A high-efficiency roller-shaped electromagnetic control element and its control method

Abstract

This invention discloses a high-efficiency roller-shaped electromagnetic control element and its control method. The element includes a roller-shaped electromagnetic control roll, a single-sided slotted electromagnetic rod, an induction heating coil, a double-sided slotted electromagnetic rod, a heating component, external connection lines, and a temperature sensor. The roller-shaped electromagnetic control roll has an axial through hole at its center for mounting the single-sided slotted electromagnetic rod, the induction heating coil, the double-sided slotted electromagnetic rod, the heating component, and the temperature sensor. One end face of the single-sided slotted electromagnetic rod has a circumferentially uniformly arrayed array of heating component mounting slots, and both end faces of the double-sided slotted electromagnetic rod have circumferentially uniformly arrayed arrays of heating component mounting slots. The induction heating coil, powered by a current loop, excites a spatial magnetic field to heat the heating component. The temperature sensor is mounted in the axial slots on the heating component. This invention can effectively improve the control efficiency of the electromagnetically controlled roller shape.

Description

Technical Field

[0001] This invention relates to the field of metallurgical equipment technology, and in particular to a high-efficiency roller-shaped electromagnetic control element and its control method. Background Technology

[0002] Strip shape is a key indicator for evaluating the quality of sheet and strip products, and its control relies on the strip shape control technology implemented in the strip mill. Roll shape electromagnetic control technology, as a flexible roll shape control technology, can achieve micro-amplitude control of the roll gap shape through built-in roll shape electromagnetic control elements, utilizing the principle of thermal expansion, thereby achieving the strip shape control target. The core of this technology lies in the non-uniform heating and corresponding thermal expansion of the electromagnetically controlled roll and the roll shape electromagnetic control element. Specifically, the inner wall of the electromagnetically controlled roll expands radially inward due to heating, exhibiting an overall radial contraction; the roll shape electromagnetic control element undergoes overall expansion under the action of the core heat source. Therefore, the temperature rise effect of the electromagnetically controlled roll and the roll shape electromagnetic control element will affect the efficiency of roll shape electromagnetic control. Constrained by the time-sensitive nature of strip shape control, roll shape electromagnetic control must achieve high efficiency within a short period.

[0003] Based on the aforementioned technical requirements, the steel manufacturing industry has successively proposed several forms of roller-shaped electromagnetic control elements, including: Patent application CN201210015091.7 proposes a roller-shaped control element based on the principle of electrothermal expansion, which uses electrothermal energy as the expansion source, resulting in low control efficiency; Patent application CN201810170144.X proposes an annular roller-shaped electromagnetic control element with axial slots, where the induction heating zone and the expansion body are located in the same structural area, but the induction heating effect of a single-strand wire is weaker than that of a coil, thus resulting in low control efficiency; Patent application CN201910598123.2 proposes a flat vortex roller-shaped electromagnetic control element, which can directly heat the end of the bulging body and expand the heat into the bulging body. However, due to the poor magnetic concentration effect of the flat vortex coil structure, the control efficiency is low. Patent application CN202110736802.9 proposes a combined annular roller-shaped electromagnetic control element, which has the advantage of multi-point heat transfer. However, there is a difference in stiffness between the two combined elements, and the bulging effect is also different. Moreover, there are differences in the control of multi-point temperature control, and the control method has not yet been proposed. Summary of the Invention

[0004] This invention provides a high-efficiency roller-shaped electromagnetic control element and its control method to solve the technical problem that the existing roller-shaped electromagnetic control elements have low control efficiency and are difficult to adapt to the timeliness requirements of roller shape control.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] On one hand, the present invention provides a high-efficiency roller-shaped electromagnetic control element, which includes: a roller-shaped electromagnetic control roll, a single-sided slotted electromagnetic rod, an induction heating coil, a double-sided slotted electromagnetic rod, a heating component, external connection lines, and a temperature sensor; wherein,

[0007] The center of the roll-shaped electromagnetic control roll has an axial through hole, the axis of the through hole coincides with the axis of the roll, and the single-sided slotted electromagnetic rod, the induction heating coil, the double-sided slotted electromagnetic rod, the heating component, and the temperature sensor are all assembled in the through hole. After assembly, the single-sided slotted electromagnetic rod and the double-sided slotted electromagnetic rod are coaxial with the roll-shaped electromagnetic control roll.

