A temperature measurement system for materials inside a roller kiln; roller kiln

Abstract

This utility model provides a temperature measurement system for materials inside a roller kiln, relating to the field of roller kiln technology, to solve the technical problem of easy oxidation of high-temperature material cores during material discharge. The temperature measurement system includes a base, a control device, a rotating disk, and at least one temperature measuring device disposed below the rotating disk. A drive mechanism is provided on the base to drive the rotating disk to rotate on the base. The temperature measuring device is a rod-shaped component extending vertically, with a temperature probe at one end opposite the rotating disk, and the other end communicatively connected to the control device. The rotating disk is circular, and the temperature measuring device is radially positioned near the edge of the rotating disk. When the temperature of the material measured by the temperature measuring device reaches a preset threshold, the control device controls the drive mechanism to start, causing the rotating disk to rotate. The preset threshold is greater than or equal to a first temperature and less than or equal to a second temperature, where the first temperature is the oxidation temperature of the material. This temperature measurement system effectively prevents oxidation of the high-temperature material cores during discharge.

Description

Technical Field

[0001] This utility model relates to the field of roller kiln technology, and in particular to a temperature measurement system for materials inside a roller kiln and a roller kiln. Background Technology

[0002] Currently, roller kilns mainly consist of an inlet replacement chamber, an outlet replacement chamber, a firing zone, and a cooling zone. The inlet and outlet replacement chambers function to introduce nitrogen gas for replacement, thus preventing air from entering the roller kiln. The firing zone is electrically heated by heating wires and protected by an inert atmosphere. After entering the firing zone, the material reacts in a high-temperature environment. After the reaction is completed in the firing zone, the material enters the cooling zone for cooling treatment. This is to prevent the material from reacting with oxygen in the air due to excessively high temperature after discharge, thus avoiding the formation of byproducts. To ensure effective temperature control during the firing process and to monitor the temperature of the material in the cooling zone, a temperature measuring device needs to be inserted from the top or side of the furnace to measure the temperature inside the furnace cavity.

[0003] When sintering materials requiring an inert atmosphere in a roller kiln, the material must be placed in a sagger for sintering. In related technologies, due to the large thickness of the material buildup inside the sagger, only the temperature inside the furnace cavity can be monitored, not the temperature of the material inside the sagger. Excessive material buildup can lead to an overestimation of the temperature at the center of the material inside the sagger. During material discharge, the core material comes into contact with air; if the core temperature is too high, it will react with oxygen to generate byproducts, thereby reducing product performance. Utility Model Content

[0004] The purpose of this invention is to provide a temperature measurement system for materials inside a roller kiln, and a roller kiln in order to solve the technical problem that the high-temperature core material inside the sagger is easily oxidized by contact with oxygen.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] In a first aspect, this utility model provides a temperature measurement system for materials inside a roller kiln, including a base, a control device, a rotating disk, and at least one temperature measurement device disposed below the rotating disk; the material is contained in a sagger inside the roller kiln.

[0007] The base is provided with a driving mechanism, which is connected to the rotating disk in a transmission manner. The driving mechanism is used to drive the rotating disk to rotate on the base.

[0008] The temperature measuring device is a rod-shaped component extending vertically. A temperature measuring probe is provided at one end of the temperature measuring device away from the rotating disk, and the other end is communicatively connected to the control device.

[0009] The rotating disk is circular, and the temperature measuring device is arranged radially near the edge of the rotating disk;

[0010] When the temperature of the material measured by the temperature measuring device reaches a preset threshold, the control device controls the drive mechanism to start so that the rotating disk rotates; wherein the preset threshold is greater than or equal to a first temperature and less than or equal to a second temperature, and the first temperature is the oxidation temperature of the material.

[0011] According to at least one embodiment of the present invention, the number of temperature measuring devices is multiple, and they are evenly distributed along the circumference of the rotating disk.

[0012] According to at least one embodiment of the present invention, the temperature measuring system further includes a frame and a linear motion mechanism disposed on the frame, and the control device is communicatively connected to the linear motion mechanism;

[0013] The moving end of the linear motion mechanism is connected to the base, and the linear motion mechanism is used to drive the base to move back and forth in the vertical direction.

[0014] According to at least one embodiment of the present invention, the linear motion mechanism is one of a hydraulic cylinder, a pneumatic cylinder, an electric cylinder, or a lead screw transmission mechanism.

