CN106903932A - A kind of Corrugating Machine Electromechanic heating roller and its application and Corrugating Machine electromagnetic heating method - Google Patents

Abstract

The invention discloses an electromagnetic heating roller for a corrugating machine, an application thereof and an electromagnetic heating method for a corrugating machine, belonging to the technical field of electromagnetic heating. The electromagnetic heating roller includes a roller body and an electromagnetic heater. The electromagnetic heater is used to heat the roller body; Steam is generated in the cavity; the electromagnetic heater includes a plurality of U-shaped magnets and electromagnetic wires, and the plurality of U-shaped magnets are arranged side by side in a straight line along the axial direction of the roller body; the electromagnetic wires are wound on the U The two ends of the type magnet form a coil. The electromagnetic heating roller of the invention can uniformly heat the corrugated paper, ensure the moisture balance of the corrugated paper in the entire width direction, and improve product quality.

Description

Electromagnetic heating roller for corrugating machine and its application and electromagnetic heating method for corrugating machine

technical field

The invention belongs to the technical field of electromagnetic heating, and relates to an electromagnetic heating roller applied to a corrugating machine, more specifically, to an electromagnetic heating roller for a corrugating machine, its application and an electromagnetic heating method for a corrugating machine.

Background technique

The packaging machinery industry is one of the important pillar industries of my country's national economy. Corrugated cardboard is produced by packaging machinery. It is a common material for paper packaging boxes. It is a plate made of liner paper and corrugated corrugated paper formed by corrugating roller processing. It is more dense than wooden boxes. It is light, hard, and easy to cut in size. It can protect other packaged products from damage. It is light and beautiful, suitable for large-scale production, especially easy to recycle and reuse, and is widely used.

The corrugating machine is mainly composed of corrugating forming mechanism, gluing mechanism, humidifying mechanism, power and transmission system, electric control system, pneumatic system, steam pipeline, paste supply pipeline, etc. The corrugating forming mechanism is mainly composed of upper corrugating roller and lower corrugating roller Composed of pressure rollers, the main function of the single-sided corrugating machine is to heat-press the base paper into corrugated paper with corrugated corrugations through the upper corrugating roller and the lower corrugating roller, and at the same time, paste the paste on one side of the corrugated paper through the pasting roller and pasting cutter roller. Side, glued together with another flat base paper to form a single-sided corrugated cardboard with corrugated paper on one side and plane paper on the other. When using a corrugating machine to produce flute base paper, it must be preheated to evaporate the excess water in the base paper, and at the same time adjust the moisture of the base paper in the entire width direction, and ensure the temperature required for the base paper forming. Otherwise, the base paper cannot be formed or the corrugated cardboard cannot meet the requirements after forming, so it is very important to ensure the uniform temperature of the surface of the corrugating roller for the forming of the base paper. The traditional heating methods mainly include: (1) heating by burning coal in a boiler to generate steam, and the heat energy utilization rate of this method is only 40%; (2) directly heating corrugated rollers and other carriers by burning liquefied gas (commonly known as coal gas), In this way, the thermal energy utilization rate can only reach 50%; (3) use the burner to heat the heat transfer oil, and then use the oil pump to circulate into the corrugated roller for heating, and the thermal energy utilization rate is only 30% to 40%; (4) In the Electric heating tubes are installed in the corrugating rollers, and carbon brushes are used to turn on the current for heating. The utilization rate of heat energy in this way is only 40% to 50%. Heat conduction oil furnace, resistance wire (quartz tube) heating and liquefied gas heating, among which coal burning and liquefied heating gas will pollute the atmosphere, oil heating and resistance wire heating are also due to low thermal efficiency, large heat loss, large power loss, and pollution Problems such as the environment, short service life, and high maintenance costs have restricted the development of the industry.

