RU235450U1 - Device for mixing a component with an introduced filler in a mixing chamber - 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 component with an introduced filler in a mixing chamber, comprising a housing and a rod with a return channel, a mixing chamber, throttle devices, the rod is made with the possibility of moving by means of a hydraulic cylinder, the throttle devices of the mixing chamber are located opposite each other and are made with the possibility of connecting to a pump with a feed pressure greater than the pressure in the mixing chamber, the mixing chamber is made with the possibility of creating a turbulent zone in it. The technical result of the utility model consists in increasing the reliability of the device. 3 clauses, 6 figs.

Description

The utility model relates to installations for mixing, in particular to installations for mixing components in a mixing chamber [B29B7/00, B01F27/00, B01F27/05].

The prior art discloses a DOSING AND MIXING APPARATUS [RU2350462C1, 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, 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 round section spirals and the auger are made in the form of an elastic screw spiral, which are subject to mechanical wear, especially when working with abrasive powders, and in the upper parts of the additional shafts, where the spirals are installed, local accumulation of material may occur, which will lead to uneven dosing, while the device includes several complex components, such as a mixer with a washing system and a dosing system with a belt conveyor, thereby cleaning all elements, especially hard-to-reach internal parts of the device, may require significant effort, and as a result, will reduce the reliability of the device.

Also known from the prior art is a MIXER FOR BULK MATERIALS [RU229057U1, 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 disk prevents bulk material from entering the bearing assembly, and if it is not sealed or has gaps, small particles of dust and powder can gradually penetrate into the bearing area, which will lead to contamination, increased wear and tear and failure, and as a result, reduce the reliability of the device.

The closest in technical essence is the INSTALLATION FOR MIXING MULTI-COMPONENT MIXTURES [RU207233U1, 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 cantilevered support structure equipped with a linear drive designed to impart reciprocating movements to the mixing element in a vertical plane.

The main technical problem of the prototype is that the design with a main pipe and radial pipes with holes makes it difficult to flush and remove the mixture residues after the process is completed, thus, frequent flushing will be required, which can reduce productivity due to the long preparation time for the next cycle, and as a result, reduce the reliability of the device.

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

The technical result of the utility model is to increase the reliability of the device.

The technical result is achieved due to the fact that the device for mixing the component with the introduced filler in the mixing chamber includes a housing and a rod with a return channel, a mixing chamber, throttle devices, the rod is made with the possibility of movement by means of a hydraulic cylinder, the throttle devices of the mixing chamber are located opposite each other and are made with the possibility of connection to a pump with a feed pressure greater than the pressure in the mixing chamber, the mixing chamber is made with the possibility of creating a turbulent zone in it.

In particular, the mixing chamber is designed with the ability to operate in dosing mode and in circulation mode.

In particular, the mixing chamber is designed to allow simultaneous mixing of three components.

Brief description of the drawings.

Fig. 1 shows the installation diagram.

Fig. 2 shows the installation in circulation mode with a horizontal section, top view.

Fig. 3 shows the installation in circulation mode with a vertical section, side view.

Fig. 4 shows the installation in dosing mode with a horizontal section, top view.

Fig. 5 shows the installation in dosing mode with a vertical section, side view.

Fig. 6 shows the installation with a vertical section, front view,

where 1 is the body, 2 is the rod, 3 is the return channel, 4 is the mixing chamber, 5 is the throttle devices, 6 is the hydraulic cylinder, 7 are the holes, 8 are the mounting holes, 9 are the pipes, 10 is the container, 11 are the tanks, 12 are the high-pressure pumps, 13 is the pump, 14 is the filler hole.

Implementation of a utility model

The device for mixing the component with the introduced filler in the mixing chamber includes a body 1 and a rod 2 with a return channel 3, a mixing chamber 4, and throttle devices 5 (Fig. 1-5).

The rod 2 is designed to be moved by means of a hydraulic cylinder 6.

The mixing chamber 4 is designed with the possibility of creating a turbulent zone in it, due to the multi-flow supply of components.

Multi-stream feeding of components means a method of introducing the first component, the second component and the third component into the mixing chamber 4 through independent streams that differ in speed, direction and pressure.

