Vertical type detachable hinge double-helical-ribbon stirring paddle

Abstract

The invention belongs to the technical field of stirring and mixing of Newtonian fluid and non-Newtonian fluid, and relates to a vertical detachable hinge double-helical-ribbon stirring paddle which comprises a transmission shaft, double-hinge helical ribbon paddles, a connecting sleeve and a connecting rod. The sleeve is installed on the transmission shaft, one end of the connecting rod is fixedly connected with the outer wall of the sleeve, and the other end of the connecting rod is a stepped shaft and is detachably connected with the casing pipe structure of the double-hinge helical ribbon through a bolt assembly. And the sections of the double-hinge helical ribbon blades are designed into inclined N-shaped hinges. Due to the design of the hinges, the shearing performance and the mixing driving force of the paddles are improved, and materials can form a complex three-dimensional flowing path in the stirring process, so that more uniform mixing is realized. The hinge structure can also effectively push the materials in the stirring central area to the edge, and meanwhile, the materials on the edge are brought into the center, so that the overall mixing effect of the materials is further improved. The stirrer is suitable for stirring and mixing various materials in the industries of chemical engineering, pharmaceutical macromolecules and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of stirring and mixing Newtonian fluids and non-Newtonian fluids, and in particular relates to a vertical detachable folding blade double-screw stirring impeller. Background Art

[0002] The agitator is the main tool used for stirring during the mixing process. It is the most important component in the mixing equipment and plays the main role. Agitators with different structural forms can produce different forms of action during the mixing process, causing the materials to produce different flow forms.

[0003] According to the different flow forms, the impellers are divided into axial flow impellers and radial flow impellers. Conventional radial flow impellers include anchor type, paddle type, turbine type, frame type, etc., while axial flow impellers include propeller type, ribbon type and screw type. When the height-diameter ratio of the stirring device is large, multi-layer impellers can be used, or combined impellers can be used according to actual production needs.

[0004] In the current existing technology, since the structure of the twin-ribbon impeller is usually fixed, the stirring form of the impeller is fixed, and the improvement of its mixing performance only lies in the adjustment of the blade width and pitch.

[0005] Traditional impellers often have problems such as uneven stirring, poor adaptability to materials, and low energy utilization. For example, during the stirring process of a common single-ribbon impeller, the material easily forms a circulation around the stirring shaft, resulting in poor mixing effect between the center and edge areas of the stirring material.

[0006] Some common twin-screw impellers have a relatively simple screw structure design and cannot effectively meet the mixing requirements of materials with different viscosities, densities and particle sizes. With the continuous development of industrial production, the performance requirements for impellers are getting higher and higher. A folding blade screw impeller that can mix materials more efficiently and evenly and can adapt to various working conditions is needed. Summary of the invention

[0007] The purpose of the present invention is to provide a vertical detachable folding blade double-screw impeller to solve the problems of uneven stirring, poor material adaptability and low energy utilization of existing double-screw impellers, thereby improving the stirring effect and production efficiency and meeting the high quality requirements of material stirring and mixing in different industries. The present invention is particularly suitable for stirring and mixing operations of various materials in the chemical, pharmaceutical polymer and other industries, aiming to improve the stirring efficiency, mixing uniformity and adapt to different material characteristics and stirring process requirements.

[0008] In order to achieve the above purpose, this application adopts the following technical solutions:

[0009] A vertical detachable folding blade double-screw belt stirring impeller comprises a transmission shaft 1, double-folding blade screw belt blades 3, a connecting sleeve 2 and a connecting rod 4.

[0010] The transmission shaft 1 has a keyway 101 at its top end according to the shaft diameter and the transmitted torque, and is connected to the driving motor through a coupling and a flat key, and the motor provides power to drive the stirring paddle to rotate; the transmission shaft 1 is provided with a plurality of evenly spaced, axial through holes a102, and the connecting sleeve 2 is provided with a transverse sleeve through hole 201, and the connecting sleeve 2 is installed on the transmission shaft 1 through the cooperation of the bolt assembly a5 with the axial through hole a102 and the sleeve through hole 201.