Facing the development of low-carbon economy in our country, adjusting the industrial structure and replacing those products and production methods with high energy consumption, high emissions and high pollution with low-consumption, low-emission, high-efficiency, energy-saving and environmentally friendly products and clean production methods have become the key points of the packaging machinery industry. Direction of development. In response to the above problems, electromagnetic heating devices have been used in the prior art to overcome the shortcomings of traditional corrugator heating methods. Variable magnetic field, when the magnetic force lines in the magnetic field pass through the magnetic conduction roller of the corrugating machine, countless small eddy currents will be generated in the roller body, so that the metal material of the pit roller itself will heat itself at a high speed, thereby achieving the heating effect. For example, the Chinese patent application number is: 201220555286.6, and the publication date is: the patent document on April 24, 2013, which discloses a single-sided corrugated cardboard produced by an electromagnetic heating single-sided corrugating machine (it is made of a layer of paper laminated on a corrugated core. The new technology formed on paper can solve the deficiency of the traditional heating method in the cardboard production equipment industry. This scheme adopts the external electromagnetic induction heating, which is installed on the surface of the corrugating roller, preheating roller and pressure roller, without changing the main body of the corrugating machine The shape structure mainly adopts the most advanced magnetic field induction eddy current heating technology at the forefront of today's science and technology, that is, the current passes through the coil to generate a magnetic field. High-speed heat generation reaches the temperature required by the heating object (corrugating roll and pressure roll).

Similarly, the applicant has also devoted himself to the research of electromagnetic heating methods in corrugated paper production, and applied for an invention patent, the application number is: 201410182319.0, the publication date is: July 23, 2014, and the name is: a corrugated paper An electromagnetic induction heating device and a method of use thereof. The device includes a heating system, and also includes a control system, a pressure sensor, a radiator group, a water supply pipe, a water return system, a water adding system and a water level sensor. The heating system is composed of a heating coil and a heating cylinder, and the heating coil is wound on the heating cylinder. The top of the heating cylinder communicates with one end of the radiator group through a pipeline, and the other end of the radiator group communicates with the return water system, the water adding system and the bottom of the heating cylinder through pipelines in turn. The device heats the water circulation through the electromagnetic heating system and then passes it into corrugated rollers and other carriers for heating, so as to achieve the purpose of temperature control during production.

Although the use of electromagnetic heating is more environmentally friendly than traditional coal and liquefied gas combustion methods, and the heat utilization rate has also been greatly improved, but through long-term actual use, it has been found that the electromagnetic induction coil is generally spirally wound into a cake shape, and the corrugated rollers and other magnetic conduction The metal is only located on one side of the coil, so that only half of the magnetic force lines are passed by the magnetic metal, and the other half of the magnetic force lines pass through the air to form a loop, so only half of the magnetic field is used, not effectively used, and its magnetic conversion rate is not high.

In addition, in the production of corrugated paper, the width of the paper is smaller than the length of the heating roller, especially in the production of small-sized corrugated paper, the paper width is much smaller than the length of the heating roller, and currently the heating roller is passed through a heat-conducting medium, such as water and heat-conducting oil, from one end of the roller. In, the roller is heated and then passed out from the other end, and then heated and introduced into the roller to form a recycled use. The part in the middle of the base paper and the roller is in contact with the position. Even the above-mentioned design of the applicant also adopts this method, but because the base paper Evaporation of medium water will take away most of the heat of the heat transfer medium in the roll, while the two ends of the width direction of the base paper will take away less heat, and the temperature of the roll surface at both ends will be higher, resulting in the temperature in the entire width direction of the base paper, hot at both ends and low in the middle. High and low flute phenomenon, uneven heating of corrugated paper, and uneven moisture content of the base paper in the entire width direction often result in the failure of the base paper to be formed or the quality of the formed corrugated board cannot meet the requirements. At present, the above-mentioned problems have not been effectively solved, and the present invention is proposed for these two problems.

Contents of the invention

1. Problems to be solved

Aiming at the problem that the existing corrugating machine heats the base paper unevenly in the production of corrugated paper, which leads to the uneven moisture content of the base paper in the entire width direction and causes the base paper to be unable to be formed or the corrugated cardboard after forming cannot meet the requirements, the invention provides a corrugating machine. An electromagnetic heating roller and its application and an electromagnetic heating method for a corrugating machine, the use of the electromagnetic heating roller can uniformly heat corrugated paper, and ensure the moisture balance of the corrugated paper in the entire width direction. In addition, the electromagnetic heating roller also optimizes the design of the electromagnetic heating method. Compared with the existing electromagnetic heating, the magnetic conversion rate is greatly improved, the heating efficiency is high, and the magnetic radiation is small. The electromagnetic heating method of the corrugating machine can quickly and efficiently heat the corrugated paper, the heating temperature is controlled stably, and the corrugated paper is heated evenly.

