Temperature field monitoring and calibrating device for normal-pressure sintering furnace

Abstract

The utility model relates to the technical field of temperature monitoring and calibrating devices, and discloses a normal pressure sintering furnace temperature field monitoring and calibrating device which comprises a thermocouple device connecting flange plate, the thermocouple device connecting flange plate is connected with the side wall of a sintering furnace cavity, and temperature measuring thermocouples are evenly arranged on the thermocouple device connecting flange plate. Temperature measuring thermocouple supports are evenly arranged on the rear side of the side wall of the sintering furnace cavity and support a temperature measuring thermocouple, the temperature measuring thermocouple is connected with the lifting sintering furnace table, and the connecting point of the temperature measuring thermocouple and the lifting sintering furnace table is a temperature measuring end point of the temperature measuring thermocouple. The system has the advantages that the temperature change of the sintering furnace table in the sintering process can be monitored in real time, and abnormal fluctuation of a sintering temperature field can be conveniently adjusted and treated in time.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature monitoring and calibration devices, in particular to a temperature field monitoring and calibration device for a normal pressure sintering furnace. Background Art

[0002] Sintering furnace is a device made of refractory materials used for sintering products. It is an essential facility for ceramic production. Since entering the technological society, sintering furnace equipment has also undergone various optimization and improvement. As an important physical condition for sintering, physical fields such as temperature field and gas field play a vital role in the sintering yield of ceramic devices, especially for large-sized ceramic devices.

[0003] Sintering furnaces generally heat ceramic blanks to make them dense by radiating heat from a single or multiple heating wires / heating rods. For multi-heating wire kiln systems, the factors affecting the temperature field are complex, such as coupled radiation field between heating wires, boundary effects, gas fields, etc. Complex influencing factors can easily cause uneven heating in the sintering area, which in turn causes undesirable effects such as fracture of the sintered ceramics. The temperature measuring block can only display the changes in thermal shrinkage after the entire sintering process, and cannot grasp the changes in temperature at different positions of the support plate during the sintering process in real time. Utility Model Content

[0004] 1. Technical Problems Solved

[0005] The technical problem to be solved by the utility model is that the temperature of the heating wire of the sintering furnace cannot be effectively calibrated in the existing sintering furnace, and the yield rate cannot be effectively guaranteed.

[0006] 2. Technical Solution

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions: a temperature field monitoring and calibration device for a pressureless sintering furnace, comprising a thermocouple device connected to a flange plate,

[0008] The thermocouple device connecting flange plate is connected to the side wall of the sintering furnace chamber, and temperature measuring thermocouples are evenly arranged on the thermocouple device connecting flange plate. Temperature measuring thermocouples are evenly arranged on the rear side of the side wall of the sintering furnace chamber. The temperature measuring thermocouple supports are used to support the temperature measuring thermocouples. The temperature measuring thermocouples are connected to the lifting sintering furnace table, and the connection point between the temperature measuring thermocouple and the lifting sintering furnace table is the temperature measuring end point of the temperature measuring thermocouple.

[0009] Furthermore, the connection flange plate of the thermocouple device is evenly provided with stepped positioning holes, and positioning bolts are arranged in the stepped positioning holes, and the positioning bolts are threadedly connected to the side wall of the sintering furnace chamber.

[0010] Furthermore, a threaded connection portion is provided on the portion of the temperature measuring thermocouple exposed from the front side of the connecting flange plate of the thermocouple device, and a positioning nut is threadedly connected to the threaded connection portion.

[0011] Furthermore, the connection between the back side of the flange plate connected to the thermocouple device and the temperature measuring thermocouple is provided with thermal insulation rock wool inside the flange plate.

[0012] Furthermore, a sintering furnace side wall insulation rock wool is provided at the connection between the internal insulation rock wool of the flange plate and the side wall of the sintering furnace chamber.

[0013] Furthermore, the temperature measuring thermocouple is connected to the paperless recorder via a connecting line.

