Modular sealed thermocouple

Abstract

The utility model relates to vacuum furnace temperature measurement technical field discloses a modularization sealed thermocouple, including upper sealing box, lower sealing box and sealed protection subassembly, lower sealing box is fixed in upper sealing box, sealed protection subassembly includes protection pipe, at least two first sealing rings, outer thread block, tight block and clamping pipe, and protection pipe is inserted and is matched in lower sealing box, at least two first sealing rings set up in the inside of lower sealing box, and the inner wall of first sealing ring is pasted in the outer wall of protection pipe, outer thread block is connected in lower sealing box with thread, tight block is set up in the outer wall of protection pipe, and its both ends are respectively abutted in outer thread block and first sealing ring, clamping pipe is set up in the outer wall of protection pipe, and is welded fixed with tight block, the utility model discloses the cooperation of outer thread block and tight block makes sealing ring even deformation, and sealing is reliable and convenient to dismount, and protection pipe can be replaced alone, and clamping pipe supports protection protection pipe from outside, effectively buffers external force impact, prolongs the service life of protection pipe.

Description

Technical Field

[0001] This utility model relates to the field of vacuum furnace temperature measurement technology, and more specifically, to a modular sealed thermocouple. Background Technology

[0002] Thermocouples are indispensable temperature measuring elements in high-temperature heat treatment equipment such as vacuum furnaces and atmosphere furnaces. Based on the Seebeck effect, they convert temperature signals into thermoelectric potential signals, enabling precise monitoring and control of the temperature inside the furnace. In a vacuum environment, the through-wall sealing performance of thermocouples directly affects the stability of the vacuum system, as well as the accuracy of temperature measurement and the operational safety of the equipment.

[0003] In the use of existing thermocouples for vacuum furnaces, the protective tube is easily damaged by long-term high temperature corrosion, mechanical vibration or accidental collision. After damage, the entire tube can only be replaced, resulting in high maintenance costs and long downtime. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0005] Therefore: The first aspect of this utility model proposes a modular sealed thermocouple, including an upper sealing box, a lower sealing box, and a sealing and protection component.

[0006] The lower sealing box is fixed to the upper sealing box; the sealing and protection assembly includes a protective tube, at least two first sealing rings, an external threaded block, a tightening block, and a clamping tube. The protective tube is inserted into the lower sealing box; at least two first sealing rings are disposed inside the lower sealing box, and the inner wall of the first sealing rings is in contact with the outer wall of the protective tube; the external threaded block is threadedly connected to the lower sealing box; the tightening block is sleeved on the outer wall of the protective tube, and its two ends abut against the external threaded block and the first sealing ring respectively; the clamping tube is sleeved on the outer wall of the protective tube and welded to the tightening block for fixation.

[0007] This utility model proposes a modular sealing thermocouple. When the external threaded block is tightened, the external threaded block applies axial pressure to the first sealing ring through the tightening block, causing the first sealing ring to undergo radial elastic deformation, thereby clamping the outer wall of the protective tube and achieving a reliable clamping seal between the protective tube and the lower sealing box. When the protective tube needs to be replaced, simply loosen the external threaded block to release the clamping effect of the first sealing ring on the protective tube, and the protective tube can be pulled out of the lower sealing box for replacement. The clamping tube is sleeved on the outer wall of the protective tube and welded and fixed to the tightening block. The clamping tube provides external support and protection for the protective tube, extending the service life of the protective tube.

[0008] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0009] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of one embodiment of the present utility model; Figure 2 This is a cross-sectional structural diagram of one embodiment of the present invention; Figure 3 This is a partial structural diagram of one embodiment of the present invention; Figure 4 This is a schematic diagram of the calibration component structure in one embodiment of the present invention.

[0010] in, Figures 1 to 4 The correspondence between the reference numerals and component names in the attached drawings is as follows: 100 Upper sealing box, 200 Lower sealing box, 500 Wiring panel, 600 Connecting plug; 300 Sealing and Protection Component, 310 Protective Tube, 320 First Sealing Ring, 330 External Threaded Block, 340 Tightening Block, 350 Sealing Pressure Ring, 360 Clamping Tube; 400 calibration assembly, 410 flange, 420 sealing column, 430 calibration hole, 440 second sealing ring, 450 plug. Detailed Implementation

[0011] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0012] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0013] Please see Figures 1 to 4A modular sealed thermocouple is provided, comprising an upper sealing box 100, a lower sealing box 200, and a sealing protection assembly 300. The lower sealing box 200 is fixed to the upper sealing box 100. The sealing protection assembly 300 includes a protective tube 310, at least two first sealing rings 320, an external threaded block 330, a clamping block 340, and a clamping tube 360. The protective tube 310 is inserted into the lower sealing box 200. At least two first sealing rings 320 are disposed inside the lower sealing box 200, and the inner wall of the first sealing rings 320 is in contact with the outer wall of the protective tube 310. The external threaded block 330 is threadedly connected to the lower sealing box 200. The clamping block 340 is sleeved on the outer wall of the protective tube 310, and its two ends abut against the external threaded block 330 and the first sealing rings 320, respectively. The clamping tube 360 ​​is sleeved on the outer wall of the protective tube 310 and welded to the clamping block 340.

