Method for reducing the hardness of magnesium oxide crystals used as filling materials for electric heating elements and related devices

Abstract

The embodiments of the present application relate to the technical field of magnesium oxide processing, and provide a method for reducing the hardness of magnesium oxide crystals used as filling materials for electric heating elements and related devices, the method comprising: performing pneumatic screening on a first magnesium oxide crystal group to obtain a second magnesium oxide crystal group; heating the second magnesium oxide crystal group; transmitting a first sample magnesium oxide crystal group in the second magnesium oxide crystal group at a preset temperature value to a cooling device for rapid cooling using a first rapid cooling control parameter to obtain a target magnesium oxide crystal group; obtaining a first image set of the first sample magnesium oxide crystal group during pneumatic transmission; determining rapid cooling parameter adjustment information based on the first image set; obtaining a second rapid cooling control parameter based on the rapid cooling parameter adjustment information; using the second rapid cooling control parameter to control the cooling device to rapidly cool the second sample magnesium oxide crystal group to obtain magnesium oxide crystals used as filling materials for electric heating elements, thereby improving the accuracy of reducing the hardness of magnesium oxide crystals.

Description

Technical Field

[0001] The present application relates to the technical field of magnesium oxide processing, and in particular to a method for reducing the hardness of magnesium oxide crystals used as filling materials for electric heating elements and a related device. Background Art

[0002] Lightly burned magnesium oxide is a very important basic magnesium raw material, and the current demand for magnesium oxide is also increasing. As the demand for magnesium oxide series products gradually changes from low quality to high quality, the demand for the hardness of magnesium oxide crystals when using magnesium oxide particles for applications is also gradually increasing. Due to the high hardness of magnesium oxide crystals, when magnesium oxide is used, its hardness needs to be processed to reduce its hardness so that the magnesium oxide crystals can be better formed during stirring and filling, for example, when using magnesium oxide particles for filling and forming of electric heating elements.

[0003] In the existing scheme, the scheme for reducing the hardness of magnesium oxide crystals is usually to directly heat the magnesium oxide particles and then cool them to obtain magnesium oxide crystals with reduced hardness, which reduces the accuracy and causes the obtained magnesium oxide crystals to have poor effect during molding. Summary of the invention

[0004] The embodiments of the present application provide a method and a related device for reducing the hardness of magnesium oxide crystals used as filling materials for electric heating elements. The method can rapidly cool the magnesium oxide crystals according to initial cooling parameters, and adjust the initial cooling parameters according to feedback such as the hardness of the magnesium oxide crystals obtained by rapid cooling. Finally, rapid cooling is performed using the adjusted cooling parameters, thereby improving the accuracy of reducing the hardness of the magnesium oxide crystals and further improving the effect of the magnesium oxide crystals during molding.

[0005] A first aspect of an embodiment of the present application provides a method for reducing the hardness of magnesium oxide crystals used as a filling material for an electric heating element, the method comprising:

[0006] Performing wind screening on the first magnesium oxide crystal group obtained by firing to obtain a second magnesium oxide crystal group;

[0007] The second magnesium oxide crystal group is transferred to a high-temperature calcining furnace and heated to a preset temperature value, and the high-temperature calcining furnace is filled with nitrogen and then heated when heating the second magnesium oxide crystal group;

[0008] The first sample magnesium oxide crystal group in the second magnesium oxide crystal group at the preset temperature value is transferred to a cooling device for rapid cooling using a first rapid cooling control parameter to obtain a target magnesium oxide crystal group;

[0009] acquiring a first set of images of a first sample magnesium oxide crystal population being pneumatically conveyed through a pneumatic conveying device;

[0010] determining quenching parameter adjustment information according to the first image set;

[0011] Adjust the first quenching control parameter according to the quenching parameter adjustment information to obtain a second quenching control parameter;

[0012] The cooling device is controlled by the second rapid cooling control parameter to rapidly cool the second sample magnesium oxide crystal group to obtain magnesium oxide crystals for electric heating element filling material.

[0013] In this example, a second magnesium oxide crystal group can be obtained by performing pneumatic screening on the first magnesium oxide crystal group obtained by firing, and the second magnesium oxide crystal group is transferred to a high-temperature calcining furnace and heated to a preset temperature value, so as to further transfer the first sample magnesium oxide crystal group in the second magnesium oxide crystal group at the preset temperature value to a cooling device for rapid cooling using a first rapid cooling control parameter, so as to obtain a first image set when the first sample magnesium oxide crystal group is pneumatically transmitted through a pneumatic transmission device, and rapid cooling parameter adjustment information is determined according to the first image set, so that the first rapid cooling control parameter can be adjusted according to the rapid cooling parameter adjustment information to obtain a second rapid cooling control parameter, and then the second rapid cooling control parameter can be used to control the cooling device to rapidly cool the second sample magnesium oxide crystal group, and the magnesium oxide crystals are rapidly cooled by the initial cooling parameters, and the initial cooling parameters are adjusted according to feedback such as the hardness of the magnesium oxide crystals obtained by rapid cooling, and finally the adjusted cooling parameters are used for rapid cooling, thereby improving the accuracy of reducing the hardness of the magnesium oxide crystals, and thereby improving the effect of the magnesium oxide crystals when forming.

