Double-shaft counter-rotating strong-shearing vertical stirring tank

Abstract

The utility model belongs to the field of solid-liquid mixing equipment, and discloses a double-shaft counter-rotating strong-shearing vertical stirring tank, which is characterized in that two groups of stirring shafts are arranged in a tank body, a plurality of groups of stirring blade groups are connected onto the stirring shafts through connecting holes, and each stirring blade group comprises a fixing ring, stirring blades and connecting bolts; the two opposite sides of the fixing ring are each provided with a counter bore, the two counter bores penetrate through the ring wall of the fixing ring, and the axes of the two counter bores coincide. The connecting bolt comprises a male head and a female head, the male head and the female head are respectively provided with an external thread and an internal thread which are matched with each other, and the male head and the female head respectively penetrate through the two counterbores and extend into the internal threads of the connecting holes to be screwed tightly so as to connect the fixing ring with the stirring shaft. A double-shaft vertical stirring design is adopted, the stirring blades on the double shafts are in a staggered overlapping or equidistant parallel state, the stirring blades rotate oppositely and forcibly shear a stirred medium, materials are stirred more efficiently, more homogenized slurry is prepared through stirring, and the stirring device is suitable for preparing homogenized slurry through mixing of dehydrated aggregate and / or dry aggregate.

Description

Technical Field

[0001] The utility model relates to the field of solid-liquid mixing equipment, in particular to a double-axis counter-rotating strong shear vertical stirring tank. Background Art

[0002] The key technology for slurry mixing and homogenization has always been the mixing and homogenization of dehydrated fine aggregate and water, filter press agglomerated tailings groups and water, binder powder, tailings slurry and water.

[0003] The vertical mixing tank adopts single-axis mixing, which has a small disturbance range. The mixing blades drive the stirred slurry to rotate together, and the mixing efficiency is poor. The diameter of the mixing blades is small, the range of stirring disturbance is small, and there are dead corners near the periphery and corners of the mixing barrel. For this reason, double-axis agitators came into being.

[0004] However, the stirring blades of the existing double-shaft stirrers are mostly fixed by bolts or welding, and the stirring blades in the middle of the stirring shaft are mostly connected and fixed by interference fit, which makes the disassembly and replacement of the stirring blades more complicated. Utility Model Content

[0005] In view of the above problems, the utility model provides a double-axis counter-rotating strong shear vertical stirring tank, in which the stirring blades counter-rotate to force shearing of the stirred medium, and the two shafts work together to achieve efficient stirring of materials to prepare a more homogeneous slurry. In addition, the double-axis counter-rotating strong shear vertical stirring tank is easy to replace and adjust the size and / or height of the stirring blades, so that the stirring blades on the two shafts are in a staggered overlapping or equidistant parallel state to meet the stirring requirements of different materials.

[0006] The technical solution of the utility model is as follows:

[0007] A double-shaft counter-rotating strong shear vertical stirring tank, comprising a tank body and two groups of stirring components, wherein the stirring components comprise a motor, a reducer and a bearing seat arranged at the top of the tank body, a stirring shaft arranged inside the tank body and a plurality of stirring blade groups installed on the stirring shaft, a feeding and unloading port is arranged at the top of the tank body, and a discharging port is arranged at the bottom of the tank body;

[0008] The stirring shaft is provided with a plurality of groups of connecting holes extending transversely therethrough from top to bottom, the number of the connecting holes being N times the number of the stirring blade groups, where N is a positive integer greater than or equal to 2;

[0009] The stirring blade assembly includes a fixing ring, a stirring blade and a connecting bolt; the inner diameter of the fixing ring is adapted to the shaft diameter of the stirring shaft, and a countersunk hole is respectively provided on opposite sides of the fixing ring, and the two countersunk holes penetrate the ring wall of the fixing ring and the axes coincide with each other;

[0010] The stirring blade is connected to the outside of the fixing ring;

[0011] The connecting bolt comprises a male head and a female head, and the male head and the female head are respectively provided with external threads and internal threads that match each other. The male head and the female head respectively pass through two countersunk holes and extend into the internal threads of the connecting hole and are tightened to connect the fixing ring to the stirring shaft.