[0014] In this embodiment: The lower sealing box 200 is fixed to the upper sealing box 100; the upper sealing box 100 and the lower sealing box 200 together constitute the main body housing of the thermocouple, providing installation space and external protection for the internal wiring structure and sealing structure.

[0015] The sealing and protective assembly 300 includes a protective tube 310, at least two first sealing rings 320, an external threaded block 330, a clamping block 340, and a clamping tube 360. The protective tube 310 is inserted into the lower sealing box 200. At least two first sealing rings 320 are disposed inside the lower sealing box 200, and the inner walls of the first sealing rings 320 are in contact with the outer wall of the protective tube 310. The external threaded block 330 is threadedly connected to the lower sealing box 200. The clamping block 340 is sleeved on the outer wall of the protective tube 310, and its two ends abut against the external threaded block 330 and the first sealing rings 320, respectively. 0; The clamping tube 360 ​​is sleeved on the outer wall of the protective tube 310 and welded and fixed to the tightening block 340; The first sealing ring 320 is made of high temperature resistant, aging resistant and elastic fluororubber or perfluoroether rubber material. The tightening block 340, as an intermediate force transmission component, evenly transmits the axial pressure of the external threaded block 330 to the first sealing ring 320, so that it is uniformly stressed and deformed. The clamping tube 360 ​​forms a ring-shaped support and protection for the protective tube 310 from the outside, effectively buffering the radial impact force and vibration load during installation and use, and extending the service life of the protective tube.

[0016] Please see Figure 3 In some embodiments of this utility model, the sealing and protection assembly 300 further includes at least one sealing ring 350, which is sleeved on the outer wall of the protective tube 310 and located between two adjacent first sealing rings 320. The sealing ring 350 slides in cooperation with the inner wall of the lower sealing box 200.

[0017] In this embodiment: At least one sealing ring 350 is sleeved on the outer wall of the protective tube 310, and the sealing ring 350 is located between two adjacent first sealing rings 320. The sealing ring 350 slides in fit with the inner wall of the lower sealing box 200. The sealing ring 350 is located between two adjacent first sealing rings 320 to evenly distribute the axial pressing force transmitted by the top block 340 to the upper and lower first sealing rings 320, so as to avoid uneven force when multiple first sealing rings 320 are stacked, thereby improving the overall sealing effect and sealing reliability.

[0018] Please see Figure 4 In some embodiments of this utility model, a calibration assembly 400 is provided between the upper sealing box 100 and the lower sealing box 200. The calibration assembly 400 includes a flange 410 and a sealing column 420. The flange 410 is disposed between the upper sealing box 100 and the lower sealing box 200. The sealing column 420 is fixed to the flange 410, and one end of the sealing column 420 away from the flange 410 extends to the outside of the upper sealing box 100. The sealing column 420 has a calibration hole 430, which penetrates the sealing column 420 along its axial direction.

[0019] In this embodiment: Flange 410 is positioned between the upper sealing box 100 and the lower sealing box 200.

[0020] The sealing column 420 is fixed to the flange 410, and the end of the sealing column 420 away from the flange 410 extends to the outside of the upper sealing box 100; the sealing column 420 provides an external operating interface for calibration operations, so that calibration work can be carried out without opening the sealing shell or removing the thermocouple from the equipment, reducing the downtime required for calibration.

[0021] The sealing column 420 has a calibration hole 430, which extends through the sealing column 420 along its axial direction. The calibration hole 430 is the insertion channel for a standard thermocouple. During calibration, the standard thermocouple is inserted through the calibration hole 430 to achieve online comparison and calibration. After calibration, the standard thermocouple can be removed to restore normal use. The operation is simple and efficient.

[0022] Please see Figure 4 In some embodiments of this utility model, the calibration component 400 further includes a second sealing ring 440 and a plug 450. The second sealing ring 440 is disposed between the flange 410 and the lower sealing box 200. The plug 450 is detachably installed at one end of the sealing post 420 extending to the outside of the upper sealing box 100.

[0023] In this embodiment: The second sealing ring 440 is disposed between the flange 410 and the lower sealing box 200; the second sealing ring 440 is used to achieve end face sealing between the flange 410 and the lower sealing box 200 to prevent gas from leaking from the mating surface of the flange 410 and the lower sealing box 200.

[0024] The plug 450 is detachably installed at one end of the sealing post 420 extending to the outside of the upper sealing box 100; when calibration is required, simply unscrew or pull out the plug 450 to insert a standard thermocouple for calibration, which is convenient and quick to use.

