CN202168231U - Electromagnetic induction heater used for plastic processing device - Google Patents
Electromagnetic induction heater used for plastic processing device Download PDFInfo
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- CN202168231U CN202168231U CN2011202172095U CN201120217209U CN202168231U CN 202168231 U CN202168231 U CN 202168231U CN 2011202172095 U CN2011202172095 U CN 2011202172095U CN 201120217209 U CN201120217209 U CN 201120217209U CN 202168231 U CN202168231 U CN 202168231U
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- electromagnetic induction
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- plastic processing
- induction heater
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Abstract
An electromagnetic induction heater used for a plastic processing device comprises the material barrel of the plastic processing device, a control cabinet and a heating coil, wherein the heating coil is arranged on the material barrel and is connected with the control cabinet, the control cabinet is provided with a main control board, a driving transformer, a driving plate, a power supply, a capacitor and four sets of IGBTs, the capacitor and the heating coil are connected with a full bridge inverter circuit composed of the four sets of IGBTs, the power supply passes through a rectifying circuit and a filtering circuit in order and is connected with the full bridge inverter circuit, and the control terminal of the main control board passes through the driving transformer and the driving plate in order and is connected with the control electrodes of the IGBTs. The electromagnetic induction heater has a simple circuit structure, is low in failure rate, has extra high stability and heating efficiency, can adjust the frequency of alternating current according to demands, and is simple in adjustment and wide in adjusting scope.
Description
Technical field
The utility model relates to a kind of heater of device of plastic processing, specifically a kind of electromagnetic induction heater that is used for device of plastic processing.
Background technology
In commercial production, need the local a lot of of heating, plastic processing, rubber, medical manufacturing and smelting, baking etc. are all accomplished by heating.At present, these technologies all are to buckle heating collar in the barrel outside, and heating collar is resistance wire or resistance bolck normally, and the energising back is conducted to barrel by the heat that resistance produces.Its shortcoming is that the heat efficiency is low, and the heating collar life-span is short, and because 50%-60% heat of heating collar all is radiated in the air ambient; Cause ambient temperature too high; The workman operates under 40 ℃-50 ℃ high temperature, and operational environment is very poor, and the person is had great injury.Electromagnetic induction heating is through in induction coil, feeding the alternating current of certain frequency, around coil, producing alternating magnetic field.The electromagnetic induction effect of alternating magnetic field makes the induced current that produces sealing in the workpiece, i.e. eddy current.The eddy current that produces directly generates heat metal, thereby has reduced thermal loss greatly, has improved capacity usage ratio.According to the energy-saving and environmental protection principle that country vigorously advocates, utilize inductive heating principle, make barrel directly produce heat, reduce radiation, reduce consuming.This directly-heated type technology is compared with the heat conducting indirect mode of original resistance, and programming rate is fast, shortens warm-up time 2/3rds than former electric heating coil heating, has improved production efficiency; Non-thermal radiation, ambient temperature have obtained obvious improvement; Power savings is remarkable, than the electric heating coil heating amount of saving energy 40%-60%.But existing induction heating equipment also has its defective, and the heating power required owing to device of plastic processing is very big, and powerful induction heating equipment poor stability very easily breaks down.Therefore, this problem still has to be solved.
The utility model content
The utility model technical problem to be solved provides a kind of electromagnetic induction heater that is used for device of plastic processing, have stable, failure rate is low, the advantage that firing rate is fast.
The utility model is to solve the problems of the technologies described above the technical scheme that is adopted to be: a kind of electromagnetic induction heater that is used for device of plastic processing; The barrel, control cubicle and the heater coil that comprise device of plastic processing; Heater coil is arranged on the barrel, and is connected with control cubicle.Be provided with master control borad, driving transformer, drive plate, power supply, capacitor and four groups of IGBT in the control cubicle; Capacitor is connected with the full bridge inverter that four groups of IGBT form with heater coil; First group of IGBT is connected with the 4th group of IGBT with heater coil serial connection back with capacitor successively; Second group of IGBT is connected with the 3rd group of IGBT successively with behind heater coil and the capacitor series, and first group of IGBT and second group of IGBT input also connect, and the 3rd group of IGBT and the 4th group of IGBT output also connect; Power supply is connected with full bridge inverter through behind rectification circuit and the filter circuit successively, and the control end of master control borad passes through driving transformer successively and is connected with the control utmost point of IGBT with drive plate.