[0014] 3. Beneficial Effects

[0015] The advantages of the utility model compared with the prior art are:

[0016] By adopting a side-connected temperature measuring thermocouple combination and measuring the actual temperature of different sintering areas in the temperature field, the temperature setting of the sintering furnace heating wire can be effectively corrected, thereby realizing precise control of the sintering process temperature. The method is simple and easy to assemble. At the same time, unlike the temperature measuring block that determines the actual sintering temperature by shrinkage after sintering, this device method can monitor the temperature changes of the corners of the sintering area during the sintering process in real time, so as to be able to respond to abnormal fluctuations in the sintering temperature field in a timely manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model.

[0018] Figure 2 It is the right view of the utility model.

[0019] Figure 3 It is a structural schematic diagram of the thermal coupling device connecting the flange plate of the utility model.

[0020] Figure 4 It is a schematic diagram of the connection between the flange plate of the thermocouple device of the utility model and the side wall of the sintering furnace chamber.

[0021] Figure numerals: 1. flange plate for connecting thermocouple device, 2. side wall of sintering furnace chamber, 3. temperature measuring thermocouple, 4. support for temperature measuring thermocouple, 5. lifting sintering furnace table, 6. temperature measuring end point of temperature measuring thermocouple, 7. stepped positioning hole, 8. positioning bolt, 9. threaded connection part, 10. positioning nut, 11. thermal insulation rock wool inside flange plate, 12. thermal insulation rock wool on side wall of sintering furnace. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present utility model are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present utility model.

[0023] It should be noted that all directional indications such as up, down, left, right, front, back... in the embodiments of the utility model are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0024] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0025] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0026] The utility model will now be further described in conjunction with the accompanying drawings.

[0027] Embodiment 1

[0028] Combined with Figure 1-4 The thermocouple device connection flange plate 1 is connected to the sintering furnace chamber side wall 2, and the thermocouple device connection flange plate 1 is evenly provided with temperature measuring thermocouples 3. The rear side of the sintering furnace chamber side wall 2 is evenly provided with temperature measuring thermocouple supports 4, and the temperature measuring thermocouple supports 4 support the temperature measuring thermocouple 3. The temperature measuring thermocouple 3 is connected to the lifting sintering furnace platform 5. The connection point between the temperature measuring thermocouple 3 and the lifting sintering furnace platform 5 is the temperature measuring end point 6 of the temperature measuring thermocouple. The thermocouple device connection flange plate 1 is evenly provided with stepped positioning holes 7, and the stepped A positioning bolt 8 is provided in the positioning hole 7, and the positioning bolt 8 is threadedly connected to the side wall 2 of the sintering furnace chamber. A threaded connection part 9 is provided on the part of the temperature measuring thermocouple 3 exposed from the front side of the thermocouple device connecting flange plate 1, and a positioning nut 10 is threadedly connected to the threaded connection part 9. An internal insulation rock wool 11 is provided at the connection between the back side of the thermocouple device connecting flange plate 1 and the temperature measuring thermocouple 3, and a sintering furnace side wall insulation rock wool 12 is provided at the connection between the internal insulation rock wool of the flange plate 11 and the side wall 2 of the sintering furnace chamber.

[0029] The thermocouple device connecting flange plate 1 is fixed on the sintering furnace by means of positioning bolts 8;

[0030] The temperature measuring thermocouple 3 is installed and fixed on the thermocouple device connecting flange plate 1 through the threaded connection part 9 and the positioning nut 10 from the inside of the sintering furnace chamber;

[0031] The temperature measuring thermocouple 3 is connected to an external temperature paperless recorder to record the temperature change of the measuring point in real time;

[0032] Lift the lifting sintering furnace table 5 so that the temperature measuring end point 6 of the temperature measuring thermocouple contacts the lifting sintering furnace table 5;

[0033] Turn on the sintering furnace thermostat to gradually increase the temperature and calibrate the temperature. For the temperature measurement process, the temperature can be set from low to high according to the sintering process temperature curve. For each temperature point, after the temperature of the thermostat is stable, observe and record the temperature displayed on the temperature paperless recorder. For a control system with multiple heating wires, the temperature settings of different heating wires can be adjusted to make the temperatures of different temperature measurement points in the temperature field consistent or to achieve a positive or negative temperature difference of 5°C, so as to obtain a uniform temperature setting for the temperature field;

[0034] After the temperature calibration is completed, if there is no need to monitor the sintering temperature changes in real time, the thermocouple assembly device can be removed and the temperature measurement flange plate can be replaced with a blind flange. Similarly, rock wool of suitable size is bound inside the blind flange to achieve thermal insulation effect for the chamber.

