WO2019098411A1

WO2019098411A1 - Drawing roller and induction heating roller device employing same

Info

Publication number: WO2019098411A1
Application number: PCT/KR2017/012990
Authority: WO
Inventors: 조정혁
Original assignee: (주)동화하이테크
Priority date: 2017-11-16
Filing date: 2017-11-16
Publication date: 2019-05-23

Abstract

The present invention relates to a drawing roller and an induction heating roller device, wherein electric energy is converted into thermal energy by electromagnetic induction so as to heat an object. The present invention provides a drawing roller having a winding configured around the outer peripheral surface of a core to be able to generate heat, wherein a work coil is wound around the outer peripheral surface of the core so as to form a magnetic field in such a direction that the same rotates around the center axis of the core. In addition, an induction heating roller device to which the above structure is applied comprises: a rotating shaft; a base having a bearing provided such that the same rotatably supports the rotating shaft; a core fixedly installed on the base; a work coil wound around the outer peripheral surface of the core so as to form a magnetic field in such a direction that the same rotates around the center axis of the core; and a controller for selectively applying a current to the work coil so as to perform heating control. The present invention, which has the above structure, is advantageous in that, since the work coil wound outside the core forms a magnetic field in a direction intersecting with the longitudinal direction of the core, loss resulting from superimposition of magnetic fields can be reduced substantially, and heat generating efficiency can be improved accordingly.

Description

Drawing roller and induction heating roller device using it

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stretching roller for heating and converting electric energy into heat energy by electromagnetic induction, and an induction heating roller device using the same.

Generally, the stretching roller generates heat by using an induction coil provided inside the roller. To this end, the stretching roller has an iron core inside the roller, and an induction coil is continuously wound on the outer circumferential surface along the longitudinal direction of the iron core.

When a current is applied to the stretching roller having such a structure, magnetic force lines corresponding to the winding form of the induction coil are generated, and an eddy current induced by the magnetic force lines flows to the roller surface to generate heat.

On the other hand, the stretching roller according to the related art has a problem that the temperature distribution is different in the longitudinal direction of the roller.

Particularly, there is a problem that the surface temperature of the roller corresponding to the portion where the winding of the induction coil starts and ends is relatively lower than that of the central portion of the roller.

Therefore, when the temperature of the induction coil is controlled by the target of the temperature of the central portion, the edge portion of the roller can not perform the effective heat generation function. When the temperature of the edge portion is controlled, It has a problem that it becomes too high.

In order to solve such a problem, various research and development have been carried out in the field of stretching roller technology in order to make the surface temperature of the roller uniform.

For example, FIG. 1 shows an embodiment of a drawing roller according to the prior art, and FIG. 2 is a view showing a temperature characteristic curve of the coil winding structure as shown in FIG.

Referring to these drawings, the drawing roller according to the related art is provided with a spindle 9 rotatably by a bearing 8 provided inside a housing 11, and a coil support 5 outside the spindle 9, And the high-defect jacket 2 are arranged concentrically.

The coil support 5 is fixed to the housing 11 and coils 1 are individually wound on each U-shaped carrier 3 after a plurality of U-shaped carriers 3 are concentrically arranged. Structure.

Therefore, the entire area of the high-defect jacket 2 can be separately heated by the coils 1 individually wound on the respective U-shaped carriers 3, so that the central portion and the edge portions of the high- Level temperature range.

However, in the above-described conventional art, the magnetic force lines of the individual coils 1 are formed along the longitudinal direction of the high-precision jacket 2, thereby causing loss.

2, a magnetic field is formed along the longitudinal direction of the high-precision jacket 2, and a magnetic field formed in each coil 1 has an overlap region L The loss of the magnetic flux may occur and the efficiency may be lowered.

In order to solve such a problem, the U-shaped carrier 3 is applied in the prior art, but it has an additional problem that workability such as an increase in the number of workings due to the installation of the carrier and a difficulty in the coil winding is deteriorated.

It is an object of the present invention to provide a stretching roller capable of improving the winding structure of a coil to reduce loss of magnetic flux.