[0008] The single-sided slotted electromagnetic rod has a heating component mounting slot in a uniform circumferential array on one end face, and the double-sided slotted electromagnetic rod has a heating component mounting slot in a uniform circumferential array on both end faces; each heating component mounting slot is equipped with a heating component.

[0009] The external connection line includes a current loop and a temperature sensor detection loop;

[0010] The heating component includes an end heat transfer component and a heating body component assembled together; wherein, the end heat transfer component is inserted into the mounting hole slot of the heating component, and the induction heating coil is wound around the outside of the heating body component. The induction heating coil is electrically connected to the current loop, and under the power supply of the current loop, it excites a spatial magnetic field and realizes the heating of the heating component.

[0011] The heating component is provided with a temperature sensor mounting hole, and the temperature sensor is installed in the temperature sensor mounting hole. The temperature sensor is electrically connected to the temperature sensor detection circuit.

[0012] Furthermore, both the roll-shaped electromagnetic control roll and the heating component are rotary structures;

[0013] Both the single-sided slotted electromagnetic rod and the double-sided slotted electromagnetic rod are rotating structures with slots.

[0014] Furthermore, within the same roll-shaped electromagnetic control roll, the diameters of the heating component mounting slots on the single-sided slotted electromagnetic rod and the double-sided slotted electromagnetic rod are the same, and the layout of the heating component mounting slots on each electromagnetic rod is consistent.

[0015] Furthermore, the arrangement principle of the heating component mounting slots is as follows: a heating component mounting slot is arranged at the center of the end face of the electromagnetic rod as the basic heating zone; then, a ring of heating component mounting slots is arranged at a radius of one-quarter of the electromagnetic rod's distance from the center as the first heating zone; a ring of heating component mounting slots is arranged at a radius of one-half of the electromagnetic rod's distance from the center as the second heating zone; and a ring of heating component mounting slots is arranged at a radius of three-quarters of the electromagnetic rod's distance from the center as the third heating zone; wherein, a heating component mounting slot is provided every 60° in the first heating zone, every 30° in the second heating zone, and every 15° in the third heating zone.

[0016] Furthermore, the diameter of the mounting holes for each heating component is one-seventh of the radius of the electromagnetic rod.

[0017] Furthermore, the depth of the mounting hole groove of the heating component is three-fifths of the length of the end heat transfer component; the mounting hole groove of the heating component and the end heat transfer component are either interference fit or small clearance fit.

[0018] Furthermore, the depth of the temperature sensor mounting hole is half the length of the heating body component, and the size of the temperature sensor mounting hole is the same as the size of the temperature sensor.

[0019] Furthermore, the temperature sensors are arranged in a 120° arithmetic sequence and are sequentially installed in the heating components of the base heating zone, the first heating zone, the second heating zone, and the third heating zone.

[0020] On the other hand, the present invention also provides a control method for the above-mentioned high-efficiency roller-shaped electromagnetic control element, the control method for the high-efficiency roller-shaped electromagnetic control element comprising the following steps:

[0021] Step 1: Determine the control zone and match the induction heating coil to be driven, and test the continuity of the circuit; if the test result shows that the circuit of the induction heating coil is good, then a good signal is fed back to the equipment, and the roller electromagnetic control can be performed; if the test result shows that the circuit is open, then the circuit and the induction heating coil need to be maintained, and a shutdown signal is fed back.

[0022] Step 2: Preset the total current value and divide the power supply into n levels, and give the power increase time of s seconds; every s / n seconds, increase the current value increment of one level.

[0023] Step 3: Detect the temperature values ​​of the temperature sensors corresponding to the basic heating zone, the first heating zone, the second heating zone, and the third heating zone every s / n seconds;

[0024] Step 4: Compare the temperature readings from each temperature sensor to determine the temperature rise effect of the roller-shaped electromagnetic control element;

[0025] Step 5: If T 7-0 >T 7-1 >T 7-2 >T 7-3 Then, continuous power supply is maintained; among which, T 7-0 T represents the temperature reading from the temperature sensor corresponding to the basic heating zone. 7-1 T represents the temperature reading from the temperature sensor corresponding to the first heating zone. 7-2 T represents the temperature reading from the temperature sensor corresponding to the second heating zone. 7-3 This indicates the temperature reading from the temperature sensor corresponding to the third heating zone.

