shaft to rotate; the mating rotating shaft is elastically rotatably mounted on the driving shaft.

[0019] As a further solution of the present invention: the first vibration mechanism and the second vibration mechanism have the same structure, and both are arranged in a wave structure.

[0020] As a further solution of the present invention: the driving shaft and the mating rotating shaft are elastically rotatably installed through a first elastic member and a second rotating ring, the second rotating ring is rotatably installed on the mating rotating shaft, and both ends of the first elastic member are fixedly installed on the driving shaft and the second rotating ring respectively.

[0021] As a further solution of the present invention: a material delivery pipeline is further provided on the device body, and a flow meter is provided on the material delivery pipeline.

[0022] Compared with the existing technology, the beneficial effects of the present invention are as follows: the cooperating blade drives the scraper ring to slide upward, and then scrapes off the raw materials adhering to the inner wall of the device body, thereby improving the mixing effect; and when the scraper ring and the cooperating blade are at the top of the liquid surface, the stirring liquid at the top of the liquid surface will also impact the cooperating blade, so that the components floating on the top of the liquid surface that have not been dissolved in the stirring liquid can be absorbed into the solution content, further improving the mixing effect; and when the cooperating blade is hit by the stirring liquid, the flow direction of the stirring liquid is changed, further improving the mixing effect. The present invention effectively solves the problem of cylinder wall adhesion in the existing technology and improves the mixing effect; and the reciprocating stirring ensures the stirring effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of a quantitative mixing device for preparing polyaluminium chloride according to an embodiment of the present invention.

[0024] Figure 2 This is a schematic structural diagram of a scraper ring in a quantitative mixing device for preparing polyaluminium chloride according to an embodiment of the present invention.

[0025] Figure 3 This is a force analysis state diagram of the blades in a quantitative mixing device for preparing polyaluminium chloride according to an embodiment of the present invention.

[0026] Figure 4 This is a structural schematic diagram of a vertical cross-section of a matching blade in a quantitative mixing device for preparing polyaluminium chloride according to an embodiment of the present invention.

[0027] Figure 5 This is a schematic diagram of the internal structure of a scraper ring in a quantitative mixing device for preparing polyaluminium chloride according to an embodiment of the present invention.

[0028] Figure 6 Schematic diagram of the structure of the top of the rotating shaft in a quantitative mixing device for preparing polyaluminium chloride according to an embodiment of the present invention Figure 1 .

[0029] Figure 7 Schematic diagram of the structure of the top of the rotating shaft in a quantitative mixing device for preparing polyaluminium chloride according to an embodiment of the present invention Figure 1 .

[0030] Figure 8 This is a schematic structural diagram of a rotating part in a quantitative mixing device for preparing polyaluminium chloride according to an embodiment of the present invention.

[0031] In the figure: 1-device body, 2-drive shaft, 3-first gear, 4-rack, 5-connecting rod, 6-drive disk, 7-second gear, 8-third gear, 9-drive motor, 10-matching rotating shaft, 11-first elastic member, 12-second rotating ring, 13-rotating member, 14-drive rod, 15-feeding pipeline, 16-flow meter, 17-mixing blade, 18-scraper ring, 19-matching blade, 20-guide chute, 21-guide wheel, 22-discharge pipe, 23-first vibration mechanism, 24-second vibration mechanism, 25-guide ramp, 26-first rotating ring, 27-second elastic member, 28-contact groove. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] Example 1

[0034] See also Figures 1 to 4 In Example 1 of the present invention, a structural diagram of a quantitative mixing device for preparing polyaluminum chloride provided by the embodiment of the present invention includes: a device body 1 provided with an internal cavity; a stirring component that rotates back and forth is provided inside the device body 1; a scraper ring 18 is slidably provided on the inner wall of the device body 1, and the scraper ring 18 slides up and down to automatically wipe off the attachments adhering to the inner wall of the device body 1 to improve the stirring effect; a plurality of cooperating blades 19 are arranged in an array on the inner wall of the scraper ring 18, and the cooperating blades 19 are used to utilize the rotational power of the stirring liquid to drive the scraper ring 18 to slide upward along the inner wall of the device body 1.