[0011] The number of the connecting sleeves 2 is the same as the number of the axial through holes a102; a horizontally arranged connecting rod 4 is symmetrically fixedly connected to each of the two sides of the connecting sleeve 2; one end of the connecting rod 4 is fixedly connected to the outer wall of the connecting sleeve 2, and the other end is a stepped shaft, on which a radial through hole 401 is provided; a plurality of connecting sleeves are symmetrically provided at both ends and the middle part of the double-folded screw blade 3, and the number of the connecting sleeves is consistent with the number of the connecting rod 4; the connecting sleeve on the double-folded screw blade 3 is fixed to the stepped shaft of the connecting rod 4 by the cooperation of the bolt assembly b6 and the radial through hole 401, and an axial through hole b402 is also provided on the connecting sleeve, and the double-folded screw blade 3 is further fixed to the connecting rod 4 by the cooperation of the gasket 7 and the bolt 8 with the axial through hole b402.

[0012] The double-folded spiral ribbon blade 3 is a symmetrical structure, including two spiral ribbons, which are arranged symmetrically around the stirring shaft.

[0013] The double-folded-leaf spiral ribbon paddle 3 is placed in a cylindrical kettle when in use, the ratio of the outer diameter of the spiral ribbon to the inner diameter of the kettle body is 0.9-0.95, the pitch is consistent with the outer diameter of the spiral ribbon, the total height of the spiral ribbon is 1.5 times the pitch, the width of the spiral ribbon is 0.1 times the inner diameter of the kettle body, and the thickness δ of the double-folded-leaf spiral ribbon paddle 3 is 0.1-0.15 times the width of the spiral ribbon.

[0014] The double-folded spiral belt paddle 3 has a cross-section of each spiral belt that adopts a folded leaf design. The folded leaf is in a three-fold form and has an inclined "N" shape. The width ratio of the three-folded part of the spiral belt is adjustable, the middle is long and the two ends are short, the cross-section angle α is 145° to 155°, and the total width C of the double-folded spiral belt paddle 3 is twice the thickness δ.

[0015] The distance between two adjacent connecting rods 4 is 0.5 times the spiral pitch; the distance between two adjacent axial through holes a102 is 0.5 times the spiral pitch.

[0016] The inner diameter of the connecting sleeve 2 is the same as the diameter of the transmission shaft 1 , the outer diameter of the connecting sleeve 2 is twice the diameter of the transmission shaft 1 , and the height of the connecting sleeve 2 is the same as the outer diameter.

[0017] The transmission shaft 1 and the connecting rod 4 are stepped shafts.

[0018] Beneficial effects of the present invention:

[0019] Compared with the existing technology, the folding blade design of the spiral ribbon of this vertical detachable folding blade double-spiral stirring paddle improves the shear performance and mixing driving force of the blade to a certain extent, and can form a complex three-dimensional flow path for the material during the mixing process, thereby achieving faster and more uniform mixing.

[0020] The folding blade structure can also effectively push the materials in the mixing center area to the edge, and at the same time bring the materials at the edge into the center, further improving the overall mixing effect of the materials and improving the mixing uniformity.

[0021] For fluid materials with different viscosities, densities and rheological properties, the stirring paddle of the present invention can be adapted by adjusting the stirring speed and the parameters of the spiral ribbon (such as pitch, width, folding blade ratio and inclination angle, etc.). For example, for high-viscosity materials, a wider spiral ribbon can provide greater stirring thrust to ensure that the materials can be fully mixed; for low-viscosity materials, the stirring speed can be appropriately increased, and the shear force and turbulence effect generated by the folding blade structure can be used to achieve rapid and uniform stirring. At the same time, the design of the folding blade spiral ribbon structure further improves the mixing performance of the blade and improves energy utilization.