[0015] According to at least one embodiment of the present invention, a guide mechanism is further provided between the base and the frame.

[0016] The guiding mechanism includes a guide rail and a slider that cooperates with the guide rail. The slider is fixedly connected to the base, and the guide rail is mounted on the frame.

[0017] According to at least one embodiment of the present invention, the top edge of the base has an upwardly protruding flange structure that extends circumferentially along the base and is used to prevent metal fragments from falling into the material.

[0018] According to at least one embodiment of the present invention, the temperature measuring device includes an armored thermocouple, which is used to extend into the interior of the crucible and directly contact the material.

[0019] Secondly, this utility model provides a roller kiln, including the temperature measurement system for materials inside the roller kiln described in the first aspect.

[0020] The roller kiln also includes a kiln body and a conveying device disposed within the kiln body. The conveying device is used to carry and transport saggers containing the material. The conveying device is communicatively connected to the control device.

[0021] According to at least one embodiment of the present invention, when the temperature measuring device detects that the material in the sagger is above the second temperature, the control device adjusts the operating speed of the conveying device to extend the residence time of the material in the cooling zone of the kiln.

[0022] According to at least one embodiment of the present invention, when the temperature measuring device detects that the material in the sagger is below the first temperature, the control device adjusts the operating speed of the conveying device to keep it constant.

[0023] In one or more technical solutions provided in the exemplary embodiments of this utility model, at least one of the following beneficial effects can be achieved.

[0024] The exemplary embodiment of this utility model discloses a temperature measurement system for materials inside a roller kiln, comprising a base, a control device, a rotating disk, and at least one temperature measuring device disposed below the rotating disk. A drive mechanism is mounted on the base and is connected to the rotating disk via a transmission connection. The control device is electrically connected to the drive mechanism and is used to control the rotation of the rotating disk on the base. The temperature measuring device can extend into the inside of the kiln to directly measure the temperature of the material, thereby obtaining the real-time core temperature of the material. When the temperature of the material measured by the temperature measuring device reaches a preset threshold, the preset threshold is greater than or equal to a first temperature and less than or equal to a second temperature. The first temperature is the oxidation temperature of the material, meaning that when the core temperature of the material is higher than or reaches this value, it will react with oxygen. Since the preset threshold is less than or equal to the second temperature, meaning the preset threshold temperature is slightly high but not excessive, appropriate light stirring can achieve the cooling and removal of the material core, thereby preventing oxidation reactions during discharge, avoiding the generation of by-products, and improving product quality. Based on this, the temperature measurement system for materials in a roller kiln of the exemplary embodiment of this utility model can measure the center temperature of the material in the sagger, and at the same time adjust the rotation of the rotating disk through the control device to turn the material core within the preset threshold range to the surface for cooling treatment, thereby effectively avoiding oxidation reaction when the high temperature material core comes into contact with oxygen during the discharge process. Attached Figure Description

[0025] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention and are incorporated in and constitute a part of this specification.

[0026] Figure 1 This is a schematic diagram of the structure of a roller kiln according to an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the structure of a roller kiln according to another embodiment of the present invention.

[0028] Figure label:

[0029] 10. Rotary disk; 11. Temperature measuring device; 12. Drive mechanism; 13. Base; 131. Flange structure;

[0030] 20. Sagger;

[0031] 30. Linear motion mechanism;

[0032] 40. Rack. Detailed Implementation

[0033] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0034] Example 1

[0035] Figure 1 This is a schematic diagram of the structure of a roller kiln according to an embodiment of the present invention. Figure 1 As shown, the temperature measurement system for materials inside a roller kiln provided in the exemplary embodiment of this utility model includes a linear motion mechanism 30, a rotating disk 10, a temperature measuring device 11, and a control device. The linear motion mechanism 30 is mounted on the frame 40 and is used to drive the rotating disk 10 to move up and down along the vertical direction of the roller kiln.

[0036] The roller kiln, along the conveying direction of the transmission device, sequentially includes an inlet replacement chamber, a firing zone, a cooling zone, and an outlet replacement chamber. When sintering materials requiring inert atmosphere protection in the roller kiln, the material must be loaded into saggers 20 for sintering. That is, each sagger 20 passes through its respective functional zone sequentially with the transmission device, completing high-temperature sintering in the firing zone before entering the cooling zone. A temperature measuring device 11 is installed in the cooling zone within the kiln. When a sagger 20 is conveyed to a position below the temperature measuring device 11, the device moves downwards under the drive of the linear motion mechanism 30, inserting itself into the material within the sagger 20 to monitor the core temperature of the material in real time. The temperature measuring device 11 transmits the collected temperature signal to the control device. After collecting the core temperature of the material within the sagger 20, the control device controls the linear motion mechanism 30 to move the temperature measuring device 11 upwards, detaching it from the sagger 20.

