Corrosion-resistant thermocouple for high-temperature heater

Abstract

The utility model discloses a corrosion-resistant thermocouple for a high-temperature heater, which comprises a junction box, a mounting pipe arranged in the middle of the lower end of the junction box, a measuring end arranged in the middle of the lower end of the mounting pipe, a reference end arranged in the middle of the top wall of the junction box, and a fixing mechanism, the fixing mechanism comprises fixing rods, an adjusting plate, push plates and a mounting seat, the mounting seat is arranged on the upper side of the outer arc surface of the mounting pipe, the fixing rods are arranged on the upper side in the mounting seat, the adjusting plate is slidably connected to the rear side of the top wall of the mounting seat, and the push plates are arranged on the left side and the right side of the front end of the adjusting plate respectively; according to the corrosion-resistant thermocouple for the high-temperature heater, complex bolt tightening and flange alignment operations are not needed during installation, when replacement or maintenance and overhaul are needed subsequently, the thermocouple can be easily taken out only by loosening the clamping plates, the shutdown time of the high-temperature heater is further shortened, and the service life of the high-temperature heater is prolonged. And the production efficiency of cigarettes is ensured.

Description

Technical Field

[0001] This utility model relates to the technical field of cigarette production equipment, specifically to a corrosion-resistant thermocouple for a high-temperature heater. Background Technology

[0002] In the cigarette production process, high-temperature heaters are used for drying and baking tobacco. These processes typically require precise temperature control. Therefore, corrosion-resistant thermocouples for high-temperature heaters play a crucial role in cigarette production, used for real-time monitoring and control of the temperature within the heater. In the prior art: Authorization Publication No. CN 218584213 U's patent discloses a corrosion-resistant high-temperature thermocouple, including an insulator. A positive and negative thermocouple wire are fixedly connected inside the insulator. An inner sleeve is fixedly connected to the periphery of the insulator, and a protective sleeve is fixedly connected to the periphery of the inner sleeve. An outer replacement sleeve is fitted onto the periphery of the protective sleeve. A wire trough box is fixedly connected to the upper surface of the insulator. While this device can be installed and fixed using bolts and flanges, the flanges require precise alignment before installation, followed by tightening the bolts one by one to ensure a seal. The installation process is complex and time-consuming. Subsequent replacement and maintenance are also difficult due to disassembly, increasing downtime of the high-temperature heater and reducing cigarette production efficiency. Therefore, we propose a corrosion-resistant thermocouple for high-temperature heaters. Utility Model Content

[0003] The technical problem this invention aims to solve is to overcome existing defects and provide a corrosion-resistant thermocouple for high-temperature heaters. This thermocouple can be quickly positioned and installed by clamping, eliminating the need for complex bolt tightening and flange alignment operations, thus greatly shortening installation time. When replacement or maintenance is required, it can be easily removed by simply loosening the clamp, without disassembling the flange and piping system. This further reduces downtime of the high-temperature heater, ensuring the production efficiency of cigarettes and effectively solving the problems in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a corrosion-resistant thermocouple for a high-temperature heater, comprising a junction box, an installation tube provided in the middle of the lower end of the junction box, a measuring end provided in the middle of the lower end of the installation tube, a reference end provided in the middle of the top wall of the junction box, and a fixing mechanism.

[0005] The fixing mechanism includes a fixing rod, an adjusting plate, a push plate, and a mounting base. The mounting base is located on the upper side of the outer arc surface of the mounting tube. The upper side of the inside of the mounting base is provided with fixing rods. An adjusting plate is slidably connected to the rear side of the top wall of the mounting base. Push plates are provided on the left and right sides of the front end of the adjusting plate. The front ends of the two push plates contact the outer arc surfaces of the longitudinally adjacent fixing rods. The measuring end can be quickly positioned and installed by clamping and fixing, without the need for complicated bolt tightening and flange alignment operations, which greatly shortens the installation time. When replacement or maintenance is required in the future, it can be easily removed by simply loosening the clamping plate without disassembling the flange and piping system, further reducing the downtime of the high-temperature heater and ensuring the production efficiency of cigarettes.

