CN213041406U

CN213041406U - Special thermocouple for boiler

Info

Publication number: CN213041406U
Application number: CN202020442312.9U
Authority: CN
Inventors: 杨建风; 徐于华; 杨康
Original assignee: Jiangsu Zhongyi Instrument Group Co ltd
Current assignee: Jiangsu Zhongyi Instrument Group Co ltd
Priority date: 2020-03-30
Filing date: 2020-03-30
Publication date: 2021-04-23
Anticipated expiration: 2030-03-30

Abstract

The utility model discloses a special thermocouple of boiler relates to thermocouple technical field, including terminal box, tube socket, cold junction, flange and measurement end, the bottom of terminal box and the top fixed connection of tube socket, the bottom of tube socket and the top fixed connection of cold junction, the bottom of cold junction and the top fixed connection of flange, the bottom of flange and the top swing joint of measurement end. This special thermocouple of boiler, can play insulating effect effectively through the heat-resisting insulating layer that sets up, can not arouse thermoelectric force's loss and interference, and the ceramic anti-adhesion coating of the outer spraying of measuring terminal, ceramic coating is heat-resisting, glossy characteristic, can prevent the outer long-pending coal ash of measuring terminal, and prevent to lead to the thermal resistance increase because of coal ash, obstruct hot conduction, the temperature conduction of the miniature temperature-sensing ware response cold junction through the installation is on the display screen, compensate the temperature that records, prevent to lead to measuring error because of the cold junction temperature variation, in order to reach the effect that measurement accuracy is high.

Description

Special thermocouple for boiler

Technical Field

The utility model relates to a thermocouple technical field specifically is a special thermocouple of boiler.

Background

In industrial processes, temperature is one of the important parameters that needs to be measured and controlled. In temperature measurement, the thermocouple is widely applied, and has the advantages of simple structure, convenient manufacture, wide measurement range, high precision, small inertia, convenient output signal remote transmission and the like. In addition, since the thermocouple is a passive sensor, no external power supply is needed during measurement, and the thermocouple is very convenient to use, the thermocouple is often used for measuring the temperature of gas or liquid in a furnace or a pipeline and the surface temperature of solid.

However, in the process of using the conventional equipment, the temperature of high-temperature high-pressure and high-speed fluid is often measured, in some coal-fired boilers, flue gas is often accompanied by corrosive gases such as sulfide, etc., which causes corrosion of a thermocouple, the service life is not long, and the boiler contains a large amount of coal ash to be accumulated, which often causes inaccurate temperature measurement of the thermocouple.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a special thermocouple of boiler possesses long service life, and the advantage that the temperature measurement precision is high has solved life weak point, the not accurate problem of temperature measurement.

The utility model discloses a solve above-mentioned technical problem, provide following technical scheme: the utility model provides a special thermocouple of boiler, includes terminal box, tube socket, cold junction, flange and measuring terminal, the bottom of terminal box and the top fixed connection of tube socket, the bottom of tube socket and the top fixed connection of cold junction, the bottom of cold junction and the top fixed connection of flange, the bottom of flange and the top swing joint of measuring terminal.

Further, the outside of cold junction includes miniature thermometer, miniature temperature-sensing ware and cold junction protection tube, the outer wall of cold junction and the inner wall fixed connection of cold junction protection tube, the outer wall that the cold junction protection tube is close to the tube socket and the outer wall fixed connection of miniature thermometer, the cold junction protection tube is close to miniature temperature-sensing ware of fixedly connected with in the miniature thermometer.

Through adopting above-mentioned technical scheme, can respond to the temperature transform of cold junction, prevent that cold junction temperature variation from causing the error.

Furthermore, the outer wall fixed mounting of terminal box has the display screen, the inside of tube socket is provided with a plurality of wires, miniature temperature-sensing ware is through the wire and the miniature thermoscope electric connection that set up, the miniature thermoscope is through the wire and the display screen electric connection that set up.

Through adopting above-mentioned technical scheme, can directly read cold junction temperature, convenient to use through the display screen.

Further, the inside of cold junction protection tube is including thermal-insulated asbestos layer and niobium tantalum alloy anticorrosive coating, the outer wall on thermal-insulated asbestos layer and the inner wall fixed connection of niobium tantalum alloy anticorrosive coating.

Through adopting above-mentioned technical scheme, prevent that the cold junction from corroding, reinforcing life.

Furthermore, the measuring end comprises a galvanic couple, a positive C \ SiC heat-resistant insulating protective layer and a ceramic anti-sticking coating inside, the outer wall of the galvanic couple is sleeved with the inner wall of the positive C \ SiC heat-resistant insulating protective layer, and the ceramic anti-sticking coating is sprayed on the outer wall of the positive C \ SiC heat-resistant insulating protective layer.

By adopting the technical scheme, the ceramic anti-sticking coating prevents dust deposition.