2. Technical solution

In order to solve the above problems, the present invention adopts the following technical solutions.

An electromagnetic heating roller for a corrugating machine, comprising a roller body and an electromagnetic heater, the electromagnetic heater is used to heat the roller body; the roller body has a cavity for encapsulating a heat-conducting liquid, and the electromagnetic heater can heat the heat-conducting liquid through the roller body Heating is applied to generate steam in the cavity of the roll body.

As a further improvement, the electromagnetic heater includes a plurality of U-shaped magnets and electromagnetic wires, and the plurality of U-shaped magnets are arranged side by side on a straight line along the axial direction of the roller body; the electromagnetic wires are wound on the The two ends of the U-shaped magnet form a coil.

As a further improvement, the coils made by firing the electromagnetic wires at both ends of the same U-shaped magnet have opposite directions of rotation, and the adjacent ends of two adjacent U-shaped magnets are combined together as an iron core to wind the coil.

As a further improvement, a heat insulating pad is provided above the U-shaped magnet, and a fan is provided at the bottom thereof.

As a further improvement, it also includes a pressure monitor; the pressure monitor includes a mounting seat installed at the center of rotation of the end of the roller body, a bearing seat and a load cell; the bearing seat is fixed on the frame, and its interior The bearing is installed, and the mounting seat is connected with the bearing seat through the bearing; the load measuring element is arranged on the mounting seat, and one end of the monitoring hole in the mounting seat is connected to the load measuring element, and the other end is connected to the cavity of the roller body; The signal line of the pressure element is connected to the inner ring of the bearing, and the outer ring of the bearing can be connected to the control circuit through the line.

As a further improvement, the mounting base is connected to one end of the rotating shaft, and the other end of the rotating shaft is inserted into the inner ring of the bearing; the rotating shaft is provided with an inner wiring hole, and the signal line of the load cell passes through the inner wiring hole and is then connected to the inner ring of the bearing. inner circle.

As a further improvement, a safety valve is installed on the installation seat, and the safety valve communicates with the monitoring hole in the installation seat.

The application of the above-mentioned electromagnetic heating roller for a corrugating machine in a corrugating machine is used to heat the upper corrugating roller, the lower corrugating roller and/or the pressure roller of the corrugating machine.

An electromagnetic heating method for a corrugating machine, the operation steps of which are as follows: the electromagnetic heater heats the roll body, the heat-conducting liquid in the cavity of the roll body is heated to generate steam, and when the vapor pressure in the cavity of the roll body reaches the set pressure, the electromagnetic heating is controlled The heater stops heating; by controlling the start and stop of the electromagnetic heater heating, the vapor pressure in the cavity of the roller body is guaranteed to be relatively stable.

As a further improvement, the set value of the vapor pressure in the cavity of the roller body is 0.8 MPa.

3. Beneficial effects

Compared with the prior art, the beneficial effects of the present invention are:

(1) The electromagnetic heating roller for the corrugating machine of the present invention is different from the prior art in which the heated heat-conducting liquid is passed in from one end of the roller body and passed out from the other end, and the closed cavity is cleverly designed in the roller body Body, the form of heat-conducting liquid encapsulated in the cavity, heating the roller body, the heat-conducting liquid is heated to generate steam, when the steam pressure is constant, the steam temperature is relatively constant, which can ensure that the surface temperature of the roller body remains balanced and consistent during the working process of the roller body, avoiding The high and low corrugation phenomenon pointed out in the background technology appears, thereby ensuring the moisture balance of the base paper in the entire width direction and improving product quality; and this structural design simplifies the complexity of the roller body and reduces production costs; the electromagnetic heating method is adopted , more energy-saving and environmentally friendly, and the electromagnetic heater is small and compact, and the startup speed is fast, making the heating operation convenient and easy to control;