Also be provided with instrument transformer on the series circuit of described capacitor and heater coil, the output of instrument transformer is connected with the feedback signal test side of master control borad.
In the described full bridge inverter, be equipped with the IGBT of two parallel connections among every group of IGBT.
The connection line of described filter circuit and full bridge inverter was provided with flow sensor, and the output of crossing flow sensor is connected with master control borad.
Described IGBT is provided with water cooling plant, is provided with water cavity in the water cooling plant, and water cavity is provided with water inlet and delivery port.
Described IGBT is provided with temperature sensor, and the water inlet of said water cooling plant is provided with flow sensor, and the output of flow sensor and temperature sensor is connected with the test side of master control borad.
Described heater coil is arranged in the cooling collar, and the coiling mode of cooling collar is identical with the coiling mode of heater coil, is provided with the sleeve pipe import at an end of cooling collar, and the other end is provided with the sleeve pipe outlet.
Described rectification circuit is a bridge rectifier, and described filter circuit is the RC filter circuit.
Described power supply is provided with lack detection circuit and over-voltage detection circuit, and the output of lack detection circuit and over-voltage detection circuit is connected with master control borad respectively.
The beneficial effect of the utility model is: in the present technique scheme, power supply changes alternating current into by full bridge inverter again after over commutation, filtering.In full bridge inverter, adopt the conducting and the shutoff of IGBT Control current, improved the stability and the efficiency of heating surface of load circuit, and simplified the circuit composition, reduced failure rate.After boosting through driving transformer, the control signal of master control borad, adjusts the alternating current that switching frequency can produce different frequency as required, to adapt to the needs of different workpieces by the switch of drive plate control IGBT.On the series circuit of capacitor and heater coil, be provided with instrument transformer, master control borad detects feedback signal according to instrument transformer and adjusts power frequency in real time, thereby improves thermal effectiveness.In the full bridge inverter of present technique scheme; Be equipped with the IGBT of two parallel connections among every group of IGBT; The IGBT of two parallel connections takes turns conducting, and this set mode has reduced the break-make frequency of single IGBT, and the peak frequency that produces alternating current is multiplied; Also reduce the loss of IGBT, improved the stability of a system.In order to protect IGBT, on the connection line of filter circuit and full bridge inverter, flow sensor was set, the output of crossing flow sensor is connected with master control borad, in case over-current phenomenon avoidance breaking circuit at once takes place, prevents beyond the mode.In addition, all be provided with water cooling plant in the present technique scheme on IGBT and the heater coil, adopt cooling water to cool off, this set-up mode cooling effectiveness is high, has improved the stability of equipment greatly.In sum, the heating device circuit of present technique scheme is simple in structure, failure rate is low, has the high stability and the efficiency of heating surface, can adjust the frequency of alternating current as required, adjusts easy and adjusting range is big.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Fig. 2 is the electrical block diagram in the utility model control cubicle.
Fig. 3 is the set-up mode sketch map of full bridge inverter in the utility model.
Fig. 4 is the set-up mode sketch map of cooling collar on the heater coil in the utility model.
Mark among the figure: 1, barrel, 2, control cubicle, 3, capacitor, 4, heater coil, 5, master control borad; 6, driving transformer, 7, drive plate, 8, power supply, 9, full bridge inverter, 10, first groups of IGBT; 11, second group of IGBT, 12, the 3rd groups of IGBT, 13, the 4th groups of IGBT, 14, rectification circuit, 15, filter circuit; 16, instrument transformer, 17, cross flow sensor, 18, temperature sensor, 19, flow sensor, 20, cooling collar; 21, sleeve pipe import, 22, sleeve pipe outlet, 23, lack detection circuit, 24, over-voltage detection circuit.