Furthermore, the bottom of the flange is provided with a threaded sleeve, the top of the threaded sleeve is welded with the bottom of the flange, and the inner wall of the threaded sleeve is in threaded connection with the top of the positive C \ SiC heat-resistant insulating protection layer.

Through adopting above-mentioned technical scheme, the protective sheath can be dismantled, and it is convenient to use and overhaul.

Compared with the prior art, the special thermocouple for the boiler has the following beneficial effects:

1. the utility model discloses a positive C \ SiC heat-resisting insulation protection layer that sets up can play insulating effect effectively, can not arouse the loss of thermoelectric potential and introduce the interference, and the ceramic anti-sticking coating of the outer spraying of measuring terminal, ceramic coating is heat-resisting, glossy characteristic, can prevent the exterior accumulated coal ash of measuring terminal, and prevent to lead to the thermal resistance to increase because of coal ash, hinder hot conduction, the first time, the temperature of the miniature temperature-sensing ware response cold junction through the installation is conducted on the display screen, compensate the temperature that records, prevent to lead to measuring error because of the cold junction temperature variation, in order to reach the high effect of measurement accuracy.

2. The utility model discloses a niobium-tantalum alloy anticorrosive coating that sets up, niobium-tantalum alloy very outstanding chemical property has high corrosion resistance, no matter be under cold and hot condition, does not react hydrochloric acid, concentrated nitric acid and "aqua regia", through fixing at the cold junction skin for the corrosion resistance of device strengthens greatly, and also is equipped with the protective sheath at the skin of galvanic couple, makes the device be difficult for corrosion damage, and life strengthens greatly.

Drawings

FIG. 1 is a front view of the structure of the present invention;

FIG. 2 is a half sectional view of the structure of the present invention;

fig. 3 is a sectional view of the structure part of the present invention.

In the figure: 1. a junction box; 2. a tube holder; 3. a cold end; 4. a flange; 5. a measuring end; 6. a display screen; 7. a micro thermometer; 8. a threaded sleeve; 9. a galvanic couple; 10. a positive C \ SiC heat-resistant insulating protective layer; 11. a ceramic anti-sticking coating; 12. a heat insulating asbestos layer; 13. a niobium-tantalum alloy anticorrosive layer; 14. a micro temperature sensor; 15. and (5) protecting a cold end pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be understood that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: the utility model provides a special thermocouple of boiler, including terminal box 1, tube socket 2, cold junction 3, flange 4 and measuring terminal 5, the bottom of terminal box 1 and the top fixed connection of tube socket 2, the bottom of tube socket 2 and the top fixed connection of cold junction 3, the bottom of cold junction 3 and the top fixed connection of flange 4, the bottom of flange 4 and measuring terminal 5's top swing joint, the bottom of flange 4 is provided with swivel nut 8, the top of swivel nut 8 and the bottom welding of flange 4, the inner wall of swivel nut 8 and the top threaded connection of positive C \ SiC heat-resisting insulation protection layer 10, the protective sheath can be dismantled, use and overhaul the convenience, the small and exquisite simple of device, therefore, the clothes hanger is strong in practicability, and is suitable for popularization.

The external part of the cold end 3 comprises a micro temperature detector 7, a micro temperature sensor 14 and a cold end protection tube 15, the outer wall of the cold end 3 is fixedly connected with the inner wall of the cold end protection tube 15, the outer wall of the cold end protection tube 15 close to the tube seat 2 is fixedly connected with the outer wall of the micro temperature detector 7, the micro temperature sensor 14 is fixedly connected in the cold end protection tube 15 close to the micro temperature detector 7 and can sense the temperature change of the cold end 3 to prevent the cold end temperature change from causing errors, the outer wall of the junction box 1 is fixedly provided with a display screen 6, a plurality of wires are arranged in the tube seat 2, the micro temperature sensor 14 is electrically connected with the micro temperature detector 7 through the arranged wires, the micro temperature detector 7 is electrically connected with the display screen 6 through the arranged wires, the cold end temperature can be directly read through the display screen 6, the use is convenient, the internal part of the measuring end 5 comprises a galvanic couple 9, the outer wall of the galvanic couple 9 is sleeved with the inner wall of the positive C \ SiC heat-resistant insulating protective layer 10, the ceramic anti-sticking coating 11 is sprayed on the outer wall of the positive C \ SiC heat-resistant insulating protective layer 10, the ceramic anti-sticking coating 11 prevents dust deposition, the positive C \ SiC heat-resistant insulating protective layer 10 can effectively play an insulating role, loss of thermoelectrical potential and interference introduction cannot be caused, the ceramic anti-sticking coating 11 sprayed on the outer layer of the measuring end 5 is heat-resistant and smooth, coal ash can be prevented from being deposited on the outer surface of the measuring end 5, thermal resistance increase caused by the coal ash is prevented, heat conduction is prevented, and most, the temperature of the sensing cold end is conducted onto the display screen 6 through the installed micro temperature sensor 14, the measured temperature is compensated, the measurement error caused by the temperature change of the cold end is prevented, and the effect of high measurement precision is achieved.