[0022] At the same time, the detachable connection structure between the ribbon blades and the connecting rod reduces the cost of equipment replacement and maintenance, and can more conveniently replace blades of different forms according to material forms and requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is an isometric schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a partial cross-sectional view of the present invention;

[0025] Figure 3 It is a left side view of the overall structure of the present invention;

[0026] Figure 4 It is a front view of the overall structure of the present invention;

[0027] Figure 5 It is a structural schematic diagram of the main component of the hinged leaf spiral belt in the present invention;

[0028] Figure 6 It is a schematic diagram of the cross-sectional dimensions of the main component of the hinged leaf spiral belt in the present invention;

[0029] Figure 7 It is a schematic diagram of the left and right isometric angles of an example device for use of the present invention;

[0030] Figure 8It is a partial cross-sectional enlarged view of an example device of the present invention.

[0031] In the figure: 1-transmission shaft, 2-connecting sleeve, 3-double-hinged screw blade, 4-connecting rod, 5-bolt assembly a, 6-bolt assembly b, 7-gasket, 8-bolt, 101-keyway, 102-axial through hole a, 201-sleeve through hole, 301-blade radial through hole, 401-radial through hole, 402-axial through hole b;

[0032] 9-driving motor, 10-bearing chamber, 11-kettle cover, 12-kettle flange, 13-reactor body, 14-bracket, 15-head, 16-ear support, 17-inlet pipe and flange, 18-coupling, 19-round nut and brake pad combination structure, 20-bearing, 21-rotating lip seal, 22-bearing spacer, 23-bearing end cover, 24-shaft sleeve. DETAILED DESCRIPTION

[0033] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and technical solutions.

[0034] This embodiment provides a vertical detachable folding blade double-spiral belt stirring impeller, the structure of which is as follows Figures 1 to 6 shown.

[0035] The vertical detachable folding blade double-screw impeller in this embodiment includes a transmission shaft 1, double-folding blade screw blades 3, a connecting sleeve 2 and a connecting rod 4, and is also provided with a bolt assembly a5, a bolt assembly b6, a bolt 8 and a gasket 7 for connecting and fixing.

[0036] The transmission shaft 1 is a stepped shaft with a keyway 101 on the upper end, which is connected to the driving motor through a coupling and a flat key, and the motor provides power to drive the stirring paddle to rotate; four axial through holes a102 with a spacing of 0.5 times the pitch of the screw thread are opened at appropriate positions on the lower end, and a transverse connecting sleeve through hole 201 is provided on the connecting sleeve 2. The connecting sleeve 2 is installed on the transmission shaft 1 through the cooperation of the bolt assembly a5 with the axial through hole a102 and the sleeve through hole 201. A clearance fit is adopted between the two shafts, and a local plane is milled near the sleeve through hole 201 to facilitate bolt connection.

[0037] The transmission shaft 1 is a stepped shaft made of high-strength stainless steel, which has good rigidity and corrosion resistance and can adapt to the different physical properties of fluid materials, such as viscosity and corrosiveness. Its diameter can be designed according to the inner diameter of the kettle body of the stirring equipment, or the material can be selected according to the size of the actual scene and the transmission requirements for reasonable design and strength verification.

[0038] The inner diameter of the connecting sleeve 2 is the same as the diameter of the transmission shaft 1, the outer diameter is twice the diameter of the transmission shaft, the height is the same as the outer diameter, and the through hole size meets the standard of the bolt hole size.

