CN112113421A

CN112113421A - Self-stirring induction heating furnace

Info

Publication number: CN112113421A
Application number: CN202010927922.2A
Authority: CN
Inventors: 汪绍松
Original assignee: Ningguo Hongda Electric Furnace Co ltd
Current assignee: Ningguo Hongda Electric Furnace Co ltd
Priority date: 2020-09-07
Filing date: 2020-09-07
Publication date: 2020-12-22

Abstract

The invention provides a self-stirring induction heating furnace which comprises a furnace pipe and a furnace frame, wherein the furnace pipe is placed on the furnace frame, an induction coil is arranged around the periphery of the furnace pipe and fixed on the furnace frame, a stirring device is arranged in an inner cavity of the furnace pipe, and a discharge hole capable of being opened and closed is arranged at the bottom of the furnace pipe. According to the self-stirring induction heating furnace provided by the technical scheme, materials are stirred, so that the temperature in the furnace pipe is uniformly distributed, the heating process is accelerated, and the production operation efficiency is improved. When the materials begin to melt, the surface layer of the materials melts before the interior of the materials due to the skin effect, under the action of the stirring device, the materials are subjected to friction vibration to enable the melted parts to converge and flow to the bottom of the inner cavity of the furnace, and then the materials on the liquid surface melt the surface layer and flow to the bottom of the inner cavity of the furnace under the action of the skin effect, so that the heating process is accelerated.

Description

Self-stirring induction heating furnace

Technical Field

The invention relates to the technical field of induction heating furnaces, in particular to a self-stirring type induction heating furnace.

Background

An induction heating furnace is a power supply device which converts power frequency 50HZ alternating current into intermediate frequency (more than 300HZ to 1000HZ), converts three-phase power frequency alternating current into direct current after rectification, converts the direct current into adjustable intermediate frequency current, supplies the intermediate frequency alternating current flowing through a capacitor and an induction coil, generates high-density magnetic lines in the induction coil, cuts metal materials contained in the induction coil, and generates large eddy current in the metal materials. The workpiece is placed in an inductor (coil), and when alternating current with certain frequency is introduced into the inductor, an alternating magnetic field is generated around the inductor. The electromagnetic induction action of the alternating magnetic field causes a closed induced current-eddy current to be generated in the workpiece. The induced current is distributed unevenly on the cross section of the workpiece, the current density on the surface layer of the workpiece is high, and the current density gradually decreases inwards, and the phenomenon is called skin effect. The electric energy of the high-density current on the surface layer of the workpiece is converted into heat energy, so that the temperature of the surface layer is increased, and the surface heating is realized.

Most of the existing induction heating furnaces for casting do not have a stirring function, so that the heating process is slow, and the improvement of the production operation efficiency is not facilitated.

Disclosure of Invention

The invention provides a self-stirring induction heating furnace aiming at the defects of the prior art.

The invention solves the technical problems through the following technical means:

from stirring formula induction heating furnace, including stove courage and furnace frame, the stove courage is placed on the furnace frame, and the periphery of stove courage has surrounded induction coil, induction coil fixes on the furnace frame, the inner chamber of stove courage sets up stirring device, and the bottom of stove courage installs the discharge gate that can open and close.

As above-mentioned technical scheme's improvement, stir the device and include the standpipe, the vertical setting of standpipe is at the stove courage inner chamber, and standpipe and the coaxial setting of stove courage, the both ends of standpipe are all sealed, and the bottom circumference of standpipe is provided with a plurality of first stirring rakes, first stirring rake uses the standpipe to be central symmetry setting as the center, and the outer wall of the one end fixed connection standpipe of first stirring rake, first stirring rake is platelike, set up a plurality of and standpipe complex first liquid holes on the bottom lateral wall of standpipe, first liquid hole position corresponds with first stirring rake connection standpipe lateral wall department, set up a plurality of and first liquid hole complex second liquid holes on the top lateral wall of standpipe, the top coaxial coupling of standpipe has the transfer line, the external power source drive of transfer line.

As an improvement of the technical scheme, a plurality of second stirring paddles are arranged on the circumferential direction of the pipe wall of the vertical pipe between the first liquid hole and the second liquid hole, and one end of each second stirring paddle is fixedly connected with the pipe wall of the vertical pipe.

As the improvement of the technical scheme, the first stirring paddle is arc-shaped, and the free end of the first stirring paddle extends to one side of the vertical pipe in the rotating direction.

As an improvement of the technical scheme, the discharge hole comprises a discharge pipe, one end of the discharge pipe is communicated with the furnace pipe, and a valve is arranged on the discharge pipe.