[0026] Step Six: If T 7-0 -T 7-1 <10℃ and T 7-1 >T 7-2 >T 7-3 This will cause the system to enter a slow temperature rise phase, reducing the current value to two-thirds of its original value;

[0027] Step 7: If, based on step 6, T 7-1 -T 7-2 <10℃ and T 7-2 >T 7-3 This will cause the system to enter a quasi-steady state, reducing the current value to one-third of its original value;

[0028] Step 8: If, based on step 7, T 7-2 -T 7-3 If the temperature is less than 10℃, maintain the current value from step seven and change the continuous power supply to the induction heating coil to an intermittent power supply.

[0029] Furthermore, the control method for the high-efficiency roller-shaped electromagnetic control element also includes circumferential temperature detection error processing; the process of circumferential temperature detection error processing includes:

[0030] If the temperature difference detected simultaneously by all temperature sensors in the same heating zone is greater than 10℃, it is determined that a circumferential temperature detection error has occurred in a single-layer heating zone. In this case, take the layer i where the circumferential temperature detection error exists and calculate ΔT. i1 =T 7-i-1 -T 7-i-2 ΔT i2 =T 7-i-1 -T 7-i-3 and ΔT i3 =T 7-i-2 -T 7-i-3 And calculate ΔTi-max =max(|ΔT) i1 |、|ΔT i2 |、|ΔT i3 |), thus obtaining ΔT i-max The radial group m containing the value, m∈[1,3]; discard the temperature sensor detection value of the i-th layer of radial group m, and obtain the temperature value of the discarded term by the difference of the remaining two terms; then use the value obtained by the difference to solve for the mean, and finally obtain the temperature of the heating zone of this layer; where T 7-i-j This represents the temperature detection value of the j-th temperature sensor corresponding to the i-th heating zone, where j = 1, 2, 3; when i = 0, it represents the temperature detection value of the temperature sensor corresponding to the basic heating zone.

[0031] If circumferential temperature detection errors occur in multiple layers, then circuit testing and sensor signal testing should be performed.

[0032] The beneficial effects of the technical solution provided by this invention include at least the following:

[0033] 1. The single-sided slotted electromagnetic rod structure and double-sided slotted electromagnetic rod structure of the high-efficiency roller-shaped electromagnetic control element provided by this invention can provide an efficient path for multi-zone, multi-point electromagnetic rod temperature field control. Combined with the high-efficiency control element control method provided by this invention, the electromagnetic control element can achieve a more rapid temperature rise, and the electromagnetic rod temperature field with the target temperature rise effect can be obtained quickly in a short time, resulting in a significant improvement in efficiency compared to the prior art;

[0034] 2. The heating method of the heating component used in this invention has a stronger temperature rise capability than induction heating of a single-strand wire;

[0035] 3. This invention employs a longitudinal magnetic flux configuration, which has a stronger magnetic focusing effect;

[0036] 4. Except for the heating element slots, the electromagnetic rod used in this invention is a solid structure with high rigidity.

[0037] 5. The high-efficiency roller-shaped electromagnetic control element and its control method provided by the present invention are universal and applicable to various structures of electromagnetically controlled rolls. The high-efficiency roller-shaped electromagnetic control element of the present invention can be directly installed without modifying the existing electromagnetically controlled rolls, effectively improving the control efficiency of the electromagnetically controlled roll shape. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of the overall structure of the high-efficiency roller-shaped electromagnetic control element provided in an embodiment of the present invention;

[0040] Figure 2 This is a diagram showing the distribution of mounting holes and slots for the heating components on the electromagnetic rod provided in an embodiment of the present invention.

[0041] Figure 3 This is a partially enlarged schematic diagram of the high-efficiency roller-shaped electromagnetic control element provided in an embodiment of the present invention;

[0042] Figure 4 This is a structural diagram of a heating component provided in an embodiment of the present invention;

[0043] Figure 5 This is a structural diagram of another form of heating component provided in an embodiment of the present invention;

[0044] Figure 6 This is a schematic diagram of the temperature sensor installation provided in an embodiment of the present invention;

[0045] Figure 7 This is a temperature sensor installation layout diagram provided in an embodiment of the present invention.

