Calibration device for box resistance furnace

Abstract

The utility model relates to resistance furnace calibration technical field especially, relate to box type resistance furnace calibration device, including the sealed furnace door hinged on resistance furnace body, the four corners and middle part of sealed furnace door all install heat -insulating sleeve, install sealed stop valve on heat -insulating sleeve, and the outer end of four corners and middle part heat -insulating sleeve is respectively provided with the clamping ring cover no.

Description

Technical Field

[0001] This utility model relates to the field of resistance furnace calibration technology, and in particular to a box-type resistance furnace calibration device. Background Technology

[0002] Box-type resistance furnaces are a common type of high-temperature heating equipment, widely used in laboratories and industrial production for heat treatment, sintering, and melting of materials. To ensure accurate, stable, and reliable temperature control of the box-type resistance furnace, thereby guaranteeing process quality and the authenticity of experimental data, it is necessary to calibrate its internal temperature.

[0003] Traditional calibration methods for box-type resistance furnaces primarily rely on manual operation. During calibration, staff must frequently open the high-temperature furnace door and manually adjust the thermocouple positions to collect temperature data at different points. This method has several drawbacks: Firstly, frequent opening of the high-temperature furnace door exposes operators directly to the high-temperature environment, posing safety hazards such as burns and scalds. Secondly, the moment the furnace door is opened, the internal temperature drops sharply by 10-20°C. By the time the thermocouple positions are adjusted and measurements begin, the actual internal temperature has deviated from the set value, making the calibration data unable to accurately reflect the furnace's temperature control capability under stable operating conditions. Furthermore, traditional calibration uses a fixed-point layout, making it difficult to comprehensively and dynamically assess the temperature uniformity within the furnace, resulting in limited calibration results. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a box-type resistance furnace calibration device, which solves the technical problems of frequent opening and closing of the furnace door during furnace temperature calibration, which leads to calibration data distortion and safety hazards, and the difficulty of comprehensively and dynamically assessing the uniformity of furnace temperature using fixed temperature measurement points. This device achieves the goal of improving the accuracy of calibration data and comprehensively and dynamically calibrating the uniformity of furnace temperature.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a box-type resistance furnace calibration device, including a sealed furnace door hinged to the resistance furnace body. Insulation sleeves are installed at the four corners and the center of the sealed furnace door. Sealing shut-off valves are installed on the insulation sleeves. A snap-fit ​​ring sleeve one and a snap-fit ​​ring sleeve two are respectively fitted onto the outer ends of the insulation sleeves at the four corners and the center. Temperature measuring sleeves are installed inside the snap-fit ​​ring sleeve one. An edge temperature measuring rod is installed on the snap-fit ​​ring sleeve one, and a center temperature measuring rod is installed on the snap-fit ​​ring sleeve two. A thermocouple one is installed at the end of both the temperature measuring sleeve and the center temperature measuring rod. A thermocouple two is installed at the end of the edge temperature measuring rod. A dynamic temperature measuring component for dynamically measuring the temperature inside the furnace is installed on the center temperature measuring rod. A stabilization component is installed on the snap-fit ​​ring sleeve one to prevent the thermocouple two from shaking and touching the furnace wall.

[0006] A further improvement is that the dynamic temperature measuring component includes a turntable installed on the outer end of the central temperature measuring rod, the central temperature measuring rod has an external thread, the snap ring sleeve has a threaded hole that matches it, and a connecting frame is installed in series between the four edge temperature measuring rods, and the connecting frame is attached to the inner surface of the turntable. A sliding hole that matches the central temperature measuring rod is opened at the intersection center of the connecting frame.

[0007] A further improvement is that the length of the center temperature measuring rod is less than the length of the edge temperature measuring rod, and the edge temperature measuring rod is engraved with a length table.

[0008] A further improvement is that a protective ring is installed at the end of each edge temperature measuring rod, and the protective ring is located outside the second thermocouple.

[0009] A further improvement is that the stabilization component includes connecting rods installed on both sides of the snap ring sleeve, a locking block adapted to the connecting rods is installed on the resistance furnace body, a plug rod slides on the locking block, a handle is installed on the top of the plug rod, and a spring located on the outside of the plug rod is installed between the handle and the locking block.