[0014] A second aspect of an embodiment of the present application provides a device for reducing the hardness of magnesium oxide crystals used as a filling material for an electric heating element, the device comprising:

[0015] A first processing unit is used to perform wind screening on the first magnesium oxide crystal group obtained by firing to obtain a second magnesium oxide crystal group;

[0016] A second processing unit is used to transfer the second magnesium oxide crystal group to a high-temperature calcining furnace and heat it to a preset temperature value, and the high-temperature calcining furnace is filled with nitrogen and then heated when heating the second magnesium oxide crystal group;

[0017] A third processing unit is used to transfer the first sample magnesium oxide crystal group in the second magnesium oxide crystal group at a preset temperature value to a cooling device for rapid cooling using a first rapid cooling control parameter to obtain a target magnesium oxide crystal group;

[0018] A first acquisition unit is used to acquire a first image set when a first sample magnesium oxide crystal group is pneumatically transported through a pneumatic transport device;

[0019] A first determining unit, configured to determine quenching parameter adjustment information according to the first image set;

[0020] a fourth processing unit, configured to adjust the first quenching control parameter according to the quenching parameter adjustment information to obtain a second quenching control parameter;

[0021] The fifth processing unit is used to control the cooling device to rapidly cool the second sample magnesium oxide crystal group by using the second rapid cooling control parameter to obtain magnesium oxide crystals for electric heating element filling material.

[0022] A third aspect of an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for electronic data exchange, wherein the computer program enables a computer to execute part or all of the steps described in the first aspect of the embodiment of the present application.

[0023] A fourth aspect of the embodiments of the present application provides a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to execute some or all of the steps described in the first aspect of the embodiments of the present application. The computer program product may be a software installation package. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A structural schematic diagram of a hardness reduction system for magnesium oxide crystals used as a filling material for an electric heating element is provided for an embodiment of the present application;

[0026] Figure 2 A schematic flow chart of a method for reducing the hardness of magnesium oxide crystals used as a filling material for an electric heating element is provided for an embodiment of the present application;

[0027] Figure 3 A structural schematic diagram of a device for reducing the hardness of magnesium oxide crystals used as a filling material for an electric heating element is provided for an embodiment of the present application.

[0028] In the figure,

[0029] 101. First processing unit; 102. Second processing unit; 103. Third processing unit; 104. First acquisition unit; 105. First determination unit; 106. Fourth processing unit; 107. Fifth processing unit; 210. High-temperature calcining furnace; 220. Cooling device; 230. Pneumatic transmission device. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0032] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0033] In order to better understand the hardness reduction method of magnesium oxide crystals for electric heating element filling materials provided in the embodiment of the present application, the following first briefly introduces the scenario of the hardness reduction method of magnesium oxide crystals for electric heating element filling materials. When the insulating filling material is used inside the electric heating element, the hardness of the magnesium oxide crystals used is relatively high and cannot be stirred and mixed better, which will bring challenges to the insulation filling inside the electric heating element. In view of the above problems, the embodiment of the present application provides a method for reducing the hardness of magnesium oxide crystals for electric heating element filling materials, by heating magnesium oxide at high temperature, so that the particle movement inside the magnesium oxide crystal is intensified, the atomic distance is increased, and then rapid cooling is used to make the outside of the magnesium oxide crystal shrink rapidly, while the internal shrinkage is relatively lagging, so that huge internal stress is generated through this uneven shrinkage, thereby causing the magnesium oxide crystal to break, and at the same time, the magnesium oxide crystal is quenched by the initial cooling parameters, and the initial cooling parameters are adjusted according to the feedback of the hardness of the magnesium oxide crystal obtained by the quenching, and finally the adjusted cooling parameters are used for quenching, which improves the accuracy of reducing the hardness of the magnesium oxide crystal, thereby improving the effect of the magnesium oxide crystal when forming.

[0034] The embodiment of the present application aims to solve the problem of high hardness of magnesium oxide crystals used as filling material when performing insulation filling inside an electric heating element, and provides a method for reducing the hardness of magnesium oxide crystals used as filling material for an electric heating element. The magnesium oxide crystals are rapidly cooled using initial cooling parameters, and the initial cooling parameters are adjusted based on feedback such as the hardness of the magnesium oxide crystals obtained by rapid cooling. Finally, rapid cooling is performed using the adjusted cooling parameters, thereby improving the accuracy of reducing the hardness of the magnesium oxide crystals and thereby improving the effect of the magnesium oxide crystals during molding.

[0035] See also Figure 1 , Figure 1 A schematic diagram of a hardness reduction system for magnesium oxide crystals used as a filling material for an electric heating element is provided for an embodiment of the present application. Figure 1 As shown, the hardness reduction system 200 for magnesium oxide crystals used as filling materials for electric heating elements includes: a high-temperature calcining furnace 210, a cooling device 220, and a pneumatic transmission device 230, etc. Among them, the high-temperature calcining furnace 210 can be used to perform high-temperature calcination treatment on materials (such as magnesium oxide crystals involved in this application); the cooling device 220 can be used to cool the materials; the pneumatic transmission device 230 is a device that uses airflow to transport materials, and the device can be used for processing such as transporting or moving materials, and this application does not limit this.

[0036] See also Figure 2 , Figure 2 The present invention provides a flow chart of a method for reducing the hardness of magnesium oxide crystals used as a filling material for an electric heating element. Figure 2 As shown, the method is applied to a hardness reduction system of magnesium oxide crystals used as a filling material for an electric heating element, and the method comprises:

[0037] 201. Perform wind screening on the first magnesium oxide crystal group obtained by firing to obtain a second magnesium oxide crystal group.