[0039] The double-folded spiral ribbon blade 3 is a double-folded spiral ribbon, and the two spiral ribbons are symmetrically distributed. When in use, they are placed in a cylindrical kettle. The ratio of the outer diameter of the spiral ribbon to the inner diameter of the kettle body is 0.9 to 0.95, the pitch is equal to the outer diameter of the spiral ribbon, the total height of the spiral ribbon is 1.5 times the pitch, the width of the spiral ribbon is 0.1 times the inner diameter of the kettle body, and the thickness δ of the double-folded spiral ribbon blade 3 is 0.1 to 0.15 times the width of the spiral ribbon. Figure 4-5 As shown, the cross-section of each spiral belt adopts a folding leaf design, and the folding leaf is in a three-fold form, and the shape is an inclined "N" shape. The width ratio of the three-fold part of the spiral belt is 1:2:1, the middle is long and the two ends are short, the cross-sectional folding angle α is 150°, and the total width C of the double-folded spiral belt blade 3 is twice the thickness δ.

[0040] The connection between the symmetrical double-blade spiral ribbon impeller 3 and the connecting rod 4 is a circular connecting sleeve, and the connecting sleeve is provided with an axial through hole b402. When installing, it is first assembled and then connected and fixed with a bolt assembly b6, bolts 8 and gaskets 7.

[0041] The connecting sleeve 2 and the double-bend spiral belt stirring paddle 3 are connected by four layers of connecting rods 4 connected by welding. The connecting rods 4 of each layer are spaced 0.5 times of the pitch, and two connecting rods 4 are evenly and symmetrically distributed in each layer.

[0042] The usage and working process are as follows:

[0043] Figure 7 and Figure 8 The use example of the vertical detachable folding blade double-screw belt agitator of the present invention is demonstrated. In this example, the agitator is applied to a polymerization reactor mixing system, including vertical detachable folding blade double-screw belt agitator structures 1 to 8, a drive motor 9, a bearing chamber 10, a kettle cover plate 11, a kettle flange 12, a reactor body 13, a bracket 14, a head 15, an ear-type support 16, an inlet pipe and a flange 17 and other matching bolt assemblies. The reactor body 13 is fixedly connected to the head 15 and connected and fixed to the bracket 14 through a bolt assembly, while the ear-type support 16 is fixedly connected to the kettle body 13 and is secondary fixed to the bracket 14 through a bolt assembly. The kettle flange 12 is fixedly connected to the kettle body 13 and connected and fixed to the kettle cover plate 11 through a bolt assembly. The bearing chamber 10 is connected and fixed to the motor and the kettle cover plate 11 through a bolt assembly.

[0044] When in use, one end of the connecting rod 4 is symmetrically fixed on the connecting sleeve 2, and the connecting sleeve 2 is connected to the stirring shaft 1 through the bolt assembly a5. Then the stirring paddle 3 is sleeved on the other end of the connecting rod 4 through the connecting sleeve, and axially fixed by the bolt assembly b6 to prevent the paddle from falling off, and then radially fixed by the gasket 7 and the bolt 8 to prevent the paddle from rotating circumferentially when rotating. The stirring shaft 1 is fixed by a pair of bearings 20 installed in the bearing chamber 10. The bearing 20 is fixed by the bearing end cover 23, the bearing spacer 22, the shaft sleeve 24 and the round nut and brake gasket combination structure 19, and the lower part is sealed by the rotating lip seal 21. When working, the material to be mixed is injected through the inlet pipe, and the driving motor drives the stirring paddle to rotate through the coupling 18. The complex folding design of the double-folding blade helical belt paddle 3 can form a complex flow field in the kettle to achieve rapid and uniform mixing. If the blade structure needs to be replaced according to material properties or mixing requirements, the bolt assembly connecting the kettle cover 11 and the kettle flange 12 can be removed, the stirring blade can be taken out, the bolt assembly for radial and axial fixation at the blade sleeve can be removed, the original double-folding blade spiral belt blade 3 can be removed, and a new double-folding blade spiral belt blade 3 can be replaced.

