RU236524U1 - DEVICE FOR MIXING A PRE-PREPARED MIXTURE OF A COMPONENT WITH A FILLER UNDER LOW PRESSURE IN A DYNAMIC MIXER - Google Patents

Abstract

The utility model relates to mixing installations, in particular to installations for mixing components in a mixing chamber. A device for mixing a pre-prepared mixture of a component with a filler under low pressure in a dynamic mixer, comprising a housing with a rotor located inside, a mixing chamber, a valve device, a spray device, a spool valve, a pneumatic cylinder, a needle, a spring and a pressing device, the spool valve is made with the possibility of moving by the pneumatic cylinder, the needle is made with the possibility of opening and closing the outlet opening of the spray device, the spring is made with the possibility of regulating the pressure of feeding the component into the mixing chamber. The technical result of the utility model consists in increasing the intensity of mixing. 5 clauses, 3 figs.

Description

The utility model relates to mixing installations, in particular to installations for mixing components in a mixing chamber [B29B 7/00, B01F 27/00, B01F 27/05].

The prior art discloses a DOSING AND MIXING APPARATUS [RU 2350462 C1, publ. [27.03.2009], comprising a housing with conical walls, a discharge pipe and a heater, a central drive shaft coaxially located inside the housing and a carrier mounted with the possibility of relative rotation around the central shaft, additional shafts located on the carrier, the axes of which are located parallel to the walls of the housing, the additional shafts are located with the possibility of rotation and are connected by drives connected to the central shaft, the central and additional shafts are provided with spirals of circular cross-section secured to the carrier, the central shaft is covered by a spiral along its entire length, and the additional shafts are made of upper and lower smooth parts with smaller and larger diameters and are covered by spirals in the upper parts, wherein the apparatus comprises a device for metered feeding of powder and liquid components for preparing a compound and dispensers for feeding the compound and hardener into a mixer having a flushing system and including a housing with branch pipes for feeding the compound and hardener and a rotor located inside the housing, covered by a screw made in the form of elastic screw spiral, rotor drive and discharge branch pipe, while the device for metered supply of powder and liquid components is made in the form of a belt conveyor with loading bins of components equipped with electronic scales.

The disadvantage of this dosing and mixing device is that the presence of many elements (central shaft, additional shafts, spirals, carrier, drives, etc.) makes the design of the device complex and cumbersome, which can lead to an increase in the time of assembly, adjustment and maintenance, as well as to an increase in the likelihood of breakdowns, and as a result, will reduce the intensity of mixing.

Also known from the prior art is a MIXER FOR BULK MATERIALS [RU 229057 U1, published 19.09.2024], comprising a housing in the form of a hopper with a truncated bottom, on which filters are installed on top, a product mixing chamber, a casing installed along the axis of the housing, inside which a mixing screw with a bearing support is placed, a loading neck and an unloading branch pipe, located respectively in the upper and lower parts of the housing, an additive input screw installed in the lower part of the housing, characterized in that the lower bearing support of the mixing screw is separated from the product mixing chamber by a metal disk.

The disadvantage of this bulk material mixer is that the metal disc separating the lower bearing support from the mixing chamber can create "dead zones" in the mixing area, which reduces the overall mixing intensity, since the material in these zones may remain unmixed, and as a result, the mixing intensity will decrease.

The closest in technical essence is the INSTALLATION FOR MIXING MULTI-COMPONENT MIXTURES [RU 207233 U1, published 18.10.2021], which includes a mixing element and a fixing device designed to rotate and fix the barrel, characterized in that the mixing element is made in the form of a vertical main pipe, to which at least two pipes with through holes in the walls are radially connected perpendicular to its axis, and the main pipe communicates with each of the radial pipes, is connected to a pipeline for feeding the components of the mixture and to a cantilever-mounted support structure equipped with a linear drive designed to impart reciprocating movements to the mixing element in a vertical plane.

The main technical problem with the prototype is that the design with multiple pipes and through holes makes it difficult to clean the unit after use, especially when working with viscous or solidifying materials, thus this can lead to a decrease in efficiency during reuse, and as a result, reduce the intensity of mixing.

The purpose of a utility model is to eliminate the shortcomings of the prototype.

The technical result of the utility model consists in increasing the intensity of mixing.

The intensity of mixing is understood as a characteristic of the mixing process that reflects the speed and degree of achieving homogeneity of the mixture, which is determined by the speed of achieving homogeneity, the degree of homogeneity and the energy expended on mixing.