The invention has the beneficial effects that: according to the self-stirring induction heating furnace provided by the technical scheme, materials are stirred, so that the temperature in the furnace pipe is uniformly distributed, the heating process is accelerated, and the production operation efficiency is improved.

When the materials begin to melt, the surface layer of the materials melts before the interior of the materials due to the skin effect, under the action of the stirring device, the materials are subjected to friction vibration to enable the melted parts to converge and flow to the bottom of the inner cavity of the furnace, and then the materials on the liquid surface melt the surface layer and flow to the bottom of the inner cavity of the furnace under the action of the skin effect, so that the heating process is accelerated.

At material melting back stage, under the cooperation of first stirring rake of pivoted and standpipe, the molten material gets into the standpipe through first liquid hole, flows through the second liquid hole again, reaches the balanced effect of upper and lower interlaminar temperature, helps reducing the inhomogeneous and time of excessive heating of temperature to the heating procedure has been shortened.

Drawings

FIG. 1 is a schematic structural view of example 1 of the present invention;

FIG. 2 is a schematic view of a first paddle according to the present invention;

fig. 3 is a schematic structural diagram of embodiment 2 of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Example 1

As shown in fig. 1-2, the self-stirring induction heating furnace of this embodiment includes a furnace pipe 1 and a furnace frame 2, the furnace pipe 1 is placed on the furnace frame 2, an induction coil 3 is surrounded on the periphery of the furnace pipe 1, the induction coil 3 is fixed on the furnace frame 2, a stirring device 4 is disposed in an inner cavity of the furnace pipe 1, and a discharge port 5 capable of being opened and closed is installed at the bottom of the furnace pipe 1. The discharge port 5 comprises a discharge pipe 51, one end of the discharge pipe 51 is communicated with the furnace pipe 1, and a valve 52 is arranged on the discharge pipe 51.

According to the self-stirring induction heating furnace provided by the technical scheme, materials are stirred, so that the temperature in the furnace pipe 1 is uniformly distributed, the heating process is accelerated, and the production operation efficiency is improved.

Stir device 4 and include standpipe 41, the vertical setting of standpipe 41 is at 1 inner chamber of stove courage, and standpipe 41 and the 1 coaxial setting of stove courage, the both ends of standpipe 41 are all sealed, and the bottom circumference of standpipe 41 is provided with a plurality of first stirring rake 42, first stirring rake 42 uses standpipe 41 to be the central symmetry setting as the center, and the outer wall of the one end fixed connection standpipe 41 of first stirring rake 42, first stirring rake 42 is platelike, set up a plurality ofly on the bottom lateral wall of standpipe 41 and the first liquid hole 43 of standpipe 41 complex, first liquid hole 43 position is connected standpipe 41 lateral wall department with first stirring rake 42 and corresponds, set up a plurality ofly on the top lateral wall of standpipe 41 and first liquid hole 43 complex second liquid hole 44, the top coaxial coupling of standpipe 41 has transfer line 45, the external power source drive of transfer line 45.

When the materials begin to melt, because the surface layer of the materials melts before the interior of the materials, under the action of the stirring device 4, the materials are subjected to friction vibration to enable the melted parts to converge to the bottom of the inner cavity of the furnace pipe 1, and then the materials on the liquid surface melt the surface layer to flow to the bottom of the inner cavity of the furnace pipe 1 under the action of the skin effect, so that the heating process is accelerated.

At the stage after the materials are melted, under the matching of the rotating first stirring paddle 42 and the vertical pipe 41, the melted materials enter the vertical pipe 41 through the first liquid hole 43 and then flow out through the second liquid hole 44, so that the effect of temperature balance between the upper layer and the lower layer is achieved, the time of uneven temperature and excessive heating is reduced, and the heating process is shortened.

The first stirring paddle 42 is arc-shaped, and the free end of the first stirring paddle 42 extends to one side of the rotation direction of the vertical pipe 41. The arc-shaped first stirring paddle 42 can guide the molten material to the first liquid hole 43 to enter the vertical pipe 41 during the rotation process, so that the mixing effect between the upper layer and the lower layer is enhanced, and the time of excessive heating caused by uneven temperature is reduced.

Example 2

As shown in fig. 2-3, the self-stirring induction heating furnace of the present embodiment includes a furnace pipe 1 and a furnace frame 2, the furnace pipe 1 is placed on the furnace frame 2, an induction coil 3 is surrounded on the periphery of the furnace pipe 1, the induction coil 3 is fixed on the furnace frame 2, a stirring device 4 is disposed in an inner cavity of the furnace pipe 1, and a discharge port 5 capable of being opened and closed is installed at the bottom of the furnace pipe 1. The discharge port 5 comprises a discharge pipe 51, one end of the discharge pipe 51 is communicated with the furnace pipe 1, and a valve 52 is arranged on the discharge pipe 51.