[0010] A further improvement is that the connecting rod has a locking hole that matches the plug rod, and the bottom of the plug rod has a beveled structure.

[0011] By employing the above technical solution, this utility model provides a box-type resistance furnace calibration device, which has at least the following beneficial effects:

[0012] 1. This utility model uses thermocouple one on the outside of the temperature measuring sleeve and the central temperature measuring rod, together with thermocouple two on the edge temperature measuring rod, to detect the temperature at the center and eight corners inside the resistance furnace body. By comparing the temperature differences of each thermocouple, the internal temperature of the resistance furnace body can be calibrated. This eliminates the need for frequent opening and closing of the sealed furnace door, which would lead to heat loss and distortion of calibration data. This improves the accuracy of the resistance furnace body temperature calibration. Furthermore, calibration can be performed during production without stopping the machine, thus improving production efficiency.

[0013] 2. This utility model uses a rotating turntable to drive the central temperature measuring rod to rotate, causing it to rotate inward along the threaded hole. At this time, the turntable pushes the connecting frame to move, thereby synchronously driving the edge temperature measuring rod to move into the resistance furnace body. During this process, the spatial temperature distribution inside the resistance furnace body at the same time is collected simultaneously, and the temperature uniformity inside the resistance furnace body is evaluated and calibrated. Attached Figure Description

[0014] The accompanying drawings, which are provided to further illustrate this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application.

[0015] In the attached diagram:

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This utility model Figure 1 Enlarged diagram of the split structure at point A;

[0018] Figure 3 This utility model Figure 1 Enlarged diagram of the split structure at point B;

[0019] Figure 4 This is a rear view schematic diagram of the sealed furnace door and its upper structure of this utility model;

[0020] Figure 5 This utility model Figure 4 Enlarged structural diagram at point C;

[0021] Figure 6 This is a schematic diagram of the independent structure of the dynamic temperature measurement component of this utility model.

[0022] In the diagram: 1. Resistance furnace body; 2. Sealed furnace door; 3. Insulation sleeve; 4. Sealed shut-off valve; 5. Snap-fit ​​ring sleeve one; 6. Snap-fit ​​ring sleeve two; 7. Temperature measuring sleeve; 8. Edge temperature measuring rod; 9. Center temperature measuring rod; 101. Thermocouple one; 102. Thermocouple two;

[0023] 11. Dynamic temperature measurement component; 111. Turntable; 112. Connecting bracket;

[0024] 12. Stabilizing component; 121. Linkage rod; 122. Locking block; 123. Connecting rod; 124. Handle; 125. Spring;

[0025] 13. Protective ring. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example 1

[0028] Given that current technologies often suffer from data distortion and safety hazards due to frequent opening and closing of the furnace door during furnace temperature calibration, and that fixed-point temperature measurement methods are insufficient for comprehensively and dynamically assessing furnace temperature uniformity, this embodiment provides a box-type resistance furnace calibration device. This device improves calibration data accuracy and provides comprehensive and dynamic calibration of furnace temperature uniformity. Please refer to... Figures 1-6 The box-type resistance furnace calibration device includes a sealed furnace door 2 hinged to the furnace body 1. Insulation sleeves 3 are installed at the four corners and the center of the sealed furnace door 2. Sealing shut-off valves 4 are installed on the insulation sleeves 3. Clamping ring sleeve 1 5 and clamping ring sleeve 2 6 are respectively fitted onto the outer ends of the insulation sleeves 3 at the four corners and the center. Temperature measuring sleeves 7 are installed inside the clamping ring sleeve 1 5. An edge temperature measuring rod 8 slides on the clamping ring sleeve 1 5. A center temperature measuring rod 9 is installed on the clamping ring sleeve 2 6. Thermocouple 1 101 is installed at the ends of the temperature measuring sleeves 7 and the center temperature measuring rod 9. Thermocouple 2 102 is installed at the end of the edge temperature measuring rod 8. A dynamic temperature measuring component 11 for dynamically measuring the temperature inside the furnace is installed on the center temperature measuring rod 9. A stabilizing component 12 is installed on the clamping ring sleeve 1 5 to prevent the thermocouple 2 102 from shaking and touching the furnace wall.

