Protective sleeve and armored thermocouple using same
By installing a multi-layered protective sleeve that is resistant to high temperatures and wear around the probe of the temperature detection instrument, the problem of easy damage to the probe in high-temperature and dusty environments is solved, thereby improving accuracy and lifespan.
Patent Information
- Application Number
- CN202422309834.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-09-20
AI Technical Summary
Temperature detection probes are prone to wear in high-temperature, dusty, and chemically corrosive environments, affecting detection accuracy and service life.
The detection probe is wrapped with a high-temperature resistant first sleeve and a wear-resistant and chemically corrosion-resistant second sleeve, combined with a high-temperature adhesive and a metal heat transfer layer to form a multi-layer protective structure.
It improves the wear resistance and chemical corrosion resistance of the detection probe, ensures the accuracy of temperature detection and extends its service life, and reduces the impact of shaking on the probe.
Smart Images
Figure CN223512817U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to temperature detector protection technical field, especially a kind of protective sleeve and armored thermocouple applying it. BACKGROUND
[0002] Temperature detection instrument is commonly used for detecting temperature equipment, simple structure, convenient operation, cost-effective, widely used in metallurgy, electric power, plastics, food, packaging machinery and other industries, also applicable to the system needing to carry out multi-segment curve program temperature control, for example, dry quenching process, coke is cooled in inert gas, the heat generated is used to generate steam, and then power generation or heating, boiler inlet temperature is an important parameter reflecting cooling efficiency and energy recovery condition, its accurate measurement is crucial for system optimization, so temperature interface needs to be set at the place to connect temperature detection instrument to measure boiler inlet temperature.
[0003] Whether in dry quenching process or other high-temperature flue dust conveying process, the detection probe of temperature detection instrument will be in high-temperature, dusty environment when used, which will cause wear to the detection probe, and the detection probe will also be subjected to high-temperature sulfur corrosion and other chemical effects in dry quenching process, which seriously affects its detection accuracy and service life.
[0004] Therefore, people urgently need a protective sleeve with good protection effect, which can ensure the detection accuracy of temperature detection instrument and improve the service life of temperature detection instrument. SUMMARY
[0005] The utility model discloses a kind of protective sleeve and armored thermocouple applying it, to solve the problems existing in the prior art described above, utilize the wrapping protective effect of first sleeve and second sleeve, provide good protection effect for the detection probe in the interior, to ensure the detection accuracy of temperature detection instrument and improve its service life.
[0006] To achieve the above object, the utility model provides the following scheme: the utility model provides a kind of protective sleeve, including high-temperature-resistant first sleeve and high-temperature-resistant, wear-resistant, chemical-erosion-resistant second sleeve, the first sleeve is sleeved on the outer periphery of the detection probe, the second sleeve is sleeved on the outer periphery of the first sleeve, the end of the first sleeve and the second sleeve close to the free end of the detection probe is closed.
[0007] Preferably, the first sleeve is austenitic stainless steel sleeve.
[0008] Preferably, the second sleeve is ceramic sleeve.
[0009] Preferably, the top of the second sleeve is not less than the top of the part of the detection probe extending into the detected area.
[0010] Preferably, a high-temperature adhesive layer is arranged between the first sleeve and the second sleeve.
[0011] Preferably, the inner diameter of the first sleeve is greater than the outer diameter of the detection probe.
[0012] Preferably, a metal heat transfer layer for heat transfer is arranged between the first sleeve and the detection probe.
[0013] Preferably, the first sleeve and the second sleeve are cylindrical sleeves, and the bottom of each of the first sleeve and the second sleeve is rounded.
[0014] Preferably, a third sleeve is coaxially arranged at the end of the free end of the first sleeve away from the detection probe, one end of the third sleeve away from the first sleeve is provided with a connecting flange for connecting with a temperature interface, the outer diameter of the third sleeve matches the inner diameter of the temperature interface, the connecting flange is connected with the temperature detection instrument, the inner cavity of the third sleeve is in communication with the inner cavity of the first sleeve, the third sleeve is sleeved on the outer periphery of the detection probe, and the detection probe penetrates into the first sleeve through the connecting flange and the third sleeve in sequence.
[0015] The utility model also provides a kind of armored thermocouple of application above-mentioned protective sleeve, including protective sleeve and thermocouple body, the straight type connector of the thermocouple body is threadedly connected on the connecting flange, and the detection probe of the thermocouple body is located in the first sleeve and the third sleeve.
[0016] Compared with the prior art, the utility model mainly achieves the following technical effects:
[0017] The first sleeve resistant to high temperature and the second sleeve resistant to high temperature, wear and chemical corrosion are sleeved on the outer periphery of the detection probe in sequence, so as to protect the detection probe, improve the wear resistance and chemical corrosion resistance of the detection probe, and further ensure the detection accuracy of the temperature detection instrument and improve its service life.