The technical result is achieved due to the fact that the device for mixing a pre-prepared mixture of a component with a filler under low pressure in a dynamic mixer includes a housing with a rotor located inside, a mixing chamber, a valve device, a spray device, a spool valve, a pneumatic cylinder, a needle, a spring and a pressure device, the spool valve is designed with the possibility of movement by the pneumatic cylinder, the needle is designed with the possibility of opening and closing the outlet opening of the spray device, the spring is designed with the possibility of regulating the pressure of feeding the component into the mixing chamber.

In particular, the valve is designed with the ability to move to fixed positions.

In particular, the spray device comprises a housing, and the needle is configured to move along the housing of the spray device.

In particular, the needle is fixed in the body of the spray device under the action of two balanced opposite forces.

In particular, the spring is designed to support the needle in the central position of the spray device body.

In particular, the mixing chamber is designed with the possibility of mixing in the dosing mode and in the circulation mode.

Brief description of the drawings.

Fig. 1 shows the structural diagram of the circulation mode.

Fig. 2 shows the structural diagram of the dosing mode.

Fig. 3 shows the extension element A.

The figures indicate:

1 - body,

2 - rotor,

3 - mixing chamber,

4 - valve device,

5 - spray device,

6 - valve,

7 - pneumatic cylinder,

8 - needle,

9 - spring,

10 - pressing device,

11 - outlet,

12 - spray device body,

13 - electric motor,

14 - entrance to the mixing chamber,

15 - return channel,

16 - mounting holes,

17 - pipes,

18 - first capacity,

19 - second capacity,

20 - pump,

21 - high pressure pump,

22 - valve,

23 - cavity,

24 - drain pipe.

Implementation of a utility model

A device for mixing a pre-prepared mixture of a component with a filler under low pressure in a dynamic mixer includes a housing 1 with a rotor 2 located inside, a mixing chamber 3, a valve device 4, a spray device 5, a spool valve 6, a pneumatic cylinder 7, a needle 8, a spring 9 and a pressing device 10. The mixing chamber 3 is designed with the possibility of mixing in the dosing mode and in the circulation mode.

The needle 8 is designed to open and close the outlet opening 11 of the spray device 5.

The spray device 5 comprises a housing 12, a spring 9 and a pressing device 10. The needle 8 is designed to move along the housing of the spray device 12. The needle 8 is secured in the housing of the spray device 12 under the action of two balanced opposite forces.

Spring 9 is designed to support needle 8 in the central position of the body of spray device 12. Spring 9 is designed to regulate the pressure of feeding the component into mixing chamber 3.

Rotor 2 is designed with the possibility of connection to electric motor 13. Spool 6 and pneumatic cylinder 7 are mounted in valve device 4. Spool 6 is designed with the possibility of movement by pneumatic cylinder 7. Spool 6 is designed with the possibility of movement to fixed extreme positions. When spool 6 is pressed to one extreme position, the input to mixing chamber 14 is closed and return channel 15 is opened, and when spool 6 is pressed to the other extreme position, return channel 15 is closed and the input to mixing chamber 14 is opened. Spool 6 is made of two parts: cylindrical and conical.

In the body 1, mounting holes 16 are made, which are designed with the possibility of connecting communicating pipes 17, connected to the first container 18 and the second container 19.

The device for mixing a pre-prepared mixture of a component with a filler under low pressure in a dynamic mixer is made in a single housing 1, which is understood to be a shell inside which the component parts of the device are mounted. Inside the housing 1, a rotor 2, a valve device 4, a spray device 5, a spool valve 6, a pneumatic cylinder 7, a needle 8, a spring 9 and a pressure device 10 are mounted by a detachable connection, for example, a bolted or screwed connection or a seat or a nipple-nipple connection. All components of the housing 1 are assembled at the manufacturing plant, mounted inside the housing 1 and subsequently supplied to the consumer.

The spool valve 6 is designed with the possibility of movement by the pneumatic cylinder 7, thereby providing control over the supply of mixture components into the mixing chamber 3, and the pneumatic cylinder 7 provides movement of the spool valve 6, thereby allowing the supply of the component into the mixing chamber to be quickly switched on and off, and as a result, increases the intensity of mixing.

The needle 8 is designed with the ability to open and close the outlet opening 11 of the spray device 5, and being in the position of equilibrium of the forces of the flow pressure and the spring force, stabilizes the supply pressure of the second component into the mixing chamber, which ensures spraying of the flow onto finely dispersed particles, and as a result, increases the intensity of mixing.

Spring 9 is designed with the ability to regulate the pressure of the component feed into the mixing chamber 3, which promotes uniform distribution of the mixture components, allows compensating for possible fluctuations due to changes in viscosity, density, ensuring process stability, preventing uneven mixing, and, as a result, increases the intensity of mixing.

A device for mixing a pre-prepared mixture of a component with a filler under low pressure in a dynamic mixer is used as follows.