[0038] The first magnesium oxide crystal group may be a crystal group composed of magnesium oxide crystals of any form before wind screening. For example, the first magnesium oxide crystal group may include block-shaped magnesium oxide crystals, large-particle-shaped magnesium oxide crystals, small-particle-shaped magnesium oxide crystals, and dust-shaped magnesium oxide crystals, etc., and the present application does not limit this.

[0039] The hardness reduction system of magnesium oxide crystals for electric heating element filling material can be carried out by wind screening to retain the magnesium oxide crystal group of the desired form, that is, the second magnesium oxide crystal group. The second magnesium oxide crystal group can be a crystal group composed of magnesium oxide crystals of the desired form after wind screening.

[0040] In a possible implementation, the first magnesium oxide crystal group obtained by firing is subjected to wind screening to obtain the second magnesium oxide crystal group, which may include the following steps:

[0041] A1. Performing initial wind screening on a first magnesium oxide crystal group using a first screening parameter to obtain a first reference magnesium oxide crystal group;

[0042] A2. Obtaining diameter distribution information of a first reference magnesium oxide crystal group;

[0043] A3. Determine a first diameter distribution center according to the diameter distribution information;

[0044] A4. If the diameter corresponding to the first diameter distribution center is greater than the maximum value of the diameter range corresponding to the preset diameter distribution center, the first reference magnesium oxide crystal group is subjected to secondary particle crushing to obtain a second reference magnesium oxide crystal group;

[0045] A5. Perform wind screening on the second reference magnesium oxide crystal group to obtain a second magnesium oxide crystal group.

[0046] The first reference magnesium oxide crystal group may be a reference magnesium oxide crystal group obtained after the first screening parameter is used for the initial wind screening. Optionally, the initial wind screening may be a reference magnesium oxide crystal group obtained after the dust-like magnesium oxide crystals are excluded from the screening, and the present application does not limit this.

[0047] The diameter distribution information of the first reference magnesium oxide crystal group may be information related to the diameter of each first reference magnesium oxide crystal in the first reference magnesium oxide crystal group. The first diameter distribution center may be a diameter distribution center determined according to the diameter distribution information. Optionally, the first diameter distribution center may be determined according to the diameter distribution information by using an arithmetic mean method, a median method, a mode method, or a weighted average method, and the present application does not limit this.

[0048] The preset diameter distribution center may be a preset diameter distribution center or a system default diameter distribution center, and the present application does not limit this. It is understandable that if the diameter corresponding to the first diameter distribution center is greater than the maximum value of the diameter range corresponding to the preset diameter distribution center, it means that the diameter distribution of the first reference magnesium oxide crystal group is in a larger diameter range, and the first reference magnesium oxide crystal group needs to be processed to narrow the diameter distribution range of the magnesium oxide crystal group, and the present application does not limit this.

[0049] The second reference magnesium oxide crystal group can be a reference magnesium oxide crystal group obtained after a secondary granulation process. Optionally, the secondary granulation process can be a process of granulating the material again after a primary granulation process, and the secondary granulation process can use the same or different equipment and technology as the primary granulation process, and the present application does not limit this.

[0050] Optionally, the magnesium oxide crystals in the second magnesium oxide crystal group may be magnesium oxide crystals in the form of small particles, and the diameter of the magnesium oxide crystals in the form of small particles may be 0.045 mm to 0.425 mm, which is not limited in the present application. It is understandable that in situations where fine filling is required or where the uniformity of material distribution is required to be high, magnesium oxide crystals in the form of small particles are easier to achieve uniform distribution and also have better adsorption performance, which is not limited in the present application.

[0051] In this example, a first reference magnesium oxide crystal group can be obtained by performing initial wind screening on the first magnesium oxide crystal group using the first screening parameter, and the diameter distribution information of the first reference magnesium oxide crystal group can be obtained, so as to further determine the first diameter distribution center according to the diameter distribution information, so that when the diameter corresponding to the first diameter distribution center is greater than the maximum value of the diameter range corresponding to the preset diameter distribution center, the first reference magnesium oxide crystal group is subjected to secondary particle crushing to obtain a second reference magnesium oxide crystal group, and then the second reference magnesium oxide crystal group can be wind screened to obtain a second magnesium oxide crystal group that better meets the particle morphology requirements, which is beneficial to quickly and conveniently reduce the hardness of the magnesium oxide crystals in subsequent steps, and effectively improve the efficiency of insulating filling inside the electric heating element.

[0052] 202. The second magnesium oxide crystal group is transferred to a high-temperature calcining furnace and heated to a preset temperature value. The high-temperature calcining furnace is filled with nitrogen and then heated when heating the second magnesium oxide crystal group.

[0053] Among them, the preset temperature value can be pre-set according to demand. Optionally, the preset temperature can be any temperature value between 1200 degrees Celsius and 1700 degrees Celsius, for example, 1300 degrees Celsius, 1400 degrees Celsius, 1500 degrees Celsius, 1600 degrees Celsius, etc. It should be noted that the high-temperature calcining furnace is gradually heated to make the magnesium oxide crystals at the preset temperature value, thereby intensifying the particle movement inside the magnesium oxide crystals and increasing the atomic distance, which is beneficial to better destroy the internal structure of the magnesium oxide crystals in the subsequent steps, so as to reduce the hardness of the magnesium oxide crystals more quickly and conveniently.

[0054] 203. Transfer the first sample magnesium oxide crystal group in the second magnesium oxide crystal group at the preset temperature value to a cooling device for rapid cooling using a first rapid cooling control parameter to obtain a target magnesium oxide crystal group.