[0037] Compared to existing technologies that require inserting a temperature measuring device from the top or side of the furnace to test the temperature inside the furnace cavity in order to ensure temperature control and monitor the temperature of the material in the cooling zone during the firing process, this invention directly inserts the temperature measuring device 11 into the inside of the sagger 20 to achieve accurate measurement of the core temperature of the material. This avoids the problem of the core temperature of the material being too high due to a large difference between the furnace cavity temperature and the actual temperature of the material, which leads to the oxidation reaction generating by-products during discharge and thus reducing product performance.

[0038] Example 2

[0039] Figure 2 This is a schematic diagram of the structure of a roller kiln according to another embodiment of the present invention. Figure 2 As shown in the exemplary embodiment of this utility model, the temperature measurement system for materials inside a roller kiln includes not only the linear motion mechanism 30, rotating disk 10, temperature measuring device 11, and control device as in Embodiment 1, but also a drive mechanism 12 and a base 13. The drive mechanism 12 is connected to the rotating disk 10 and is used to drive the rotating disk 10 to rotate. The base 13 is provided with a flange structure 131. When the sagger 20 is transferred to the temperature measurement station, the linear motion mechanism 30 drives the temperature measuring device 11 to descend, allowing the temperature measuring device 11 to smoothly insert into the center position of the sagger 20, ensuring that the temperature probe is in full contact with the material, and improving the temperature measurement accuracy and stability. After the temperature measurement is completed, the control device controls the drive mechanism 12 to reset according to the preset program instructions, and the linear motion mechanism 30 drives the temperature measuring device 11 to rise to a safe height to avoid interference with the moving sagger 20.

[0040] In practical applications, there are multiple temperature measuring devices 11, which are evenly distributed along the circumference of the rotating disk 10. For example, there can be three or two. When there are two temperature measuring devices 11, the two temperature measuring devices 11 are symmetrically arranged on the rotating disk 10 to ensure the balance of the center of gravity and reduce operating vibration. When there are three temperature measuring devices 11, they are evenly distributed at 120° to improve system stability.

[0041] When the temperature of the material measured by the temperature measuring device 11 reaches the preset threshold, the preset threshold is greater than or equal to the first temperature and less than or equal to the second temperature. The first temperature is the oxidation temperature of the material, that is, when the core temperature of the material reaches or exceeds the first temperature, it will react with oxygen. The preset threshold is less than or equal to the second temperature, that is, the preset threshold temperature is too high but not too high. By appropriately stirring, the core of the material can be turned out and cooled down, thereby achieving the purpose of preventing oxidation reaction when discharging, avoiding the generation of by-products, and improving product quality.

[0042] In practical applications, the temperature measuring device 11 uses a high-temperature resistant and corrosion-resistant armored thermocouple. Its probe tip undergoes special encapsulation to ensure long-term stable operation in high-temperature environments. Multiple temperature measuring devices 11 are eccentrically positioned at the bottom of the rotating disk 10. These rods, extending vertically, act as stirring components. After temperature measurement, when the material temperature reaches a preset threshold, the control device activates the drive mechanism 12, such as a motor, to slightly rotate the rotating disk 10, causing the temperature measuring devices 11 to gently agitate the material. This allows the material in the high-temperature zone to diffuse outwards, achieving localized cooling and effectively preventing oxidation reactions caused by localized overheating during discharge. The control device precisely adjusts the rotation angle and duration to ensure moderate agitation intensity, achieving cooling without damaging the material structure. The entire temperature measurement and stirring process is automated, significantly improving the stability and product consistency of continuous roller kiln operation.

[0043] In some embodiments, when the temperature measuring device 11 detects that the material in the sagger 20 is below a first temperature, the control device adjusts the operating speed of the conveying device to remain constant. That is, the core temperature of the material has not yet reached the critical point of oxidation reaction, and no stirring intervention is required. At this time, the control device controls the linear motion structure to drive the temperature measuring device 11 to rise and reset, while the rotating disk 10 remains stationary. The system enters standby mode, waiting for the next temperature measurement command. At this time, the conveying device runs smoothly at a preset speed to ensure normal material discharge.