Embodiment
As shown in the figure, a kind of electromagnetic induction heater that is used for device of plastic processing comprises barrel 1, control cubicle 2 and the heater coil 4 of device of plastic processing, and heater coil 4 is arranged on the barrel 1, and is connected with control cubicle 2.The set-up mode of heater coil can be with reference to existing firing equipment.Be provided with master control borad 5, driving transformer 6, drive plate 7, power supply 8, capacitor 3 and four groups of IGBT in the control cubicle 2, capacitor 3 is connected with the full bridge inverter 9 that four groups of IGBT form with heater coil 4.As shown in Figure 3; The set-up mode of full bridge inverter 9 is: first group of IGBT 10 is connected with the 4th group of IGBT 13 with heater coil 4 serial connection backs with capacitor 3 successively; Second group of IGBT 11 is connected with the 3rd group of IGBT 12 with capacitor 3 serial connection backs with heater coil 4 successively; First group of IGBT 10 and second group of IGBT 11 input also connect, and the 3rd group of IGBT 12 and the 4th group of IGBT 13 outputs also connect.Wherein, first group of IGBT 10 and the 4th group of IGBT 13 conducting simultaneously or shutoffs, second group of IGBT 11 and the 3rd group of IGBT 12 conducting simultaneously or shutoffs.Can in the series circuit of heater coil 4 and capacitor 3, produce alternating current thus.The supply power mode of circuit is as shown in Figure 2, and power supply 8 is connected with full bridge inverter 9 with filter circuit 15 backs through rectification circuit 14 successively, and the control end of master control borad 5 is connected with the control utmost point of IGBT with drive plate 7 through driving transformer 6 successively.After the control signal of master control borad 5 is amplified through driving transformer 6, by conducting and the shutoff of drive plate 7 control IGBT.The set-up mode of control signal and the set-up mode of control circuit can adopt prior art.For the power frequency and the bearing power of real-time regulated feeding heater coil, on the series circuit of capacitor 3 and heater coil 4, instrument transformer 16 is set, the output of instrument transformer 16 is connected with the feedback signal test side of master control borad 5.Master control borad 5 is controlled according to feedback signal.
As shown in Figure 3, in the described full bridge inverter 9, be equipped with the IGBT of two parallel connections among every group of IGBT.The IGBT of two parallel connections takes turns conducting, and this set mode has reduced the break-make frequency of single IGBT, and the peak frequency that produces alternating current is multiplied, and has also reduced the loss of IGBT, has improved the stability of a system.
Described filter circuit 15 was provided with flow sensor 17 with the connection line of full bridge inverter 9, and the output of crossing flow sensor 17 is connected with master control borad 5.The output of crossing flow sensor 17 is connected with master control borad 5.Master control borad 5 control circuits turn-off when electric current surpasses set point, prevent danger or infringement.
In order to reduce the infringement that the IGBT heating brings, water cooling plant can be set on IGBT, be provided with water cavity in the water cooling plant, water cavity is provided with water inlet and delivery port, in water cavity, feeds recirculated water to reduce the temperature of IGBT.
In order to prevent that fortuitous event from causing the overheated infringement that brings of IGBT, temperature sensor 18 is set on IGBT, be used for monitoring in real time the temperature of IGBT.Water inlet at the water cooling plant of IGBT is provided with flow sensor 19, monitors the water flowing situation of water cooling plant in real time, prevents that accident from cutting off the water supply.The output of flow sensor 19 and temperature sensor 18 is connected with the test side of master control borad 5.
Because the power when metal works is heat-treated is very high, the equipment heating amount is big, and especially heater coil 4, as can not in time lowering the temperature, will cause very big infringement to equipment, reduces useful life.As shown in Figure 4, described heater coil 4 is arranged in the cooling collar 20, and the coiling mode of cooling collar 20 is identical with the coiling mode of heater coil 4, is provided with sleeve pipe import 21 at an end of cooling collar 20, and the other end is provided with sleeve pipe outlet 22.In cooling collar 20, feeding recirculated water cools.The lead of this type of cooling heater coil 4 directly contacts with cooling water, and cooling efficient is high.
Described rectification circuit 14 is a bridge rectifier, and described filter circuit 15 is the RC filter circuit.
Described power supply 8 is provided with lack detection circuit 23 and over-voltage detection circuit 24, and the output of lack detection circuit 23 and over-voltage detection circuit 24 is connected with master control borad 5 respectively.
Claims (9)
1. electromagnetic induction heater that is used for device of plastic processing; The barrel (1), control cubicle (2) and the heater coil (4) that comprise device of plastic processing; Heater coil (4) is arranged on the barrel (1); And be connected with control cubicle (2); It is characterized in that: be provided with master control borad (5), driving transformer (6), drive plate (7), power supply (8), capacitor (3) and four groups of IGBT in the control cubicle (2); Capacitor (3) is connected with the full bridge inverter (9) that four groups of IGBT form with heater coil (4), and first group of IGBT (10) is connected with the 4th group of IGBT (13) with heater coil (4) serial connection back with capacitor (3) successively, and second group of IGBT (11) is connected with the 3rd group of IGBT (12) with capacitor (3) serial connection back with heater coil (4) successively; First group of IGBT (10) and second group of IGBT (11) input also connect, and the 3rd group of IGBT (12) and the 4th group of IGBT (13) output also connect; Power supply (8) passes through rectification circuit (14) successively and is connected with full bridge inverter (9) with filter circuit (15) back, and the control end of master control borad (5) passes through driving transformer (6) successively and is connected with the control utmost point of IGBT with drive plate (7).