[0055] The first sample magnesium oxide crystal group may be a part of the second magnesium oxide crystal group at a preset temperature value. The hardness reduction system of magnesium oxide crystals for electric heating element filling material may obtain the first sample magnesium oxide crystal group by controlling the time of transmitting the second magnesium oxide crystal group at a preset temperature value, or controlling the volume of the transmitted second magnesium oxide crystal group at a preset temperature value, and the present application does not limit this.

[0056] The first quenching control parameter may be an initial quenching control parameter of the cooling device, which may be pre-set by rough adjustment or set by system default, and the present application does not limit this. Optionally, the quenching control parameter may include cooling temperature, cooling speed, cooling medium flow rate, cooling medium inlet temperature, etc., and the present application does not limit this.

[0057] The target magnesium oxide crystal group may be a magnesium oxide crystal group obtained by rapid cooling by a cooling device using a first rapid cooling control parameter. It is understandable that the target magnesium oxide crystal group is obtained by using the first rapid cooling control parameter, and may not achieve the required hardness reduction. Optionally, the hardness reduction system for magnesium oxide crystals for electric heating element filling material can also reheat and recool the target magnesium oxide crystal group to obtain a magnesium oxide crystal group that can meet the hardness requirements.

[0058] The hardness reduction system of magnesium oxide crystals used as filling materials for electric heating elements can analyze the cooling process of a first sample magnesium oxide crystal group to adjust a first quenching control parameter, thereby obtaining a quenching control parameter that better meets the requirements, and then using the adjusted quenching control parameter to obtain a magnesium oxide crystal group that can achieve the required hardness.

[0059] The cooling device includes a first cooling pipe and a second cooling pipe. The first cooling pipe is inside the second cooling pipe. A cooling medium is filled between the outer wall of the first cooling pipe and the inner wall of the second cooling pipe. The cooling medium can be water or the like. The cooling medium can flow to maintain the cooling temperature inside the first cooling pipe. The target magnesium oxide crystal group is pneumatically transported in the first cooling pipe of the cooling device.

[0060] 204. Acquire a first image set when a first sample magnesium oxide crystal group is pneumatically transported through a pneumatic transport device.

[0061] Among them, the first image set may include one or more first images, and the first image may be a multi-angle shot image of the first sample magnesium oxide crystal group during the pneumatic transmission process through the pneumatic transmission device. The first image may include a macroscopic transmission image of the first sample magnesium oxide crystal group, and may also include a microscopic structure image of each first sample magnesium oxide crystal in the first sample magnesium oxide crystal group. The present application does not impose any restrictions on this.

[0062] 205. Determine rapid cooling parameter adjustment information according to the first image set.

[0063] The quenching parameter adjustment information may be information for adjusting the first quenching control parameter determined by the first image set. Optionally, the quenching parameter adjustment information may correspond to the first quenching control parameter, that is, the quenching parameter adjustment information may include adjustment information for the first quenching control parameter (such as cooling temperature and / or cooling speed, etc.), which is not limited in this application.

[0064] In a possible implementation, determining the quenching parameter adjustment information according to the first image set may include the following steps:

[0065] A1. constructing a three-dimensional distribution model of a first sample magnesium oxide crystal group during pneumatic transmission using a first image set;

[0066] A2. Extracting appearance information of k reference magnesium oxide crystals from the three-dimensional distribution model to obtain k first appearance information, where the reference magnesium oxide crystal is a second magnesium oxide crystal randomly selected from the first sample magnesium oxide crystal group;

[0067] A3. Determine rapid cooling control parameter adjustment information according to the k first appearance information.

[0068] The three-dimensional distribution model may be a distribution model constructed based on various distribution forms of the first sample magnesium oxide crystal group during the pneumatic transmission process. Optionally, the method for constructing the three-dimensional distribution model based on the first image set may adopt an existing three-dimensional model construction method, such as using professional three-dimensional modeling software or using voxel modeling to construct the three-dimensional distribution model, and this application does not limit this.

[0069] The reference magnesium oxide crystal may be any magnesium oxide crystal of the first sample magnesium oxide crystal group. It is understandable that the reference magnesium oxide crystal may be a magnesium oxide crystal that is convenient for observing the appearance morphology, so as to better determine the subsequent quenching parameter adjustment information based on the reference magnesium oxide crystal, and the present application does not limit this.

[0070] Optionally, the k first appearance information may correspond to the k reference magnesium oxide crystals one by one and be used to describe the appearance morphology. The hardness reduction system for magnesium oxide crystals used as filling material for electric heating elements may obtain quenching parameter adjustment information by analyzing the k first appearance information.

[0071] In this example, by using the first image set to construct a three-dimensional distribution model of the first sample magnesium oxide crystal group during pneumatic transmission, and extracting the appearance information of k reference magnesium oxide crystals from the three-dimensional distribution model, k first appearance information can be obtained, so that the quenching control parameter adjustment information can be determined based on the k first appearance information, which is beneficial to quickly and conveniently reducing the hardness of the magnesium oxide crystals in subsequent steps.

[0072] In a possible implementation, determining the quenching parameter adjustment information according to the k first appearance information may include the following steps:

[0073] B1. determining the crack shape parameters of each reference magnesium oxide crystal on each crystal plane according to the k first appearance information to obtain a crack shape parameter set;

[0074] B2. determining the maximum crack length and maximum crack width of the corresponding crack according to the crack shape parameters in the crack shape parameter set;

[0075] B3. Predict the crack depth of the corresponding crack according to the maximum crack length and maximum crack width of the crack;

[0076] B4, determining the current hardness information of the reference magnesium oxide crystal according to the crack shape parameters and the corresponding crack depth of the reference magnesium oxide crystal on each crystal surface;

[0077] B5. Obtaining a deviation value between the current hardness information and the preset hardness information;

[0078] B6. Determine the quenching parameter adjustment information based on the deviation value.