[0029] When it is necessary to calibrate the internal temperature of the resistance furnace body 1, open the sealing shut-off valve 4, and fit the snap ring sleeve 1 5 and snap ring sleeve 2 6 onto the heat insulation sleeve 3 respectively. At this time, the temperature measuring sleeve 7 on snap ring sleeve 1 5 enters the resistance furnace body 1 through the heat insulation sleeve 3. Thermocouple 101 set on its outer side measures the temperature at four points near the outer side of the resistance furnace body 1. Then, insert the edge temperature measuring rod 8 and the center temperature measuring rod 9 into snap ring sleeve 1 5 and snap ring sleeve 2 6 respectively. The temperature is measured by the thermocouple 101 on the center temperature measuring rod 9 and the temperature of the edge temperature measuring rod 8. The second thermocouple 102 is used to detect the temperature at the center and four inner corners of the resistance furnace body 1, thereby realizing temperature detection at the center point and eight corners of the resistance furnace body 1. By comparing the temperature difference between each thermocouple 101 and the second thermocouple 102, the temperature inside the resistance furnace body 1 can be calibrated. This eliminates the need for frequent opening and closing of the sealed furnace door 2, which would cause a large amount of heat to leak out of the resistance furnace body 1 and distort the calibration data. This improves the accuracy of the temperature calibration of the resistance furnace body 1. Furthermore, calibration can be performed during production without stopping the machine, thus improving production efficiency.

[0030] Example 2

[0031] Because traditional fixed-point stable detection is difficult to comprehensively and dynamically assess the uniformity of furnace temperature, resulting in limitations in calibration results, therefore, based on Example 1, as... Figures 1-6As shown, the device is also equipped with a dynamic temperature measurement component 11. The dynamic temperature measurement component 11 includes a turntable 111 installed on the outer end of the central temperature measuring rod 9. The central temperature measuring rod 9 has an external thread, and the snap ring sleeve 2 6 has a threaded hole that matches it. A connecting frame 112 is installed in series between the four edge temperature measuring rods 8, and the connecting frame 112 is attached to the inner surface of the turntable 111. The connecting frame 112 has a sliding hole that matches the central temperature measuring rod 9 at the intersection center. Rotating the turntable 111 drives the central temperature measuring rod 9 to rotate, so that it rotates along the threaded hole on the snap ring sleeve 2 6 and moves into the resistance furnace body 1. At this time, the turntable 111 pushes the connecting frame 112 to move, thereby synchronously driving the edge temperature measuring rods 8 to move into the resistance furnace body 1. During this process, the spatial temperature distribution inside the resistance furnace body 1 at the same time is collected simultaneously, and the temperature uniformity inside the resistance furnace body 1 is evaluated and calibrated.

[0032] To accurately control the depth of the edge temperature measuring rod 8 and the center temperature measuring rod 9, the length of the center temperature measuring rod 9 in this device is less than the length of the edge temperature measuring rod 8. This allows the thermocouple 101 at the end of the center temperature measuring rod 9 to be positioned at the center of the resistance furnace body 1, while the thermocouple 102 at the end of the edge temperature measuring rod 8 can move to the temperature detection point inside the resistance furnace body 1. The edge temperature measuring rod 8 is engraved with a length gauge, which allows for precise control of the depth of the edge temperature measuring rod 8. This enables targeted adjustments to the resistance furnace body 1 at different depths, preventing excessive movement that could cause the thermocouple 102 to collide with the furnace wall and be damaged.

[0033] To prevent the thermocouple 102 at the end of the edge temperature measuring rod 8 from colliding with the furnace wall and causing damage during movement, a protective ring 13 is installed at the end of each edge temperature measuring rod 8 in this device. The protective ring 13 is located on the outside of the thermocouple 102. The protective ring 13 protects the thermocouple 102 and prevents it from touching the furnace wall and causing damage.

[0034] Example 3

[0035] Because the connecting bracket 112 is installed, its weight is too great. To prevent the device from falling and being damaged, and to prevent the thermocouple from shaking during the calibration of furnace temperature uniformity, which would affect the calibration accuracy, therefore, based on Embodiment 2, as follows... Figures 1-6 As shown, the device also includes a stabilization component 12. The stabilization component 12 includes connecting rods 121 installed on both sides of the snap ring sleeve 5. A locking block 122 adapted to the connecting rods 121 is installed on the resistance furnace body 1. A plug rod 123 slides on the locking block 122. A handle 124 is installed on the top of the plug rod 123. A spring 125 located on the outside of the plug rod 123 is installed between the handle 124 and the locking block 122.