[0012] The working principle of the above technical solution is as follows:

[0013] The utility model adopts a detachable and movable arrangement for the stirring blade group and the stirring shaft, and sets more groups of connection holes. By installing the stirring blade group at the connection holes at different positions, two arrangements of stirring blades can be realized. For example, select a plurality of groups of connection holes with corresponding heights on two groups of stirring shafts to install the stirring blade group, and select a stirring blade group of appropriate size according to the requirement that the spacing between the two shafts is greater than twice the length of the stirring blades, so that the stirring blades between the two shafts are arranged parallel to each other at equal distances in height, and the rotating cylinders of the stirring blades on the two shafts have no overlapping parts. This arrangement of stirring blades is suitable for mixing and homogenizing between solid bulk materials (such as dehydrated tailings bulk, solid particle bulk or binder powder, etc.) and liquid materials (such as concentrated water, tailings slurry or other liquid materials);

[0014] In addition, several groups of connecting holes with height differences on the two groups of stirring shafts are selected to install the stirring blade group, and the stirring blade group of appropriate size is selected according to the requirement that the distance between the two shafts is less than twice the length of the stirring blade, so that the stirring blades between the two shafts are staggered in height, and the rotating cylindrical surfaces of the stirring blades on the two shafts have overlapping parts to form a counter-rotating strong shear zone. This arrangement of stirring blades is suitable for mixing and homogenizing between solid group materials (such as dehydrated tailings groups or solid particle groups, etc.) and liquid materials (such as concentrated water, tailings slurry or other liquid materials).

[0015] In addition, by installing the stirring blade groups on the connecting holes at different heights on the stirring shaft, the height spacing between two adjacent stirring blade groups can be adjusted, making the stirring tank of the utility model more widely applicable.

[0016] In a further technical solution, a rubber gasket is provided on the inner side of the fixing ring.

[0017] In a further technical solution, the stirring blade group located at the bottom layer of the stirring shaft is a stirring bottom cleaning blade group, and the two groups of stirring bottom cleaning blade groups on the stirring shaft are at the same height.

[0018] In a further technical solution, the maximum expanded outer diameter of the female head is greater than the inner diameter of the connecting hole.

[0019] In a further technical solution, the distance between the stirring blade and the inner wall of the tank body is less than or equal to 200 mm.

[0020] In a further technical solution, the spacing between two adjacent groups of connecting holes is 200mm-500mm.

[0021] In a further technical solution, the two groups of motors rotate in opposite directions, and the two groups of motors rotate at equal speeds or at differential speeds.

[0022] In a further technical solution, the stirring blade is a paddle-type blade or a rod-type blade.

[0023] In a further technical solution, the stirring blade is detachably connected to the fixing ring.

[0024] In a further technical solution, an overflow port is provided at the top of the tank body.

[0025] The beneficial effects of the utility model are:

[0026] 1. The utility model is convenient for replacing and adjusting the size and / or height of the stirring blades, so that the stirring blades on the double shafts are in a staggered overlapping or equidistant parallel state to meet the stirring requirements of different materials;

[0027] 2. The distance between the stirring blade and the inner wall of the stirring tank is small, which can achieve stirring without dead angles and solve the problem of material accumulation in the tank;

[0028] 3. The rotation directions of the two shafts are opposite, and the stirred materials are forced to be sheared and homogenized between the two shafts;

[0029] 4. A stirring and bottom-cleaning blade group is set up to stir and homogenize the materials accumulated at the bottom of the mixing tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The stirring blade arrangement state of the double-axis counter-rotating strong shear vertical stirring tank described in the embodiment of the utility model is Figure 1 ;

[0031] Figure 2 The stirring blade arrangement state of the double-axis counter-rotating strong shear vertical stirring tank described in the embodiment of the utility model is Figure 2 ;

[0032] Figure 3 It is a structural schematic diagram of the stirring blade group described in the embodiment of the utility model;

[0033] Figure 4 yes Figure 3 The schematic diagram of the structure of the stirring blade group at part A is shown in FIG.

[0034] Description of reference numerals:

[0035] 01. Electric motor; 02. Speed ​​reducer; 03. Bearing seat; 04. Fixing ring; 05. Stirring shaft; 06. Stirring blade; 07. Tank body; 08. Stirring and bottom cleaning blade; 09. Male connector; 10. Female connector; 11. Rubber gasket; 12. Countersunk hole. DETAILED DESCRIPTION

[0036] The embodiments of the present utility model will be further described below in conjunction with the accompanying drawings.