(2) The electromagnetic heating roller for the corrugating machine of the present invention, the electromagnetic heater adopts a plurality of U-shaped magnets side by side and uses an electromagnetic wire single circuit to form a coil structure at the two ends of the U-shaped magnet, and the bottom of the U-shaped magnet basically has no magnetic field , the magnetic field lines basically pass through the inside of the U-shaped magnet, and the magnetic field lines above the U-shaped magnet pass through the roller body, so that the magnetic radiation is small, the electromagnetic conversion rate is high, and it is basically converted into heat energy. The conversion rate can reach more than 99%, so that the heating speed It is also fast and efficient; multiple U-shaped magnets are arranged side by side and a single electromagnetic wire is used to wind the magnetic field changes of each U-shaped magnet to maintain synchronization without offsetting, further improving the magnetic utilization rate, and the design is reasonable;

(3) The electromagnetic heating roller for the corrugating machine of the present invention is provided with a thermal insulation pad above the U-shaped magnet, which greatly reduces the heat transfer of the roller body to the U-shaped magnet, prevents the electromagnetic heater from being burned, and protects the electromagnetic heater; at the same time, A fan is installed at the bottom of the U-shaped magnet to cool it down and further protect the electromagnetic heater so that it can work continuously and stably and improve its service life;

(4) The electromagnetic heating roller for the corrugating machine of the present invention uses a pressure monitor to monitor the vapor pressure in the roller body. The pressure monitor is provided with a monitoring hole in the mounting seat, and is connected to the pressure measuring element, and the mounting seat is installed on the roller body. The center of rotation at the end, such as the upper corrugating roll, lower corrugating roll or pressure roll, can timely and accurately feedback the steam pressure in the roll body and generate an electrical signal, and transmit the signal to the control circuit, so as to know the temperature of the roll body and control the electromagnetic heating The start and stop of the device; more importantly, the mounting seat and the bearing seat are connected through the bearing, and the signal line of the load cell is connected to the inner ring of the bearing, the outer ring of the bearing is connected to the external circuit through the line, and the bearing itself acts as an intermediate conductive Components, so that when the load cell rotates with the component under test, its signal line does not entangle, and the signal can be transmitted to the external control circuit. This kind of structure is simple and ingenious. The whole device is a separate part, which is convenient for disassembly and assembly, and is convenient for the later stage. maintenance and improvement;

(5) The electromagnetic heating roller for the corrugating machine of the present invention, the mounting seat in the pressure monitor is connected to the rotating shaft, the bearing is arranged on the rotating shaft, and a wiring hole is opened in the rotating shaft, and the signal line of the load cell passes through the inner wiring hole and is connected to the bearing The inner ring and the rotating shaft are used as the intermediate connecting shaft to realize the bearing installation and the wiring arrangement of the signal lines;

(6) The electromagnetic heating roller for the corrugating machine of the present invention is equipped with a safety valve connected to the detection hole on the mounting seat of the pressure monitor. When the pressure measuring element fails, the safety of the entire equipment can be guaranteed, and the continuous increase of pressure can be avoided, which is safe and reliable. ;

(7) The electromagnetic heating roller for the corrugating machine of the present invention can be applied in the corrugating machine to heat the upper corrugating roller, the lower corrugating roller and/or the pressure roller, the heating efficiency is high, the speed is fast, the energy utilization rate is high, energy saving and consumption reduction , more importantly, it can ensure the uniformity of the surface temperature of the roller;

(8) The electromagnetic heating method of the corrugating machine of the present invention controls the heating of the electromagnetic heater according to the size of the vapor pressure in the cavity of the roller body, so as to ensure the relative problem of the vapor pressure, and then achieve the balance of the surface temperature of the roller body. The control method is simple and accurate , reliable, able to monitor and control the temperature of the roller surface in real time, to ensure the continuous and efficient operation of the equipment;

(9) The electromagnetic heating method for corrugating machine of the present invention, the vapor pressure setting value in the roller body cavity is 0.8MPa, when this pressure, the roller surface temperature remains at about 175 ℃, is suitable for the production of corrugated paper, and the pressure is also lower, can guarantee production safety.