Claims

1. A vertical detachable folding blade double-ribbon impeller, characterized in that: The vertical detachable folding blade double-screw belt stirring paddle comprises a transmission shaft (1), double-folding blade screw belt blades (3), a connecting sleeve (2) and a connecting rod (4). The transmission shaft (1) has a keyway (101) at its top end according to the shaft diameter and the transmitted torque, and is connected to the driving motor through a coupling and a flat key, and the stirring paddle is driven to rotate by the power provided by the motor; the transmission shaft (1) is provided with a plurality of evenly spaced, axial through holes a (102), and the connecting sleeve (2) is provided with a transverse connecting sleeve through hole (201), and the connecting sleeve (2) is installed on the transmission shaft (1) by the cooperation of the bolt assembly a (5) with the axial through hole a (102) and the sleeve through hole (201). The number of the connecting sleeves (2) is the same as the number of the axial through holes a (102); a horizontally arranged connecting rod (4) is symmetrically fixedly connected to each of the two sides of the connecting sleeve (2); one end of the connecting rod (4) is fixedly connected to the outer wall of the connecting sleeve (2), and the other end is a stepped shaft, on which a radial through hole (401) is provided; a plurality of connecting sleeves are symmetrically provided at both ends and the middle of the double-folded screw blade (3), and the number of the connecting sleeves is consistent with the number of the connecting rod (4); the connecting sleeve on the double-folded screw blade (3) is fixed to the stepped shaft of the connecting rod (4) by the cooperation of the bolt assembly b (6) and the radial through hole (401), and the sleeve is also provided with an axial through hole b (402), and the double-folded screw blade (3) is further fixed to the connecting rod (4) by the cooperation of the gasket (7) and the bolt (8) with the axial through hole b (402).

2. A vertical detachable folding blade double-ribbon impeller according to claim 1, characterized in that: The double-folded spiral ribbon blade (3) is a symmetrical structure, comprising two spiral ribbons which are arranged symmetrically around the stirring shaft.

3. A vertical detachable folding blade double-ribbon impeller according to claim 2, characterized in that: The double-folded spiral ribbon blade (3) is placed in a cylindrical kettle when in use, the ratio of the outer diameter of the spiral ribbon to the inner diameter of the kettle body is 0.9-0.95, the pitch is consistent with the outer diameter of the spiral ribbon, the total height of the spiral ribbon is 1.5 times the pitch, the width of the spiral ribbon is 0.1 times the inner diameter of the kettle body, and the thickness δ of the double-folded spiral ribbon blade (3) is 0.1-0.15 times the width of the spiral ribbon.

4. A vertical detachable folding blade double-ribbon impeller according to claim 2, characterized in that: The double-folded spiral ribbon blade (3) has a cross-section of each spiral ribbon that adopts a folded leaf design. The folded leaf is in a three-fold form and has an inclined N-shape. The width ratio of the three-folded portion of the spiral ribbon is adjustable.

5. The vertical detachable folding blade double-ribbon impeller according to claim 2, characterized in that: The total width C of the double-folded blade helical ribbon blade (3) is twice the thickness δ.

6. A vertical detachable folding blade double-ribbon impeller according to claim 2, characterized in that: The double-folded blade spiral blade (3) has a cross-sectional fold angle α of 145° to 155°.

7. A vertical detachable folding blade double-ribbon impeller according to claim 2, characterized in that: The distance between two adjacent connecting rods (4) is 0.5 times the helical pitch; and the distance between two adjacent axial through holes a (102) is 0.5 times the helical pitch.

8. The vertical detachable folding blade double-ribbon impeller according to claim 1, characterized in that: The inner diameter of the connecting sleeve (2) is the same as the diameter of the transmission shaft (1), the outer diameter of the connecting sleeve (2) is twice the diameter of the transmission shaft (1), and the height of the connecting sleeve (2) is the same as the outer diameter.

9. The vertical detachable folding blade double-ribbon impeller according to claim 1, characterized in that: The transmission shaft (1) and the connecting rod (4) are stepped shafts.

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