It is another object of the present invention to provide an induction heating roller device in which the elongating roller is divided into a plurality of sections so that individual temperature control is performed, and temperature changes in each section are sensed for predictive maintenance.

The present invention is characterized in that a drawing coil is wound around an outer circumferential surface of the core to form a magnetic field in a direction rotating about a central axis of the core,

An induction heating roller device according to the present invention comprises a rotating shaft, a base provided with a bearing and rotatably supporting the rotating shaft, a core fixedly installed on the base, and a core wound around the outer periphery of the core, And a controller for selectively applying a current to the work coil to perform heat generation control.

The core is further provided with a plurality of partition members, and a work coil is wound between the partition members to form a separate induction heating unit.

And a sensor for sensing the temperature of the individual induction heating unit and transmitting the detected temperature to the control unit is further provided on one side of the roller.

The sensor is a multi-point sensor, and the sensing temperature of the individual induction heating unit is individually transmitted to the control unit through the wireless input / output means.

The individual sensed temperatures are cumulatively stored in the memory, and the temperature information stored in the memory can be displayed in real time by the user through the display.

The control unit sets an individual abnormal temperature range for defining the individual abnormal state of the corresponding work coil based on the accumulated temperature sensing information for each induction heating unit stored cumulatively.

The control unit sets an individual normal temperature range for defining the individual normal operation state of the corresponding work coils based on the accumulated temperature sensing information for each induction heating unit stored cumulatively, And generates a notification signal for notifying an abnormal situation when the mobile terminal is out of the mobile terminal.

The control unit generates a control signal for stopping the operation of the entire induction heating unit when at least one induction heating temperature is out of the set allowable temperature range, .

Since the direction of the magnetic field is formed in the direction that the magnetic field is rotated in the direction of the center axis of the core by the work coil wound on the outer side of the core, the loss due to the superposition of the magnetic field can be drastically reduced, .

In addition, the induction heating roller device according to the present invention can individually measure the temperature of each region by using a multi-point probe in a structure for individually controlling regions divided along the longitudinal direction of the core, have.

In addition, it is possible to distinguish the normal range from the abnormal range on the basis of the accumulated data and to generate an alarm when the temperature of the abnormal range is sensed, so that before the failure condition of the induction heating roller device occurs, Can be confirmed in advance.

In addition, the preventive maintenance can be performed by allowing the user to confirm the abnormality information of the apparatus in advance as described above, thereby improving the service life of the apparatus.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing an embodiment of an induction heating roller apparatus according to the prior art; Fig.

2 is a view showing a temperature characteristic curve of the coil winding structure as shown in Fig.

3 is a view for explaining a detailed structure of an embodiment of a stretching roller according to the present invention.

4 is a view for explaining a feature of a work coil which is a main constituent of the present invention;

5 is a view for explaining the detailed structure of the path heating roller apparatus of the present invention.

6 is a view for showing a control configuration according to the embodiment shown in Fig.

FIGS. 7 to 9 are views for explaining a driving process of the embodiment shown in FIG. 5;

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. It is to be understood, however, that the spirit of the invention is not limited to the embodiments shown and that those skilled in the art, upon reading and understanding the spirit of the invention, may easily suggest other embodiments within the scope of the same concept.

FIG. 3 is a view for explaining a detailed structure of an embodiment of a stretching roller according to the present invention, and FIG. 4 is a view for explaining a feature of a work coil constituting a main component of the present invention.

Referring to these drawings, the stretching roller according to the present invention includes a rotation shaft 310 rotatably mounted on a base 180, a fixed core 320, A coil 400, and a roller 200 to which heat generated in the work coil 400 is transferred.

In detail, the base 180 is provided with a bearing 140.

The bearing 140 is configured to rotatably fix at least one end of the rotation shaft 310 and is provided at both ends of the rotation shaft 310 in the present embodiment. However, the bearing 140 may be configured as a cantilever A plurality of rotation shafts 310 may be provided at one end of the rotation shaft 310.