[0006] Furthermore, the fixing mechanism also includes a vertical plate and a clamping plate. The vertical plate is slidably connected to the guide grooves opened on the left and right sides of the lower end of the mounting base. The upper end of the vertical plate is provided with a fixing rod, and the lower side of the end of the vertical plate near the center of the inside of the mounting tube is provided with a clamping plate, which can limit and fix the mounting tube.

[0007] Furthermore, the fixing mechanism also includes crossbars and springs. The crossbars are respectively disposed on the left and right sides inside the mounting base. The crossbars are slidably connected to the sliding holes disposed on the upper side of the left end of the horizontally adjacent vertical plate. A spring is disposed between the end of the vertical plate away from the center of the mounting tube and the inner wall of the mounting base. The springs are movably sleeved with the corresponding horizontal crossbars. The thrust generated by the extension of the springs can drive the clamping plate to move and reset through the vertical plate.

[0008] Furthermore, a screw is rotatably connected to the rear side inside the mounting base, and the adjusting plate is threaded to the rear side of the outer arc surface of the screw through a threaded hole provided in the middle of its front end. An adjusting wheel is provided at the rear end of the screw, which can adjust the position of the adjusting plate.

[0009] Furthermore, a thermoelectric electrode one and a thermoelectric electrode two are respectively provided between the lower end of the reference end and the upper end of the measuring end. The lower side of the rear end of the thermoelectric electrode one contacts the lower side of the front end of the thermoelectric electrode two. An insulating sleeve is provided in the middle of the outer surface of both the thermoelectric electrode one and the thermoelectric electrode two, which can connect the reference end and the measuring end to form a closed loop.

[0010] Furthermore, a protective layer is provided on the lower side of the outer arc surface of the mounting tube to prevent the mounting tube from being corroded and damaged.

[0011] Furthermore, a rubber pad is provided at the middle of the lower end of the mounting base, and the mounting tube is located at the middle of the inner arc surface of the rubber pad. The rubber ring can improve the sealing between the mounting base and the high-temperature heater used for cigarette processing.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: The corrosion-resistant thermocouple used in this high-temperature heater has the following advantages:

[0013] The measuring end can be quickly positioned and installed by clamping, eliminating the need for complicated bolt tightening and flange alignment operations, which greatly shortens the installation time. When replacement or maintenance is required in the future, it can be easily removed by simply loosening the clamp, without disassembling the flange and piping system, further reducing the downtime of the high-temperature heater and ensuring the production efficiency of cigarettes. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of this utility model.

[0018] In the diagram: 1 Junction box, 2 Mounting tube, 3 Reference end, 4 Measuring end, 5 Thermoelectric electrode one, 6 Thermoelectric electrode two, 7 Insulating sleeve, 8 Fixing mechanism, 81 Vertical plate, 82 Clamping plate, 83 Fixing rod, 84 Adjusting plate, 85 Push plate, 86 Crossbar, 87 Spring, 88 Mounting base, 9 Screw, 10 Adjusting wheel, 11 Protective layer, 12 Rubber pad. Detailed Implementation

[0019] 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.

[0020] Please see Figure 1-4 This embodiment provides a technical solution: a corrosion-resistant thermocouple for a high-temperature heater, including a junction box 1, an installation tube 2 disposed in the middle of the lower end of the junction box 1, a measuring end 4 disposed in the middle of the lower end of the installation tube 2, and a reference end 3 disposed in the middle of the top wall of the junction box 1. The reference end 3 is made of copper, which has the advantages of good conductivity, easy processing and low cost. The measuring end 4 is made of nickel-based alloy. The measuring end 4 made of nickel-based alloy is suitable for oxidizing or neutral environments, and the maximum working temperature can reach 1200℃. It has good stability and high sensitivity. It also includes a fixing mechanism 8.

