Soaking annealing furnace

Abstract

The utility model discloses a soaking annealing furnace, which belongs to the field of sample processing and comprises a furnace body. A cavity is formed in the furnace body, a heat insulation layer is arranged between the furnace body and the cavity, heating elements are embedded in the four faces and the top face of the cavity, a plurality of temperature measuring elements are arranged in the cavity, and a sample supporting frame is arranged at the bottom in the cavity. According to the utility model, multi-surface heating and multi-point temperature control can be realized, so that the temperatures of all parts in the cavity are the same, the heating uniformity of a sample can be improved, and the experiment efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the field of sample processing, in particular to a high-precision soaking annealing furnace. Background Art

[0002] Glass is a material with many excellent properties, including excellent transparency and chemical stability; high hardness, resistance to wear, and excellent plasticity at certain temperatures. Therefore, glass products are processed at high temperatures, such as adding colorants to produce a variety of beautiful colors, and then heated to a fluid state to be processed into various industrial shapes for use in various industries.

[0003] With technological advancements and improved quality of life, liquid crystal display technology is now widely used in a variety of products, including mobile phones, computers, and televisions. As an essential electronic glass material for display devices, the mother glass undergoes multiple processing steps after production before it can be delivered to users. These include annealing of the substrate glass and crystallization and nucleation of the glass-ceramic. Annealing heats permanently stressed glass products to a temperature where particles within the glass can move. This displacement relaxes stress, thereby eliminating or reducing permanent stress. Crystallization and nucleation, through an effective heating, cooling, and incubation process, causes certain groups within the glass to react, creating a second phase distinct from the glass phase, enhancing the glass's hardness and strength.

[0004] At present, traditional annealing furnaces are generally heated on three sides and have only one temperature measuring element. The temperature difference between the center and the bottom of the furnace is large. The temperature is higher near the heating element, and lower at the center. When the annealing furnace is working, if different samples are placed in different positions, the uneven heating will lead to large differences in the quality and performance of the same batch of samples, which may also lead to a decline in the quality and performance of the final product. In order to ensure the uniformity of the samples, the samples are placed in the same position every time, and the experimental efficiency will be low. Therefore, a high-precision soaking annealing furnace is urgently needed to solve the problems of uneven heating of the annealing furnace, uneven heating of the samples, and low experimental efficiency. Utility Model Content

[0005] The purpose of the utility model is to provide a soaking annealing furnace, which can heat on multiple surfaces and control the temperature at multiple points to make the temperature at each location in the cavity the same, thereby improving the uniformity of heating the sample and improving the experimental efficiency to overcome the shortcomings of the existing annealing furnace, such as uneven heating of the sample and low experimental efficiency.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] It includes a furnace body; a cavity is arranged inside the furnace body, a thermal insulation layer is arranged between the furnace body and the cavity, heating elements are embedded in the four sides and the top surface of the cavity, multiple temperature measuring elements are arranged in the cavity, and a sample support frame is arranged at the bottom of the cavity. The height and shape of the sample support frame can be replaced according to experimental requirements to meet various experimental requirements.

[0008] Furthermore, the furnace body and the cavity are both provided with a plurality of holes to facilitate the sealed insertion of the temperature measuring element into the cavity.

[0009] Furthermore, the thermal insulation layer includes an air layer and a thermal insulation layer; the thermal insulation layer fits the cavity, and the air layer is located between the thermal insulation layer and the furnace body.

[0010] Furthermore, a fan is provided on the inner wall of the furnace body, and the fan is connected to the heat insulation layer. The fan can be turned on or off and the operating power can be adjusted according to program requirements to facilitate rapid heat dissipation after the annealing furnace is finished working.

[0011] Furthermore, the bottom surface of the furnace body is connected to the base, and a liquid crystal display and multiple PID controllers are set on the side of the base. The liquid crystal display displays the temperature measured by each temperature measuring element.

[0012] Furthermore, the cavity is made of refractory material, and the refractory material is high-temperature resistant mullite refractory material.

[0013] Furthermore, the sample support is made of refractory material.

[0014] Furthermore, the heating element is a silicon carbon rod, which meets the experimental requirements of higher temperatures.

[0015] Furthermore, the temperature measuring elements are thermocouples, the number of which is ≥5, and multi-point temperature control can be achieved.

[0016] Furthermore, each group of heating elements is connected to the temperature measuring elements at the corresponding positions and controlled by a PID controller, which can simultaneously detect the temperatures of multiple positions in the cavity. Through the program self-tuning function, the heater power is adjusted to effectively reduce the temperature difference in various places in the furnace and achieve precise temperature control.

[0017] Compared with the prior art, the present invention has the following beneficial technical effects:

[0018] The utility model provides a soaking annealing furnace, in which multiple heating elements are embedded in the four sides and the top surface of the cavity to ensure that the cavity is heated evenly; multiple temperature measuring elements are inserted in the cavity to detect the temperatures of multiple positions in the cavity, and the power of the heater is adjusted in time, thereby effectively reducing the temperature difference in various places in the furnace and realizing precise temperature control; a sample support frame made of refractory material is arranged in the cavity to ensure that the sample is placed in the same position each time and is heated evenly, thereby ensuring the uniformity of the sample; the utility model can realize multi-faceted heating and multi-point temperature control to make the temperature at various places in the cavity the same, thereby improving the uniformity of sample heating and improving experimental efficiency at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of a high-precision soaking annealing furnace in an embodiment of the present utility model.