[0035] Specifically, the present invention adds material to the interior of the device body 1. After the material is added, the stirring component rotates forward. During this rotation, the stirring liquid passes through the cooperating blades 19, generating an upward driving force. This force causes the cooperating blades 19 to drive the scraper ring 18 upward, scraping away any material adhering to the inner wall of the device body 1 and improving the mixing effect. Furthermore, when the scraper ring 18 and the cooperating blades 19 are at the top of the liquid surface, the stirring liquid at the top of the liquid surface will also impact the cooperating blades 19, allowing components floating on the top of the liquid surface that have not been incorporated into the stirring liquid to be incorporated into the solution, further improving the mixing effect. Furthermore, when the cooperating blades 19 are impacted by the stirring liquid, the stirring liquid's flow direction is changed, further improving the mixing effect. This invention effectively solves the problem of adhesion to the cylinder wall in the prior art and improves the mixing effect. When the stirring component rotates in the reverse direction, the cooperating blades 19 lose the driving force of the stirring liquid, causing the scraper ring 18 and the cooperating blades 19 to move downward under their own weight and the pressure of the stirring liquid. This allows the scraper ring 18 to automatically slide up and down during the forward and reverse rotation of the stirring component. This reciprocating stirring ensures a good stirring effect.

[0036] Example 2

[0037] See also Figures 1 to 8The main difference between Example 2 and Example 1 is that, in order to reduce the lift required by the scraper ring 18 and the cooperating blades 19 during operation, the density of the scraper ring 18 and the cooperating blades 19 can be set to be close to or less than the density of the stirring liquid. The scraper ring 18 can be hollowed out, or the cooperating blades 19 can be made of a material with a density less than that of the stirring liquid. In this way, the density of the scraper ring 18 and the cooperating blades 19 is close to but less than the density of the stirring liquid.

[0038] like Figure 2-4 As shown, as a preferred embodiment of the present invention, in order to further improve the mixing effect, during the process of scraping the attachments on the wall of the device body 1 by the scraper ring 18, the attachments may partially adhere to the scraper ring 18. In order to participate in the mixing, the vertical cross-section of the cooperating blade 19 includes a first end and a second end, wherein the first end is arranged close to the wall of the device body 1 and the second end is arranged lower than the first end. In this way, when the stirring liquid impacts the cooperating blade 19, the second end and the first end of the cooperating blade 19 guide the stirring liquid toward the wall of the device body 1, thereby allowing the stirring liquid to clean the scraper ring 18 and the attachments adhered to the wall of the device body 1. This can further improve the scraping effect, clean the attachments on the wall of the device body 1, and reduce the resistance during the lifting and lowering of the scraper ring 18. The cooperating blade 19 is arranged at an angle relative to the horizontal plane.

[0039] like Figure 1 and 5 As shown in FIG. 1 , as another preferred embodiment of the present invention, in order to ensure the stability of the scraper ring 18 when it is lifted and lowered, a sliding rod is arranged on the outer side of the scraper ring 18, and the sliding rod slides in a guide groove 20 provided on the wall of the device body 1. In this way, the scraper ring 18 can slide up and down stably.

[0040] In some examples, the outer side of the scraper ring 18 may further be a guide wheel 21, which is rolled in the guide chute 20 to reduce running resistance. There are at least three guide wheels 21.

[0041] like Figure 1 and 5As shown, to further enhance the mixing effect, a first rotating ring 26 is elastically rotatably disposed within the scraper ring 18, with the cooperating blade 19 fixedly mounted on the first rotating ring 26. Thus, at the beginning of stirring, the first rotating ring 26 is impacted by the stirring liquid, causing it to rotate relative to the scraper ring 18. As the stirring component reverses direction and the stirring liquid's rotational speed changes, the first rotating ring 26 reciprocates relative to the scraper ring 18, thereby changing the position of the cooperating blade 19 relative to the cylinder wall. As the stirring liquid passes through the cooperating blade 19 to clean the inner wall of the device body 1, it can change position and clean it, achieving comprehensive cleaning of the inner wall of the device body 1. The first rotating ring 26 is elastically rotatably mounted on the scraper ring 18 via a second elastic member 27, the two ends of which are fixedly mounted on the first rotating ring 26 and the scraper ring 18, respectively. The second elastic member 27 may be a coil spring.