[0018] Compared with the prior art, the other schemes of the utility model achieve the following technical effects:
[0019] The installation stability of the protective sleeve can be realized by the connection of the third sleeve and the connecting flange, which is conducive to stably protecting the internal detection probe, reducing the generation of shaking and reducing the influence of shaking on the detection probe. BRIEF DESCRIPTION OF DRAWINGS
[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained based on these drawings without creative labor.
[0021] Figure 1 Structure diagram of the armored thermocouple provided with the protective sleeve shown in the embodiment;
[0022] Figure 2 For Figure 1 Structure enlarged view at A in the middle;
[0023] 1, thermocouple body; 2, first sleeve; 3, second sleeve; 4, third sleeve; 5, high-temperature adhesive layer; 6, metal heat transfer layer; 7, connecting flange; 8, straight connector; 9, detection probe. DETAILED DESCRIPTION
[0024] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.
[0025] The purpose of the present application is to provide a protective sleeve and an armored thermocouple using the same, so as to solve the problems in the prior art. The protective sleeve provides good protection for the internal detection probe by the wrapping and protection of the first sleeve and the second sleeve, thereby ensuring the detection accuracy of the temperature detection instrument and improving its service life.
[0026] In order to make the above-mentioned purposes, features and advantages of the present application more apparent, understandable and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.
[0027] Please refer to the drawings as Figure 1 , Figure 2As shown, a protective sleeve is provided, including a high-temperature resistant first sleeve 2 and a high-temperature resistant, wear-resistant, and chemically resistant second sleeve 3. The first sleeve 2 is sleeved around the outer periphery of the detection probe 9 and is fixedly connected to the temperature detection instrument. The connection method can be welding or adhesive bonding. The second sleeve 3 is sleeved around the outer periphery of the first sleeve 2. The second sleeve 3 can be adhesively bonded to the first sleeve 2 or extend axially and adhesively bonded to the temperature detection instrument to complete the sleeve around the outer periphery of the first sleeve 2. The ends of the first sleeve 2 and the second sleeve 3 near the free end of the detection probe 9 are both sealed. By using the high-temperature resistant first sleeve 2 and the high-temperature resistant, wear-resistant, and chemically resistant second sleeve 3 sequentially sleeved around the outer periphery of the detection probe 9, the detection probe 9 is protected, the wear resistance and chemical corrosion resistance of the detection probe 9 are improved, thereby ensuring the detection accuracy of the temperature detection instrument and extending its service life.
[0028] In this embodiment, the first sleeve 2 is an austenitic stainless steel sleeve, specifically SUS310S, also known as UNSS31008, which can withstand temperatures up to 1000℃. In other embodiments, the material of the first sleeve 2 can also be other metal materials that can be used in an environment of 1000℃ and have good thermal conductivity, such as tungsten, molybdenum, etc.
[0029] In this embodiment, the second sleeve 3 is a ceramic sleeve. The ceramic can withstand temperatures up to 1400℃ and resist particle abrasion and chemical corrosion. In other embodiments, the material of the second sleeve 3 can also be an alloy material, such as high-temperature alloy steel (e.g., Hastelloy), nickel-based alloys, and chromium-molybdenum alloys. When an alloy that can be welded to the first sleeve 2 is used, the second sleeve 3 can be welded to the first sleeve 2.
[0030] In this embodiment, the top of the second sleeve 3 is not less than the top of the portion of the detection probe 9 that extends into the area to be detected, that is, the second sleeve 3 covers the portion of the detection probe 9 that extends into the area to be detected, thereby improving the protection effect on the detection probe 9.
[0031] Since the second sleeve 3 in this embodiment is made of ceramic, which is brittle and more prone to damage the longer it is, the overall length of the second sleeve 3 can be reduced by shortening the distance between the top of the second sleeve 3 and the top of the portion of the detection probe 9 that extends into the area to be detected. Taking the dry quenching process as an example, the length of the detection probe 9 extending into the inner cavity of the sleeve is 350mm, which means that the distance between the detection probe 9 and the flue gas is 350mm. The remaining portion of the detection probe 9 is located in the furnace wall and temperature interface. The temperature in the furnace wall and temperature interface is low and it is not a dusty environment, so the protection of the second sleeve 3 is not required. Therefore, the second sleeve 3 can be set to 450mm, with the top of the second sleeve 3 slightly higher than the top of the portion of the detection probe 9 that extends into the area to be detected.
[0032] In this embodiment, the second sleeve 3 is installed as follows: a high-temperature adhesive layer 5 is provided between the first sleeve 2 and the second sleeve 3. The connection between the first sleeve 2 and the second sleeve 3 is completed by using the high-temperature adhesive. The high-temperature adhesive is resistant to high temperatures up to 1800℃ and has the characteristic that the higher the temperature, the tighter the adhesion in a dry and high-temperature environment, which can ensure that the second sleeve 3 will not fall off during use.
[0033] In this embodiment, the inner diameter of the first sleeve 2 is larger than the outer diameter of the detection probe 9. This can effectively improve the ease with which the detection probe 9 can be inserted into the first sleeve 2, and prevent the detection probe 9 from being too long and causing difficulty in insertion or even getting stuck.