[0046] Explanation of reference numerals in the attached figures:

[0047] 1. Roller-shaped electromagnetic control roll; 2. Single-sided slotted electromagnetic rod; 3. Induction heating coil;

[0048] 4. Double-sided slotted electromagnetic rod; 5. Heating component; 6. External connection wiring; 5-1. End heat transfer component

[0049] 5-2. Main heating component; 7-0. Temperature sensor installed on the heating component of the basic heating zone;

[0050] 7-1. Temperature sensors installed on the heating components of the first heating zone;

[0051] 7-2. Temperature sensors installed on the heating components of the second heating zone;

[0052] 7-3. Temperature sensors installed on the heating components of the third-ring heating zone;

[0053] 7-1-1. The first temperature sensor installed on the heating component of the first ring heating zone;

[0054] 7-1-2. The second temperature sensor installed on the heating component of the first heating zone;

[0055] 7-1-3. The third temperature sensor installed on the heating component of the first heating zone;

[0056] 7-2-1. The first temperature sensor installed on the heating component of the second heating zone;

[0057] 7-2-2, The second temperature sensor installed on the heating component of the second heating zone;

[0058] 7-2-3. The third temperature sensor installed on the heating component of the second heating zone;

[0059] 7-3-1. The first temperature sensor installed on the heating component of the third ring heating zone;

[0060] 7-3-2. The second temperature sensor installed on the heating component of the third heating zone;

[0061] 7-3-3, The third temperature sensor installed on the heating component of the third ring heating zone. Detailed Implementation

[0062] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0063] The structure of the electromagnetic rod in an electromagnetically controlled roll not only determines the roll's expansion capability but also affects its response rate. Addressing the issues of slow expansion response and difficulty in meeting the time-sensitive requirements of roll shape control using traditional electromagnetic rods, this embodiment provides a high-efficiency electromagnetic control element for roll shape control and, based on the structural characteristics of this element, presents a related control method. For example... Figure 1 As shown, the high-efficiency roller-shaped electromagnetic control element includes: a roller-shaped electromagnetic control roll 1, a single-sided slotted electromagnetic rod 2, an induction heating coil 3, a double-sided slotted electromagnetic rod 4, a heating component 5, an external connection line 6, and a temperature sensor. The roller-shaped electromagnetic control roll 1 and the heating component 5 are both rotating structures; the single-sided slotted electromagnetic rod 2 and the double-sided slotted electromagnetic rod 4 are both rotating structures with slots.

[0064] The center of the roll-shaped electromagnetic control roll 1 has an axial through hole, the axis of which coincides with the axis of the roll. It is used to assemble the single-sided slotted electromagnetic rod 2, the induction heating coil 3, the double-sided slotted electromagnetic rod 4, the heating component 5, and other components. After assembly, the single-sided slotted electromagnetic rod 2 and the double-sided slotted electromagnetic rod 4 must be coaxial with the roll-shaped electromagnetic control roll 1 to ensure the circumferential uniformity of the expansion.

[0065] Whether it is the single-sided slotted electromagnetic rod 2 or the double-sided slotted electromagnetic rod 4, the slots on their end faces serve as mounting positions for the heating component 5. Figure 3As shown. The single-sided slotted electromagnetic rod 2 has a circumferentially uniform array of heating component mounting slots on only one end face, while the double-sided slotted electromagnetic rod 4 has a circumferentially uniform array of heating component mounting slots on both end faces; each heating component mounting slot is fitted with one heating component 5.

[0066] like Figure 2 As shown, within the same roll-shaped electromagnetic control roll, the diameter of the heating component mounting slots of each electromagnetic rod must be the same, and the slot layout must correspond one-to-one to facilitate the installation and fitting of the heating component 5. Further, the arrangement principle of the heating component mounting slots is as follows: one heating component mounting slot is arranged at the center of the electromagnetic rod end face, serving as the basic heating zone, designated as zone 0; subsequently, a ring of heating component mounting slots is arranged at a radius of one-quarter from the center of the electromagnetic rod, serving as the first heating zone, designated as zone 1; a ring of heating component mounting slots is arranged at a radius of one-half from the center of the electromagnetic rod, serving as the second heating zone, designated as zone 2; and a ring of heating component mounting slots is arranged at a radius of three-quarters from the center of the electromagnetic rod, serving as the third heating zone, designated as zone 3. The diameter of each heating component mounting slot is one-seventh of the electromagnetic rod radius R. Specifically, in this embodiment, the electromagnetic rod radius is 50 mm. A single slot is placed at the center of the end face as the basic heating zone, designated as zone 0. A first heating zone, designated as zone 1, is then placed 12.5 mm from the axis of the electromagnetic rod. A second heating zone, designated as zone 2, is placed 25 mm from the axis of the electromagnetic rod. A third heating zone, designated as zone 3, is placed 37.5 mm from the axis of the electromagnetic rod. Within each heating zone, a slot is placed every 60° in the first ring, every 30° in the second ring, and every 15° in the third ring. The diameter of each slot is 7 mm.