The first component and the second component are fed through throttle devices 5 distributed in the mixing chamber 4. The throttle devices 5 are located opposite each other, which ensures a counter collision of flows inside the mixing chamber 4. The first component and the second component are fed under pressure and speed greater than the pressure and speed of the third component with the filler, which additionally enhances mixing.

The first component and the second component under high pressure enter through throttle devices 5 and are divided into several thin streams. The streams intersect at different points of the mixing chamber 4, creating intense shear and swirl zones. The counter flows cause turbulence, due to which the components are quickly and uniformly mixed.

The mixing chamber 4 is designed with the possibility of operating in the dosing mode and in the circulation mode. The mixing chamber 4 is designed with the possibility of simultaneous mixing of three components.

In the housing 1, openings 7 with internal threads are made, into which throttle devices 5 are mounted by means of fittings. In the housing 1, mounting openings 8 are made, designed with the possibility of connection with pipes 9 by means of a threaded connection, which are connected to the container 10 and tanks 11 (Fig. 1).

In the container 10 and tanks 11 there are openings in which the fittings are hermetically installed; at the ends of the communicating pipes 9 there are nipples and a free nut for fastening with the fitting.

The high-pressure metering pump 12 is connected on both sides to the communicating pipes 9 by a nipple-nipple connection.

Pump 13 is connected on both sides to communicating pipes 9 by a nipple-and-nipple connection.

The throttle devices 5 of the mixing chamber 4 are designed with the possibility of connecting to a pump with a higher feed pressure than the feed pressure into the mixing chamber 4, due to the presence of needle valves with adjustable outlet openings in them (Fig. 6). In this case, each needle valve has a conical shut-off element (needle), which moves along its axis inside the throttle device 5. The inlet opening of the needle valve is connected to the seat opening 8, which is designed with the possibility of connecting to the high-pressure pump 12, and the outlet opening of the needle valve of the throttle device 5 is connected to the mixing chamber.

When the first component and the second component are fed under high pressure from the high-pressure pumps 12 to the throttle device 5 through the mounting holes 8, its flow is limited by the cross-section of the outlet hole of the needle valve.

By adjusting the position of the needle, it is possible to change the area of the outlet opening, which affects the pressure and flow rate before entering the mixing chamber 4.

In the fully open position of the needle valve, pressure losses are minimal, and in the partially closed position, throttling is created, which leads to a decrease in the flow pressure in front of the mixing chamber 4.

In the housing 1, a mixing chamber 4 is made, in which a rod 2 is mounted, which can perform reciprocating movements using a hydraulic cylinder 6.

The rod 2 is connected by a permanent connection to the hydraulic cylinder 6, for example, by soldering or welding. In the rod 2, a return channel 3 is made, designed with the possibility of flowing of the first component, the second component and the third component.

The first component, the second component and the third component may be liquid components, such as polyurethane components or polyols, such as isocyanate components, such as 4,4'-diphenylmethane diisocyanate, MDI, as well as polyester and epoxy resins and curing agents, such as epoxy resins with amine curing agents, which are used in the production of composite materials and adhesives.

Fillers can be solid substances, such as fillers for plastics, such as glass fibers, carbon fibers, as well as solid particles, such as microspheres, pigments, talc, calcite, titanium dioxide.

Low pressure means pressure from 0.01 to 5 MPa, and high pressure means pressure over 5 MPa. In this case, the speed at low pressure is from 0.1 to 10 m/s, and at high pressure from 50 to 200 m/s.

The device for mixing the component with the introduced filler in the mixing chamber is made in a single housing 1, which means the shell inside which the component parts of the device are mounted. All components of housing 1 are assembled at the manufacturing plant, mounted inside housing 1 and subsequently delivered to the consumer.

The rod 2 is designed with the possibility of movement by means of a hydraulic cylinder 6, thereby the reciprocating movement of the rod 2 facilitates self-cleaning of the mixing chamber 4, reducing the likelihood of clogging, and as a result, increases the reliability of the device.

