RU25136U1 - DEVICE FOR INDUCTION HEATING OF LIQUID MEDIA - Google Patents

Description

Device for induction heating of liquid media.

The utility model relates to electric heating equipment, namely to induction heaters of current and thickened media and is intended for use in various fields of technology as an immersion heater for pumping fuel oil or other thickened masses.

Known induction heater current media described in Auth. testimonial. USSR JVb 366583, 5/08, publ. 1971, containing a multi-turn inductor, covering a heating chamber made in the form of a bundle of heat-accumulating cylinders of conductive material and having an input and output nozzles.

However, the known device does not allow uniform heating of the liquid medium in the central regions of the cross section of the beam of heat storage cylinders, does not provide adjustment of the heating power and prevents the system from overheating, which makes it impossible to use it for pumping flammable liquids with different viscosities and in different seasons.

Known induction heater of liquid fluids of the USSR No. 748917, IPC Н05В 6/10, publ. B.I. No. 26, 1980), containing a multi-turn inductor, covering a heating chamber made in the form of a bundle of heat storage cylinders of conductive material and a set of heat storage elements in the form of disks mounted in series along the length of the cylinders, and an outlet and inlet pipe.

However, the presence of heat-accumulating cylinders reduces the fluidity of viscous liquids in them, makes higher demands on the purity of the liquid, and cannot be used for pumping thickened

20 about g; I O 5 4 7 1

MPKN05V6 / 10

liquids especially with inclusions of polluting fractions, for example, sand.

The closest in technical essence to the proposed utility model is a heater (see Aut. Certificate. 1760653, IPC Н05В 6/10, publ. In B.I. No. 33, 1992), containing an induction winding enclosed in a ferromagnetic sealed enclosure consisting of internal and external tubular elements connected at the ends by flanges, the inner tubular element is made in the form of a set of individual pipes installed along the generatrix of the cylinder close to each other, with each pair of pipes hermetically connected by a plate located along the entire length of the pipes tangent to their outer surface.

However, such heating has uneven electric heating, low productivity for pumping out thickened masses and does not ensure fire safety of its application.

The technical task of the utility model is to increase the efficiency of heating and fire safety and expand the functionality.

This is achieved by the fact that in the known device for heating liquid media containing a heater made in the form of an external tubular element with a multi-turn inductor located inside it, an internal tubular element closed at the ends by flanges and made in the form of a set of separate pipes installed along the generatrix of the cylinder, and the output the nozzle, the heater is equipped with at least one ferromagnetic rod mounted in parallel with the pipes of the inner element, a reflective screen located between the inductor Hur and the inner tubular member, with the capillary temperature sensor, wherein the sensor is mounted on the inner tubular member, the ferromagnetic washers.

Zo.

A MULTI-WAY inductor is made in the form of sections, between which there are ferromagnetic washers, and the device is equipped with a current direction switch in sections of a multi-turn inductor connected to the ends of the section windings, a magnetic starter, a relay that is connected through a capillary to a temperature sensor and is electrically connected to a magnetic starter and an electric starter network.

The essence of the utility model is illustrated by drawings, where in FIG. 1 shows a cross section of a heater; FIG. 2 shows a longitudinal section of a heater; FIG. 3 shows an embodiment of a heater with three induction coils; FIG. 4 shows a circuit diagram of a device.

A device for induction heating of liquid media contains an external tubular element 1 made of a material with magnetostrictive properties, inside of which is a dielectric dielectric layer 2 and a multi-turn inductor 3 located on top of a cylindrical reflective screen 4. The inner tubular element 5 of the inductor 3 is made in the form of separate pipes 6 and at least one ferromagnetic rod 7, which are separated by heat storage material; 8. The blown tubular element is closed by flanges 9 made of m gnitnogo material. The outlet pipe 10 of the heater is connected to the pump.

A multi-turn heater is made in the form of identical sections 11, the sections are separated from each other by ferromagnetic and dielectric washers 12.

In the space between the pipes 6 there is a temperature sensor 13, made in the form of a sealed container with a liquid, which is connected through a thin capillary 14 to a relay-regulator 15 installed far from the heater and connected through a magnetic starter 16 to the network.

