Mounting structure of bed temperature wear-resistant thermocouple
By using protective sleeves and metal sleeve structures to protect the thermocouple armored wires in the circulating fluidized bed boiler, the problem of easy wear of the bed thermocouple is solved, extending the service life and ensuring the long-term and stable operation of the boiler.
Patent Information
- Application Number
- CN202420414743.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-05
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-03-05
AI Technical Summary
The bed thermocouples in circulating fluidized bed boilers are susceptible to high temperatures and fine particles, resulting in a shortened service life and affecting the long-term and stable operation of the boiler.
A bed temperature wear-resistant thermocouple installation structure is designed. By protecting the protective sleeve and metal sleeve, the thermocouple armored wire can be avoided from directly contacting the high-temperature flue gas and fine particle bed material, and the protective sleeve and metal sleeve are used. The tube structure, combined with the design of inner and outer sleeves and metal columns, fixes the thermocouple to reduce wear.
It extends the service life of the thermocouple, ensures long-term and effective monitoring of the bed material temperature in the central area of the furnace, and ensures the long-term and stable operation of the boiler.
Smart Images
Figure CN222188562U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of boiler instruments, in particular to an installation structure of a bed temperature wear-resistant thermocouple. Background Art
[0002] A certain number of bed temperature thermocouples are required for circulating fluidized bed boilers. Compared with the installation inserted from the side wall, the measurement method of the thermocouple entering the bottom of the furnace through the air chamber can more effectively measure the bed material temperature in the center of the furnace. At the same time, the high temperature generated by fuel combustion and the continuous wear of fine particles of bed material will greatly reduce the service life of the bed temperature thermocouple. Therefore, the wear resistance of the bed temperature thermocouple is related to the long-term stable operation of the boiler. Summary of the invention
[0003] In order to solve the problem that the existing thermocouples are easily subject to continuous wear and tear, which shortens their service life and affects the stable operation of the boiler, the utility model provides an installation structure for a bed temperature wear-resistant thermocouple, which can reduce wear and tear, extend the service life, and enable the boiler to operate stably for a long time.
[0004] The technical solution is as follows: a bed temperature wear-resistant thermocouple installation structure, which includes a furnace casting layer, and a wind chamber is arranged outside the furnace casting layer. It is characterized in that a protective sleeve passes through the entire wind chamber from the outside of the wind chamber and extends into the furnace casting layer, and a thermocouple armor wire is arranged in the protective sleeve. A metal sleeve is arranged on the outside of one end of the thermocouple armor wire extending into the furnace, and the other end of the thermocouple armor wire is located outside the wind chamber and connected to a thermocouple junction box.
[0005] It is further characterized in that the protective sleeve comprises an outer sleeve and an inner sleeve, a cover plate is welded to one end of the outer sleeve and the inner sleeve close to the thermocouple, the other end of the outer sleeve is welded to the metal sleeve, a hole is opened on the outer side of the cover plate and an internal threaded pipe is installed, and the thermocouple is fixed on the internal threaded pipe;
[0006] The metal sleeve is a metal cylinder with a blind hole inside and one end of the hole opening as a concave cone. The inner sleeve extends into the metal cylinder and rests against the top of the cone. The outer diameter of the metal sleeve is consistent with the outer diameter of the outer sleeve.
[0007] After adopting the utility model, the thermocouple armor wire is protected by the protective sleeve and the metal sleeve to avoid direct contact with high-temperature flue gas and fine-grained bed materials. The thermocouple armor wire will not be worn, which increases the service life. The bed material temperature in the center area of the furnace can be effectively monitored for a long time, so that the boiler can operate stably for a long time. BRIEF DESCRIPTION OF THE DRAWINGS
[0008] Figure 1 It is a schematic diagram of the structure of the utility model. DETAILED DESCRIPTION
[0009] See Figure 1 As shown, a bed temperature wear-resistant thermocouple installation structure includes a furnace casting layer 1, a wind chamber 2 is arranged outside the furnace casting layer 1, a protective sleeve penetrates the entire wind chamber 2 from the outside of the wind chamber 2 and extends into the furnace casting layer 1, a thermocouple armor wire 3 is arranged in the protective sleeve, a metal sleeve 6 is arranged outside the end of the thermocouple armor wire 3 extending into the furnace, the other end of the thermocouple armor wire 3 is located outside the wind chamber 2 and connected to a thermocouple junction box 7, the protective sleeve includes an outer sleeve 4 and an inner sleeve 5, a cover plate 8 is welded at one end of the outer sleeve 4 and the inner sleeve 5 close to the thermocouple junction box 7, and the other end of the outer sleeve 4 is welded to the metal sleeve 6 to ensure that the entire sleeve is fixed in the wind chamber without displacement or vibration, the outer side of the cover plate 8 is opened and an internal threaded pipe 9 is installed, and the thermocouple junction box 7 is fixed on the internal threaded pipe 9.
[0010] The metal sleeve 6 is a metal cylinder, a blind hole is opened inside the metal cylinder and one end of the hole is an inwardly concave cone, the inner sleeve is inserted into the metal cylinder and abuts against the top of the cone, and no welding is required. The outer diameter of the metal sleeve 6 is consistent with the outer diameter of the outer sleeve 4. The metal sleeve 6 is generally made of high temperature resistant and wear-resistant material, the diameter can be selected according to the wear strength of the bed material, and the height can be adjusted according to different positions of the bed temperature measurement.
[0011] During installation, the thermocouple armor wire 3 can be of φ6 specification, guided and fixed through the inner sleeve 5, and inserted from the lower part of the inner sleeve 5, and goes up to the inside of the φ9 opening of the metal sleeve 6. It should be noted that the thermocouple armor wire 3 needs to be inserted to a sufficient depth, and the end needs to ensure close contact with the top of the opening of the metal sleeve 6. The thermocouple uses a movable external thread form, which is connected to the reserved internal thread pipe, and the insertion depth can be adjusted according to needs.
Claims
1. A bed temperature wear-resistant thermocouple installation structure, comprising a furnace casting layer, wherein a wind chamber is arranged outside the furnace casting layer, characterized in that: A protective sleeve runs through the entire wind chamber from the outside of the wind chamber and extends into the furnace casting layer. A thermocouple armor wire is arranged in the protective sleeve. A metal sleeve is arranged on the outside of one end of the thermocouple armor wire extending into the furnace. The other end of the thermocouple armor wire is located outside the wind chamber and connected to a thermocouple junction box.
2. The installation structure of a bed temperature wear-resistant thermocouple according to claim 1, characterized in that: The protective sleeve includes an outer sleeve and an inner sleeve, a cover plate is welded to one end of the outer sleeve and the inner sleeve close to the thermocouple, the other end of the outer sleeve is welded to the metal sleeve, a hole is opened on the outer side of the cover plate and an internal threaded pipe is installed, and the thermocouple is fixed on the internal threaded pipe.
3. The installation structure of a bed temperature wear-resistant thermocouple according to claim 2, characterized in that: The metal sleeve is a metal cylinder with a blind hole inside and one end of the hole opening as a concave cone. The inner sleeve extends into the metal cylinder and rests against the top of the cone. The outer diameter of the metal sleeve is consistent with the outer diameter of the outer sleeve.