[0025] Please see Figure 4 In some embodiments of this utility model, the protective tube 310 is detachably provided with an insulating tube and a coupling wire inside.

[0026] In this embodiment: The protective tube 310 has an internally detachable insulating tube and a thermocouple wire. The thermocouple wire is the core temperature sensing element. The insulating tube is sleeved on the outside of the thermocouple wire for electrical insulation between the thermocouple wires and between the thermocouple wire and the protective tube, ensuring the accuracy of the temperature measurement signal. The detachable design facilitates the individual replacement and verification of the thermocouple wire, further reducing maintenance costs.

[0027] Please see Figure 1 In some embodiments of this utility model, the modular sealed thermocouple further includes: a wiring panel 500 and a connecting plug 600. The wiring panel 500 is fixed inside the lower sealing box 200 and electrically connected to the thermocouple wire; the connecting plug 600 is fixed to the upper sealing box 100, and the wiring terminal is located inside the upper sealing box 100 and electrically connected to the wiring panel 500.

[0028] In this embodiment: The wiring panel 500 is fixed inside the lower sealing box 200 and electrically connected to the thermocouple wire. The wiring panel 500 leads out the thermoelectric potential signal generated by the thermocouple wire and provides standardized wiring terminals to facilitate the connection, maintenance and debugging of internal circuits.

[0029] The connector 600 is fixed to the upper sealing box 100, and the wiring terminal is located inside the upper sealing box 100 and electrically connected to the wiring panel 500.

[0030] In the claims, description, and accompanying drawings of this utility model, the term "plural" refers to two or more objects. Unless otherwise explicitly defined, the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description process, and are not intended to indicate or imply that the device or element referred to must have the described specific orientation, or be constructed and operated in a specific orientation. Therefore, these descriptions should not be construed as limitations on this utility model. The terms "connect," "install," "fix," etc., should be interpreted broadly. For example, "connect" can be a fixed connection between multiple objects, a detachable connection between multiple objects, or an integral connection; it can be a direct connection between multiple objects or an indirect connection between multiple objects through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood based on the specific circumstances described above.

[0031] In the claims, description, and drawings of this utility model, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In the claims, description, and drawings of this utility model, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0032] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A modular sealed thermocouple, characterized in that, include: Upper sealed box (100); The lower sealing box (200) is fixed to the upper sealing box (100). A sealing and protective assembly (300) includes a protective tube (310), at least two first sealing rings (320), an external threaded block (330), a clamping block (340), and a clamping tube (360). The protective tube (310) is inserted into the lower sealing box (200). At least two first sealing rings (320) are disposed inside the lower sealing box (200), and the inner wall of the first sealing ring (320) is attached to the outer wall of the protective tube (310); The external threaded block (330) is threadedly connected to the lower sealing box (200); The clamping block (340) is sleeved on the outer wall of the protective tube (310), and its two ends abut against the external threaded block (330) and the first sealing ring (320) respectively. The clamping tube (360) is sleeved on the outer wall of the protective tube (310) and welded to the top block (340); The external threaded block (330) squeezes the first sealing ring (320) through the tightening block (340), causing the first sealing ring (320) to undergo elastic deformation and hug the outer wall of the protective tube (310).

2. The modular sealed thermocouple according to claim 1, characterized in that, The sealing and protective assembly (300) also includes: At least one sealing ring (350) is fitted on the outer wall of the protective tube (310), and the sealing ring (350) is located between two adjacent first sealing rings (320), and the sealing ring (350) slides in cooperation with the inner wall of the lower sealing box (200).

3. The modular sealed thermocouple according to claim 1, characterized in that, A calibration assembly (400) is provided between the upper sealing box (100) and the lower sealing box (200). The calibration assembly (400) includes a flange (410) and a sealing column (420). The flange (410) is located between the upper sealing box (100) and the lower sealing box (200). The sealing column (420) is fixed to the flange (410), and one end of the sealing column (420) away from the flange (410) extends to the outside of the upper sealing box (100). The sealing column (420) has a calibration hole (430) that penetrates the sealing column (420) along its axial direction.

4. The modular sealed thermocouple according to claim 3, characterized in that, The calibration component (400) also includes: The second sealing ring (440) is disposed between the flange (410) and the lower sealing box (200); A plug (450) is detachably mounted on one end of the sealing post (420) extending to the outside of the upper sealing box (100).

5. The modular sealed thermocouple according to claim 1, characterized in that, The protective tube (310) is detachably equipped with an insulating tube and a coupling wire inside.

6. The modular sealed thermocouple according to claim 5, characterized in that, The modular sealed thermocouple also includes: A wiring panel (500) is fixed inside the lower sealing box (200) and electrically connected to the coupling wire; A connector (600) is fixed to the upper sealing box (100), and the wiring terminal is located inside the upper sealing box (100) and electrically connected to the wiring panel (500).

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