Stir device 4 and include standpipe 41, the vertical setting of standpipe 41 is at 1 inner chamber of stove courage, and standpipe 41 and the 1 coaxial setting of stove courage, the both ends of standpipe 41 are all sealed, and the bottom circumference of standpipe 41 is provided with a plurality of first stirring rake 42, first stirring rake 42 uses standpipe 41 to be the central symmetry setting as the center, and the outer wall of the one end fixed connection standpipe 41 of first stirring rake 42, first stirring rake 42 is platelike, set up a plurality ofly on the bottom lateral wall of standpipe 41 and the first liquid hole 43 of standpipe 41 complex, first liquid hole 43 position is connected standpipe 41 lateral wall department with first stirring rake 42 and corresponds, set up a plurality ofly on the top lateral wall of standpipe 41 and first liquid hole 43 complex second liquid hole 44, the top coaxial coupling of standpipe 41 has transfer line 45, the external power source drive of transfer line 45. The first stirring paddle 42 is arc-shaped, and the free end of the first stirring paddle 42 extends to one side of the rotation direction of the vertical pipe 41.

A plurality of second stirring paddles 46 are circumferentially arranged on the pipe wall of the vertical pipe 41 between the first liquid hole 43 and the second liquid hole 44, and one end of each second stirring paddle 46 is fixedly connected with the pipe wall of the vertical pipe 41.

The second stirring paddle 46 is added on the basis of the embodiment 1, so that the stirring effect can be enhanced, the friction vibration between the materials enables the melted parts to converge and flow to the bottom of the inner cavity of the furnace pipe 1, then the materials on the liquid surface melt the surface layer to flow to the bottom of the inner cavity of the furnace pipe 1 under the action of the skin effect, and the heating process is accelerated.

It is noted that, in this document, relational terms such as first and second, and the like, if any, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. From stirring formula induction heating furnace, including stove courage (1) and furnace frame (2), place on furnace frame (2) stove courage (1), and the periphery of stove courage (1) is around having induction coil (3), induction coil (3) are fixed on furnace frame (2), its characterized in that: the inner cavity of the furnace pipe (1) is provided with a stirring device (4), and the bottom of the furnace pipe (1) is provided with a discharge hole (5) which can be opened and closed.

2. The self-stirring induction heating furnace of claim 1, wherein: the stirring device (4) comprises a vertical pipe (41), the vertical pipe (41) is vertically arranged in an inner cavity of a furnace pipe (1), the vertical pipe (41) and the furnace pipe (1) are coaxially arranged, two ends of the vertical pipe (41) are sealed, a plurality of first stirring paddles (42) are circumferentially arranged at the bottom end of the vertical pipe (41), the first stirring paddles (42) are arranged in a central symmetry mode by taking the vertical pipe (41) as a center, one end of each first stirring paddle (42) is fixedly connected with the outer wall of the corresponding vertical pipe (41), each first stirring paddle (42) is plate-shaped, a plurality of first liquid holes (43) matched with the vertical pipe (41) are formed in the side wall of the bottom end of the vertical pipe (41), the positions of the first liquid holes (43) correspond to the side wall of the vertical pipe (41) connected with the first stirring paddles (42), and a plurality of second liquid holes (44) matched with the first liquid holes (43) are formed in the side wall of the top end of the vertical pipe (41), the top end of the vertical pipe (41) is coaxially connected with a transmission rod (45), and the transmission rod (45) is externally connected with a power source for driving.

3. The self-stirring induction heating furnace of claim 2, wherein: a plurality of second stirring paddles (46) are arranged on the circumferential direction of the pipe wall of the vertical pipe (41) between the first liquid hole (43) and the second liquid hole (44), and one end of each second stirring paddle (46) is fixedly connected with the pipe wall of the vertical pipe (41).

4. The self-stirring induction heating furnace according to claim 2 or 3, characterized in that: the first stirring paddle (42) is arc-shaped, and the free end of the first stirring paddle (42) extends to one side of the rotating direction of the vertical pipe (41).

5. The self-stirring induction heating furnace of claim 1, wherein: the discharge hole (5) comprises a discharge pipe (51), one end of the discharge pipe (51) is communicated with the furnace pipe (1), and a valve (52) is installed on the discharge pipe (51).