[0021] Fixing mechanism 8 includes a fixing rod 83, an adjusting plate 84, a push plate 85, and a mounting base 88. The mounting base 88 is located on the upper side of the outer arc surface of the mounting tube 2. Fixing rods 83 are respectively provided on the upper side of the interior of the mounting base 88. An adjusting plate 84 is slidably connected to the rear side of the top wall of the mounting base 88. Push plates 85 are respectively provided on the left and right sides of the front end of the adjusting plate 84. The front ends of the two push plates 85 respectively contact the outer arc surfaces of the longitudinally adjacent fixing rods 83. The fixing mechanism 8 also includes a vertical plate 81 and a clamping plate 82. The vertical plate 81 is slidably connected to the guide grooves opened on the left and right sides of the lower end of the mounting base 88. Fixing rods 83 are respectively provided on the upper end of the vertical plate 81. Clamping plates 82 are respectively provided on the lower side of the end of the vertical plate 81 closest to the center of the interior of the mounting tube 2. It also includes crossbars 86 and springs 87. Crossbars 86 are respectively set on the left and right sides inside the mounting base 88. Crossbars 86 are slidably connected to the sliding holes set on the upper side of the left end of the adjacent horizontal plate 81. Springs 87 are respectively set between the end of the vertical plate 81 away from the center of the mounting tube 2 and the inner wall of the mounting base 88. Springs 87 are movably sleeved with the corresponding horizontal crossbars 86. The measuring end 4 can be quickly positioned and installed by clamping and fixing, without complicated bolt tightening and flange alignment operations, which greatly shortens the installation time. When replacement or maintenance is required in the future, it can be easily removed by simply loosening the clamp 82 without disassembling the flange and piping system, further reducing the downtime of the high-temperature heater and ensuring the production efficiency of cigarettes.

[0022] Wherein: a screw 9 is rotatably connected to the rear side inside the mounting base 88, and an adjusting plate 84 is threadedly connected to the rear side of the outer arc surface of the screw 9 through a threaded hole set in the middle of its front end. An adjusting wheel 10 is set at the rear end of the screw 9.

[0023] The reference end 3 and the measuring end 4 are respectively equipped with a first thermoelectric electrode 5 and a second thermoelectric electrode 6 between their lower ends. The lower side of the rear end of the first thermoelectric electrode 5 contacts the lower side of the front end of the second thermoelectric electrode 6. Insulating sleeves 7 are provided in the middle of the outer surfaces of both the first thermoelectric electrode 5 and the second thermoelectric electrode 6. During cigarette production, when the high-temperature heater is used to dry or bake the tobacco, the measuring end 4 is affected by the high-temperature heater, causing its temperature to rise. Meanwhile, the reference end 3 remains at room temperature, resulting in a relatively lower temperature. The reference end 3 and the measuring end 4 form a closed loop through the first thermoelectric electrode 5 and the second thermoelectric electrode 6. Due to the temperature difference between the reference end 3 and the measuring end 4, a thermoelectric potential is generated in the loop. This electromotive force is related to the temperature difference between the reference end 3 and the measuring end 4. The temperature difference between the measuring terminals 4 is proportional. Then, the reference terminal 3 transmits this thermoelectric potential to the external measuring device through a wire. The external measuring device calculates the temperature of the measuring terminal 4 by measuring the thermoelectric potential and combining it with the calibration curve of the thermocouple (or the lookup table method). Thermoelectric electrode 1 5 is made of nickel-chromium-silicon alloy, and thermoelectric electrode 2 6 is made of nickel-silicon alloy. Nickel-chromium-silicon alloy and nickel-silicon alloy have good resistance to sulfide corrosion, and the thermoelectric potential output is relatively stable and has good oxidation resistance. The insulating sleeve 7 is made of high-purity alumina ceramic. The insulating sleeve 7 made of high-purity alumina ceramic is suitable for high-temperature environments and has good insulation and mechanical strength. The insulating sleeve 7 is required between thermoelectric electrode 1 5 and thermoelectric electrode 2 6 to prevent short circuits and signal interference.