[0079] The crack shape parameter set may include one or more crack shape parameters, which may be used to indicate the crack shape on the crystal surface. Optionally, the crack shape parameter may include, but is not limited to, linear cracks, curved cracks, mesh cracks, arc cracks, and irregular cracks, etc., which are not limited in this application.

[0080] The maximum crack length can be used to indicate the maximum value of the crack length in the crack shape parameters. The maximum crack width can be used to indicate the maximum value of the crack width in the crack shape parameters. The crack depth can be used to indicate the depth of the crack predicted based on the maximum crack length and the maximum crack width. Optionally, the hardness reduction system of magnesium oxide crystals for electric heating element filling materials can adopt existing crack depth prediction methods, such as using a method of constructing a crack prediction model based on fracture mechanics to predict the corresponding depth of the crack based on the maximum crack length and the maximum crack width, and this application does not impose any restrictions on this.

[0081] The current hardness information may be the hardness information of the reference magnesium oxide crystal during the current pneumatic transmission process, that is, the hardness information during the rapid cooling process. The preset hardness information may be a hardness information estimated for the rapid cooling process, and the preset hardness information may be set by itself or by default by the system, and this application does not limit this.

[0082] It can be understood that different hardness information may exist for magnesium oxide crystals at different pneumatic transmission moments and / or at different pneumatic transmission positions. For example, different hardness information may exist for magnesium oxide crystals at pneumatic transmission moment 1 and magnesium oxide crystals at pneumatic transmission moment 5; different hardness information may exist for magnesium oxide crystals at the pneumatic transmission inlet and magnesium oxide crystals at the pneumatic transmission outlet. Optionally, different preset hardness information may exist for magnesium oxide crystals at different pneumatic transmission moments and / or at different pneumatic transmission positions. For example, magnesium oxide crystals at pneumatic transmission moment 1 may correspond to preset hardness information 1, and magnesium oxide crystals at pneumatic transmission moment 5 may correspond to preset hardness information 2; magnesium oxide crystals at the pneumatic transmission inlet may correspond to preset hardness information 3, and magnesium oxide crystals at the pneumatic transmission outlet may correspond to preset hardness information 4. The present application does not limit this.

[0083] The deviation value can be used to indicate the difference between the current hardness information and the preset hardness information. Optionally, if the deviation value is large, that is, the difference between the current hardness information and the preset hardness information is large, indicating that the current hardness information is much larger than the preset hardness information, then the current quenching treatment effect is not ideal, and the first quenching control parameter of the cooling device needs to be adjusted; if the deviation value is small, that is, the difference between the current hardness information and the preset hardness information is small, indicating that the current hardness information is slightly larger than the preset hardness information, then the current quenching treatment effect is relatively ideal, and the first quenching control parameter of the cooling device can also be fine-tuned, and the present application does not impose any restrictions on this. Optionally, if the deviation value is a negative number, indicating that the current hardness information is less than the preset hardness information, then the current quenching treatment effect exceeds expectations, and it can be determined whether to adjust the quenching control parameters according to the specific situation, and the present application does not impose any restrictions on this.

[0084] Optionally, the hardness reduction system of the magnesium oxide crystal used as the filling material of the electric heating element can adjust each parameter of the first quenching control parameter separately, and repeat the relevant contents of the aforementioned steps 202 to 205 to find out the most suitable quenching parameter adjustment information, and then the first quenching control parameter can be adjusted according to the quenching parameter adjustment information. The present application does not impose any restrictions on this.

[0085] In this example, the crack shape parameters of each reference magnesium oxide crystal on each crystal plane are determined based on k first appearance information, and a crack shape parameter set can be obtained. The maximum crack length and maximum crack width of the corresponding crack can be determined based on the crack shape parameters in the crack shape parameter set, so as to further predict the crack depth of the corresponding crack based on the maximum crack length and maximum crack width of the crack. Therefore, the current hardness information of the reference magnesium oxide crystal can be determined based on the crack shape parameters and the corresponding crack depth of the reference magnesium oxide crystal on each crystal plane, and the deviation value between the current hardness information and the preset hardness information can be further obtained, and then the quenching parameter adjustment information can be determined based on the deviation value, which is beneficial to quickly and conveniently reducing the hardness of the magnesium oxide crystal in subsequent steps.

[0086] 206. Adjust the first quenching control parameter according to the quenching parameter adjustment information to obtain a second quenching control parameter.

[0087] The second quenching control parameter may be a quenching control parameter obtained by adjusting the first quenching control parameter through the quenching parameter adjustment information. In other words, the second quenching control parameter may enable the magnesium oxide crystals after quenching to meet a more satisfactory hardness condition, which is not limited in this application.

[0088] 207. Use the second rapid cooling control parameter to control the cooling device to rapidly cool the second sample magnesium oxide crystal group to obtain magnesium oxide crystals for electric heating element filling material.

[0089] The second sample magnesium oxide crystal group may be a part of the second magnesium oxide crystal group at a preset temperature value. It is understandable that the second sample magnesium oxide crystal and the first sample magnesium oxide crystal are different magnesium oxide crystals in the second magnesium oxide crystal group, and the present application does not limit this.