[0042] like Figure 1 、 6 As shown in Figures 7 and 8, the stirring component includes a drive shaft 2, a matching rotating shaft 10 and a power assembly; the power assembly is used to drive the drive shaft 2 to rotate back and forth, and the power assembly is arranged on the device body 1; the drive shaft 2 is rotatably arranged on the device body 1; one end of the drive shaft 2 is transmission-connected to the power assembly, and the other end is connected to the matching rotating shaft 10;

[0043] The mating shaft 10 is disposed within the device body 1, and a plurality of stirring blades 17 are disposed on the mating shaft 10. The stirring blades 17 can be welded to the device body 1. Thus, when the power assembly drives the drive shaft 2 to rotate back and forth, the drive shaft 2 drives the mating shaft 10 to cause the stirring blades 17 to rotate back and forth, thereby achieving reciprocating stirring.

[0044] In order to improve the stirring effect, a reversing vibration mechanism is provided between the driving shaft 2 and the mating rotating shaft 10; the mating rotating shaft 10 is elastically rotatably mounted on the driving shaft 2; the reversing vibration mechanism includes a driving rod 14 symmetrically arranged on both sides of the driving shaft 2, a rotating member 13 arranged at the top of the mating rotating shaft 10, a first vibration mechanism 23 and a second vibration mechanism 24; four rotating members 13, of which two rotating members 13 form a group of reversing structures, and the second vibration mechanism 24 and the first vibration mechanism 23 are respectively provided on both sides of the reversing structure; the rotating member 13 includes a rotating end and a movable end, and the rotating end of the rotating member 13 is elastically rotatably mounted on the mating rotating shaft 10; the movable end of the rotating member 13 is provided with a resistance groove 28, and the movable ends of the two rotating members 13 in the reversing structure are arranged relative to each other, and the resistance groove 28 is provided for the driving rod 14 to resist on the resistance groove 28, thereby driving the mating rotating shaft 10 to rotate. When the stirring component is in reverse rotation, the rotating member 13 is hit by the driving rod 14, and the stirring liquid also drives the guide slope 25 to rotate in the opposite direction of the driving rod 14, so that the impact force on the rotating member 13 is greater than the elastic rotation force of the rotating member 13, so that the rotating member 13 rotates. When the rotating member 13 rotates to a vertical state, the driving rod 14 slides out of the interference groove 28. Under the elastic action between the matching shaft 10 and the drive shaft 2, the driving rod 14 contacts the first vibration mechanism 23 or the second vibration mechanism 24, and the matching shaft 10 is driven to drive the second gear 7 to vibrate up and down, thereby increasing the impact on the rotating mixture and improving the mixing effect; and during the rotation of the rotating member 13, the rotating member 13 drives the matching shaft 10 to move downward, and then when the driving rod 14 is in a vertical state, the driving rod 14 suddenly leaves the interference groove 28, and the matching shaft 10 generates a larger amplitude under the elastic action, which can increase the impact intensity of the stirring liquid and improve the mixing effect. Rotating member 13 is rotatably mounted on mating shaft 10 via a torsion spring. This allows for elastic rotatable mounting of rotating member 13 on mating shaft 10. Simultaneously, the reciprocating vibration of stirring blade 17 changes the rotational speed of the stirring liquid within the layer of mating blade 19, enabling reciprocating sliding between mating blade 19 and scraper ring 18. This allows mating blade 19 to flush the walls of device body 1 and scraper ring 18 at various locations, improving the flushing effect.

[0045] like Figure 1 、 6As shown in Figures 7 and 8, the first vibration mechanism 23 and the second vibration mechanism 24 have the same structure, and both are arranged in a wave structure. The first vibration mechanism 23 and the second vibration mechanism 24 are arranged at the end close to the rotating member 13 as the wave crest end. In this way, when the driving rod 14 slides on the first vibration mechanism 23 or the second vibration mechanism 24 toward the rotating member 13, it can smoothly slide into between the two rotating members 13. A guide slope 25 is provided on the upper part of the rotating end of the rotating member 13. The guide slope 25 allows the driving rod 14 to smoothly slide from the first vibration mechanism 23 or the second vibration mechanism 24 to the rotating member 13.