[0024] Among them, a protective layer 11 is provided on the lower side of the outer arc surface of the mounting tube 2. The protective layer 11 is a silicon carbide coating. The silicon carbide coating has the advantages of high temperature resistance and corrosion resistance, and the hardness of the silicon carbide coating is also relatively high.

[0025] Among them: a rubber pad 12 is provided in the middle of the lower end of the mounting base 88, and the mounting tube 2 is located in the middle of the inner arc surface of the rubber pad 12. The mounting base 88 contacts the upper surface of the pipe interface through the rubber pad 12. The rubber ring 12 can improve the sealing between the mounting base 88 and the high-temperature heater used for cigarette processing.

[0026] The working principle of the corrosion-resistant thermocouple for a high-temperature heater provided by this utility model is as follows: Before use, the mounting tube 2 is inserted into the connecting pipe at the upper end of the corresponding high-temperature heater, so that the mounting base 88 contacts the upper surface of the pipe interface through the rubber pad 12. Then, the operator rotates the adjusting wheel 10. During the rotation of the adjusting wheel 10, the screw 9 will rotate. During the rotation of the screw 9, the adjusting plate 84 will move forward through the threaded connection. The adjusting plate 84 will move the push rod 85 forward. During the movement of the push rod 85, the push rod 85 will give a pushing force to the fixed rod 83, so that the push rod 85 will move the upright plate 81 through the fixed rod 83. The spring 87 will contract, and the upright plate 81 will move the clamping plate 82 forward. As the pipe moves, the distance between the clamping plate 82 and the outer arc surface of the connecting pipe gradually decreases until the clamping plate 82 contacts the outer arc surface of the connecting pipe, thus achieving the installation and fixation of the corrosion-resistant thermocouple for the high-temperature heater. Then, the reference end 3 is connected to an external measuring instrument via a wire. During cigarette production, when the high-temperature heater is used for drying, baking, or other processes on tobacco, the measuring end 4 is affected by the high-temperature heater, causing its temperature to rise. Meanwhile, the reference end 3 remains at room temperature, with a relatively lower temperature. The reference end 3 and the measuring end 4 form a closed loop through electrode 5 and thermoelectrode 6. Due to the temperature difference between the reference end 3 and the measuring end 4, a temperature difference will occur in the loop. A thermoelectric potential is generated between the reference terminal 3 and the measuring terminal 4. This potential is proportional to the temperature difference between the reference terminal 3 and the measuring terminal 4. The reference terminal 3 transmits this potential to an external measuring device via a wire. The external measuring device measures the thermoelectric potential and, in conjunction with the thermocouple calibration curve (or a lookup table), calculates the temperature of the measuring terminal 4. The thermocouple's operating principle requires two thermoelectrodes, one (5) and the other (6), made of different materials, to form a stable contact point at the measuring terminal 4. A thermoelectric potential can only be generated under the influence of the temperature difference when thermoelectrodes one (5) and two (6) are in direct contact. An insulating sleeve (7) is required between thermoelectrodes one (5) and two (6) to prevent short circuits and signal interference. The reference terminal 3 is made of copper, which has good electrical conductivity and is easy to process. With the advantages of low cost, the measuring end 4 is made of nickel-based alloy. The measuring end 4 made of nickel-based alloy is suitable for oxidizing or neutral environments, and the maximum working temperature can reach 1200℃. It has good stability and high sensitivity. The thermoelectric electrode 1 5 is made of nickel-chromium-silicon alloy, and the thermoelectric electrode 2 6 is made of nickel-silicon alloy. Nickel-chromium-silicon alloy and nickel-silicon alloy have good resistance to sulfide corrosion, and the thermoelectric potential output is relatively stable and has good oxidation resistance. The insulating sleeve 7 is made of high-purity alumina ceramic. The insulating sleeve 7 made of high-purity alumina ceramic is suitable for high-temperature environments and has good insulation and mechanical strength. The protective layer 11 is a silicon carbide coating. The silicon carbide coating has the advantages of high temperature resistance and corrosion resistance, and the hardness of the silicon carbide coating is also relatively high.