[0037] Example:

[0038] A double-axis counter-rotating strong shear vertical mixing tank is applicable to: mixing and homogenizing the dehydrated tailings bulk or group with concentrated water; mixing and homogenizing the tailings slurry with binder powder; mixing and homogenizing the dehydrated tailings bulk or group, concentrated water and binder; and mixing and homogenizing the liquid and solid particle bulk or group materials.

[0039] like Figure 1 and Figure 2 As shown, the stirring tank includes a tank body 07 and two groups of stirring components. The stirring components include a motor 01, a reducer 02 and a bearing seat 03 arranged on the top of the tank body 07, a stirring shaft 05 arranged inside the tank body 07 and a plurality of stirring blade groups installed on the stirring shaft 05. A feeding and unloading port is provided at the top of the tank body 07, and a discharging port is provided at the bottom of the tank body 07.

[0040] The stirring shaft 05 is provided with a plurality of groups of connecting holes extending transversely from top to bottom, and the number of the connecting holes is twice the number of the stirring blade groups;

[0041] The stirring blade assembly includes a fixing ring 04, a stirring blade 06 and a connecting bolt; the inner diameter of the fixing ring 04 is adapted to the shaft diameter of the stirring shaft 05, and a countersunk hole 12 is respectively provided on opposite sides of the fixing ring 04, and the two countersunk holes 12 penetrate the ring wall of the fixing ring 04 and the axes coincide with each other;

[0042] The stirring blade 06 is connected to the outside of the fixing ring 04;

[0043] The connecting bolt includes a male head 09 and a female head 10, wherein the female head 10 is an expansion female head, and the male head 09 and the female head 10 are respectively provided with external threads and internal threads that match each other. The male head 09 and the female head 10 respectively pass through two countersunk holes 12 and extend into the internal threads of the connecting hole and are tightened to connect the fixing ring 04 with the stirring shaft 05.

[0044] The utility model adopts a detachable movable arrangement for the stirring blade group and the stirring shaft 05, and sets more groups of connection holes. By installing the stirring blade group at the connection holes at different positions, two arrangements of the stirring blades 06 can be realized. For example, a plurality of groups of connection holes with corresponding heights on two groups of stirring shafts 05 are selected to install the stirring blade group, and a stirring blade group of appropriate size is selected according to the requirement that the spacing between the two shafts is greater than twice the length of the stirring blade 06, so that the stirring blades 06 between the two shafts are arranged in parallel with each other at equal distances in height, and the rotating cylinders of the stirring blades 06 on the two shafts have no overlapping parts. The specific arrangement state is as follows: Figure 2 As shown, this arrangement of the stirring blades 06 is suitable for mixing and homogenizing solid bulk materials (such as dehydrated tailings bulk, solid particle bulk or binder powder, etc.) and liquid materials (such as concentrated water, tailings slurry or other liquid materials);

[0045] In addition, several groups of connecting holes with height difference on the two groups of stirring shafts 05 are selected to install the stirring blade group, and the stirring blade group of appropriate size is selected according to the requirement that the distance between the two shafts is less than twice the length of the stirring blade 06, so that the stirring blades 06 between the two shafts are staggered in height, and the rotating cylinders of the stirring blades 06 on the two shafts have overlapping parts, forming a counter-rotating strong shear zone. The specific arrangement state is as follows Figure 1 As shown, this arrangement of the stirring blades 06 is suitable for mixing and homogenizing solid group materials (such as dehydrated tailings groups or solid particle groups, etc.) and liquid materials (such as concentrated water, tailings slurry or other liquid materials).

[0046] In addition, by installing the stirring blade groups on the connection holes at different heights on the stirring shaft 05, the height spacing between two adjacent stirring blade groups can be adjusted, making the stirring tank of the utility model more widely applicable.

[0047] In another embodiment, if Figure 4 As shown, a rubber gasket 11 is provided on the inner side of the fixing ring 04 to seal and clamp the gap between the fixing ring 04 and the stirring shaft 05, reduce the relative movement between the fixing ring 04 and the stirring shaft 05, ensure the connection between the fixing ring 04 and the stirring shaft 05 is stable and reduce wear.