[0044] In some embodiments, when the temperature measuring device 11 detects that the material in the sagger 20 is above the second temperature, the control device adjusts the operating speed of the conveying device to prolong the residence time of the material in the cooling zone of the kiln.

[0045] Specifically, when the temperature measuring device 11 detects that the material inside the crucible 20 exceeds the second temperature, meaning the core temperature of the material has exceeded the safe upper limit and cannot be cooled down by gentle stirring, the control device immediately adjusts the transmission device to reduce its operating speed until it reaches zero. This allows the material to remain in the cooling zone for a longer time, enhancing the heat dissipation effect. Simultaneously, the auxiliary cooling device is activated to enhance convective heat dissipation, ensuring that the material temperature drops to a safe range before discharge. Once the temperature falls below the first temperature, the control device restarts the transmission device, restores the preset operating speed, and executes a new round of temperature measurement and control cycle to ensure stable and reliable discharge. The entire process is monitored in real time and responds dynamically, effectively avoiding material performance degradation caused by high temperatures and ensuring production continuity and product quality consistency.

[0046] When the temperature measuring device 11 detects that the material temperature is between the first and second temperatures, the control device determines it to be in a transitional state and activates the pre-intervention mechanism. It drives the rotating disk 10 to rotate slightly, causing the temperature measuring device 11 to gently disturb the material and promote uniform heat dissipation. After the temperature measuring device 11 collects data again and confirms that the temperature is below the first temperature, the control device controls the rotating disk 10 to reset. The linear motion structure lifts the temperature measuring device 11 to its initial position, and the system returns to standby mode. The conveying device resumes its preset speed, and the material continues to be conveyed forward, entering the next monitoring cycle.

[0047] For example, the linear motion mechanism 30 is one of a hydraulic cylinder, a pneumatic cylinder, an electric cylinder, or a lead screw transmission mechanism.

[0048] For example, the rotary disk 10 is driven by a servo motor and uses a high-precision encoder to achieve closed-loop angle control.

[0049] For example, a guide mechanism is also provided between the base 13 and the frame 40. The guide mechanism includes a guide rail and a slider that cooperates with the guide rail. The slider is fixedly connected to the base 13, and the guide rail is set on the frame 40. The guide mechanism ensures that the temperature measuring device 11 operates smoothly during linear motion, avoiding deviation in the temperature measuring position due to off-center load or vibration. The servo motor responds to control commands to start and stop quickly, and precisely adjusts the rotation angle of the rotating disk 10, ensuring the controllability and repeatability of disturbance operation.

[0050] When used as a linear drive unit, the hydraulic cylinder has a self-locking function, enabling it to hover stably at a designated position and improving structural rigidity during temperature measurement and intervention. The entire system uses a PLC to centrally coordinate the timing of the actions of each actuator, achieving intelligent closed-loop control of the cooling process.

[0051] In some implementations, such as Figure 2 As shown, the top edge of the base 13 has an upwardly protruding flange structure 131, which extends circumferentially along the base 13. The flange structure 131 is used to prevent metal fragments from falling into the material. Specifically, the height of the flange structure 131 is not less than 5mm. During the rotation of the rotating disk 10 and the lifting and lowering of the temperature measuring device 11, the flange structure 131 effectively blocks metal debris generated by the wear of the upper frame 40, preventing impurities from contaminating the material and ensuring product purity. The surface of the flange structure 131 is passivated to enhance wear resistance and corrosion resistance, making it less prone to scale buildup during long-term operation and facilitating cleaning and maintenance.

[0052] In some embodiments, the temperature measuring device 11 includes an armored thermocouple that extends into the crucible 20 and comes into direct contact with the material. Specifically, the armored thermocouple uses a high-temperature resistant alloy sheath, enabling it to operate stably for extended periods at temperatures above 800°C. Its measuring end undergoes a special encapsulation process, resulting in a fast response and a measurement accuracy of ±1.5°C. The thermocouple signal is transmitted to the PLC analog input module via a shielded cable, effectively suppressing electromagnetic interference and ensuring reliable temperature data. During insertion into the crucible 20, the armored structure has strong bending resistance, preventing damage to the probe due to material stacking resistance. After temperature measurement, the armored thermocouple retracts smoothly, avoiding damage caused by scratching against the edge of the crucible 20. The insertion depth of the thermocouple is precisely controlled by the PLC program, ensuring consistent measurement positions and improving data comparability. A flexible protective sleeve is added to the outer layer of the shielded cable to adapt to reciprocating motion requirements and extend its service life.