[0067] The external connection line 6 includes a current loop and a temperature sensor detection loop.

[0068] The heating component 5 includes an end heat transfer component 5-1 and a heating body component 5-2 assembled together; the heating component 5 includes two structural forms, one of which is as follows: Figure 4 As shown, the end heat transfer component 5-1 has an axially protruding core structure, and the heating body component 5-2 has an axially recessed core structure. The dimensions of the two structures are matched, allowing for installation and mating. Another example is... Figure 5As shown, the end heat transfer component 5-1 has an axially recessed core structure, and the heating body component 5-2 has an axially protruding core structure. The dimensions of the two structures are matched and can be installed together. The end heat transfer component 5-1 is made of a metal material with high thermal conductivity and high electrical conductivity, such as brass or copper; the heating body component 5-2 is made of a metal material with high resistivity and high strength, such as forged steel or cast iron. During installation, the end heat transfer component 5-1 is inserted into the mounting hole of the heating component. The induction heating coil 3 is wound around the outside of the heating body component 5-2. The induction heating coil 3 is electrically connected to the current loop, and under the power supply of the current loop, it excites a spatial magnetic field to heat the heating component 5. The depth of the mounting hole of the heating component needs to reach three-fifths of the length of the end heat transfer component 5-1 to ensure good heat exchange between the heating component 5 and the mounting hole. The mounting hole groove of the heating component and the end heat transfer component 5-1 are preferably fitted with an interference fit or a small clearance fit to ensure good contact between the heat exchange surfaces of the two components.

[0069] Specifically, in this embodiment, the heating component 5 adopts the following... Figure 4 The structure shown has the following characteristics: the heating element 5 has a total length of 30mm, the end heat transfer element 5-1 has a length of 5mm, and the main heating element 5-2 has a length of 20mm. The end heat transfer element 5-1 is made of brass, a metal material with high thermal and electrical conductivity; the main heating element 5-2 is made of forged steel, a metal material with high resistivity and high strength. The mounting hole depth for the heating element is 3mm. An interference fit or a small clearance fit is used between the hole / slot and the end structure of the heating element.

[0070] Furthermore, the heating component is provided with a temperature sensor mounting slot, in which the temperature sensor is installed. The temperature sensor is electrically connected to the temperature sensor detection circuit and is used to detect the temperature of the corresponding area. The depth of the temperature sensor mounting slot is half the length of the heating main component, and its dimensions are the same as those of the temperature sensor. Due to the high degree of axisymmetry of the electromagnetic control roll and its related control elements, the temperature sensors are installed in a 120° arithmetic array within the heating component 5 from the basic heating zone to the third heating zone.

[0071] Based on the above, this embodiment also provides a control method for the aforementioned high-efficiency roller-shaped electromagnetic control element, the control method for the high-efficiency roller-shaped electromagnetic control element comprising the following steps:

[0072] Step 1: Determine the control zone and match the induction heating coil to be driven, and test the continuity of the circuit; if the test result shows that the circuit of the induction heating coil is good, then a good signal is fed back to the equipment, and the roller electromagnetic control can be performed; if the test result shows that the circuit is open, then the circuit and the induction heating coil need to be maintained, and a shutdown signal is fed back.

[0073] Step 2: Preset the total current value and divide the power supply into n levels, and give the power increase duration of s seconds; every s / n seconds, increase the current value by one level; in this embodiment, the preset total current value is 93A, and the power supply is divided into 2 levels, with a power increase duration of 10 seconds.