[0048] In another embodiment, if Figure 1 and Figure 2 As shown, the stirring blade group located at the bottom layer of the stirring shaft 05 is a stirring bottom cleaning blade group 08, and the stirring bottom cleaning blades 08 on the two groups of stirring shafts 05 are at the same height.

[0049] In another embodiment, the maximum expanded outer diameter of the female head 10 is larger than the inner diameter of the connecting hole, so as to facilitate the stable connection of the fixing ring 04 to the stirring shaft 05 .

[0050] In another embodiment, the distance between the stirring blade 06 and the inner wall of the tank body 07 is less than or equal to 200 mm, and the distance between the stirring and bottom cleaning blade group 08 and the inner bottom surface of the tank body 07 is also less than or equal to 200 mm. The small distance can achieve stirring without dead angles and solve the problem of material accumulation in the tank body 07.

[0051] In another embodiment, the distance between two adjacent groups of connection holes is 200 mm-500 mm.

[0052] In another embodiment, the two groups of motors 01 rotate in opposite directions, and the two groups of motors 01 rotate at equal speeds or at differential speeds.

[0053] In another embodiment, the stirring blade 06 is a paddle-type blade or a rod-type blade.

[0054] In another embodiment, the stirring blade 06 is detachably connected to the fixing ring 04 .

[0055] In another embodiment, an overflow port is provided at the top of the tank body 07 .

[0056] The above-mentioned embodiments only express the specific implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A double-shaft counter-rotating strong shear vertical stirring tank, comprising a tank body and two groups of stirring components, wherein the stirring components include a motor, a reducer and a bearing seat arranged at the top of the tank body, a stirring shaft arranged inside the tank body and a plurality of stirring blade groups installed on the stirring shaft, characterized in that: The stirring shaft is provided with a plurality of groups of connecting holes extending transversely therethrough from top to bottom, the number of the connecting holes being N times the number of the stirring blade groups, where N is a positive integer greater than or equal to 2; The stirring blade assembly includes a fixing ring, a stirring blade and a connecting bolt; the inner diameter of the fixing ring is adapted to the shaft diameter of the stirring shaft, and a countersunk hole is respectively provided on opposite sides of the fixing ring, and the two countersunk holes penetrate the ring wall of the fixing ring and the axes coincide with each other; The stirring blade is connected to the outside of the fixing ring; The connecting bolt comprises a male head and a female head, and the male head and the female head are respectively provided with external threads and internal threads that match each other. The male head and the female head respectively pass through two countersunk holes and extend into the internal threads of the connecting hole and are tightened to connect the fixing ring to the stirring shaft.

2. The dual-axis counter-rotating strong shear vertical stirred tank according to claim 1, characterized in that: A rubber gasket is arranged on the inner side of the fixing ring.

3. The dual-axis counter-rotating strong shear vertical stirred tank according to claim 1, characterized in that: The stirring blade group located at the bottom layer of the stirring shaft is a stirring bottom cleaning blade group, and the two groups of stirring bottom cleaning blade groups on the stirring shaft are at the same height.

4. The dual-axis counter-rotating strong shear vertical stirred tank according to claim 1, characterized in that: The maximum expanded outer diameter of the female head is greater than the inner diameter of the connecting hole.

5. The dual-axis counter-rotating strong shear vertical stirred tank according to claim 1, characterized in that: The distance between the stirring blade and the inner wall of the tank body is less than or equal to 200 mm.

6. The dual-axis counter-rotating strong shear vertical stirred tank according to claim 1, characterized in that: The spacing between two adjacent groups of connection holes is 200mm-500mm.

7. The dual-axis counter-rotating strong shear vertical stirred tank according to claim 1, characterized in that: The two groups of motors rotate in opposite directions, and the two groups of motors rotate at equal speed or differential speed.

8. The dual-axis counter-rotating strong shear vertical stirred tank according to claim 1, characterized in that: The stirring blade is a paddle blade or a rod blade.

9. The dual-axis counter-rotating strong shear vertical stirred tank according to claim 1, characterized in that: The stirring blade is detachably connected to the fixing ring.

10. The dual-axis counter-rotating strong shear vertical stirred tank according to claim 1, characterized in that: An overflow port is arranged on the top of the tank body.

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