[0027] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A corrosion-resistant thermocouple for a high-temperature heater, comprising a junction box (1), an installation tube (2) disposed at the middle of the lower end of the junction box (1), a measuring end (4) disposed at the middle of the lower end of the installation tube (2), and a reference end (3) disposed at the middle of the top wall of the junction box (1), characterized in that: It also includes fixed mechanisms (8); Fixing mechanism (8): It includes a fixing rod (83), an adjusting plate (84), a push plate (85) and a mounting base (88). The mounting base (88) is located on the upper side of the outer arc surface of the mounting tube (2). The upper side inside the mounting base (88) is provided with a fixing rod (83). The rear side of the top wall of the mounting base (88) is slidably connected to the adjusting plate (84). The left and right sides of the front end of the adjusting plate (84) are respectively provided with push plates (85). The front ends of the two push plates (85) are respectively in contact with the outer arc surface of the longitudinally adjacent fixing rod (83).

2. The corrosion-resistant thermocouple for a high-temperature heater according to claim 1, characterized in that: The fixing mechanism (8) also includes a vertical plate (81) and a clamping plate (82). The vertical plate (81) is slidably connected to the guide grooves opened on the left and right sides of the lower end of the mounting base (88). The upper end of the vertical plate (81) is provided with a fixing rod (83), and the lower side of the end of the vertical plate (81) near the center of the inside of the mounting tube (2) is provided with a clamping plate (82).

3. The corrosion-resistant thermocouple for a high-temperature heater according to claim 1, characterized in that: The fixing mechanism (8) also includes a crossbar (86) and a spring (87). The crossbar (86) is respectively set on the left and right sides inside the mounting base (88). The crossbar (86) is slidably connected to the sliding hole set on the upper side of the left end of the horizontally adjacent vertical plate (81). A spring (87) is respectively set between the end of the vertical plate (81) away from the center of the mounting tube (2) and the inner wall of the mounting base (88). The spring (87) is movably sleeved with the horizontally corresponding crossbar (86).

4. The corrosion-resistant thermocouple for a high-temperature heater according to claim 1, characterized in that: The mounting base (88) has a screw (9) rotatably connected to its rear side. The adjusting plate (84) is threaded to the rear side of the outer arc surface of the screw (9) through a threaded hole in the middle of its front end. An adjusting wheel (10) is provided at the rear end of the screw (9).

5. The corrosion-resistant thermocouple for a high-temperature heater according to claim 1, characterized in that: Thermoelectric electrode one (5) and thermoelectric electrode two (6) are respectively provided between the lower end of the reference end (3) and the upper end of the measuring end (4). The lower side of the rear end of thermoelectric electrode one (5) is in contact with the lower side of the front end of thermoelectric electrode two (6). An insulating sleeve (7) is provided in the middle of the outer surface of thermoelectric electrode one (5) and thermoelectric electrode two (6).

6. The corrosion-resistant thermocouple for a high-temperature heater according to claim 1, characterized in that: A protective layer (11) is provided on the lower side of the outer arc surface of the mounting tube (2).

7. The corrosion-resistant thermocouple for a high-temperature heater according to claim 1, characterized in that: A rubber pad (12) is provided at the middle of the lower end of the mounting base (88), and the mounting tube (2) is located at the middle of the inner arc surface of the rubber pad (12).

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