[0046] The drive shaft 2 and the mating shaft 10 are elastically rotatably mounted via a first elastic member 11 and a second rotating ring 12. The second rotating ring 12 is rotatably mounted on the mating shaft 10. Both ends of the first elastic member 11 are fixedly mounted on the drive shaft 2 and the second rotating ring 12. The first elastic member 11 may be a coil spring.

[0047] like Figure 1 As shown, to achieve quantitative feeding, the device body 1 is further provided with a feed pipe 15, on which a flow meter 16 is provided. The flow meter 16 is used to measure the mixed raw materials added to the device body 1. The device body 1 is provided with a switch door, which is used to add powder into the device body 1. The feed pipe 15 can also be provided with a feed pump.

[0048] In some embodiments, the power assembly includes a first gear 3 and a rack 4. The first gear 3 is fixedly mounted on the drive shaft 2. The rack 4 is reciprocatingly slidably disposed on the device body 1. The first gear 3 is meshed with the rack 4. In this way, the reciprocating sliding of the rack 4 drives the first gear 3 to reciprocate.

[0049] In some embodiments, the power assembly further includes a connecting rod 5, a drive disc 6, a second gear 7, a third gear 8, and a drive motor 9; one end of the connecting rod 5 is rotatably mounted on the rack 4, and the other end is rotatably mounted on the drive disc 6, which is rotatably mounted on the device body 1. The drive disc 6 is coaxially arranged with the second gear 7, and the second gear 7 is meshed with the third gear 8, which is arranged at the output end of the drive motor 9; the drive motor 9 can be fixedly mounted on the device body 1. Thus, when the drive motor 9 is energized, it drives the third gear 8 to rotate the second gear 7, and the second gear 7 drives the drive disc 6 to rotate, thereby driving the rack 4 to slide back and forth on the device body 1 through the connecting rod 5.

[0050] Furthermore, there may be two drive disks 6, both of which are rotatably connected to the connecting rod 5, and both of which are rotatably mounted on the device body 1. This ensures operational stability.

[0051] In order to discharge the mixed raw materials, a discharge pipe 22 is further provided on the device body 1 .

[0052] The working principle of the present invention is:

[0053] The material is quantitatively added to the inside of the device body 1 through the feeding pipe 15. After the addition is completed, the driving motor 9 drives the third gear 8 to rotate, and drives the rack 4 to slide through the second gear 7, the driving plate 6 and the connecting rod 5. The rack 4 drives the driving shaft 2 to rotate forward through the first gear 3. During the rotation process, when the stirring liquid passes through the matching blade 19, an upward driving force is generated, which makes the matching blade 19 drive the scraper ring 18 to slide upward, and then scrapes the raw materials adhered to the inner wall of the device body 1 to improve the mixing effect; and when the scraper ring 18 and the matching blade 19 are at the top of the liquid surface, the liquid surface top is The stirring liquid will also collide with the matching blades 19, so that the components floating on the top of the liquid surface that are not dissolved in the stirring liquid can be dissolved in the solution content, further improving the mixing effect; and when the matching blades 19 are hit by the stirring liquid, the flow direction of the stirring liquid is changed, further improving the mixing effect; when the rack 4 slides in the opposite direction, the first gear 3 drives the drive shaft 2 to rotate in the opposite direction, and the rotating member 13 is hit by the driving rod 14. At the same time, the stirring liquid will also drive the guide slope 25 to rotate in the opposite direction of the driving rod 14, so that the impact force on the rotating member 13 is greater than the elasticity of the rotating member 13 The rotating member 13 rotates with the rotating force, and when the rotating member 13 rotates to the vertical state, the driving rod 14 slides out of the interference groove 28. Under the elastic action between the matching shaft 10 and the driving shaft 2, the driving rod 14 contacts the first vibration mechanism 23 or the second vibration mechanism 24, and the matching shaft 10 is driven to drive the second gear 7 to vibrate up and down. In the process of rotating the rotating member 13, the rotating member 13 drives the matching shaft 10 to move downward, and then when the driving rod 14 is in the vertical state, the driving rod 14 suddenly leaves the interference groove 28, and the matching shaft 10 is elastically moved. The present invention generates a larger amplitude, which can increase the impact strength of the stirring liquid and improve the mixing effect; when the stirring liquid speed slows down, the driving shaft 2 rotates in the opposite direction. At this time, the impact force of the stirring liquid on the rotating part 13 becomes smaller, and the rotating part 13 will not deflect. Under the drive of the driving rod 14, it will rotate in the opposite direction with the driving shaft 2 to achieve reversing stirring. The present invention is configured to enable the rotating part 13 to rotate in the opposite direction when the rotation speed of the stirring liquid drops to a certain proportion. In this way, the impact on the drive motor 9 can be reduced during the reversing process, thereby ensuring the safe use of the drive motor 9.

