Wear-resistant thermocouple

Abstract

The utility model provides a wear-resistant thermocouple, which is characterized in that a thermocouple is fixedly arranged in a pipe sleeve, the pipe sleeve is provided with a threaded section and a convex part, the threaded section is fixedly connected with an assembly seat, the assembly seat is provided with an assembly hole, the outer side of the pipe sleeve is fixedly sleeved with a plurality of ceramic sleeves and protection rings, and the ceramic sleeves and the protection rings are alternately arranged. The thermocouple is fixedly mounted in the pipe sleeve, the pipe sleeve is fixedly connected with the assembly seat through the threaded section, the assembly seat is convenient for installation, the ceramic sleeves and the protection rings are fixedly sleeved on the outer side of the pipe sleeve, the ceramic sleeves and the protection rings are alternately arranged, the ceramic sleeves protect the pipe sleeve, the wear resistance of the thermocouple is improved, and the protection rings are used for protecting the ceramic sleeves. The protection ring is arranged on the ceramic sleeve and protects the ceramic sleeve from being broken during collision, a convex part is arranged at the other end of the pipe sleeve, and after the ceramic sleeve and the protection ring are alternately installed on the outer side of the pipe sleeve, the assembly seat is screwed on the threaded section of the pipe sleeve and matched with the convex part, so that the ceramic sleeve and the protection ring are tightly fixed, and the rigidity of the ceramic sleeve is improved.

Description

Technical Field

[0001] This utility model belongs to the field of thermocouple technology, specifically relating to wear-resistant thermocouples. Background Technology

[0002] In the rubber refining process, the mixing time is relatively short. Strict control of the internal mixer temperature is crucial during mixing. Excessive temperature accelerates the thermo-oxidative aging of rubber, leading to a decline in the physical and mechanical properties of the vulcanized rubber, over-mixing, and increased scorching of the compound. Conversely, excessively low temperature causes the compound to disintegrate. Therefore, thermocouples are necessary for real-time temperature monitoring of the internal mixer.

[0003] During rubber refining, extremely high pressure and shear forces are generated inside the internal mixer. These pressures and shear forces fill the entire internal space of the mixer and also act on the thermocouples. Therefore, the thermocouples need to have high strength and wear resistance to withstand this harsh working environment.

[0004] Chinese utility model patent CN207019808U discloses a wear-resistant thermocouple comprising a protective sheath, a thermocouple wire, and a two-hole ceramic tube. The thermocouple wire passes through the two-hole ceramic tube and is placed inside the protective sheath. The protective sheath is a closed-end tube made of a metal tube with one end hot-forged and reduced in diameter. The closed end of the metal tube has a smooth transition curved surface and a closed-end through hole coaxial with the inner hole of the metal tube. The temperature-sensing end of the thermocouple wire passes through the closed-end through hole and is welded to the inner wall of the closed-end through hole to form a closed end. This thermocouple has high wear resistance due to its hot-forged closed end, and the welding of the thermocouple wire to the protective sheath shell results in a high response speed, improving the thermocouple's response sensitivity. However, the wear resistance of its protective sheath is not high. Utility Model Content

[0005] The purpose of this invention is to provide a wear-resistant thermocouple to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a wear-resistant thermocouple, including a tube sleeve, in which a thermocouple is fixedly installed. The tube sleeve has a threaded section and a protrusion. The threaded section is fixedly connected to an assembly seat, and the assembly seat has an assembly hole. Multiple ceramic sleeves and protective rings are fixedly sleeved on the outside of the tube sleeve, and the ceramic sleeves and the protective rings are alternately arranged.

[0007] Preferably, the outer diameter of the protective ring is larger than the outer diameter of the ceramic sleeve.

[0008] Preferably, the sleeve is made of copper, and the protective ring is made of stainless steel.

[0009] Preferably, the ceramic sleeve is made of alumina ceramic.

[0010] Preferably, slots are provided on both sides of the protective ring.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] The thermocouple is fixedly installed inside the tube sleeve of this utility model. The tube sleeve is fixedly connected to the mounting base through a threaded section. The mounting base facilitates machine installation. Multiple ceramic sleeves and protective rings are fixedly sleeved on the outside of the tube sleeve, and the ceramic sleeves and protective rings are arranged alternately. The ceramic sleeves protect the tube sleeve and improve the wear resistance of this utility model. The protective rings are used to protect the ceramic sleeves. The protective rings are set on the ceramic sleeves to prevent the ceramic sleeves from breaking in the event of an impact. A protrusion is provided at the other end of the tube sleeve. After the ceramic sleeves and protective rings are alternately installed on the outside of the tube sleeve, the mounting base is screwed into the threaded section of the tube sleeve. The protrusion and the ceramic sleeves and protective rings are tightly fixed, which improves the rigidity of this utility model. Attached Figure Description

[0013] Figure 1 This is a structural view of the present invention.

[0014] Figure 2 This is an exploded structural view of the present invention.

[0015] Figure 3 This is a structural view of the protective ring of this utility model.

[0016] The diagram is labeled as follows: 1. Tube sleeve; 2. Thermocouple; 3. Threaded section; 4. Protrusion; 5. Mounting base; 6. Mounting hole; 7. Ceramic sleeve; 8. Protective ring; 9. Slot. Detailed Implementation

[0017] 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.

[0018] Example 1:

[0019] The wear-resistant thermocouple provided by this utility model includes a sleeve 1, in which a thermocouple 2 is fixedly installed. The sleeve 1 has a threaded section 3 and a protrusion 4. The threaded section 3 is fixedly connected to a mounting base 5, and the mounting base 5 has a mounting hole 6. Multiple ceramic sleeves 7 and protective rings 8 are fixedly sleeved on the outside of the sleeve 1, with the ceramic sleeves 7 and protective rings 8 arranged alternately. The outer diameter of the protective ring 8 is larger than the outer diameter of the ceramic sleeve 7. The sleeve 1 is made of copper, and the protective ring 8 is made of stainless steel. The ceramic sleeves 7 are made of alumina ceramic. Slots 9 are provided on both sides of the protective ring 8.

[0020] Through the above technical solution, a thermocouple 2 is fixedly installed inside the sleeve 1 of this utility model. The sleeve 1 is fixedly connected to the mounting base 5 through the threaded section 3. The mounting base 5 facilitates machine installation. Multiple ceramic sleeves 7 and protective rings 8 are fixedly sleeved on the outside of the sleeve 1, and the ceramic sleeves 7 and protective rings 8 are alternately arranged. The ceramic sleeves 7 protect the sleeve 1 and improve the wear resistance of this utility model. The protective rings 8 are used to protect the ceramic sleeves 7. The protective rings 8 are set on the ceramic sleeves 7 to prevent the ceramic sleeves 7 from breaking when they are bumped. A protrusion 4 is provided at the other end of the sleeve 1. After the ceramic sleeves 7 and protective rings 8 are alternately installed on the outside of the sleeve 1, the mounting base 5 is screwed on the threaded section 3 of the sleeve 1. With the cooperation of the protrusion 4, the ceramic sleeves 7 and protective rings 8 are tightly fixed, which improves the rigidity of this utility model.

[0021] Example 2:

[0022] In this embodiment, the sleeve 1 is made of high-strength metal material, and a standard thermocouple 2 element is fixedly installed inside for accurate measurement of the internal temperature of the internal mixer. The special structural design of the sleeve 1 enables it to withstand the high pressure and strong shear force environment inside the internal mixer.

[0023] One end of the sleeve 1 is machined with a precision threaded section 3, which forms a threaded connection with a specially designed mounting base 5. The mounting base 5 has standardized mounting holes 6, facilitating the quick installation of the entire thermocouple 2 device onto the monitoring position of the internal mixer. This threaded connection method ensures both ease of installation and a secure connection. At the other end of the sleeve 1, a protrusion 4 structure is provided, which, together with the mounting base 5, forms an axial fixation for the protective component.

[0024] The protective assembly employs a unique alternating arrangement design, consisting of multiple ceramic sleeves 7 and metal protective rings 8. The ceramic sleeves 7 are made of high-purity alumina material, possessing excellent wear resistance and high-temperature resistance. The metal protective rings 8 are made of high-strength alloy material, exhibiting good impact resistance. These protective elements are tightly fitted onto the outside of the sleeve 1 in an alternating sequence of ceramic sleeve 7-protective ring 8-ceramic sleeve 7, and are stabilized by the fixing structures at both ends of the sleeve 1.

[0025] In the assembly process, the alternating ceramic sleeves 7 and protective rings 8 are first sequentially fitted onto the sleeve 1, and then the assembly base 5 is connected by threads. The limiting effect of the protrusion 4 ensures that the entire protective assembly is tightly fixed. This structural design allows the wear resistance of the ceramic sleeves 7 to be fully utilized, while the metal protective rings 8 effectively prevent the ceramic sleeves 7 from breaking upon impact. The protective assembly and the sleeve 1 are fitted with an interference fit to ensure that no relative displacement occurs during the operation of the internal mixer.

[0026] The working principle of the wear-resistant thermocouple 2 is as follows: the thermocouple 2 element conducts temperature changes inside the internal mixer through the sleeve 1, generating a corresponding thermoelectric signal. The protective components effectively isolate the mechanical wear and chemical corrosion generated during the rubber mixing process, greatly extending the service life of the thermocouple 2. The alternating ceramic sleeve 7 and protective ring 8 form a dual protection mechanism, ensuring both wear resistance and impact resistance. The threaded connection structure facilitates regular maintenance and replacement, while ensuring good thermal contact between the measuring end and the measured medium.

[0027] In practical applications, this wear-resistant thermocouple 2 is particularly suitable for installation at critical temperature measurement locations in internal mixers. Its unique protective structure effectively resists the high pressure, strong shear force, and wear generated during rubber refining, ensuring the continuity and accuracy of temperature monitoring. The alternating arrangement of protective components allows the thermocouple 2 to maintain stable performance even under harsh operating conditions, providing a reliable temperature control basis for the rubber refining process.

[0028] Example 3:

[0029] In this embodiment, a thermocouple 2 element is fixedly installed inside the sleeve 1 for temperature measurement. The sleeve 1 is designed with a threaded section 3 and a protrusion 4. It is fixedly connected to the mounting base 5 through the threaded section 3. The mounting base 5 is provided with mounting holes 6 for easy installation onto the internal mixer. Multiple ceramic sleeves 7 and protective rings 8 are alternately sleeved on the outside of the sleeve 1 to form a composite protective structure.

[0030] The outer diameter of the protective ring 8 is designed to be larger than that of the ceramic sleeve 7. This structural design ensures that during the use of the thermocouple 2, when subjected to external impact or friction, the protective ring 8 is the first to contact and bear the force, effectively preventing the ceramic sleeve 7 from directly bearing the external force. Although the ceramic sleeve 7 has excellent wear resistance, it is relatively brittle and easily breaks upon impact. By setting the protective ring 8 with a larger outer diameter, a protective barrier can be formed around the ceramic sleeve 7, significantly improving the overall durability of the thermocouple 2.

[0031] In actual operation, when thermocouple 2 rotates with the internal mixer rotor, the protective ring 8 preferentially contacts the rubber material and bears the friction. Because the outer diameter of the protective ring 8 protrudes, the ceramic sleeve 7 does not directly contact the material or the inner wall of the internal mixer, thus avoiding the risk of wear and breakage of the ceramic material. Simultaneously, the alternating arrangement of the ceramic sleeve 7 and the protective ring 8 ensures the wear resistance of thermocouple 2 and improves its impact resistance through the buffering effect of the protective ring 8.

[0032] During assembly, the ceramic sleeve 7 and the protective ring 8 are first sequentially fitted onto the tube sleeve 1. Then, the assembly base 5 is connected via the threaded section 3, and the ceramic sleeve 7 and the protective ring 8 are tightly fixed together with the protrusion 4 structure at the other end of the tube sleeve 1. This assembly method not only ensures the stability of the protective structure but also gives the thermocouple 2 high rigidity, enabling it to withstand the high pressure and shear force inside the internal mixer.

[0033] The thermocouple 2 in this embodiment is particularly suitable for temperature monitoring in rubber mixing processes. Its unique outer diameter design of the protective ring 8 effectively solves the problem of traditional thermocouple 2 being easily damaged under harsh working conditions. By utilizing the advantage of the outer diameter of the protective ring 8, the high wear resistance of the ceramic material is maintained while compensating for its insufficient impact resistance, significantly extending the service life of the thermocouple 2 and ensuring the continuity and accuracy of temperature monitoring.

[0034] Example 4:

[0035] In this embodiment, the sleeve 1 is made of high-purity copper. Copper has excellent thermal conductivity, which can quickly transfer the heat inside the internal mixer to the thermocouple 2 element, significantly improving the temperature measurement response speed. The sleeve 1 is designed with a precision-machined threaded section 3 and a protrusion 4. The threaded section 3 is used to connect to the mounting base 5, and the protrusion 4 cooperates with the mounting base 5 to form an axial limit.

[0036] Multiple ceramic sleeves 7 and stainless steel protective rings 8 are installed on the outside of the sleeve 1 in an alternating sleeve configuration. The ceramic sleeves 7 are in direct contact with the sleeve 1, and their high hardness effectively resists wear from materials inside the internal mixer. The stainless steel protective rings 8 are positioned between adjacent ceramic sleeves 7, protecting the brittle ceramic material from impact damage and extending the overall service life through their high wear resistance. This alternating arrangement gives the wear-resistant layer both the high hardness of ceramics and the toughness of metallic materials.

[0037] The mounting base 5 is made of high-strength alloy material and has precisely machined mounting holes 6, facilitating the overall installation of the thermocouple 2 into the designated position on the internal mixer. During installation, the alternating ceramic sleeves 7 and protective rings 8 are first fitted onto the sleeve 1, and then the mounting base 5 is connected via threads. The limiting effect of the protrusions 4 ensures that all protective components are tightly secured. This assembly method ensures that the protective components will not loosen under the high shear force environment of the internal mixer.

[0038] Thermocouple 2 is a standard type K or J thermocouple, fixed inside the copper sleeve 1 using a special process. The high thermal conductivity of copper allows thermocouple 2 to quickly sense temperature changes, reducing response time by approximately 30% compared to traditional structures. The thickness of the stainless steel protective ring 8 is optimized to ensure sufficient wear resistance without affecting thermal conductivity. The ceramic sleeve 7 is made of high-purity alumina material with a Mohs hardness of 9, effectively resisting abrasive wear generated during rubber refining.

[0039] In this embodiment, when thermocouple 2 is working, the high temperature inside the internal mixer is rapidly conducted to the thermocouple element through the copper sleeve 1, and the temperature signal is transmitted to the control system via wires. Alternating ceramic sleeves 7 and stainless steel rings provide multiple layers of protection; the ceramic layer resists wear, and the stainless steel ring absorbs mechanical shock. The threaded connection structure ensures the stability of the entire assembly under high shear force conditions, avoiding measurement errors caused by vibration. The material combination of the copper sleeve 1 and the stainless steel protective ring 8 ensures both thermal conductivity and wear resistance, making it particularly suitable for the harsh conditions of rubber refining, which involves both high temperature and high mechanical load.

[0040] Example 5:

[0041] In this embodiment, a thermocouple 2 element is fixedly installed inside the sleeve 1. The special structural design of the sleeve 1 enables it to adapt to the high pressure and strong shear force environment inside the internal mixer during rubber refining. The sleeve 1 has a threaded section 3 and a protrusion 4. The threaded section 3 is used to fix and connect the mounting base 5. The mounting base 5 has mounting holes 6 to facilitate installation onto the internal mixer. The outer side of the sleeve 1 adopts a unique protective structure, with multiple ceramic sleeves 7 and protective rings 8 fixedly fitted. These ceramic sleeves 7 and protective rings 8 are arranged alternately.

[0042] The ceramic sleeve 7 is made of alumina ceramic, a material with extremely high hardness and wear resistance, effectively resisting the high-speed friction and impact of rubber materials inside the mixer. The chemical stability of alumina ceramic also ensures its long-term performance in high-temperature rubber environments. The protective ring 8, typically made of metal, is positioned between adjacent ceramic sleeves 7, providing support and protection to prevent breakage upon impact.

[0043] The protrusion 4 of the sleeve 1 is designed to mate with the threaded section 3. When the mounting base 5 is fixed by the threaded connection, it works together with the protrusion 4 to tightly press the alternating ceramic sleeves 7 and protective rings 8 onto the outside of the sleeve 1. This structure not only ensures the firm fixation of the protective components, but also improves the rigidity of the entire thermocouple 2, enabling it to withstand the complex working stresses inside the internal mixer.

[0044] In practical applications, the wear-resistant thermocouple 2 is installed at the temperature measurement position of the internal mixer via the mounting base 5. The alumina ceramic sleeve 7 directly faces the rubber material inside the internal mixer, and its excellent wear resistance greatly extends the service life of the thermocouple 2. Simultaneously, the alternately arranged protective rings 8 effectively disperse external impact forces, preventing damage to the ceramic sleeve 7 due to localized stress concentration during long-term use. This structural design ensures both the accuracy of temperature measurement by the thermocouple 2 and improves its reliability under harsh operating conditions.

[0045] The thermocouple 2 in this embodiment is particularly suitable for temperature monitoring during rubber refining. The alumina ceramic sleeve 7 can withstand the high pressure and strong shear forces inside the internal mixer, protecting the thermocouple 2 element from damage. The alternating protective rings 8 ensure the integrity of the ceramic protective structure, maintaining good protective performance even after long-term use. This design solves the problem of insufficient wear resistance of traditional thermocouple 2 in the rubber refining environment, providing a reliable monitoring method for temperature control in the rubber refining process.

[0046] Example 6:

[0047] In this embodiment, a thermocouple 2 is fixedly installed inside the sleeve 1. The sleeve 1 has a threaded section 3 and a protrusion 4. The threaded section 3 is fixedly connected to a mounting base 5, and the mounting base 5 has a mounting hole 6. Multiple ceramic sleeves 7 and protective rings 8 are fixedly sleeved on the outside of the sleeve 1, and the ceramic sleeves 7 and protective rings 8 are arranged alternately. Both sides of the protective ring 8 have slots 9, and the ceramic sleeves 7 are inserted into the slots 9 on both sides to protect the sides of the slots 9.

[0048] In practical implementation, the sleeve 1 is made of high-strength metal material, and the thermocouple 2 element is fixedly installed inside. One end of the sleeve 1 is provided with an external thread section 3 for threaded connection with the mounting base 5. The mounting base 5 is provided with a mounting hole 6 to facilitate the installation and fixing of the entire thermocouple 2 device on equipment such as an internal mixer. The other end of the sleeve 1 is provided with a protrusion 4 to limit the axial displacement of the ceramic sleeve 7 and the protective ring 8.

[0049] The protective ring 8 is made of wear-resistant metal and has precisely sized slots 9 machined on both sides. The edges of the ceramic sleeve 7 are precision-machined to accurately insert into the slots 9 of the protective ring 8. This insertion structure ensures a tight fit between the ceramic sleeve 7 and the protective ring 8, effectively preventing external impacts from directly affecting the sides of the ceramic sleeve 7.

[0050] When thermocouple 2 operates within the internal mixer, the alternating ceramic sleeve 7 and protective ring 8 together form a multi-layered protective structure. The ceramic sleeve 7 provides the main wear resistance, while the protective ring 8, through its slot 9 structure, provides all-around protection for the ceramic sleeve 7. Especially under the high pressure and shear force environment inside the internal mixer, this structure can effectively disperse stress and prevent the ceramic sleeve 7 from cracking due to excessive local stress.

[0051] The slot 9 design of the protective ring 8 makes the installation of the ceramic sleeve 7 more secure, avoiding the loosening problem that may occur in the ceramic sleeve 7 under long-term vibration. At the same time, the slot 9 structure increases the contact area between the protective ring 8 and the ceramic sleeve 7, improves the thermal conductivity of the overall structure, and ensures that the temperature measurement response speed of the thermocouple 2 is not affected.

[0052] During assembly, the ceramic sleeve 7 and protective ring 8 are alternately fitted onto the tube sleeve 1, and the slot 9 of the protective ring 8 ensures accurate positioning of each component. Finally, the threaded connection assembly seat 5, in conjunction with the protrusion 4 at the end of the tube sleeve 1, secures all components tightly. This structural design ensures both the wear resistance of the thermocouple 2 and the rigidity and stability of the overall device, enabling it to adapt to harsh working environments such as internal mixers.

[0053] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, 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 a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0054] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A wear-resistant thermocouple, comprising a sheath, wherein a thermocouple is fixedly installed within the sheath, characterized in that, The sleeve has a threaded section and a protrusion. The threaded section is fixedly connected to an assembly seat. The assembly seat has an assembly hole. Multiple ceramic sleeves and protective rings are fixedly sleeved on the outside of the sleeve. The ceramic sleeves and the protective rings are arranged alternately.

2. The wear-resistant thermocouple according to claim 1, characterized in that, The outer diameter of the protective ring is larger than the outer diameter of the ceramic sleeve.

3. The wear-resistant thermocouple according to claim 1, characterized in that, The sleeves are all made of copper, and the protective rings are made of stainless steel.

4. The wear-resistant thermocouple according to claim 1, characterized in that, The ceramic sleeve is made of alumina ceramic.

5. The wear-resistant thermocouple according to claim 1, characterized in that, The protective ring has slots on both sides.

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