Each section of inductor 3 can be made in the form of a single-layer or multi-layer coils, while the beginnings and ends of sections 17 and 18 are connected to the network via switch 19, which changes the order of their connections.

The heater operates as follows.

The device is lowered into a liquid or thickened medium that must be heated. When electric current is passed through the turns of the inductor 3, magnetic losses (due to eddy currents and magnetization reversal) and mechanical vibrations due to magnetostriction occur in the material of the outer tubular element 1, the inner tubular element 5, the tubes 6 and the rods 7. Magnetic losses cause heating of pipes 6, rods 7, external tubular element 1 and flanges 9, and from them - heating of the medium in and around the heater. Mechanical magnetostrictive vibrations of pipes 6, rods 7, external tubular element 1 and flanges 9 cause medium vibrations in and around the heater, which heats and liquefies the material clots and increases its fluidity. With increasing fluidity of the medium, it is sucked into the pipe 6 and is fed through the outlet pipe 10 to the pump. When the number of rods 7 in the inductor zone changes, the amount of ferromagnetic material in the magnetic core changes and the installed heating power changes.

The table shows the changes in power depending on the number of rods 7 in the inductor 3.

Table

The table shows that the adjustment of the installed capacity can be up to 50-60% of the initial installed heating power, depending on the number of installed rods 7 in the heater.

The heat-reflecting screen 4 reduces the heat flux from the inner tubular element 5 and the adjusting rods 7 to the outside and returns heat back to the element 5 due to the reflective action of the screen 4.

The implementation of the heater in the form of sections 11 separated by magnetic washers 12 leads to the formation of closed magnetic fluxes.

When the heater is powered from a single-phase network, the switch 19 changes the order of connection of the beginnings and ends of the sections 11. So, if sections 11 of the coils of the inductor 3 are turned on, the magnetic resistance of the circuit of the inductor 3 is maximum, and the heating power will be minimal. This power is evenly distributed over all areas of the inner tubular element 5. If the winding of the section 11 of the inductor 3, for example, located near the outlet pipe 10, turns on counter to the other windings of the sections 11, then its magnetic flux is subtracted from the total magnetic flux of the remaining windings of the following sections 11 of the inductor 3, the resistance to magnetic losses decreases, the installed power increases and concentrates in the areas of the inner tubular element 5 with the coordinated inclusion of the windings of the sections 11 of the inductor 3.

Setting up the device using the rods 7 is as follows. Work begins with a maximum number of rods of 7 and a minimum power. Note, depending on the flow of the pumped liquid and its temperature, the installation power is adjusted by changing the number of rods 7. If pumping is weak, the number of rods 7 is reduced to obtain

optimal heating mode of the pumped liquid. When the rod 7 is placed inside the pipe 6, the liquid is internally heated and the pipeline is cleaned.

In the process of regulating the mode, the signal from the temperature sensor 13 through the capillary 14 is supplied to the relay controller 15, which, with the help of a magnetic starter 16, periodically turns the heater on and off and maintains a stable temperature for heating the liquid in the pipes 6.

Using the proposed device provides an increase in the efficiency of heating, fire safety, and also allows you to adjust and stabilize the temperature of liquid media. In addition, the device allows you to heat and dilute thickened liquid media, which expands its functionality.

Claims (1)

A device for heating liquid media containing a heater made in the form of an external tubular element with a multi-turn inductor located inside it, an internal tubular element closed at the ends by flanges and made in the form of a set of separate pipes installed along the generatrix of the cylinder, and an outlet pipe, characterized in that the heater is equipped with at least one ferromagnetic rod mounted in parallel with the pipes of the inner element, a reflective screen located between the inductor and the inner a single tubular element, a temperature sensor with a capillary, while the temperature sensor is mounted on the inner tubular element, ferromagnetic washers, the multi-coil inductor is made in sections, between which there are ferromagnetic washers, and the device is equipped with a current direction switch in sections of the multi-coil inductor connected to the ends of the sections windings, a magnetic starter, a relay-regulator connected through a capillary to a temperature sensor and electrically connected to a magnetic starter and an electrical network.