RU182055U1 - Mixer for mixing explosive components - Google Patents

Abstract

The invention relates to screw machines, which are widely used in the chemical industry for mixing powdered and liquid-viscous materials. The mixer for mixing components contains a rotor with blades in the form of triangular prisms, a bearing assembly, a frame, a rotor drive, a mixing chamber with fingers on its inner surface that are installed in the mixing chamber, with the possibility of remote extraction from it using a remote finger extraction device with drive mechanisms in the form of hydrocylin firewood, and the rotation of the rotor from the housing is carried out along the axis of the apparatus. The use in the proposed design of the mixer of the device that remotely removes fingers from the internal cavity of the mixing chamber, allows the extension of the rotor along the axis of the apparatus.

Description

The utility model relates to screw machines, which are widely used in the chemical industry for mixing powdered and liquid-viscous materials.

Known single-screw devices for mixing and injection of polymers (McKelvey D.M. "Polymer Processing" M .: Chemistry, 1965 p. 246, Fig. 96) and (E. Bernhardt "Processing of thermoplastic materials" M .: Scientific and technical publishing house of chemical literature, 1962, p. 489 fig. 7, 12).

When processing explosive polymers for safety reasons, apparatus design sometimes provides for the possibility of remote extraction of the rotor from the mixing chamber at the end of the technological process for cleaning.

The known mixer according to the patent of the Russian Federation No. 2233824, which is used for mixing powdered and liquid-viscous components.

The mixer includes a mixing chamber, on the inner surface of which fingers are fixed, a rotor with blades in the form of triangular prisms, a rotor drive, a bearing assembly, and a frame. Such a mixer is adopted as a prototype.

The disadvantages of the prototype must include the complexity of the design of the apparatus in terms of disassembly for subsequent cleaning, because the mixing chamber on the inner surface has stationary fingers, and the rotor has blades made in the form of triangular prisms, which does not allow removing the rotor from the mixing chamber along the axis of the apparatus.

The technical problem to which the proposed utility model is directed is to simplify the design of the apparatus having a mixing chamber, on the inner surface of which there are fingers, and a rotor with blades, which are made in the form of triangular prisms, with the ability to extend the rotor from the mixing chamber along the axis of the apparatus .

The technical result is achieved in that the mixer for mixing the components contains a rotor with blades in the form of triangular prisms, a bearing assembly, a frame, a rotor drive, a mixing chamber, on the inner surface of which there are fingers that are installed in the mixing chamber, with the possibility of remote extraction from it with using a device for remote finger extraction with drive mechanisms in the form of hydraulic cylinders, and the rotor is extended from the housing along the axis of the apparatus.

The essence of the proposed utility model is illustrated by figures 1, 2, 3. In FIG. 1 schematically shows the design of the mixer. FIG. 2 shows a remote finger extraction device. In FIG. 3 is a cross-sectional view of a remote finger extraction device.

Where:

I is the rotor;

2- bearing assembly;

3- rotor drive;

4-coupling;

5- mixing chamber;

6- finger;

7 - loading branch pipe; 8, 9 - hydraulic cylinder;

10- strap;

II - hairpin;

12- ring;

13- gasket.

The main working unit of the mixer (Fig. 1) is a cantilever rotor 1, equipped with triangular prismatic blades with an apex directed towards the discharge side. The supporting end of the rotor is installed in the bearing assembly 2. The connection to the drive shaft 3 is made by a coupling 4. The working end of the rotor is located in the mixing chamber 5. Three rows of cylindrical fingers 6 are fixed on the working surface of the mixing chamber, between which the rotor blades pass during operation. The supply of components to the mixer is carried out through the loading pipe 7. Remote extraction of the rotor from the mixing chamber is carried out by the hydraulic cylinder 8.

The device for remote finger extraction (Fig. 2) consists of three identical nodes located on the body of the mixing chamber. Each node consists of a hydraulic cylinder 9, on the body of which a strap 10 is fixed. The rod of the hydraulic cylinder is stationary and fixed with a pin 11 on the mixing chamber. The bar, in addition to axial movement together with the cylinder body, has the ability to rotate around the axis of the rod.

The bar has four grooves into which T-shaped protrusions of the fingers are inserted. Each groove includes one finger. The grooves are made in such a way that when the bar is turned clockwise (see BB), the bar is disconnected from the T-shaped protrusions of the fingers, while the fingers remain in the mixing chamber. When you turn the bar counterclockwise, it engages with your fingers. The sealing of each finger with the mixing chamber is carried out by paired rings 12 and gasket 13.

The operation of the remote finger extraction device is as follows.

In the initial position, the rotor is in the mixing chamber, and the fingers are not installed. The trims of all nodes are in the lower position and are located along the axis of the rotor.

The installation of the fingers in the holes of the mixing chamber with their subsequent pressing the bar is carried out alternately for each of the three nodes in the following sequence:

a) turn the bar clockwise (see BB) 90 ° perpendicular to the axis of the rotor;

b) manually install your fingers into the holes in the mixing chamber;

c) by supplying oil to the upper (rod) cavity of the hydraulic cylinder, move the bar to the upper position so that T-shaped protrusions of the fingers can be introduced into the grooves of the bar;

d) to engage the fingers with the strap, it is rotated 90 ° counterclockwise;

e) the oil is pressed into the upper (stock) cavity of the hydraulic cylinder;

At the end of the mixer, remote finger extraction is performed, which is carried out in the following sequence:

a) by simultaneously supplying oil to the lower (rodless) cavity of all three hydraulic cylinders of the assemblies, remotely remove the fingers from the mixing chamber. This will cure the fingers from the inner cavity of the mixing chamber;

b) to remotely remove the mixer rotor from the mixing chamber along its axis.

c) turn the bar of one of the nodes clockwise by 90 ° and manually completely remove the fingers from the mixing chamber;

d) turn the bar back 90 °;

e) repeat the wig points for the remaining two nodes

Thus, the use in the proposed design of the mixer of a device that remotely removes fingers from the internal cavity of the mixing chamber, allows the extension of the rotor from the mixing chamber along the axis of the apparatus.

Tests of the proposed utility model in the pilot industrial conditions of NIIPM JSC confirmed its performance.

Claims (1)

A mixer for mixing components of explosive compositions, consisting of a mixing chamber, on the inner surface of which are fixed fingers, a rotor with blades in the form of triangular prisms, a bearing assembly, a frame, a rotor drive, characterized in that the fingers are mounted with the possibility of remote extraction from the mixing chamber using devices for remote finger extraction with drive mechanisms in the form of hydraulic cylinders, while the rotor is extended from the mixing chamber along the axis of the apparatus.

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