[0074] Step 3: Detect the temperature values ​​of the temperature sensors corresponding to the basic heating zone, the first heating zone, the second heating zone, and the third heating zone every s / n seconds; that is, detect the temperature values ​​(T) of temperature sensors 7-0 to 7-3. 7-0 、T 7-1 、T 7-2 、T 7-3 );

[0075] Step 4: Measure the temperature reading T 7-0 、T 7-1 、T 7-2 、T 7-3 A comparison was made to determine the temperature rise effect of the roller-shaped electromagnetic control element;

[0076] Step 5: If T 7-0 >T 7-1 >T 7-2 >T 7-3 If the electromagnetically controlled roll is still in the temperature rise stage, it can maintain continuous power supply; among which, T 7-0 T represents the temperature reading from the temperature sensor corresponding to the basic heating zone. 7-1 T represents the temperature reading from the temperature sensor corresponding to the first heating zone. 7-2 T represents the temperature reading from the temperature sensor corresponding to the second heating zone. 7-3 This represents the temperature detection value of the temperature sensor corresponding to the third heating zone; specifically, in this embodiment, at 60 seconds, T... 7-0 、T 7-1 、T 7-2 、T 7-3 The temperatures were 237℃, 203℃, 177℃, and 142℃, respectively. The temperature readings showed a T... 7-0 >T 7-1 >T 7-2 >T 7-3 Due to the relationship, the electromagnetically controlled rolls are still in the temperature rise stage and can maintain continuous power supply;

[0077] Step Six: If T 7-0 -T 7-1 <10℃ and T 7-1 >T 7-2 >T 7-3 The first heating zone then has a relatively high temperature, allowing the system to enter a slow temperature rise phase and reduce the current value to two-thirds of its original value; in this embodiment, at 85 seconds, T 7-0 、T 7-1 、T 7-2 、T 7-3 The temperatures were 271℃, 268℃, 244℃, and 221℃, respectively. The temperature readings showed a T... 7-0 -T 7-1 <10℃ and T 7-1 >T 7-2 >T 7-3 Due to the relationship, the first heating zone has a relatively high temperature, which allows the system to enter a slow temperature rise phase and reduce the current value to 62A.

[0078] Step 7: If, based on step 6, T 7-1 -T 7-2 <10℃ and T 7-2 >T 7-3 The second heating zone then has a relatively high temperature, allowing the system to enter a quasi-steady-state phase and reduce the current value to one-third of its original value. In this embodiment, at time 110 seconds, T... 7-0 、T 7-1 、T 7-2 、T 7-3 The temperatures were 283℃, 281℃, 275℃, and 256℃, respectively. The temperature readings show a T... 7-1 -T 7-2 <10℃ and T 7-2 >T 7-3 Due to the relationship, the second heating zone has a relatively high temperature, which allows the system to enter a quasi-steady state and reduce the current value to 31A.

[0079] Step 8: If, based on step 7, T 7-2 -T 7-3 If the temperature is below 10℃, the system enters a steady-state phase, maintaining the current value from step seven, and changing the continuous power supply to the induction heating coil to intermittent power supply; specifically, in this embodiment, at 150 seconds, T 7-0 、T 7-1 、T 7-2 、T 7-3 The temperatures were 287℃, 286℃, 280℃, and 276℃, respectively. The temperature sensor readings showed a T... 7-2 -T 7-3At temperatures below 10℃, the system enters a steady-state phase, maintaining a current value of 31A, and the continuous power supply to the induction heating coil 3 is changed to intermittent power supply.

[0080] Furthermore, the control method for the high-efficiency roller-shaped electromagnetic control element also includes circumferential temperature detection error processing; the process of circumferential temperature detection error processing includes:

[0081] (1) If the temperature difference detected by each temperature sensor in the same heating zone at the same time is greater than 10℃, that is, if T 7-1-1 To T 7-1-3 , or T 7-2-1 To T 7-2-3 Or T 7-2-1 To T 7-2-3 If the temperature difference detected by the temperature sensors simultaneously is greater than 10℃, it can be determined that there is a circumferential temperature detection error in the single-layer heating zone. In this case, take the layer i where the circumferential temperature detection error exists and calculate ΔT. i1 =T 7-i-1 -T 7-i-2 ΔT i2 =T 7-i-1 -T 7-i-3 and ΔT i3 =T 7-i-2 -T 7-i-3 And calculate ΔT i-max =max(|ΔT) i1 |、|ΔT i2 |、|ΔT i3 |), thus obtaining ΔT i-max The radial group m containing the value, m∈[1,3]; discard the temperature sensor detection value of the i-th layer of radial group m, and obtain the temperature value of the discarded term by the difference of the remaining two terms; then use the value obtained by the difference to solve for the mean, and finally obtain the temperature of the heating zone of this layer; where T 7-i-j This represents the temperature detection value of the j-th temperature sensor corresponding to the i-th heating zone, where j = 1, 2, 3; when i = 0, it represents the temperature detection value of the temperature sensor corresponding to the basic heating zone.