Description of drawings

Fig. 1 is the structural principle schematic diagram of electromagnetic heating roller for corrugating machine of the present invention;

Fig. 2 is a schematic cross-sectional structure diagram of a pressure monitor in an electromagnetic heating roller for a corrugating machine according to the present invention.

In the figure: 1, roller body; 2, electromagnetic heater; 201, U-shaped magnet; 202, electromagnetic wire; 3, heat insulation pad; 4, fan; 5, pressure monitor; 510, mounting seat; 511, monitoring hole ; 512, shaft end; 513, roll end; 520, bearing seat; 521, external wiring hole; 530, bearing; 540, rotating shaft; 541, internal wiring hole; 550, load cell; 560, safety valve.

detailed description

The present invention will be further described below in conjunction with specific embodiments and accompanying drawings.

Example 1

As shown in Figure 1, the present embodiment is an electromagnetically heated roll for a corrugating machine, which includes a roll body 1 and an electromagnetic heater 2; wherein, the roll body 1 can be an upper corrugating roll, a lower corrugating roll or a pressure roll in a corrugating machine , the upper corrugating roller and the lower corrugating roller are used to squeeze the core paper into a wave shape, and the pressure roller cooperates with the upper corrugating roller to fit the surface paper and the formed core paper; the electromagnetic heater 2 is used for the roller body 1 for heating. In the prior art, the heating structure of the roller body 1 is basically by passing the heated heat-conducting liquid, such as water and heat-conducting oil, through one end of the roller, heating the roller and then passing it out from the other end, and then heating and introducing it into the roller. Recycling is formed. This method has been pointed out in the background technology that most of the heat of the heat-conducting medium in the roll will be taken away due to the evaporation of water in the base paper, while the two ends of the width direction of the base paper will take away less heat, and the temperature of the roll surface at both ends is relatively high. High, resulting in the temperature in the entire width direction of the base paper, hot at both ends, low in the middle, high and low flute phenomenon, uneven heating of corrugated paper, uneven moisture in the entire width direction of the base paper, often resulting in the failure of the base paper to form or the quality of the corrugated board after forming. Less than required. In response to the above problems, the applicant has optimized the structure of the roller body 1 after long-term research and development and practical verification. The roller body 1 has a cavity for encapsulating the heat-conducting liquid, and of course it has a filling port and a release port for the heat-conducting liquid. , not shown in the figure, the cavity is in a relatively closed space. The electromagnetic heater 2 is arranged below the roller body 1, and can heat the roller body 1, and the heat transfer liquid in the roller body 1 is also heated up through heat conduction, and generates steam in the cavity. With this kind of structure, when the steam pressure in the cavity is constant, the steam temperature is relatively constant, which can ensure that the surface temperature of the roll body 1 remains balanced during the working process of the roll body 1, avoiding the above-mentioned high and low flute phenomenon, so as to ensure the base paper in the whole process. Moisture balance in the width direction improves product quality; and this structural design also simplifies the complexity of the roll body and reduces production costs; in addition, the electromagnetic heating method is more energy-saving and environmentally friendly, and the electromagnetic heater 2 is small in size and Compact and fast start-up make heating operation convenient and easy to control.