[0053] Example 3

[0054] An exemplary embodiment of this utility model also provides a roller kiln, including the temperature measurement system for materials inside the roller kiln as described in Embodiment 2. The roller kiln also includes a kiln body and a conveying device disposed inside the kiln body. The conveying device is used to carry and transport the sagger 20 containing the materials. The conveying device is communicatively connected to the control device.

[0055] The roller kiln is divided into a preheating zone, a firing zone, and a cooling zone along its length. The temperature of each zone is independently controllable, meeting the requirements of segmented heat treatment processes for materials. The conveying device uses a high-temperature resistant chain and guide rails to smoothly transport the sagger 20 through each temperature zone. The operating speed is dynamically adjusted by the PLC according to the process settings. The temperature measurement system acquires the core temperature of the material in real time and feeds it back to the control device.

[0056] Compared to existing technologies, the advantages of the roller kiln in the exemplary embodiment of this utility model are the same as those of the temperature measurement system for materials inside the roller kiln, and will not be repeated here.

[0057] Those skilled in the art should understand that the above embodiments are merely for clearly illustrating the present invention and are not intended to limit the scope of the present invention. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of the present invention.

Claims

1. A temperature measurement system for materials inside a roller kiln, characterized in that, It includes a base, a control device, a rotating disk, and at least one temperature measuring device disposed below the rotating disk; the material is contained in a sagger inside the roller kiln; The base is provided with a driving mechanism, which is connected to the rotating disk in a transmission manner. The driving mechanism is used to drive the rotating disk to rotate on the base. The temperature measuring device is a rod-shaped component extending vertically. A temperature measuring probe is provided at one end of the temperature measuring device away from the rotating disk, and the other end is communicatively connected to the control device. The rotating disk is circular, and the temperature measuring device is arranged radially near the edge of the rotating disk; When the temperature of the material measured by the temperature measuring device reaches a preset threshold, the control device controls the drive mechanism to start so that the rotating disk rotates; wherein the preset threshold is greater than or equal to a first temperature and less than or equal to a second temperature, and the first temperature is the oxidation temperature of the material.

2. The temperature measurement system for materials inside a roller kiln according to claim 1, characterized in that, The temperature measuring devices are multiple and are evenly distributed along the circumference of the rotating disk.

3. The temperature measurement system for materials inside a roller kiln according to claim 1, characterized in that, The temperature measurement system also includes a frame and a linear motion mechanism mounted on the frame, and the control device is communicatively connected to the linear motion mechanism. The moving end of the linear motion mechanism is connected to the base, and the linear motion mechanism is used to drive the base to move back and forth in the vertical direction.

4. The temperature measurement system for materials inside a roller kiln according to claim 3, characterized in that, The linear motion mechanism is one of a hydraulic cylinder, a pneumatic cylinder, an electric cylinder, or a lead screw transmission mechanism.

5. The temperature measurement system for materials inside a roller kiln according to claim 3, characterized in that, A guide mechanism is also provided between the base and the frame. The guiding mechanism includes a guide rail and a slider that cooperates with the guide rail. The slider is fixedly connected to the base, and the guide rail is mounted on the frame.

6. The temperature measurement system for materials inside a roller kiln according to claim 3, characterized in that, The top edge of the base has an upwardly protruding flange structure that extends circumferentially along the base and is used to prevent metal fragments from falling into the material.

7. The temperature measurement system for materials inside a roller kiln according to claim 6, characterized in that, The temperature measuring device includes an armored thermocouple, which is used to extend into the inside of the crucible and come into direct contact with the material.

8. A roller kiln, characterized in that, Including the temperature measurement system for materials inside a roller kiln as described in any one of claims 1-7, The roller kiln also includes a kiln body and a conveying device disposed within the kiln body. The conveying device is used to carry and transport saggers containing the material. The conveying device is communicatively connected to the control device.

9. The roller kiln according to claim 8, characterized in that, When the temperature measuring device detects that the material in the sagger is above the second temperature, the control device adjusts the operating speed of the conveying device to extend the residence time of the material in the cooling zone of the kiln.

10. The roller kiln according to claim 9, characterized in that, When the temperature measuring device detects that the material in the sagger is below the first temperature, the control device adjusts the operating speed of the conveying device to keep it constant.

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