[0082] (2) If circumferential temperature detection errors occur in multiple layers, the system needs to be tested, including testing the power supply line of the induction heating coil 3 and the sensor signal.

[0083] In summary, this embodiment provides a high-efficiency roller-shaped electromagnetic control element and its control method. Compared with existing roller-shaped electromagnetic control elements, the single-sided slotted electromagnetic rod structure and the double-sided slotted electromagnetic rod structure of the high-efficiency roller-shaped electromagnetic control element in this embodiment can provide an efficient path for multi-zone, multi-point electromagnetic rod temperature field control. Combined with the high-efficiency control element and control method provided in this embodiment, the electromagnetic control element can achieve a more rapid temperature rise, and the electromagnetic rod temperature field with the target temperature rise effect can be obtained quickly in a short time. Compared with the prior art, the efficiency is significantly improved; and it is applicable to electromagnetic control rolls with various structures.

[0084] Furthermore, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. The terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0085] Finally, it should be noted that the above description represents a preferred embodiment of the present invention. It should be pointed out that although preferred embodiments have been described, those skilled in the art, once they understand the basic inventive concept of the present invention, can make various improvements and modifications without departing from the principles described herein. These improvements and modifications should also be considered within the scope of protection of the present invention. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the embodiments of the present invention.

Claims

1. A high-efficiency roller-shaped electromagnetic control element, characterized in that, The high-efficiency roller-shaped electromagnetic control element includes: a roller-shaped electromagnetic control roll, a single-sided slotted electromagnetic rod, an induction heating coil, a double-sided slotted electromagnetic rod, a heating component, external connection lines, and a temperature sensor; wherein... The center of the roll-shaped electromagnetic control roll has an axial through hole, the axis of the through hole coincides with the axis of the roll, and the single-sided slotted electromagnetic rod, the induction heating coil, the double-sided slotted electromagnetic rod, the heating component, and the temperature sensor are all assembled in the through hole. After assembly, the single-sided slotted electromagnetic rod and the double-sided slotted electromagnetic rod are coaxial with the roll-shaped electromagnetic control roll. The single-sided slotted electromagnetic rod has a heating component mounting slot in a uniform circumferential array on one end face, and the double-sided slotted electromagnetic rod has a heating component mounting slot in a uniform circumferential array on both end faces; each heating component mounting slot is equipped with a heating component. The external connection line includes a current loop and a temperature sensor detection loop; The heating component includes an end heat transfer component and a heating body component assembled together; wherein, the end heat transfer component is inserted into the mounting hole slot of the heating component, and the induction heating coil is wound around the outside of the heating body component. The induction heating coil is electrically connected to the current loop, and under the power supply of the current loop, it excites a spatial magnetic field and realizes the heating of the heating component. The heating component is provided with a temperature sensor mounting hole, and the temperature sensor is installed in the temperature sensor mounting hole. The temperature sensor is electrically connected to the temperature sensor detection circuit.

2. The high-efficiency roller-shaped electromagnetic control element as described in claim 1, characterized in that, Both the roll-shaped electromagnetic control roll and the heating component are rotating structures. Both the single-sided slotted electromagnetic rod and the double-sided slotted electromagnetic rod are rotating structures with slots.

3. The high-efficiency roller-shaped electromagnetic control element as described in claim 1, characterized in that, Within the same roll-shaped electromagnetic control roll, the diameters of the heating component mounting holes on the single-sided slotted electromagnetic rod and the double-sided slotted electromagnetic rod are the same, and the layout of the heating component mounting holes on each electromagnetic rod is consistent.

4. The high-efficiency roller-shaped electromagnetic control element as described in claim 3, characterized in that, The arrangement principle of the heating component mounting slots is as follows: a heating component mounting slot is arranged at the center of the end face of the electromagnetic rod as the basic heating zone; then, a ring of heating component mounting slots is arranged at a radius of one-quarter of the electromagnetic rod's distance from the center as the first heating zone; a ring of heating component mounting slots is arranged at a radius of one-half of the electromagnetic rod's distance from the center as the second heating zone; and a ring of heating component mounting slots is arranged at a radius of three-quarters of the electromagnetic rod's distance from the center as the third heating zone. Specifically, a heating component mounting slot is provided every 60° in the first heating zone, every 30° in the second heating zone, and every 15° in the third heating zone.