The electromagnetic heater 2 can adopt a common structural form in the prior art, such as a cake-type electromagnetic heating structure, that is, the coil is spirally wound into a cake shape, but this structure is not only bulky, but more importantly, the magnetic field generated by the energized coil Only half of the magnetic force lines are passed through the roller body 1, and the other half of the magnetic force lines pass through the air to form a loop, so only half of the magnetic field is used, which is not effectively utilized. The magnetic conversion rate is relatively low, the heating effect is poor, and energy waste is serious. Therefore, the present embodiment is improved on this basis. The electromagnetic heater 2 of the present embodiment includes a plurality of U-shaped magnets 201 and electromagnetic wires 202, and the plurality of U-shaped magnets 201 are arranged side by side in a straight line along the axial direction of the roller body 1. above, next to each other; an electromagnetic wire 202 is wound on both ends of the U-shaped magnet 201 by a single-loop winding method to form a coil, that is, the electromagnetic wire 202 starts firing the first coil from one end of a U-shaped magnet 201, Then go to the other end of the U-shaped magnet 201 to continue firing until the two ends of all U-shaped magnets 201 are wound into coils, and the two ends of the electromagnetic wire 202 can be connected to high-frequency current; and the same U-shaped magnet 201 The coils formed by firing the electromagnetic wires 202 at both ends have opposite directions of rotation, and the adjacent ends of two adjacent U-shaped magnets 201 are combined together as an iron core to wind the coils. With this structure, a high-frequency current is passed into the electromagnetic wire 202, and the coil generates a magnetic field. The U-shaped structure of the U-shaped magnet 201 makes the bottom of the U-shaped magnet 201 basically have no magnetic field, and the magnetic induction lines basically pass through the U-shaped magnet 201. Inside, the magnetic induction line above the U-shaped magnet 201 passes through the roller body 1, so that the magnetic radiation is small, the electromagnetic conversion rate is high, and basically converted into heat energy, the conversion rate can reach more than 99%, so the heating speed is also fast and the efficiency is high; multiple The U-shaped magnets 201 are arranged side by side and wound with one electromagnetic wire 202 , the magnetic field changes of each U-shaped magnet 201 are kept synchronous, and no offset occurs, which further improves the magnetic utilization rate and is reasonable in design.

It should be noted that the gap distance between the roller body 1 and the U-shaped magnet 201 is very important. If the distance is large, the magnetic field lines between them need to pass through a section of air, which will lead to a decrease in the magnetic conversion rate; if the distance is small, the roller body will 1. The heat radiation of the pair of U-shaped magnets 201 is relatively large, and the electromagnetic heater 2 will be burned. Therefore, in consideration of this, the inventor has obtained through long-term exploration and practice that the distance between the lower end surface of the roller body 1 and the upper surface of the U-shaped magnet 201 is relatively moderate between 3-5mm, which has little influence on the magnetic conversion rate. And the heat radiation will not burn the electromagnetic heater 2, the present embodiment chooses 4mm. In addition, in order to further improve the heat insulation effect, a heat insulating pad 3 is arranged between the top of the U-shaped magnet 201 and the roller body 1, further reducing the heat transfer of the roller body 1 to the U-shaped magnet 201, and protecting the electromagnetic heater 2; , A fan 4 is arranged at the bottom of the U-shaped magnet 201 to cool it down, and further protect the electromagnetic heater 2 so that it can continue to work stably and improve its service life.

In addition, in this embodiment, the U-shaped magnet 201 uses high-frequency ferrite, and the installation volume is small. The magnet wire 202 uses a high-temperature insulated magnet wire, and the magnet wire 202 is wound on the U-shaped magnet 201 through a coil skeleton made of an insulating oxide resin material. and apply insulating glue to ensure durability and high safety factor.

It should be noted that since steam is used to control the temperature of roll body 1, the pressure of steam is the key to determining the temperature. Traditionally, the temperature measurement of roll body 1 is carried out by measuring the temperature of a certain point on the roll surface. Inaccurate, and for the structural form of this embodiment, the measurement of the roller surface temperature cannot accurately reflect the vapor pressure value, therefore, it is necessary to find a more suitable structural form. Based on the foregoing problems, this embodiment adds a pressure monitor 5. As shown in FIG. 1 and FIG. 510 is installed at the rotation center of the end of the roller body 1 to ensure that the rotation axis of the mounting seat 510 coincides with the rotation axis of the roller body 1. In this embodiment, one end of the mounting seat 510 is provided with a raised roller end 513, through which The roller end 513 installs the mounting seat 510 on the roller body 1, and the other end of the mounting seat 510 is provided with a protruding shaft end 512, and the end surface of the shaft end 512 is provided with a threaded hole; one end of the rotating shaft 540 is provided with a threaded section, and the screw thread The section is threadedly connected with the threaded hole of the shaft end 512, thereby connecting the rotating shaft 540 with the mounting seat 510; the bearing seat 520 is installed with a bearing 530, and the end of the rotating shaft 540 away from the mounting seat 510 is inserted into the inner ring of the bearing 530, thereby realizing the rotating shaft. 540 and the relative rotation between the bearing seat 520. A monitoring hole 511 is set in the mounting base 510, leading to the end face of the receiving roller end 513, and the load cell 550 is fixed on the mounting base 510 and communicated with the monitoring hole 511; the rotating shaft 540 is provided with an internal wiring hole 541, and the internal wiring hole 541 leads to On the surface of the rotating shaft 540 where the bearing 530 is installed, the signal line of the load cell 550 passes through the inner wiring hole 541 and then is connected to the inner ring of the bearing 530; Wiring holes 521 , the lines of the control circuit are connected to the outer ring of the bearing 530 through the outer wiring holes 521 .