The core 320 is concentrically disposed on the outer side of the rotation shaft 310, which is rotatably installed as described above.

In detail, the core 320 is hollow and internally fixed to the base 180.

Therefore, even when the rotation shaft 310 rotates, the core 320 is held at a fixed position, and the work coil 400 is wound around the fixed core 320 along the outer circumferential surface.

The work coil 400 is configured to include a core 420 and an induction winding 440 as shown in FIG.

The induction winding 440 is wound along the outer circumferential surface of the core material and the core material 420 wound with the induction winding 440 is wound around the outer circumferential surface of the core 320.

That is, the stretching roller according to the present invention takes up the work coil 400 having the above-described structure on the core 320 so that the direction of the magnetic field is formed in a direction rotating about the central axis of the core 320. Therefore, the loss of magnetic flux due to superimposition can be effectively reduced, and the heat generation efficiency can be improved.

Meanwhile, the induction heating device constructed based on the stretching roller having the above-described characteristics can be configured to divide the entire region of the roller 200 into a plurality of regions and to control the temperature individually.

FIG. 5 is a view for explaining the detailed structure of the induction heating roller apparatus according to the present invention, and FIG. 6 is a view for showing a control arrangement according to the embodiment shown in FIG.

Referring to these figures, in this embodiment, a plurality of partition members 460 for partitioning the core 320 into a plurality of spaces along the longitudinal direction is disposed on the outer peripheral surface of the core 320. [

The partition member 460 is disposed concentrically with the core 320 and may be formed of an insulating material and may be fitted to the outer circumferential surface of the core 320.

When the partition member 460 is mounted as described above, the work coil 400 described above is wound between the partition members 460 to form a separate induction heating unit.

To this end, the induction heating portion of the present embodiment includes individually wound work coils 400 and a plurality of voltage regulators (not shown), and at least one work coil 400 is connected to one voltage regulator to be separately controlled have.

Meanwhile, a sensor may be further provided on one side of the roller 200 to correspond to the induction heating portions, respectively.

In detail, the sensor is provided along the longitudinal direction inside the roller 200, and each of the individually separated inductions is configured to detect an individual temperature at a position corresponding to the heating part.

For this, in the present embodiment, temperature sensing of each section is performed using the multi-point probe 600, and the sensing information of the multi-point probe 600 is transmitted to the controller 810 through the wireless input / output means .

In the present embodiment, the wireless input / output means includes a first input / output connector 820 for receiving and transmitting temperature information sensed from the multi-point probe 600, and a second input / output connector 820 for transmitting temperature information wirelessly transmitted to the controller 810 And a second input / output connector 840 for transferring data.

In the multi-point probe 600, a plurality of thermocouples are formed to have different lengths, and each induction is located so as to correspond to the heat part.

That is, the sensing information of the multi-point probe 600 configured as described above is transmitted to the first input / output connector 820 and the second input / output connector 820 at a position spaced apart from the first input / (820).

The first and second input /

output connectors

820 and 840 may include a communication module for wireless communication, and the individual temperature information received through the second input / output connector 840 may be transmitted to the controller 810, And stored in the memory 890 in a cumulative manner.

The temperature information stored in the memory 890 allows the user to select and check the state of the individual induction heating unit through the GUI-based display 500.

On the other hand, the controller 810 performs the real time monitoring of the induction heating roller based on the temperature information sensed as described above and the predictive maintenance operation based on the cumulative stored information.

To this end, the control unit 810 sets an individual abnormal temperature range for defining the individual abnormal state of the corresponding work coil 400 on the basis of the temperature sensing information for each induction heating column stored cumulatively.

FIGS. 7 to 9 are views for explaining a driving process of the embodiment shown in FIG.

Referring to these drawings, a plurality of repeated setting operations can be performed to set the individual abnormal temperature range.

In detail, in the process of setting the individual abnormal temperature range, the operation setting using the induction heating roller apparatus according to the present invention is performed, and the induction heating is started by turning on the entire induction heating unit according to the set operation.