[0090] The magnesium oxide crystals used as the filling material of the electric heating element can be magnesium oxide crystals obtained after the cooling device with the second rapid cooling control parameter is used to rapidly cool the second sample magnesium oxide crystal group. It is understandable that the magnesium oxide crystals used as the filling material of the electric heating element have a lower hardness and a stronger adsorption force, and can be better stirred and mixed, and this application does not limit this.

[0091] In this example, a second magnesium oxide crystal group can be obtained by performing pneumatic screening on the first magnesium oxide crystal group obtained by firing, and the second magnesium oxide crystal group is transferred to a high-temperature calcining furnace and heated to a preset temperature value, so as to further transfer the first sample magnesium oxide crystal group in the second magnesium oxide crystal group at the preset temperature value to a cooling device for rapid cooling using a first rapid cooling control parameter, so as to obtain a first image set when the first sample magnesium oxide crystal group is pneumatically transmitted through a pneumatic transmission device, and rapid cooling parameter adjustment information is determined according to the first image set, so that the first rapid cooling control parameter can be adjusted according to the rapid cooling parameter adjustment information to obtain a second rapid cooling control parameter, and then the second rapid cooling control parameter can be used to control the cooling device to rapidly cool the second sample magnesium oxide crystal group, and the magnesium oxide crystals are rapidly cooled by the initial cooling parameters, and the initial cooling parameters are adjusted according to feedback such as the hardness of the magnesium oxide crystals obtained by rapid cooling, and finally the adjusted cooling parameters are used for rapid cooling, thereby improving the accuracy of reducing the hardness of the magnesium oxide crystals, and thereby improving the effect of the magnesium oxide crystals when forming.

[0092] In a possible implementation, after performing wind screening on the second reference magnesium oxide crystal group to obtain the second magnesium oxide crystal group, the method further includes:

[0093] C1. Obtain the quenching loss information of the cooling device;

[0094] C2. Adjust the second quenching control parameter according to the quenching loss information to obtain the third quenching control parameter.

[0095] The rapid cooling loss information may include refrigeration loss information of the cooling device, etc. After the cooling device is used, its refrigeration capacity will be reduced to varying degrees. At this time, the loss information of the cooling device after rapid cooling can be obtained to determine the rapid cooling capacity of the cooling device when it is used next time.

[0096] The adjustment information of the quenching control parameter can be determined according to the quenching loss information. For example, the greater the refrigeration loss information, the greater the increase in the cooling medium flow rate in the second quenching control parameter, and the smaller the refrigeration loss information, the smaller the increase in the cooling medium flow rate in the second quenching control parameter. Due to the reduction in refrigeration capacity, the medium cooling time in the quenching control parameter needs to be increased. At this time, the greater the refrigeration loss information, the greater the increase in the medium cooling time; the smaller the refrigeration loss information, the smaller the increase in the medium cooling time.

[0097] Therefore, the second quenching control parameter can be adjusted according to the quenching loss information to obtain the third quenching control parameter, and then the third quenching control parameter is used to control the subsequent quenching of the magnesium oxide crystals, which can improve the accuracy of the subsequent quenching of the magnesium oxide crystals.

[0098] The above mainly introduces the scheme of the embodiment of the present application from the perspective of the execution process on the method side. It is understandable that in order to realize the above functions, the terminal includes a hardware structure and / or software module corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments provided herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0099] The embodiment of the present application can divide the terminal into functional units according to the above method example. For example, each functional unit can be divided according to each function, or two or more functions can be integrated into one processing unit. The above integrated unit can be implemented in the form of hardware or in the form of software functional units. It should be noted that the division of units in the embodiment of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation.

[0100] In line with the above, see Figure 3 , Figure 3 The present invention provides a schematic structural diagram of a device for reducing the hardness of magnesium oxide crystals used as a filling material for an electric heating element. Figure 3 As shown, the device is applied to a hardness reduction system of magnesium oxide crystals for electric heating element filling materials, the system comprises: a high temperature calcining furnace 210, a cooling device 220 and a pneumatic transmission device 230, and the hardness reduction device of magnesium oxide crystals for electric heating element filling materials comprises:

[0101] The first processing unit 101 is used to perform wind screening on the first magnesium oxide crystal group obtained by firing to obtain a second magnesium oxide crystal group;

[0102] The second processing unit 102 is used to transfer the second magnesium oxide crystal group to a high-temperature calcining furnace and heat it to a preset temperature value. When the high-temperature calcining furnace heats the second magnesium oxide crystal group, it is filled with nitrogen and then heated;

[0103] The third processing unit 103 is used to transfer the first sample magnesium oxide crystal group in the second magnesium oxide crystal group at a preset temperature value to a cooling device for rapid cooling using a first rapid cooling control parameter to obtain a target magnesium oxide crystal group;

[0104] A first acquisition unit 104 is used to acquire a first image set when a first sample magnesium oxide crystal group is pneumatically transported through a pneumatic transport device;

[0105] A first determining unit 105, configured to determine quenching parameter adjustment information according to the first image set;

[0106] The fourth processing unit 106 is used to adjust the first quenching control parameter according to the quenching parameter adjustment information to obtain a second quenching control parameter;

[0107] The fifth processing unit 107 is used to control the cooling device to rapidly cool the second sample magnesium oxide crystal group by using the second rapid cooling control parameter to obtain magnesium oxide crystals for electric heating element filling material.