The pressure monitor 5 is used to monitor the vapor pressure in the roller body 1. The pressure measuring element 550 can timely and accurately feed back the vapor pressure in the roller body and generate an electrical signal, and transmit the signal to the control circuit, so as to know the temperature of the roller body and control the temperature of the roller body. The start and stop of the electromagnetic heater 2; more importantly, the mounting seat 510 and the bearing seat 520 are connected through the bearing 530, and the signal line of the load cell 550 is connected to the inner ring of the bearing 530, and the outer ring of the bearing 530 is passed through the line To connect the external circuit, the bearing 530 itself is used as an intermediate conductive element, so that the signal line of the load cell 550 is not entangled while the component under test rotates, and the signal can be transmitted to the external control circuit. This structure is simple and ingenious, and the whole The device is a separate part, which is easy to disassemble and assemble, and is convenient for later maintenance and improvement. In this embodiment, three bearings 530 are arranged side by side in the bearing seat 520 , the support is stable, and multiple sets of signal lines can be contacted. In addition, in this implementation, the pressure measuring element 550 adopts a pressure transmitter, which can detect the internal vapor pressure of the roller body 1, and the bearing seat 520 and the rotating shaft 540 are made of plastic material, which is non-conductive and avoids the danger caused by leakage; at the same time, the mounting seat 510 The safety valve 560 is installed, and the safety valve 560 communicates with the monitoring hole 511 in the installation seat 510. When the pressure measuring element 550 fails, the safety of the entire equipment can be guaranteed, and the pressure can be avoided from continuously increasing, which is safe and reliable.

The above-mentioned electromagnetic heating roller for corrugating machine can be applied in a corrugating machine to heat the upper corrugating roller, lower corrugating roller and/or pressure roller of the corrugating machine. In order to illustrate the problem, this embodiment uses The above structural form and the heating method of the corrugator are explained, and the specific steps are as follows:

First, inject a heat-conducting liquid into the cavity of the roller body 1, here water is used, and the added volume is about 1/3 of the volume of the cavity;

Then, the two ends of the electromagnetic wire 202 of the electromagnetic heater 2 are connected to the high-frequency circuit, the pressure monitor 5 is connected to the control circuit, and the pressure value of the load cell 550 is set to 0.8MPa, and the control circuit can control the on-off of the high-frequency circuit; The fan 4 is powered on and works to cool down the electromagnetic heater 2;

Then, the high-frequency circuit is connected, high-frequency current is generated in the electromagnetic wire 202, and an alternating magnetic field is generated in the coil, which heats the roller body 1 and the heat-conducting liquid, generates steam in the cavity, and continues heating. When the steam pressure reaches 0.8MPa , the temperature of the roller surface is about 175°C, at this time, the load cell 550 converts the pressure signal into an electrical signal and transmits it to the control circuit, the control circuit controls the high-frequency circuit to be disconnected, and the electromagnetic heater 2 stops heating; when the vapor pressure is lower than 0.8MPa At this time, the control circuit controls the high-frequency circuit to be switched on, and the electromagnetic heater 2 heats again. Repeat this to ensure that the vapor pressure in the cavity remains relatively stable at about 0.8MPa, so that the temperature of the roller surface is relatively stable, and the corrugated paper can be evenly heated to ensure Moisture balance of the corrugated paper in the entire width direction; here, the overflow pressure of the safety valve 560 is set at 1MPa. The valve 560 is opened to release the pressure to ensure safety.