Cold junction protection tube 15's inside is including thermal-insulated asbestos layer 12 and niobium tantalum alloy anticorrosive coating 13, thermal-insulated asbestos layer 12's outer wall and niobium tantalum alloy anticorrosive coating 13's inner wall fixed connection, prevent the cold junction from corroding, reinforcing life, niobium tantalum alloy anticorrosive coating 13 through setting up, niobium tantalum alloy is very outstanding chemical property, have high corrosion resistance, no matter be under cold and hot condition, to hydrochloric acid, concentrated nitric acid and "aqua regia" do not react, through fixing at the cold junction outer, make the corrosion resistance of device strengthen greatly, and also be equipped with the protective sheath at galvanic couple 9's skin, make the difficult corrosion damage of device, life strengthens greatly.

When the device is used, the device is arranged at a position to be detected of a boiler through a flange 4, a cold end is connected with a display instrument or a matched instrument, the measurement end senses the temperature according to the thermoelectric effect, the display instrument can indicate the thermoelectric potential generated by a thermocouple, the niobium-tantalum alloy has excellent chemical properties through the arranged niobium-tantalum alloy anticorrosive layer 13 and extremely high corrosion resistance, does not react to hydrochloric acid, concentrated nitric acid and aqua regia no matter under cold and hot conditions, the corrosion resistance of the device is greatly enhanced through fixing on the outer layer of the cold end, the outer layer of a thermocouple 9 is also provided with a protective sleeve, the device is not easy to corrode and damage, the service life is greatly prolonged, secondly, the positive C \ SiC heat-resistant insulating protective layer 10 can effectively play an insulating role, the loss of the thermoelectric potential and the interference can not be caused, and the ceramic anti-sticking coating 11 sprayed on the outer layer of the measurement end 5, ceramic coating is heat-resisting, glossy characteristic, can prevent measuring terminal 5's outer accumulated coal ash, and prevent to lead to the thermal resistance increase because of coal ash, hinder hot conduction, at the very first, on the temperature conduction of the miniature temperature-sensing ware 14 response cold junction of installation was to display screen 6, compensate the temperature that records, prevent to lead to measuring error because of the cold junction temperature variation, in order to reach the effect that measurement accuracy is high, when measuring terminal 5's protective sheath damaged, still can change through 8 unscrewing of spiral shell.

It should be noted that, in this document, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a reference structure" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents. The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a special thermocouple of boiler, includes terminal box (1), tube socket (2), cold junction (3), flange (4) and measuring terminal (5), its characterized in that: the bottom of terminal box (1) and the top fixed connection of tube socket (2), the bottom of tube socket (2) and the top fixed connection of cold junction (3), the bottom of cold junction (3) and the top fixed connection of flange (4), the bottom of flange (4) and the top swing joint of measuring terminal (5), the outside of cold junction (3) includes miniature thermoscope (7), miniature temperature-sensing ware (14) and cold junction protection tube (15), the outer wall of cold junction (3) and the inner wall fixed connection of cold junction protection tube (15), the outer wall that cold junction protection tube (15) is close to tube socket (2) and the outer wall fixed connection of miniature thermoscope (7), cold junction protection tube (15) are close to miniature temperature-sensing ware (14) of interior fixed connection of miniature thermoscope (7), the inside of cold junction protection tube (15) includes thermal-insulated asbestos layer (12) and niobium-tantalum alloy anticorrosive coating (13), the outer wall of the heat-insulating asbestos layer (12) is fixedly connected with the inner wall of the niobium-tantalum alloy anticorrosive layer (13), the inside of the measuring end (5) comprises a galvanic couple (9), a positive C \ SiC heat-resistant insulating protective layer (10) and a ceramic anti-sticking coating (11), the outer wall of the galvanic couple (9) is sleeved with the inner wall of the positive C \ SiC heat-resistant insulating protective layer (10), and the ceramic anti-sticking coating (11) is sprayed on the outer wall of the positive C \ SiC heat-resistant insulating protective layer (10).

2. The special thermocouple for the boiler according to claim 1, wherein: the outer wall fixed mounting of terminal box (1) has display screen (6), the inside of tube socket (2) is provided with a plurality of wires, miniature temperature-sensing ware (14) are through the wire and miniature thermoscope (7) electric connection that set up, miniature thermoscope (7) are through the wire and display screen (6) electric connection that set up.

3. The special thermocouple for the boiler according to claim 1, wherein: the bottom of the flange (4) is provided with a threaded sleeve (8), the top of the threaded sleeve (8) is welded with the bottom of the flange (4), and the inner wall of the threaded sleeve (8) is in threaded connection with the top of the positive C \ SiC heat-resistant insulating protective layer (10).