The double helix cone mixer (double helix mixer) can be widely used in various industries such as chemical industry, battery raw materials, pigments, coatings, dyes, pesticides, pharmaceuticals, food, feed, additives, refractory materials, new materials, electronic plastics, rubber, ceramics, fertilizers, metallurgy, mining, dry powder mortar, special building materials, etc. for powder to powder, liquid to liquid, powder to liquid mixing, solid-liquid (i.e. adding liquid to powder) mixing. This machine has strong adaptability to mixtures: it will not produce overheating phenomenon for heat sensitive materials; Will not crush or grind granular materials; Mixing materials with significant differences in weight and particle size will not result in delamination or segregation; For the mixing of various particles, fibers, or sheet-like materials such as coarse particles, fine particles, and ultrafine powders, there is also a type of container fixed mixer called the double helix cone mixer. Compared with other mixers, the double helix cone mixer has the advantages of low installed power, wide adaptability to mixed materials, and no damage to mixed materials. It will not overheat thermosensitive materials, will not press feed or grind granular materials, and will not produce delamination or segregation when mixing materials with significant differences in weight and particle size. It also has good adaptability to the mixing of coarse, fine, and ultrafine particles (nanometer scale).

The machine is mainly composed of a transmission system, two inclined screws, a rotating arm, a cylinder, a discharge valve, etc. Two working screws are parallel to the generatrix of the conical cylinder, symmetrically distributed on both sides of the centerline of the cone, and intersect at the bottom of the cone, connected to the central rod. The upper parts of the two screws are connected to the transverse arms extending from the center to both sides, forming a mechanically symmetrical and balanced inverted triangular structure,

include:

(1) Transmission system: It has the self rotation motion of a spiral shaft and the revolving motion along the cylinder wall with the rotating arm. The revolution and rotation are transmitted separately, and both parts use fixed cycloidal pinwheel reducers with high speed ratio and efficiency. They are distributed and reversed through bevel gears and transmitted to the two rotating arms.

(2) Cylinder: The container of this machine is made into an inverted cone shape, with the purpose of ensuring sufficient material alternating circulation under the lifting effect of the screw. Therefore, the container must have an appropriate cone angle. Through production experience, usage conditions, and calculations, the basic size series, full volume, cone angle, and container height parameters of the "double helix cone mixer" have been determined.

(3) Rotating arm, central rod, and screw: The screw is composed of a screw and a spiral blade, and it is the direct working mechanism for mixing materials. In order to ensure the rigidity of the screw, reduce weight, and facilitate the welding of the spiral plate, a. 20 steel pipe is used for the screw in the design. Spiral blades are welded in a right-handed direction with a certain diameter and pitch. The upper end of the screw is connected to the cross arm, and the lower end is connected to the central pull rod, symmetrically on both sides. The connection form of this triangular symmetrical load-bearing component balances the force and improves the load-bearing state of the component. The lower end of the screw can be supported independently of the container by the central pull rod, without the need for a fixed bottom support structure at the bottom of the equipment.

(4) Discharge valve (displacement valve, plum blossom valve): The bottom bearing of the equipment has been removed, which is conducive to discharge. This machine is designed with a discharge valve consisting of two overlapping fan orifice plates. The valve has a simple structure, does not take up space, and the size of the discharge hole can be freely controlled. It is easy to operate, and the material can be completely discharged. It can also be easily disassembled and cleaned, which is beneficial for cleaning and repairing equipment. In summary, the double helix cone mixer has the advantages of not damaging particles, not overheating or deteriorating, and not separating or layering. Without damaging the mixture, it generates composite movements such as lifting, convection, shearing, and diffusion inside the cone, which can gently mix materials and achieve the desired mixing effect.

working principle:

The rapid rotation of two asymmetric spirals inside the mixer cylinder lifts the material upwards, forming two asymmetric spiral shaped material flows along the cylinder wall from bottom to top

The slow revolution of the rotating arm causes the material outside the spiral to enter the envelope of the screw to varying degrees. Some of the material is displaced and lifted, while others are thrown out of the screw, achieving continuous updating and diffusion of the material in all circumferential directions. The two streams of material lifted to the upper part then converge towards the central cavity, forming a downward material flow that supplements the bottom cavity and creates a triple mixing effect of convective circulation.

Structural characteristics of cycloidal pinwheel reducer model:

The structure of the cycloidal pin reducer is composed of a reducer, a cylinder cover, a cylinder body, a transmission part, a screw, a discharge valve, and other parts.

1. Reducer: planetary cycloidal pinwheel, two-stage, dual output shaft reducer, with two speeds of output revolution and rotation.

2. Cylinder cover part: The cylinder cover supports the entire transmission part, which is fixed to the cylinder cover with bolts. There are several openings on the cylinder cover for feeding, observation, cleaning, and maintenance backup.

3. Transmission part: The gear reducer, through the transmission distribution box, causes the rotating arm, transmission head, and screw to perform planetary revolution and self rotation movements.

4. Cylinder part: The cylinder has a conical structure, which allows for quick discharge, no accumulation of material, and no dead corners.

5. Spiral part: Two asymmetrically arranged propellers inside the cylinder rotate on their own and undergo planetary motion under the transmission of the distribution box, flipping the material within the range of the cylinder to quickly achieve uniform mixing.

6. Discharge valve: The discharge valve is installed at the bottom of the cylinder to control and discharge materials. The discharge valve of this machine can be in three forms: manual, pneumatic, and electric.

7. Spray device (optional): The spray device consists of pipe fittings and nozzle components, and is fixed on the cylinder cover.

Structural characteristics of worm gear and worm gear models: