Thermocouple protection mechanism

Abstract

The utility model provides a kind of thermocouple protection mechanism, it is related to thermocouple protection device field, including thermocouple assembly, including the terminal box for wiring, the resistance wire for measurement, the insulating sleeve for the insulation protection of the resistance wire, tube cover and ceramic tube, and for the tube seat and the first outer thread for fixing the tube cover, protection component, including the flange for providing installation support, for protecting the protection sleeve of the thermocouple assembly, for fixing the connecting pipe of the thermocouple assembly;The utility model is cooperated by shell, inner shell, interlayer and phase change material, and phase change material uses ionic liquid, when thermocouple assembly operating environment temperature changes, the phase change characteristics of ionic liquid can absorb or release a large amount of heat, effectively buffer temperature fluctuation, provide stable working environment for thermocouple assembly, prolong its service life, reduce the damage caused by temperature abrupt change, improve the accuracy and stability of measurement.

Description

Technical Field

[0001] This utility model belongs to the field of thermocouple protection devices, specifically a thermocouple protection mechanism. Background Technology

[0002] A thermocouple is a temperature sensor that converts temperature changes into electrical potential changes. It consists of two metal conductors of different materials and works based on the Seebeck effect. Its structure includes thermocouples, insulating sleeves, protective tubes, and junction boxes. It is widely used in industry and daily life. When installing a thermocouple, protective devices are required to provide support and protection to ensure its stability and safety.

[0003] According to Chinese Patent Application No. 202420131069.7, a thermocouple safety protection and fixing device for thermoelectric equipment is disclosed, including a thermocouple body, a junction box at the top of the thermocouple body, a protective sleeve below the junction box, the protective sleeve being fixed to the outside of the thermocouple body, and a connecting mechanism at the bottom of the protective sleeve. By setting the protective sleeve, the exposed part of the thermocouple body can be protected. By setting the connecting mechanism, the position of the mounting plate can be limited by placing the positioning pin inside the positioning groove. Furthermore, by setting the connecting block, the connection area between the mounting plate and the fixing sleeve is increased, thereby enhancing the connection effect between the mounting plate and the fixing sleeve.

[0004] Existing technology effectively solves the problem that when thermocouples fail during long-term use and need to be replaced or repaired, the disassembly and installation process is time-consuming and not easy to quickly disassemble and install, thus reducing the effectiveness of the device. It has the advantage of being able to easily disassemble and install thermocouples. However, the protective mechanism of this type of thermocouple is not effective in resisting the attack of high temperature, causing the resistance value of the resistance wire to drift, which in turn affects the accuracy of temperature measurement. At the same time, high temperature will also accelerate the aging and damage of materials, shortening the service life of the thermocouple.

[0005] In summary, this utility model provides a thermocouple protection mechanism to solve the above problems. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] A thermocouple protection mechanism includes a thermocouple assembly comprising a junction box for wiring, a resistance wire for measurement, an insulating sleeve for insulating and protecting the resistance wire, a tube sleeve, and a ceramic tube, as well as a tube seat and a first external thread for fixing the tube sleeve. The protection assembly includes a flange for providing mounting support, a protective sleeve for protecting the thermocouple assembly, a connecting tube for fixing the thermocouple assembly, a connecting nut, and a second external thread. The protective sleeve includes an outer shell, an inner shell, a sandwich layer, and a phase change material. The inner shell is fixed to the inner cavity of the outer shell, the sandwich layer is located between the outer shell and the inner shell, the phase change material fills the inner cavity of the sandwich layer, and one end of the ceramic tube penetrates the inner cavity of the protective sleeve. The phase change material is an ionic liquid.

[0008] Furthermore, in this invention, the thermocouple assembly also includes a retaining ring for preventing the connecting nut from falling off. The retaining ring is fixed to the lower end of the tube surface, and the connecting nut is sleeved on the surface of the tube.

[0009] Furthermore, in this utility model, the connecting pipe is fixed to the top of the flange, the second external thread is formed at the upper end of the surface of the connecting pipe, and the end of the connecting pipe away from the flange extends to the inner cavity of the connecting nut, and is threadedly connected to the inner cavity of the connecting nut through the second external thread.

[0010] Furthermore, in this utility model, one end of the sleeve is fixedly connected to a ceramic tube, one end of the resistance wire extends through the inner cavity of the junction box, and the insulating sleeve is fixed to the surface of the resistance wire.

[0011] Furthermore, in this utility model, the ceramic tube is sleeved on the surface of the insulating sleeve, the first external thread is formed at the upper end of the tube sleeve surface, and the tube seat is fixed to the bottom of the junction box.

[0012] Furthermore, in this utility model, the end of the sleeve away from the retaining ring extends into the inner cavity of the tube seat and is threadedly connected to the inner wall of the tube seat through a first external thread, and the inner cavity of the tube seat is provided with an internal thread.

[0013] Beneficial effects: This utility model has the following beneficial effects:

[0014] This invention utilizes the combination of an outer shell, an inner shell, a sandwich layer, and a phase change material, with the phase change material being an ionic liquid. When the operating environment temperature of the thermocouple assembly changes, the phase change characteristics of the ionic liquid can absorb or release a large amount of heat, effectively buffering temperature fluctuations, providing a stable working environment for the thermocouple assembly, extending its service life, reducing damage caused by sudden temperature changes, and improving the accuracy and stability of measurements. Through the cooperation of the connecting pipe, connecting nut, and second external thread, as well as the threaded connection of the sleeve, pipe seat, and first external thread, the thermocouple assembly and protective assembly can be firmly fixed, preventing loosening or falling off during use and ensuring the overall stability of the mechanism. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the thermocouple assembly and the protective assembly in their separated state according to this utility model.

[0017] Figure 3 This is a schematic diagram of the main structure of the thermocouple assembly of this utility model;

[0018] Figure 4 This is a front view cross-sectional structural diagram of the protective sleeve of this utility model.

[0019] In the picture:

[0020] 100. Thermocouple assembly; 110. Junction box; 120. Resistance wire; 130. Insulating sleeve; 140. Tube sleeve; 150. Ceramic tube; 160. Tube seat; 170. First external thread; 180. Retaining ring; 200. Protective assembly; 210. Flange; 220. Protective sleeve; 221. Outer shell; 222. Inner shell; 223. Interlayer; 224. Phase change material; 230. Connecting pipe; 240. Connecting nut; 250. Second external thread. Detailed Implementation

[0021] To better understand the technical content of this utility model, specific embodiments are described below in conjunction with the accompanying drawings. Various aspects of this utility model are described in this disclosure with reference to the accompanying drawings, which illustrate numerous illustrative embodiments. The embodiments of this disclosure are not necessarily defined to include all aspects of this utility model. It should be understood that the various concepts and embodiments described above, as well as those described in more detail below, can be implemented in any of many ways, because the concepts and embodiments disclosed in this utility model are not limited to any particular implementation. Furthermore, some aspects of this utility model can be used alone or in any suitable combination with other aspects disclosed in this utility model.

[0022] Example 1

[0023] like Figure 1-4The image shows the first embodiment of this utility model, which provides a thermocouple protection mechanism, including a thermocouple assembly 100, comprising a junction box 110 for wiring, a resistance wire 120 for measurement, an insulating sleeve 130 for insulating and protecting the resistance wire 120, a tube sleeve 140, and a ceramic tube 150, as well as a tube seat 160 and a first external thread 170 for fixing the tube sleeve 140, and a protection assembly 200, including a flange 210 for providing mounting support and a protective element for protecting the thermocouple assembly 100. The protective sleeve 220 includes a connecting tube 230 for fixing the thermocouple assembly 100, a connecting nut 240, and a second external thread 250. The protective sleeve 220 includes an outer shell 221, an inner shell 222, a sandwich 223, and a phase change material 224. The inner shell 222 is fixed to the inner cavity of the outer shell 221. The sandwich 223 is located between the outer shell 221 and the inner shell 222. The phase change material 224 fills the inner cavity of the sandwich 223. One end of the ceramic tube 150 penetrates the inner cavity of the protective sleeve 220. The phase change material 224 is an ionic liquid.

[0024] like Figure 1-4 As shown, the protective sleeve 220 consists of an outer shell 221, an inner shell 222, a sandwich 223, and a phase change material 224. The outer shell 221 and the inner shell 222 provide a physical protective barrier, preventing damage to the thermocouple assembly 100 caused by external impacts or scratches. The phase change material 224 filled in the sandwich 223 is an ionic liquid. Ionic liquids have good thermal and chemical stability, and can resist harsh environments such as high temperature and chemical corrosion to a certain extent, further protecting the resistance wire 120 inside the thermocouple assembly 100 and extending its service life. The sleeve 140 is connected to the inner wall thread of the tube seat 160 through the first external thread 170, and the connecting tube 230 is connected through the second external thread 170. The external thread 250 is connected to the internal thread of the connecting nut 240. The threaded connection method is simple and reliable. During installation, operators can easily and quickly assemble the various components together. When maintenance or replacement of the thermocouple assembly 100 is required, it can also be easily disassembled, improving work efficiency. The insulating sleeve 130 in the thermocouple assembly 100 is fixed to the surface of the resistance wire 120, and the ceramic tube 150 is sleeved on the surface of the insulating sleeve 130. Both the insulating sleeve 130 and the ceramic tube 150 have good insulation performance, which can effectively prevent the resistance wire 120 from leaking current, ensure that the resistance wire 120 can work normally and accurately measure temperature, and also improve the safety during use.

[0025] Example 2

[0026] Reference Figure 1-4 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0027] In this embodiment, the thermocouple assembly 100 also includes a retaining ring 180 for preventing the connecting nut 240 from falling off. The retaining ring 180 is fixed to the lower end of the surface of the sleeve 140, and the connecting nut 240 is sleeved on the surface of the sleeve 140.

[0028] The connecting pipe 230 is fixed to the top of the flange 210. The second external thread 250 is formed at the upper end of the surface of the connecting pipe 230. The end of the connecting pipe 230 away from the flange 210 extends into the inner cavity of the connecting nut 240 and is threadedly connected to the inner cavity of the connecting nut 240 through the second external thread 250.

[0029] One end of the sleeve 140 is fixedly connected to the ceramic tube 150, and one end of the resistance wire 120 passes through the inner cavity of the junction box 110. The insulating sleeve 130 is fixed to the surface of the resistance wire 120.

[0030] A ceramic tube 150 is fitted onto the surface of an insulating sleeve 130, a first external thread 170 is formed at the upper end of the surface of the sleeve 140, and a tube seat 160 is fixed to the bottom of a junction box 110.

[0031] The end of the sleeve 140 away from the retaining ring 180 extends into the inner cavity of the tube seat 160 and is threaded to the inner wall of the tube seat 160 through the first external thread 170. The inner cavity of the tube seat 160 is provided with an internal thread.

[0032] like Figure 1-4As shown, the sleeve 140 of the thermocouple assembly 100 is threaded to the inner wall of the tube seat 160 via a first external thread 170, and the connecting tube 230 is threaded to the inner cavity of the connecting nut 240 via a second external thread 250. This threaded connection allows for easy disassembly and installation when the thermocouple needs replacement or maintenance; simply rotating the corresponding components facilitates the process. Compared to some complex connection methods, this effectively shortens operation time and improves the device's performance. The thermocouple assembly 100 also includes a retaining ring 180 to prevent the connecting nut 240 from falling off, ensuring that the connecting nut 240 will not accidentally fall off during normal use. Furthermore, there is no need to worry about losing the nut during disassembly and installation, further enhancing the convenience of assembly and disassembly. (Protective component 200...) The protective sleeve 220 includes an outer shell 221, an inner shell 222, a sandwich 223, and a phase change material 224. The phase change material 224 is filled in the sandwich 223 between the outer shell 221 and the inner shell 222. The phase change material 224 has the characteristic of undergoing a phase change at a specific temperature and absorbing or releasing a large amount of heat. When the ambient temperature around the thermocouple rises, the phase change material 224 absorbs heat and undergoes a phase change, thereby effectively reducing the heat transferred to the inside of the thermocouple assembly 100, reducing the impact of high temperature on the resistance wire 120, avoiding the resistance value of the resistance wire 120 from drifting, and ensuring the accuracy of temperature measurement. Through the barrier and buffering of high temperature by the protective sleeve 220, the direct effect of high temperature on the internal materials of the thermocouple is reduced, thereby reducing the speed of material aging and damage.

[0033] In use, the protective assembly 200 is fixed at the measuring position via flange 210, and then the thermocouple assembly 100 is connected to the protective assembly 200 via connecting nut 240 and connecting tube 230. One end of ceramic tube 150 passes through the inner cavity of protective sleeve 220, allowing resistance wire 120 to contact the measured temperature environment. When resistance wire 120 measures the temperature change and generates thermoelectric potential, the signal is transmitted to the external measuring instrument through junction box 110. In this process, the protective assembly 200 provides mechanical protection and temperature buffer for thermocouple assembly 100, ensuring that thermocouple assembly 100 can work stably and accurately. Phase change material 224 can undergo phase change when the temperature changes, absorbing or releasing a large amount of heat, effectively buffering and regulating the temperature, and protecting thermocouple assembly 100 from the effects of high temperature or rapid temperature changes.

[0034] All standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The control method is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art and is common knowledge in the field. Since this application is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail in this application.

[0035] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Those skilled in the art to which this invention pertains can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of this invention shall be determined by the claims.

Claims

1. A thermocouple protection mechanism, characterized in that: include, Thermocouple assembly (100) includes a junction box (110) for wiring, a resistance wire (120) for measurement, an insulating sleeve (130) for insulating and protecting the resistance wire (120), a tube sleeve (140) and a ceramic tube (150), and a tube seat (160) and a first external thread (170) for fixing the tube sleeve (140); The protective assembly (200) includes a flange (210) for providing mounting support, a protective sleeve (220) for protecting the thermocouple assembly (100), a connecting tube (230) for securing the thermocouple assembly (100), a connecting nut (240), and a second external thread (250); The protective sleeve (220) includes an outer shell (221), an inner shell (222), a sandwich layer (223), and a phase change material (224). The inner shell (222) is fixed to the inner cavity of the outer shell (221). The sandwich layer (223) is located between the outer shell (221) and the inner shell (222). The phase change material (224) fills the inner cavity of the sandwich layer (223). One end of the ceramic tube (150) penetrates the inner cavity of the protective sleeve (220). The phase change material (224) is an ionic liquid.

2. The thermocouple protection mechanism as described in claim 1, characterized in that: The thermocouple assembly (100) also includes a retaining ring (180) for preventing the connecting nut (240) from falling off. The retaining ring (180) is fixed to the lower end of the surface of the sleeve (140), and the connecting nut (240) is sleeved on the surface of the sleeve (140).

3. The thermocouple protection mechanism as described in claim 1, characterized in that: The connecting pipe (230) is fixed to the top of the flange (210), and the second external thread (250) is formed at the upper end of the surface of the connecting pipe (230). The end of the connecting pipe (230) away from the flange (210) extends to the inner cavity of the connecting nut (240) and is threadedly connected to the inner cavity of the connecting nut (240) through the second external thread (250).

4. The thermocouple protection mechanism as described in claim 1, characterized in that: One end of the sleeve (140) is fixedly connected to a ceramic tube (150), one end of the resistance wire (120) passes through the inner cavity of the junction box (110), and the insulating sleeve (130) is fixed to the surface of the resistance wire (120).

5. The thermocouple protection mechanism as described in claim 1, characterized in that: The ceramic tube (150) is sleeved on the surface of the insulating sleeve (130), the first external thread (170) is opened at the upper end of the surface of the tube sleeve (140), and the tube seat (160) is fixed to the bottom of the junction box (110).

6. The thermocouple protection mechanism as described in claim 1, characterized in that: The end of the sleeve (140) away from the retaining ring (180) extends into the inner cavity of the tube seat (160) and is threaded to the inner wall of the tube seat (160) through the first external thread (170). The inner cavity of the tube seat (160) is provided with an internal thread.

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