The throttle devices 5 of the mixing chamber 4 are designed with the possibility of connection to a pump with a feed pressure greater than the pressure in the mixing chamber 4, thereby creating intense turbulent flows, ensuring a faster and more uniform distribution of the filler in the component, eliminating the formation of dead zones and clots in the mixing chamber 4, and also allows flushing the throttle devices 5, reducing the risk of their clogging, while the increased pressure drop improves self-cleaning of the system, reducing the likelihood of deposits of solid particles on the inner walls of the mixing chamber 4, and as a result, increases the reliability of the device.

The mixing chamber 4 is designed with the possibility of creating a turbulent zone in it, due to the multi-flow supply of components, thereby ensuring a uniform distribution of components, eliminating stratification of the mixture, the intensity of mixing increases, and the turbulent zones prevent the settling of solid particles on the walls of the mixing chamber 4, eliminating the formation of stagnant zones where the mixture can stick and impair the operation of the device, and as a result, increases the reliability of the device.

The device for mixing the component with the introduced filler in the mixing chamber is used as follows.

During operation, the first component and the second component, which do not contain fillers, are fed from tanks 11 through high-pressure pumps 12 into housing 1 and through throttle devices 5 into mixing chamber 4.

The third component is mixed with the filler to a homogeneous pulp in container 10 and is fed by pump 13 through filling opening 14 into mixing chamber 4 with low pressure, sufficient only to ensure movement.

In the high-pressure mixing device, the components are mixed in a highly turbulent zone of the mixing chamber 4, formed by the collision of two flows of the first component and the second component, supplied under high pressure. The high speed of the flows of the first component and the second component is ensured by passing through throttle devices 5, which are adjustable needle valves with an opening at the outlet. The rod 2 in the body 1 is moved by means of a hydraulic cylinder 6.

Due to the throttle devices 5, when the first component and the second component pass through them, a sharp increase in their flow rate occurs. In addition, the flow is sprayed into small particles, which also promotes mixing of the first component and the second component. When two flows collide, the first component and the second component moving at high speed, a high-turbulent zone is formed, in which mixing occurs. The third flow of the third component, containing the filler, is fed into the mixing chamber 4 at a low speed and is mixed due to the energy of the first two flows of the first component and the second component.

The device for mixing the component with the introduced filler in the mixing chamber has two operating modes: circulation mode and dosing mode.

In the circulation mode, the distribution rod 2 is in the closed position (extreme forward position). In this mode, the first component and the second component separately pass through the throttle devices 5, entering the return channel 3 of the rod 2, through which they enter the return line and return to the tanks 11.

In the circulation mode, the third component with the filler enters the mixing chamber 4 and, also passing through the return channel 3 of the rod 2, enters back into the container 10. In the circulation mode, a constant flow of components through the mixing chamber 4 is ensured in the interval between pourings.

The first component and the second component are fed through separate lines via throttle devices 5, after which they enter the return channel 3 of rod 2, through return channel 3 the first component and the second component enter the return line and return to tanks 11 via the return line. Thus, the first component and the second components circulate, but do not mix in this mode.

The third component with the filler enters the mixing chamber 4, however, since the rod 2 is closed, it cannot remain in the mixing chamber 4 and after passing through the mixing chamber 4, it also enters the return channel 3, then goes back to the tank 10 along the return line.

In the dosing mode, when the rod 2 moves backward, the mixing chamber 4 opens, the first component and the second component passing through the throttle devices 5 create a highly turbulent zone in the mixing chamber 4, due to which they are mixed. The third flow of the third component with the filler enters the mixing chamber 4 through the filling hole 14. When the rod 2 moves forward, the mixing chamber 4 is closed and cleaned of the mixture residues, and the flow is switched from the mixing mode to the circulation mode.

Examples of the implementation of a device for mixing a component with an introduced filler in a mixing chamber.

The first example of implementation is a mixing device for epoxy compounds, which mixes epoxy resin (the first component) under a pressure of 12 MPa, a hardener (the second component) under a pressure of 12 MPa and epoxy resin with glass fibers (the third component), supplied in a resin flow under a pressure of 1.0 MPa into the mixing chamber 4. The resin and hardener pass through throttle devices 5, then enter the mixing chamber 4, where a turbulent zone is created, ensuring intensive mixing. The return channel 3 of the rod 2 allows the mixture to circulate, controlled by the hydraulic cylinder 6.