[0034] Since a gap is provided between the first sleeve 2 and the detection probe 9 to improve the ease of insertion of the detection probe 9, a metal heat transfer layer 6 for heat transfer is provided between the first sleeve 2 and the detection probe 9 to avoid the gap affecting the heat transfer efficiency. The metal heat transfer layer 6 can be composed of metal powder, which is filled into the gap after the detection probe 9 is inserted. The metal powder can be copper, aluminum, etc.
[0035] To avoid significant impact on the fluid, the first sleeve 2 and the second sleeve 3 are cylindrical sleeves, and the bottom of both the first sleeve 2 and the second sleeve 3 are rounded.
[0036] In this embodiment, a third sleeve 4 is coaxially arranged at the free end of the first sleeve 2 away from the detection probe 9. A connecting flange 7 for connecting to a temperature interface is provided at the end of the third sleeve 4 away from the first sleeve 2. The two are welded together. The outer diameter of the third sleeve 4 matches the inner diameter of the temperature interface. The connecting flange 7 is connected to the temperature detection instrument. The connection method can be selected according to the type of temperature detection instrument, such as welding, bolting, or adhesive bonding. The inner cavity of the third sleeve 4 is connected to the inner cavity of the first sleeve 2. Specifically, the bottom of the third sleeve 4 is closed, and a through hole for the detection probe 9 to pass through is opened at the closed position. This through hole connects the first sleeve 2 and the third sleeve 4. The third sleeve 4 is sleeved on the outer periphery of the detection probe 9. The detection probe 9 passes through the connecting flange 7 and the third sleeve 4 in sequence and extends into the first sleeve 2. The arrangement of the third sleeve 4, together with the connection of the connecting flange 7, can realize the installation stability of the protective sleeve, which is conducive to the stable protection of the internal detection probe 9, reducing the generation of shaking, and reducing the impact of shaking on the detection probe 9. In this embodiment, the third sleeve 4 and the first sleeve 2 are made of the same material, and the two can be welded or integrally set. This utility model also provides an armored thermocouple using the above-mentioned protective sleeve, including a protective sleeve and a thermocouple body 1. A threaded hole is provided on the connecting flange 7 corresponding to the position of the straight connector 8 on the thermocouple body 1. The straight connector 8 with threads at the bottom of the thermocouple body 1 is threaded onto the connecting flange 7, realizing the connection between the thermocouple body 1 and the protective sleeve. The detection probe 9 of the thermocouple body 1 is located inside the first sleeve 2 and the third sleeve 4.
[0037] In actual dry quenching processes, after connecting the thermocouple body 1 to the protective sleeve, the connecting flange 7 of the protective sleeve can be directly connected to the temperature interface.
[0038] Any adaptive changes made according to actual needs are within the protection scope of this utility model.
[0039] It should be noted that, for those skilled in the art, it is obvious that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0040] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.
Claims
1. A protective sleeve for protecting the detection probe of a temperature measuring instrument, characterized in that, It includes a high-temperature resistant first sleeve and a high-temperature resistant, wear-resistant, and chemically resistant second sleeve. The first sleeve is sleeved around the outer periphery of the detection probe, and the second sleeve is sleeved around the outer periphery of the first sleeve. The ends of the first sleeve and the second sleeve near the free end of the detection probe are both closed. The first sleeve is an austenitic stainless steel sleeve, or the material of the first sleeve is tungsten or molybdenum; The second sleeve is a ceramic sleeve, or the material of the second sleeve is high-temperature alloy steel, nickel-based alloy, or chromium-molybdenum alloy; A high-temperature adhesive layer is provided between the first sleeve and the second sleeve; The inner diameter of the first sleeve is larger than the outer diameter of the detection probe, and a metal heat transfer layer for heat transfer is provided between the first sleeve and the detection probe.
2. The protective sleeve according to claim 1, characterized in that, The top of the second sleeve is not less than the top of the portion of the detection probe that extends into the area to be detected.
3. The protective sleeve according to claim 1, characterized in that, The first sleeve and the second sleeve are cylindrical sleeves, and the bottom of both the first sleeve and the second sleeve are rounded.
4. The protective sleeve according to claim 1, characterized in that, A third sleeve is coaxially disposed at the free end of the first sleeve away from the detection probe. A connecting flange for connecting to a temperature interface is disposed at the end of the third sleeve away from the first sleeve. The outer diameter of the third sleeve matches the inner diameter of the temperature interface. The connecting flange is connected to the temperature detection instrument. The inner cavity of the third sleeve is connected to the inner cavity of the first sleeve. The third sleeve is sleeved on the outer periphery of the detection probe. The detection probe passes through the connecting flange and the third sleeve in sequence and extends into the first sleeve.
5. A sheathed thermocouple, characterized in that, Includes the protective sleeve as described in claim 4 and the thermocouple body, wherein the straight connector of the thermocouple body is threaded onto the connecting flange, and the detection probe of the thermocouple body is located inside the first sleeve and the third sleeve.