[0108] In a possible implementation, the first determining unit 105 is configured to determine the quenching parameter adjustment information according to the first image set, specifically to:

[0109] Using the first image set, constructing a three-dimensional distribution model of a first sample magnesium oxide crystal group during pneumatic transmission;

[0110] Extracting appearance information of k reference magnesium oxide crystals from the three-dimensional distribution model to obtain k first appearance information, wherein the reference magnesium oxide crystals are magnesium oxide crystals randomly selected from the first sample magnesium oxide crystal group;

[0111] The rapid cooling parameter adjustment information is determined according to the k first appearance information.

[0112] In a possible implementation, the first determining unit 105 is configured to determine the quenching parameter adjustment information according to the k first appearance information, specifically to:

[0113] Determine the crack shape parameters of each reference magnesium oxide crystal on each crystal plane according to the k first appearance information to obtain a crack shape parameter set;

[0114] Determine the maximum crack length and the maximum crack width of the corresponding crack according to the crack shape parameters in the crack shape parameter set;

[0115] The crack depth of the corresponding crack is predicted according to the maximum crack length and the maximum crack width of the crack;

[0116] Determine the current hardness information of the reference magnesium oxide crystal according to the crack shape parameters and the corresponding crack depth of the reference magnesium oxide crystal on each crystal surface;

[0117] Obtaining the deviation value between the current hardness information and the preset hardness information;

[0118] The quenching parameter adjustment information is determined according to the deviation value.

[0119] In a possible implementation, the first processing unit 101 is used to perform wind screening on the first magnesium oxide crystal group obtained by firing to obtain the second magnesium oxide crystal group, specifically for:

[0120] Performing a first wind screening on the first magnesium oxide crystal group using a first screening parameter to obtain a first reference magnesium oxide crystal group;

[0121] Obtaining diameter distribution information of a first reference magnesium oxide crystal group;

[0122] determining a first diameter distribution center according to the diameter distribution information;

[0123] If the diameter corresponding to the first diameter distribution center is greater than the maximum value of the diameter range corresponding to the preset diameter distribution center, the first reference magnesium oxide crystal group is subjected to secondary particle crushing to obtain a second reference magnesium oxide crystal group;

[0124] The second reference magnesium oxide crystal group is subjected to wind screening to obtain a second magnesium oxide crystal group.

[0125] In a possible implementation, after the second reference magnesium oxide crystal group is subjected to wind screening to obtain the second magnesium oxide crystal group, the device for reducing the hardness of magnesium oxide crystals for electric heating element filling material is further used to:

[0126] Obtain quenching loss information of the cooling device;

[0127] The second quenching control parameter is adjusted according to the quenching loss information to obtain a third quenching control parameter.

[0128] An embodiment of the present application also provides a computer storage medium, wherein the computer storage medium stores a computer program for electronic data exchange, and the computer program enables a computer to execute part or all of the steps of any method for reducing the hardness of magnesium oxide crystals used as a filling material for an electric heating element as described in the above method embodiments.

[0129] An embodiment of the present application also provides a computer program product, which includes a non-transitory computer-readable storage medium storing a computer program, and the computer program enables a computer to execute part or all of the steps of any method for reducing the hardness of magnesium oxide crystals used as a filling material for an electric heating element as recorded in the above method embodiments.

[0130] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0131] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0132] In the several embodiments provided in the present application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are only schematic, such as the division of the units, which is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the device or unit can be electrical or other forms.

[0133] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0134] In addition, the functional units in the various embodiments of the application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware or in the form of software program modules.

[0135] If the integrated unit is implemented in the form of a software program module and sold or used as an independent product, it can be stored in a computer-readable memory. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a memory, including a number of instructions to enable a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned memory includes: U disk, read-only memory (ROM), random access memory (RAM), mobile hard disk, disk or optical disk and other media that can store program codes.

[0136] A person of ordinary skill in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable memory, which can include: a flash drive, a read-only memory, a random access memory, a magnetic disk or an optical disk, etc.

[0137] The embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A method for reducing the hardness of magnesium oxide crystals used as a filling material for an electric heating element, characterized in that: The method is applied to a hardness reduction system of magnesium oxide crystals used as filling materials for electric heating elements, the system comprising: a high-temperature calcining furnace, a cooling device and a pneumatic transmission device, the method comprising: Performing wind screening on the first magnesium oxide crystal group obtained by firing to obtain a second magnesium oxide crystal group; The second magnesium oxide crystal group is transferred to a high-temperature calcining furnace and heated to a preset temperature value, wherein the high-temperature calcining furnace is filled with nitrogen and then heated when heating the second magnesium oxide crystal group; The first sample magnesium oxide crystal group in the second magnesium oxide crystal group at the preset temperature value is transferred to a cooling device for rapid cooling using a first rapid cooling control parameter to obtain a target magnesium oxide crystal group; Acquiring a first set of images when the first sample magnesium oxide crystal group is pneumatically transported through a pneumatic transport device; determining quenching parameter adjustment information according to the first image set; Adjust the first quenching control parameter according to the quenching parameter adjustment information to obtain a second quenching control parameter; The cooling device is controlled by the second rapid cooling control parameter to rapidly cool the second sample magnesium oxide crystal group to obtain magnesium oxide crystals for electric heating element filling material; The determining of the quenching parameter adjustment information according to the first image set includes: Using the first image set to construct a three-dimensional distribution model of the first sample magnesium oxide crystal group during pneumatic transmission; Extracting appearance information of k reference magnesium oxide crystals from the three-dimensional distribution model to obtain k first appearance information, wherein the reference magnesium oxide crystals are magnesium oxide crystals randomly selected from the first sample magnesium oxide crystal group; The rapid cooling parameter adjustment information is determined according to the k pieces of the first appearance information.