[0020] In the figure, 1. furnace body; 2. thermal insulation layer; 3. thermal insulation material; 4. heating element; 5. temperature measuring element; 6. fan; 7. sample support frame; 8. liquid crystal display; 9. PID controller; 10. thermal insulation layer. DETAILED DESCRIPTION

[0021] In order to help those skilled in the art better understand the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0022] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. 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 necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0023] See Figure 1The heat-insulating annealing furnace of embodiment 1 is provided with heat-insulating annealing furnace, and heat-insulating annealing furnace comprises furnace body 1; A cavity 3 is arranged inside the furnace body 1, and a heat insulation layer is arranged between the furnace body 1 and the cavity 3, and heating elements 4 are embedded in the four sides and the top surface of the cavity 3 to ensure that the cavity is heated evenly, and a plurality of temperature measuring elements 5 are arranged in the cavity 3, and a plurality of holes are provided on the furnace body 1 and the cavity 3 to facilitate the temperature measuring elements 5 to be sealed and inserted into the cavity 3; The bottom surface of the furnace body 1 is connected to the base, and a liquid crystal display 8 and a plurality of PID controllers 9 are arranged on the side surface of the base, and the liquid crystal display 8 displays the temperature measured by each temperature measuring element 5, and each group of heating elements 4 is connected to the temperature measuring element 5 at the corresponding position, and is controlled by the PID controller 9 to automatically adjust the power of the heating element according to the comparison between the temperature measured by the temperature measuring element 5 and the temperature required by the program; A sample support frame 7 made of refractory material is arranged in the cavity, and the height and shape of the sample support frame 7 can be replaced according to the experimental requirements to meet a variety of experimental requirements and ensure that the same batch of samples are heated to the same degree and have uniformity.

[0024] In some embodiments of the present invention, a fan 6 is provided on the outer wall of the furnace body 1, and the fan 6 is connected to the heat insulation layer. The fan 6 can be turned on or off and the operating power can be adjusted according to program requirements to facilitate rapid heat dissipation after the annealing furnace is finished working.

[0025] In some embodiments of the present invention, the cavity 3 is made of a refractory material, and the refractory material is a high-temperature resistant mullite refractory material.

[0026] In some embodiments of the present invention, the temperature measuring element 5 is a thermocouple, the number of which is ≥5, so as to realize multi-point temperature control.

[0027] In some embodiments of the present invention, the heating element 4 is a silicon carbon rod, which can meet the experimental requirements of higher temperatures.

[0028] The working process steps of this utility model are as follows:

[0029] S1, select a suitable sample support rack 7 according to the shape and quantity of the sample, place it in the chamber, place the sample to be processed, and then close the furnace door;

[0030] S2, turn on the power of the equipment, set the program on the LCD 8, and the annealing furnace starts to heat up;

[0031] S3, each PID controller 9 displays the temperature and output power detected by the corresponding temperature measuring element 5, and the LCD 8 displays the temperature measured by each temperature measuring element 5, and forms a temperature curve to facilitate observation of temperature fluctuations;

[0032] S4, when the temperature fluctuation on one side is large, the PID controller 9 at the corresponding position automatically adjusts the heating power and the temperature to ensure temperature uniformity;

[0033] S5, when it comes to the cooling process, the controller adjusts the operating speed of the fan 6 according to the cooling speed, so as to facilitate rapid heat dissipation after the annealing furnace is finished.

[0034] S6, after the experiment is finished and cooled to room temperature, take out the sample and the sample support frame 7, and turn off the power.

[0035] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A soaking annealing furnace, characterized in that: The invention comprises a furnace body (1); a cavity (3) is arranged inside the furnace body (1); a heat insulating layer is arranged between the furnace body (1) and the cavity (3); heating elements (4) are embedded in the four sides and the top surface of the cavity (3); a plurality of temperature measuring elements (5) are arranged in the cavity (3); and a sample support frame (7) is arranged at the bottom of the cavity (3); The furnace body (1) and the cavity (3) are both provided with a plurality of holes to facilitate the sealed insertion of the temperature measuring element (5) into the cavity (3); The thermal insulation layer comprises an air layer (2) and a thermal insulation layer (10); the thermal insulation layer (10) is attached to the cavity, and the air layer (2) is located between the thermal insulation layer (10) and the furnace body (1).

2. A soaking annealing furnace according to claim 1, characterized in that: A fan (6) is provided on the outer wall of the furnace body (1), and the fan (6) is in communication with the heat insulation layer.

3. A soaking annealing furnace according to claim 1, characterized in that: The bottom surface of the furnace body (1) is connected to a base, and a liquid crystal display (8) and a plurality of PID controllers (9) are arranged on the side surface of the base.

4. The soaking annealing furnace according to claim 1, characterized in that: The cavity (3) is made of a refractory material, and the refractory material is a high-temperature resistant mullite refractory material.

5. The soaking annealing furnace according to claim 1, characterized in that: The sample support frame (7) is made of refractory material.

6. The soaking annealing furnace according to claim 1, characterized in that: The heating element (4) is a silicon carbon rod.

7. The soaking annealing furnace according to claim 1, characterized in that: The temperature measuring elements (5) are thermocouples, the number of which is ≥5.

8. The soaking annealing furnace according to claim 1, characterized in that: Each group of heating elements (4) is connected to a temperature measuring element (5) at a corresponding position and is controlled by a PID controller (9).

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