[0036] The connecting rod 121 has a locking hole that matches the plug-in rod 123, and the bottom of the plug-in rod 123 has a beveled structure. During calibration, the snap ring sleeve 1 5 and snap ring sleeve 2 6 are directly aligned with the heat insulation sleeve 3 and sleeved. During this process, the connecting rods 121 on both sides of the snap ring sleeve 1 5 are inserted into the plug-in slots on the locking block 122. During the insertion process, the bottom of the connecting rod 121 pushes the arc-shaped structure at the bottom of the plug-in rod 123, squeezing the plug-in rod 123 upward and compressing the spring 125 until the connecting rod 121 is fully inserted into the plug-in slot on the locking block 122. The plug-in rod 123 and the locking hole on the connecting rod 121 are perpendicular to each other. At this time, the spring 125 returns to its original position under its own elasticity and pushes the plug-in rod 123 into the locking hole, thereby completing the fixation of the calibration device and preventing the connecting frame 112 from shaking and causing the thermocouples to shake, which would affect the dynamic detection and calibration work inside the resistance furnace body 1.

[0037] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A box-type resistance furnace calibration device comprising a sealed furnace door (2) hinged to the resistance furnace body (1), characterized in that: The sealed furnace door (2) is equipped with heat insulation sleeves (3) at its four corners and the middle. A sealing shut-off valve (4) is installed on the heat insulation sleeves (3). The outer ends of the heat insulation sleeves (3) at the four corners and the middle are respectively fitted with snap ring sleeve one (5) and snap ring sleeve two (6). A temperature measuring sleeve (7) is installed on the inner side of snap ring sleeve one (5). An edge temperature measuring rod (8) slides on snap ring sleeve one (5). A center temperature measuring rod (9) is set on snap ring sleeve two (6). A thermocouple one (101) is installed at the end of the temperature measuring sleeve (7) and the center temperature measuring rod (9). A thermocouple two (102) is installed at the end of the edge temperature measuring rod (8). A dynamic temperature measuring component (11) is set on the center temperature measuring rod (9) to dynamically measure the temperature inside the furnace. A stabilizing component (12) is set on snap ring sleeve one (5) to prevent thermocouple two (102) from shaking and touching the furnace wall.

2. A box-type resistance furnace calibration device according to claim 1, characterized by: The dynamic temperature measuring component (11) includes a turntable (111) installed on the outer end of the central temperature measuring rod (9). The central temperature measuring rod (9) has an external thread, and the snap ring sleeve (6) has a threaded hole that matches it. A connecting frame (112) is installed in series between the four edge temperature measuring rods (8), and the connecting frame (112) is attached to the inner surface of the turntable (111). A sliding hole that matches the central temperature measuring rod (9) is opened at the intersection center of the connecting frame (112).

3. A box-type resistance furnace calibration device according to claim 1, characterized in that: The length of the central temperature measuring rod (9) is less than the length of the edge temperature measuring rod (8), and the edge temperature measuring rod (8) is engraved with a length table.

4. A box-type resistance furnace calibration device according to claim 1, characterized by: Each edge temperature measuring rod (8) is equipped with a protective ring (13) at its end, and the protective ring (13) is located outside the thermocouple 2 (102).

5. The box-type resistance furnace calibration device according to claim 1, characterized in that: The stabilization component (12) includes connecting rods (121) installed on both sides of the snap ring sleeve (5), a locking block (122) adapted to the connecting rods (121) is installed on the resistance furnace body (1), a plug rod (123) slides on the locking block (122), a handle (124) is installed on the top of the plug rod (123), and a spring (125) located outside the plug rod (123) is installed between the handle (124) and the locking block (122).

6. A box-type resistance furnace calibration device according to claim 5, characterized in that: The connecting rod (121) has a locking hole that matches the plug rod (123), and the bottom of the plug rod (123) has a sloping structure.

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