2. The method for reducing the hardness of magnesium oxide crystals for electric heating element filling material according to claim 1, characterized in that: The determining the quenching parameter adjustment information according to the k first appearance information includes: Determine the crack shape parameters of each reference magnesium oxide crystal on each crystal plane according to the k first appearance information to obtain a crack shape parameter set; Determining the maximum crack length and the maximum crack width of the corresponding crack according to the crack shape parameters in the crack shape parameter set; The crack depth of the corresponding crack is predicted according to the maximum crack length and the maximum crack width of the crack; Determining current hardness information of the reference magnesium oxide crystal according to crack shape parameters and corresponding crack depths of the reference magnesium oxide crystal on each crystal face; Obtaining a deviation value between the current hardness information and the preset hardness information; Rapid cooling parameter adjustment information is determined according to the deviation value.

3. The method for reducing the hardness of magnesium oxide crystals for electric heating element filling material according to any one of claims 1 to 2, characterized in that: The method of performing wind screening on the first magnesium oxide crystal group obtained by firing to obtain the second magnesium oxide crystal group comprises: Performing a primary wind screening on the first magnesium oxide crystal group using a first screening parameter to obtain a first reference magnesium oxide crystal group; Obtaining diameter distribution information of the first reference magnesium oxide crystal group; Determine a first diameter distribution center according to the diameter distribution information; If the diameter corresponding to the first diameter distribution center is greater than the maximum value of the diameter range corresponding to the preset diameter distribution center, performing a secondary crushing process on the first reference magnesium oxide crystal group to obtain a second reference magnesium oxide crystal group; The second reference magnesium oxide crystal group is subjected to wind screening to obtain the second magnesium oxide crystal group.

4. The method for reducing the hardness of magnesium oxide crystals for electric heating element filling material according to claim 3, characterized in that: After the second reference magnesium oxide crystal group is subjected to wind screening to obtain the second magnesium oxide crystal group, the method further includes: Acquire quenching loss information of the cooling device; The second quenching control parameter is adjusted according to the quenching loss information to obtain a third quenching control parameter.

5. A device for reducing the hardness of magnesium oxide crystals used as a filling material for an electric heating element, characterized in that: The device is applied to a hardness reduction system of magnesium oxide crystals used as filling materials for electric heating elements. The system comprises: a high-temperature calcining furnace, a cooling device and a pneumatic transmission device. The device for reducing the hardness of magnesium oxide crystals used as filling materials for electric heating elements comprises: A first processing unit is used to perform wind screening on the first magnesium oxide crystal group obtained by firing to obtain a second magnesium oxide crystal group; A second processing unit is used to transfer the second magnesium oxide crystal group to a high-temperature calcining furnace and heat it to a preset temperature value, wherein the high-temperature calcining furnace is filled with nitrogen and then heated when heating the second magnesium oxide crystal group; A third processing unit is used to transfer the first sample magnesium oxide crystal group in the second magnesium oxide crystal group at a preset temperature value to a cooling device for rapid cooling using a first rapid cooling control parameter to obtain a target magnesium oxide crystal group; A first acquisition unit is used to acquire a first image set when the first sample magnesium oxide crystal group is pneumatically transported through a pneumatic transmission device; A first determining unit, configured to determine rapid cooling parameter adjustment information according to the first image set; a fourth processing unit, configured to adjust the first quenching control parameter according to the quenching parameter adjustment information to obtain a second quenching control parameter; A fifth processing unit, configured to use the second rapid cooling control parameter to control a cooling device to rapidly cool the second sample magnesium oxide crystal group to obtain magnesium oxide crystals for electric heating element filling material; The first determining unit is specifically configured to: Using the first image set to construct a three-dimensional distribution model of the first sample magnesium oxide crystal group during pneumatic transmission; Extracting appearance information of k reference magnesium oxide crystals from the three-dimensional distribution model to obtain k first appearance information, wherein the reference magnesium oxide crystals are magnesium oxide crystals randomly selected from the first sample magnesium oxide crystal group; The rapid cooling parameter adjustment information is determined according to the k pieces of the first appearance information.

6. The device for reducing the hardness of magnesium oxide crystals for electric heating element filling material according to claim 5, characterized in that: In the aspect of determining the quenching parameter adjustment information according to the k pieces of the first appearance information, the method includes: Determine the crack shape parameters of each reference magnesium oxide crystal on each crystal plane according to the k first appearance information to obtain a crack shape parameter set; Determining the maximum crack length and the maximum crack width of the corresponding crack according to the crack shape parameters in the crack shape parameter set; The crack depth of the corresponding crack is predicted according to the maximum crack length and the maximum crack width of the crack; Determining current hardness information of the reference magnesium oxide crystal according to crack shape parameters and corresponding crack depths of the reference magnesium oxide crystal on each crystal face; Obtaining a deviation value between the current hardness information and the preset hardness information; Rapid cooling parameter adjustment information is determined according to the deviation value.

7. A terminal, characterized in that: The method comprises a processor, an input device, an output device and a memory, wherein the processor, the input device, the output device and the memory are interconnected, wherein the memory is used to store a computer program, the computer program comprises program instructions, and the processor is configured to call the program instructions to execute the method for reducing the hardness of magnesium oxide crystals used as filling materials for electric heating elements as described in any one of claims 1 to 4.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, which includes program instructions. When the program instructions are executed by a processor, the processor executes the method for reducing the hardness of magnesium oxide crystals for electric heating element filling materials according to any one of claims 1 to 4.

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