The second example of implementation is a mixing device for two-component silicones, which mixes a silicone base (the first component) under a pressure of 15 MPa, a catalyst (the second component) under a pressure of 20 MPa and a mixture of a filler (aerosil) with a silicone base (the third component), supplied in the form of a pulp under a pressure of 0.5 MPa, supplied to the mixing chamber 4. The first component and the second component pass through throttle devices 5, then enter the mixing chamber 4, where a turbulent flow is formed for uniform distribution of the catalyst. Circulation through the return channel 3 of the rod 2 prevents the filler from settling.

The third example of implementation is a mixing device for producing polyurethane foam, which mixes polyol (the first component) under a pressure of 15 MPa, polyisocyanate (the second component) under a pressure of 15 MPa and a mixture of polyol with titanium dioxide (the third component), fed in the form of a pulp under a pressure of 0.3 MPa into the mixing chamber 4. Throttle devices 5 regulate the feed of the first component and the second component, which enter the mixing chamber 4, where a turbulent zone is created for effective foaming. Circulation through the return channel 3 of the rod 2 maintains the stability of the mixture before feeding it into the molding zone.

The fourth example of implementation is a mixing device for bitumen emulsions, which mixes bitumen (the first component) under a pressure of 18 MPa, an emulsifier (the second component) under a pressure of 15 MPa and water (the third component) under a pressure of 1 MPa. The first component and the second component pass through throttle devices 5, after which they enter the mixing chamber 4, where a turbulent zone is created for effective dispersion of bitumen in the aqueous phase. The return channel 3 of the rod 2 ensures circulation of the mixture to maintain a uniform composition.

The fifth example of implementation is a mixing device for waterproofing compositions, which mixes a liquid polymer (the first component) under a pressure of 10 MPa, a curing agent (the second component) under a pressure of 10 MPa and a mineral filler (the third component), supplied to the polymer in the form of a suspension under a pressure of 0.5 MPa in the mixing chamber 4. Throttle devices 5 regulate the flows of the first component and the second component, which enter the mixing chamber 4, where a turbulent zone is created for uniform mixing. Circulation through the return channel 3 of the rod 2 allows maintaining the homogeneity of the mixture.

Based on the technical result, a comparative analysis of the claimed invention with analogs and a prototype was conducted. The analysis included checking the operability of the devices for 1000 hours. After 1000 hours of operation, RU 2350462 C1 showed wear of the spirals and shaft bearings, as well as contamination of the mixer. After 1000 hours, RU229057U1 showed clogging of filters, wear of bearings, deterioration of the auger due to material sticking. After 1000 hours of operation, RU 207233 U1 showed clogging of radial pipes, leaks in connections, and loosening of fasteners due to vibration. And after 1000 hours of operation, the utility model device continued to operate without damage or clogging.

Additionally, the claimed utility model allows avoiding clogging of throttle devices 5 with filler particles, since the pressure created by high-pressure pumps 12 is higher than the pressure in the mixing chamber. This allows increasing the functionality of the device, since the mixing chamber 4 does not require flushing after mixing is complete.

Thus, the utility model increases reliability in comparison with analogues and the prototype.

Claims (3)

1. A device for mixing a component with an introduced filler in a mixing chamber, including a housing and a rod with a return channel, a mixing chamber, throttle devices, characterized in that the rod is made with the possibility of movement by means of a hydraulic cylinder, the throttle devices of the mixing chamber are located opposite each other and are made with the possibility of connection to a pump with a feed pressure greater than the pressure in the mixing chamber, the mixing chamber is made with the possibility of creating a turbulent zone in it. 2. The device according to item 1, characterized in that the mixing chamber is designed with the possibility of operating in dosing mode and in circulation mode. 3. The device according to item 1, characterized in that the mixing chamber is designed with the possibility of simultaneous mixing of three components.