[0035] Embodiment 2

[0036] On the basis of Example 1, after the temperature field calibration is completed, if it is necessary to monitor the temperature of the sintering process in real time, a side-connected thermocouple combination device can be designed separately. The difference from Example 1 is that the temperature measurement arrangement of this device avoids the sintering sample placement area such as the center of the furnace, and the temperature of the corners of the temperature field is measured and monitored in real time.

[0037] The thermocouple device connecting flange plate 1 is fixed on the sintering furnace by means of positioning bolts 8;

[0038] The temperature measuring thermocouple 3 is installed and fixed on the thermocouple device connecting flange plate 1 through the threaded connection part 9 and the positioning nut 10 from the inside of the sintering furnace chamber;

[0039] The temperature measuring thermocouple 3 is connected to an external temperature paperless recorder to record the temperature change of the measuring point in real time;

[0040] Lift the lifting sintering furnace table 5 so that the temperature measuring end point 6 of the temperature measuring thermocouple contacts the lifting sintering furnace table 5;

[0041] Turn on the sintering furnace temperature controller, set the sintering temperature, heating rate, holding time, etc. according to the sintering process temperature curve, and observe the temperature changes of each monitoring point of the temperature paperless recorder. If the temperatures of different measuring points in the temperature field are consistent or the temperature difference is plus or minus 5°C, the temperature field is basically uniform and normal; if there is a large temperature difference between the monitoring points, it is necessary to check the heating wire, heating wire thermocouple, and monitoring thermocouple combination to determine the cause of the abnormality.

[0042] The utility model and its implementation are described, and such description is not restrictive. The drawings are only one of the implementations of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention of the utility model, they can design a structure and implementation example similar to the technical solution without creativity, which should belong to the protection scope of the utility model.

Claims

1. A temperature field monitoring and calibration device for a pressureless sintering furnace, comprising a thermocouple device connected to a flange plate (1), characterized in that: The thermocouple device connecting flange plate (1) is connected to the sintering furnace chamber side wall (2), and temperature measuring thermocouples (3) are evenly arranged on the thermocouple device connecting flange plate (1). The rear side of the sintering furnace chamber side wall (2) is evenly provided with temperature measuring thermocouple supports (4), and the temperature measuring thermocouple supports (4) support the temperature measuring thermocouple (3). The temperature measuring thermocouple (3) is connected to the lifting sintering furnace platform (5), and the connection point between the temperature measuring thermocouple (3) and the lifting sintering furnace platform (5) is the temperature measuring end point (6) of the temperature measuring thermocouple.

2. The temperature field monitoring and calibration device for a pressureless sintering furnace according to claim 1, characterized in that: The thermocouple device connecting flange plate (1) is evenly provided with stepped positioning holes (7), and positioning bolts (8) are arranged in the stepped positioning holes (7). The positioning bolts (8) are threadedly connected to the sintering furnace chamber side wall (2).

3. The temperature field monitoring and calibration device for a pressureless sintering furnace according to claim 1, characterized in that: A threaded connection portion (9) is provided on the portion of the temperature measuring thermocouple (3) exposed from the front side of the thermocouple device connecting flange plate (1), and a positioning nut (10) is threadedly connected to the threaded connection portion (9).

4. The temperature field monitoring and calibration device for a pressureless sintering furnace according to claim 1, characterized in that: The connection point between the back side of the flange plate (1) and the temperature measuring thermocouple (3) is provided with thermal insulation rock wool (11) inside the flange plate.

5. The temperature field monitoring and calibration device for a pressureless sintering furnace according to claim 4, characterized in that: The connection between the thermal insulation rock wool inside the flange plate (11) and the side wall (2) of the sintering furnace chamber is provided with thermal insulation rock wool (12) for the side wall of the sintering furnace.

6. The temperature field monitoring and calibration device for a pressureless sintering furnace according to claim 1, characterized in that: The temperature measuring thermocouple (3) is connected to the paperless recorder via a connecting line.

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