[0054] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0055] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0056] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0057] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A quantitative mixing device for preparing polyaluminium chloride, characterized in that: include: A device body having an internal cavity; A stirring component is disposed inside the device body for reciprocating rotation; A scraper ring is slidably arranged on the inner wall of the device body, and the scraper ring slides up and down to automatically wipe the attachments adhering to the inner wall of the device body; and, an array of several cooperating blades is arranged on the inner wall of the scraper ring, wherein the cooperating blades are used to utilize the rotational power of the stirring liquid to drive the scraper ring to slide upward along the inner wall of the device body; The stirring member comprises: A drive shaft is rotatably mounted on the device body; The mating rotating shaft is arranged inside the main body of the device, one end of which is connected to the driving shaft, and a plurality of stirring blades are arranged on the mating rotating shaft; a reversing vibration mechanism is arranged between the driving shaft and the mating rotating shaft; the reversing vibration mechanism includes driving rods symmetrically arranged on both sides of the driving shaft, a rotating member arranged on the top of the mating rotating shaft, a first vibration mechanism and a second vibration mechanism; four rotating members, two of which form a group of reversing structures, and the second vibration mechanism and the first vibration mechanism are respectively arranged on both sides of the reversing structure; the rotating member includes a rotating end and a movable end, and the rotating end of the rotating member is rotatably mounted on the mating rotating shaft through a torsion spring; an interference groove is provided at the movable end of the rotating member, and the two movable ends of the rotating members in the reversing structure are arranged opposite to each other, and the interference groove is provided for the driving rod to contact the interference groove to drive the mating rotating shaft to rotate; the mating rotating shaft is elastically rotatably mounted on the driving shaft; the first vibration mechanism and the second vibration mechanism have the same structure, and both are arranged in a wave structure; and a power assembly, which is arranged on the device body and is used to drive the driving shaft to rotate back and forth, and one end of the driving shaft is transmission-connected to the power assembly.

2. The quantitative mixing device for preparing polyaluminium chloride according to claim 1, wherein: The vertical cross section of the matching blade includes a first end and a second end, wherein the first end is arranged close to the wall of the device body, and the second end is arranged lower than the first end.

3. The quantitative mixing device for preparing polyaluminium chloride according to claim 2, wherein: The outer array of the scraper ring is provided with a sliding rod, and the sliding rod is slidably arranged in a guide sliding groove on the wall of the device body.

4. The quantitative mixing device for preparing polyaluminium chloride according to claim 3, wherein: A first rotating ring is elastically and rotatably provided inside the scraper ring, and the matching blades are fixedly mounted on the first rotating ring.

5. The quantitative mixing device for preparing polyaluminium chloride according to claim 1, wherein: The driving shaft and the matching rotating shaft are elastically rotatably mounted via a first elastic member and a second rotating ring. The second rotating ring is rotatably mounted on the matching rotating shaft. Both ends of the first elastic member are fixedly mounted on the driving shaft and the second rotating ring respectively.

6. The quantitative mixing device for preparing polyaluminium chloride according to claim 1, wherein: The device body is also provided with a material delivery pipeline, and the material delivery pipeline is provided with a flow meter.

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