During the induction heating as described above, individual induction heating per temperature is detected through the multi-point probe 600 and the sensing temperature is controlled by the controller 810 through the first and second input /

output connectors

820 and 840, And stored in the memory 890 in a cumulative manner.

The above process is performed a predetermined number of times to accumulate cumulative data for the job, and the induction heating temperature range for each section of the job is determined by reflecting the temperature interval of the secured data.

Herein, the induction heating temperature range for each section can be determined by setting the upper limit and the lower limit allowable temperature range based on the average temperature except for the driving initial temperature rising period and the driving end temperature falling period for each heating part of the individual induction.

In addition, the control unit 810 may set an individual normal temperature range for defining the individual normal operation states of the corresponding work coils 400 based on the temperature sensing information for each induction heating unit stored cumulatively.

The individual normal temperature range may be defined in a range not including the upper limit and the lower limit in the same manner as the induction heating temperature range.

The control unit 810 can generate a notification signal for notifying an abnormal situation when at least one part of the sensed temperature deviates from the individual normal temperature range by using the individual normal temperature range set as described above.

To this end, the induction heating roller device according to the present invention may further include an alarm means for transmitting an alarm sound or an alarm message or informing the user of an abnormal situation by using a lamp or the like.

In addition, the control unit 810 may generate a control signal for stopping the operation of the entire induction heating unit when the temperature continuously increases after the alarm means is operated and out of the allowable temperature range.

In addition, the display 500 shows an induction heating unit in which an overheating is generated in the induction heating part together with an interruption condition, so that the user can check the induction heating part so that a defect or malfunction of the induction heating roller device can be promptly dealt with.

Meanwhile, the temperature information obtained through the above-described control process may be accumulated in the memory 890 to form a database for each task.

That is, a defect or a malfunction temperature range can be set in the control unit 810 in addition to the normal operation temperature range and the allowable temperature range for each job. By notifying the user through the warning means and the display using the malfunction temperature range, Maintenance can be done.

INDUSTRIAL APPLICABILITY The induction heating roller device according to the present invention can be applied to an apparatus for drawing a fiber or a film and can be widely used as a heating apparatus in various industrial fields as heat efficiency is improved compared to an existing structure.

Claims

A stretching roller configured to be wound around an outer circumferential surface of a core to generate heat,

And a work coil is wound around the outer circumferential surface of the core to form a magnetic field in a direction rotating about the center axis of the core.
A rotating shaft;

A base provided with a bearing and rotatably supporting the rotation shaft;

A core fixedly installed on the base;

A work coil wound around an outer circumferential surface of the core to form a magnetic field in a direction rotating about the central axis of the core; And

And a control unit for selectively applying a current to the work coil to control the heat generation.
3. The method of claim 2,

Wherein the core further comprises a plurality of partition members, and a work coil is wound between the partition members to form a separate induction heating unit.
The method of claim 3,

And a sensor for sensing the temperature of the individual induction heating unit and transmitting the detected temperature to the control unit is further provided on one side of the roller.
5. The method of claim 4,

Wherein the sensor is a multi-point sensor, and the sensing temperature of the individual induction heating unit is individually transmitted to the control unit through the wireless input / output means.
The method according to claim 4 or 5,

Wherein the temperature sensed by the temperature sensor is accumulated in the memory, and the temperature information stored in the memory is real-time verifiable by the user through the display.
The method according to claim 4 or 5,

Wherein the control unit sets an individual abnormal temperature range for specifying a different abnormal state of the corresponding work coil based on the accumulated temperature sensing information for each induction heating unit stored cumulatively.
The method according to claim 4 or 5,

The control unit sets an individual normal temperature range for defining the individual normal operation states of the corresponding work coils based on accumulated temperature sensing information for each induction heating unit stored cumulatively,

And generates a notification signal to notify of an abnormal situation when at least a part of the sensed temperature deviates from the respective normal temperature range.
9. The method of claim 8,

The control unit generates a control signal for stopping the operation of the entire induction heating unit when at least one induction heating temperature is out of the set allowable temperature range, To the heating roller unit.