Using the above operation method, the temperature difference of the roller surface is monitored to be no more than 2°C during the whole production process, which shows that the electromagnetic heating roller can ensure the uniformity of heating, which shows its outstanding effect.

The examples described in the present invention are only to describe the preferred implementation of the present invention, and are not intended to limit the concept and scope of the present invention. Variations and improvements should fall within the protection scope of the present invention.

Claims (10)

1. a kind of Corrugating Machine Electromechanic heating roller, including roll body (1) and electromagnetic heater (2), electromagnetic heater (2) is for roller Body (1) is heated, it is characterised in that：Cavity of the described roll body (1) with encapsulation heat-conducting liquid, electromagnetic heater (2) can Heat-conducting liquid is heated by roll body (1) steam is produced in the cavity of roll body (1).

2. a kind of Corrugating Machine Electromechanic heating roller according to claim 1, it is characterised in that：The electromagnetic heater (2) Including multiple U-shaped magnet (201) and electromagnetic wire (202), multiple U-shaped magnet (201) are arranged side by side along the axis direction of roll body (1) Point-blank；The electromagnetic wire (202) forms line by the two ends that single loop winding mode is wrapped in U-shaped magnet (201) Circle.

3. a kind of Corrugating Machine Electromechanic heating roller according to claim 2, it is characterised in that：Described same U-shaped magnetic The coil that the electromagnetic wire (202) at iron (201) two ends is fired into is oppositely oriented, and the abutting end of two neighboring U-shaped magnet (201) is closed Together as an iron core wound around coil.

4. a kind of Corrugating Machine Electromechanic heating roller according to Claims 2 or 3, it is characterised in that：The U-shaped magnet (201) heat insulating mattress (3) is provided with above, its bottom is provided with fan (4).

5. a kind of Corrugating Machine Electromechanic heating roller according to claim 1 or 2 or 3, it is characterised in that：Also supervised including pressure Control device (5)；The pressure monitor (5) includes mounting seat (510), the bearing block at the pivot of roll body (1) end And load cell (550) (520)；Described bearing block (520) is fixed in frame, and its internal installation shaft holds (530), mounting seat (510) it is connected with bearing block (520) by bearing (530)；Described load cell (550) is arranged in mounting seat (510), peace Monitoring holes (511) one end in dress seat (510) is connected to load cell (550), and the other end is communicated to the cavity of roll body (1)；It is described The holding wire of load cell (550) is connected to the inner ring of bearing (530), and the outer ring of bearing (530) can be by line connection control Circuit.

6. a kind of Corrugating Machine Electromechanic heating roller according to claim 5, it is characterised in that：Described mounting seat (510) One end of connection rotating shaft (540), the inner ring of other end insertion bearing (530) of rotating shaft (540)；In the rotating shaft (540) is provided with Wiring hole (541), the holding wire of load cell (550) is followed by the inner ring of bearing (530) through internal wiring hole (541).

7. a kind of Corrugating Machine Electromechanic heating roller according to claim 5, it is characterised in that：Described mounting seat (510) Upper installation safety valve (560), safety valve (560) is connected with monitoring holes (511) in mounting seat (510).

8. arbitrary application of a kind of Corrugating Machine Electromechanic heating roller in Corrugating Machine in claim 1-7, for Corrugating Machine Upper corrugated roller, lower corrugated roller and/or pressure roll heated.

9. a kind of Corrugating Machine electromagnetic heating method, its operating procedure is：Electromagnetic heater (2) is heated to roll body (1), roll body (1) the heat-conducting liquid in cavity is heated generation steam, when the cavity inner vapor pressure of roll body (1) reaches setting pressure, control electricity Magnetic heater (2) stops heating；By the start and stop for controlling electromagnetic heater (2) to heat, it is ensured that the cavity inner vapor pressure of roll body (1) Stablize relatively.

10. a kind of Corrugating Machine electromagnetic heating method according to claim 9, it is characterised in that：The cavity of the roll body (1) Inner vapor pressure setting value is 0.8MPa.