5. The high-efficiency roller-shaped electromagnetic control element as described in claim 1, characterized in that, The diameter of the mounting holes for each heating component is one-seventh of the radius of the electromagnetic rod.

6. The high-efficiency roller-shaped electromagnetic control element as described in claim 5, characterized in that, The depth of the mounting hole groove for the heating component is three-fifths of the length of the end heat transfer component; The mounting holes of the heating component and the end heat transfer component are either interference-fitted or have a small clearance fit.

7. The high-efficiency roller-shaped electromagnetic control element as described in claim 1, characterized in that, The depth of the temperature sensor mounting hole is half the length of the heating body component, and the size of the temperature sensor mounting hole is the same as the size of the temperature sensor.

8. The high-efficiency roller-shaped electromagnetic control element as described in claim 4, characterized in that, The temperature sensors are arranged in a 120° arithmetic sequence and are installed sequentially in the heating components of the base heating zone, the first heating zone, the second heating zone, and the third heating zone.

9. A control method for a high-efficiency roller-shaped electromagnetic control element as described in claim 8, characterized in that, The control method for the high-efficiency roller-shaped electromagnetic control element includes: Step 1: Determine the control zone and match the induction heating coil to be driven, and test the continuity of the circuit; if the test result shows that the circuit of the induction heating coil is good, then a good signal is fed back to the equipment, and the roller electromagnetic control can be performed; if the test result shows that the circuit is open, then the circuit and the induction heating coil need to be maintained, and a shutdown signal is fed back. Step 2: Preset the total current value and divide the power supply into n levels, and give the power increase time of s seconds; every s / n seconds, increase the current value increment of one level. Step 3: Detect the temperature values ​​of the temperature sensors corresponding to the basic heating zone, the first heating zone, the second heating zone, and the third heating zone every s / n seconds; Step 4: Compare the temperature readings from each temperature sensor to determine the temperature rise effect of the roller-shaped electromagnetic control element; Step 5: If T 7-0 >T 7-1 >T 7-2 >T 7-3 Then, continuous power supply is maintained; among which, T 7-0 T represents the temperature reading from the temperature sensor corresponding to the basic heating zone. 7-1 T represents the temperature reading from the temperature sensor corresponding to the first heating zone. 7-2 T represents the temperature reading from the temperature sensor corresponding to the second heating zone. 7-3 This indicates the temperature reading from the temperature sensor corresponding to the third heating zone. Step Six: If T 7-0 -T 7-1 <10℃ and T 7-1 >T 7-2 >T 7-3 This will cause the system to enter a slow temperature rise phase, reducing the current value to two-thirds of its original value; Step 7: If, based on step 6, T 7-1 -T 7-2 <10℃ and T 7-2 >T 7-3 This will cause the system to enter a quasi-steady state, reducing the current value to one-third of its original value; Step 8: If, based on step 7, T 7-2 -T 7-3 If the temperature is less than 10℃, maintain the current value from step seven and change the continuous power supply to the induction heating coil to an intermittent power supply.

10. The control method for the high-efficiency roller-shaped electromagnetic control element as described in claim 9, characterized in that, The control method for the high-efficiency roller-shaped electromagnetic control element also includes circumferential temperature detection error processing. The process of processing circumferential temperature detection errors includes: If the temperature difference detected simultaneously by all temperature sensors in the same heating zone is greater than 10℃, it is determined that a circumferential temperature detection error has occurred in a single-layer heating zone. In this case, take the layer i where the circumferential temperature detection error exists and calculate ΔT. i1 =T 7-i-1 -T 7-i-2 ΔT i2 =T 7-i-1 -T 7-i-3 and ΔT i3 =T 7-i-2 -T 7-i-3 And calculate ΔT i-max =max(|ΔT) i1 |、|ΔT i2 |、|ΔT i3 |), thus obtaining ΔT i-max The radial group m containing the value, m∈[1,3]; discard the temperature sensor detection value of the i-th layer of radial group m, and obtain the temperature value of the discarded term by the difference of the remaining two terms; then use the value obtained by the difference to solve for the mean, and finally obtain the temperature of the heating zone of this layer; where T 7-i-j This represents the temperature detection value of the j-th temperature sensor corresponding to the i-th heating zone, where j = 1, 2, 3; when i = 0, it represents the temperature detection value of the temperature sensor corresponding to the basic heating zone. If circumferential temperature detection errors occur in multiple layers, then circuit testing and sensor signal testing should be performed.

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