An electric motor 13 is connected to the housing 1, with the help of which the rotor 2 is rotated. The first container 18 is connected through the pipes 17 to the mounting hole 16 and through the pipes 17 to the pump 20, the outlet of which is connected through the pipes 17 to the return channel 15. The second container 19 is connected through the pipes 17 to the high-pressure pump 21 and the valve 22, and their outlets to the mounting hole 16.

One of the components is mixed with the filler to a homogeneous pulp in the first container 18 and is fed by the pump 20 into the mixing chamber 3 through the valve device 4 with low pressure, sufficient only to ensure movement. The device has two operating modes: the component circulation mode and the dosing mode.

In the circulation mode, the valve 6 closes the entrance to the mixing chamber 14 and does not allow the component to pass into the mixing chamber 3. In this mode, the component supplied by the pump 20 flows into the cavity 23, from which it returns to the first container 18. In the dosing mode, the valve 6 moves back and is pressed tightly against the opposite surface, blocking access to the cavity 23. In this mode, the component enters the mixing chamber 3. The second component without filler, from the second container 19, is fed by the high-pressure pump 21 into the spray device 5. In the circulation mode, the component supplied by the high-pressure pump 21 returns to the second container 19 through the valve 22.

In the dosing mode, the valve 22 is closed, and the component creates high pressure in the body of the spray device 12. When the liquid pressure increases, an axial force is created in the body of the spray device 12 on the needle 8 in the direction opposite to the pressure of the spring 9 and the pressing device 10. When the pressure increases, the force exceeds the force of the spring 9, and the needle 8 moves away from the outlet 11 in the body of the spray device 5, opening the outlet of the liquid into the mixing chamber 3. Passing through the gap between the body of the spray device 12 and the needle 8, the pressure drops sharply, and the liquid is sprayed. When using a device with a complete overlap of the outlet 11, the size of the hole itself within certain limits does not matter, since the pressure difference is created in a narrow gap between the body of the spray device 12 and the needle 8.

In the dosing mode, driven by the electric motor 13, the rotor 2 rotates in the housing 1. The components enter the mixing chamber 3 through the valve device 4 and the spray device 5. As they move along the mixing chamber 3, the components are mixed due to the energy of the rotating rotor 2. The finished mixture exits the mixing chamber 3 through the drain pipe 24.

An example of implementation is a device for mixing a pre-prepared mixture of a component with a filler under low pressure in a dynamic mixer, including a housing 1 with a rotor 2 located inside, a mixing chamber 3, a valve device 4, a spray device 5, a spool 6, a pneumatic cylinder 7, a needle 8, a spring 9 and a pressing device 10, the spool 6 is designed with the possibility of movement by the pneumatic cylinder 7, the needle 8 is designed with the possibility of opening and closing the outlet opening 11 of the spray device 5, the spring 9 is designed with the possibility of stabilizing the pressure of the component supply to the mixing chamber 3.

Based on the technical result, a comparative analysis of the utility model with analogs and a prototype was carried out. The analysis included checking the degree of homogeneity and the amount of energy spent on mixing 100 kg of the mixture. For RU 2350462 C1, the degree of homogeneity was 80%, energy consumption was 5.0 kW⋅h. For RU 229057 U1, the degree of homogeneity was 85%, energy consumption was 4.5 kW⋅h. For RU 207233 U1, the degree of homogeneity was 90%, energy consumption was 4.0 kW⋅h. And for the declared utility model, the degree of homogeneity was 95%, energy consumption was 3.0 kW⋅h.

Thus, the utility model increases the mixing intensity in comparison with analogues and the prototype by 10-15%.

Claims (6)

1. A device for mixing a pre-prepared mixture of a component with a filler under low pressure in a dynamic mixer, comprising a housing with a rotor located inside, a mixing chamber, a valve device, a spray device, a spool valve, a pneumatic cylinder, a needle, a spring and a pressure device, characterized in that the spool valve is designed with the possibility of movement by the pneumatic cylinder, the needle is designed with the possibility of opening and closing the outlet opening of the spray device, the spring is designed with the possibility of regulating the pressure of the component feed into the mixing chamber. 2. The device according to item 1, characterized in that the spool valve is designed with the ability to move to fixed positions. 3. The device according to item 1, characterized in that the spray device comprises a housing, and the needle is designed with the ability to move along the housing of the spray device. 4. The device according to item 3, characterized in that the needle is secured in the body of the spray device under the action of two balanced opposite forces. 5. The device according to item 3, characterized in that the spring is designed with the ability to support the needle in the central position of the body of the spray device. 6. The device according to item 1, characterized in that the mixing chamber is designed with the possibility of mixing in the dosing mode and in the circulation mode.