2. a kind of electromagnetic induction heater that is used for device of plastic processing as claimed in claim 1; It is characterized in that: also be provided with instrument transformer (16) on the series circuit of described capacitor (3) and heater coil (4), the output of instrument transformer (16) is connected with the feedback signal test side of master control borad (5).
3. a kind of electromagnetic induction heater that is used for device of plastic processing as claimed in claim 1 is characterized in that: in the described full bridge inverter (9), be equipped with the IGBT of two parallel connections among every group of IGBT.
4. a kind of electromagnetic induction heater that is used for device of plastic processing as claimed in claim 1; It is characterized in that: described filter circuit (15) was provided with flow sensor (17) with the connection line of full bridge inverter (9), and the output of crossing flow sensor (17) is connected with master control borad (5).
5. a kind of electromagnetic induction heater that is used for device of plastic processing as claimed in claim 1, it is characterized in that: described IGBT is provided with water cooling plant, is provided with water cavity in the water cooling plant, and water cavity is provided with water inlet and delivery port.
6. a kind of electromagnetic induction heater that is used for device of plastic processing as claimed in claim 5; It is characterized in that: described IGBT is provided with temperature sensor (18); The water inlet of said water cooling plant is provided with flow sensor (19), and the output of flow sensor (19) and temperature sensor (18) is connected with the test side of master control borad (5).
7. a kind of electromagnetic induction heater that is used for device of plastic processing as claimed in claim 1; It is characterized in that: described heater coil (4) is arranged in the cooling collar (20); The coiling mode of cooling collar (20) is identical with the coiling mode of heater coil (4); End at cooling collar (20) is provided with sleeve pipe import (21), and the other end is provided with sleeve pipe outlet (22).
8. a kind of electromagnetic induction heater that is used for the heating of metal workpiece as claimed in claim 1 is characterized in that: described rectification circuit (14) is a bridge rectifier, and described filter circuit (15) is the RC filter circuit.
9. a kind of electromagnetic induction heater that is used for the heating of metal workpiece as claimed in claim 1; It is characterized in that: described power supply (8) is provided with lack detection circuit (23) and over-voltage detection circuit (24), and the output of lack detection circuit (23) and over-voltage detection circuit (24) is connected with master control borad (5) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202172095U CN202168231U (en) | 2011-06-24 | 2011-06-24 | Electromagnetic induction heater used for plastic processing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202172095U CN202168231U (en) | 2011-06-24 | 2011-06-24 | Electromagnetic induction heater used for plastic processing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202168231U true CN202168231U (en) | 2012-03-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202172095U Expired - Fee Related CN202168231U (en) | 2011-06-24 | 2011-06-24 | Electromagnetic induction heater used for plastic processing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202168231U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103715912A (en) * | 2013-11-22 | 2014-04-09 | 哈尔滨宏宇整流开关厂 | Intelligent temperature control device of mold pressing platform variable-frequency power source |
| CN103854597A (en) * | 2012-11-29 | 2014-06-11 | 利亚德光电股份有限公司 | LED display and LED control system |
-
2011
- 2011-06-24 CN CN2011202172095U patent/CN202168231U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103854597A (en) * | 2012-11-29 | 2014-06-11 | 利亚德光电股份有限公司 | LED display and LED control system |
| CN103854597B (en) * | 2012-11-29 | 2016-08-10 | 利亚德光电股份有限公司 | Light-emitting diode display and LED control system |
| CN103715912A (en) * | 2013-11-22 | 2014-04-09 | 哈尔滨宏宇整流开关厂 | Intelligent temperature control device of mold pressing platform variable-frequency power source |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: HENAN HUAZHONG ELECTRONIC EQUIPMENT MANUFACTURING CO., LTD. Assignor: Pingdingshan Hongfa Material Trade Co., Ltd. Contract record no.: 2014410000063 Denomination of utility model: Electromagnetic induction heater used for plastic processing device Granted publication date: 20120314 License type: Exclusive License Record date: 20140711 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120314 Termination date: 20150624 |
|
| EXPY | Termination of patent right or utility model |