CN208635930U - A kind of thermocouple - Google Patents

A kind of thermocouple Download PDF

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Publication number
CN208635930U
CN208635930U CN201821210082.2U CN201821210082U CN208635930U CN 208635930 U CN208635930 U CN 208635930U CN 201821210082 U CN201821210082 U CN 201821210082U CN 208635930 U CN208635930 U CN 208635930U
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Prior art keywords
protection pipe
thermocouple
pipe
hole
deck
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CN201821210082.2U
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Chinese (zh)
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杨崎
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Luxuriant Robotization (dalian) Co Ltd Of A Specified Duration
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Luxuriant Robotization (dalian) Co Ltd Of A Specified Duration
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Abstract

The utility model discloses a kind of thermocouples, including, armoured thermocouple, protection pipe, terminal box and alundum tube, the protection pipe includes internal layer nickel-based alloy pipe and outer layer nickel-based alloy pipe, the outer layer nickel-base alloy pipe sleeve is on the internal layer nickel-based alloy pipe and drawing undergauge is into a single integrated structure, described protection pipe one end is welded with end socket, the other end is fixed with terminal box, the alundum tube is placed in the protection pipe, the armoured thermocouple is placed in the alundum tube and its signal output end is connected with temperature transmitter, the temperature transmitter is placed in the terminal box.The thermocouple has good corrosion resistance, and protection pipe intensity is high, can be used in nitrogen hydrogen reduction atmosphere, high temperature and high wind pressure environment.

Description

A kind of thermocouple
Technical field
The utility model relates to temperature measuring devices, and in particular to a kind of protection pipe and thermocouple of thermocouple.
Background technique
Since temperature reaches about 1000 DEG C in RTO (heat accumulating type heating power incinerator) linked medical waste incinerator, medium composition Mostly nitrogen hydrogen reduction atmosphere, wind speed is existing for measuring linked medical waste incinerator up to 15m/s~20m/s in furnace Thermocouple is since its protection pipe is generally austenitic heat-resistance steel, and protection pipe is single layer structure, and existing thermocouple is for burning Furnace will appear following phenomenon: 1, austenite heat-resistance steel surface generates gas-evolving electrodes under 1000 DEG C of high temperature, and phenomenon is that forming quantity is huge Big Pinhole-shaped cavity, cavity surrounding generate plasma etching and generate the nitride that heatproof is higher but intensity is very low;And work as furnace When interior temperature is more than 800 DEG C, every to increase by 100 DEG C, this nitrogen hydrogen reduction plasma etching speed will cause to protect at a square increase Pillar is easily corroded;2, the nitride that above-mentioned plasma etching is generated with very strong wind speed and wind pressure in RTO incinerator It is destroyed, the yield strength of austenitic heat-resistance steel protection sleeve pipe is caused to substantially reduce;Especially when thermocouple product is non-vertical When installation, since the influence of extraneous load and self weight leads to protection pipe bending deformation;3, when protection pipe is due to corrosion or wind pressure etc. Effect can rapidly cause entire protection pipe to be damaged when cracking so that thermocouple break and can not continue to use.
Utility model content
The utility model be directed to more than problem propose a kind of protection pipe and thermocouple, which has corrosion resistance The advantages that energy is good, and protection pipe intensity is high.
The technological means that the utility model uses is as follows:
A kind of protection pipe of thermocouple, including internal layer nickel-based alloy pipe and outer layer nickel-based alloy pipe, the Ni-based conjunction of outer layer Golden pipe sleeve is on the internal layer nickel-based alloy pipe and drawing undergauge is into a single integrated structure, and one end is welded with end socket, and the other end is Open end;
A kind of thermocouple, including, armoured thermocouple, protection pipe disclosed by the invention, terminal box and alundum tube, the guarantor Pillar open at one end is fixed with terminal box, and the alundum tube is placed in the protection pipe, and the armoured thermocouple is placed in described rigid In jade pipe and its signal output end is connected with temperature transmitter, and the temperature transmitter is placed in the terminal box;
Further, activity card sets screw thread, activity card sets threaded lower end face are further fixed in the protection pipe outer wall It is fixed with red copper gasket;
Further, the activity card sets screw thread includes deck and card cap, and the deck includes first connecting portion, the first folder Portion and card cap interconnecting piece are held, there is the external screw thread for connecting with temperature measuring equipment, the card cap in the first connecting portion There is internal thread hole on interconnecting piece, also there is the first through hole being connected to the internal thread hole, the internal screw thread on the deck The inside in hole has holding tank, and glass cord is equipped in the holding tank, and the card cap includes that the second clamping part and deck connect Socket part, has the external screw thread for connect with the card cap interconnecting piece on the deck interconnecting piece, also with the on the card cap Two through-holes, activity card sets, which are threaded through the first through hole and the second through-hole, can cover in the protection pipe, and turn described Card cap squeezes the glass cord that is placed in the holding tank to realize the fixation and sealing of activity card sets screw thread and protection pipe;
Further, the wall thickness of the protection pipe is 4mm.
Compared with the prior art, thermocouple disclosed by the utility model has the advantages that 1, protection pipe by two layers Nickel-base alloy pipe drawing undergauge processing is formed, and the tissue of nickel-based alloy pipe can be made more fine and close, protection pipe table can be improved The corrosion resistance in face, meanwhile, nickel-based alloy pipe has the excellent hydrogen of resistance to nitrogen plasma reduction corrosive nature, so that protection pipe The nitrogen hydrogen reduction gas attack being not easily susceptible in RTO;2, protection pipe is made of the double-deck nickel-based alloy pipe, double layer of metal area within a jurisdiction face The metallographic structure at place is discontinuous, even if therefore the outer protection tube is broken in thermocouple use process, crackle can be on boundary Stop at face, will not protection pipe be damaged completely, extend the service life of thermocouple, ensure that the accuracy of thermometric;3, Protection pipe stretches undergauge by the double-deck nickel-based alloy pipe and is made, therefore the Ni-based conjunction of existing specification can be used in its manufacturing process Specification required by meeting protection pipe is made in golden pipe;4, it is fixed with cutting ferrule screw thread in protection pipe, is burnt convenient for adjusting thermocouple insertion The depth in furnace is burnt to carry out temperature measurement.
Detailed description of the invention
Fig. 1 is the structure chart of protection pipe disclosed by the utility model;
Fig. 2 is enlarged drawing at A in Fig. 1;
Fig. 3 is the structure chart of thermocouple disclosed by the utility model;
Fig. 4 is the structure chart of armoured thermocouple;
Fig. 5 is the top view of Fig. 4;
Fig. 6 is the structure chart of card cap, and wherein deck interconnecting piece is half sectional view;
Fig. 7 is the structure chart of deck, and wherein deck is half sectional view;
Fig. 8 is the connection figure of activity card sets screw thread and protection pipe.
In figure: 1, armoured thermocouple, 2, protection pipe, 20, internal layer nickel-based alloy pipe, 21, outer layer nickel-based alloy pipe, 22, envelope Head, 23, open end, 3, terminal box, 4, alundum tube, 5, cutting ferrule screw thread, 50, deck, 500, first connecting portion, the 501, first clamping Portion, 502, card cap interconnecting piece, 503, internal thread hole, 504, first through hole, 505, holding tank, 506, glass cord, 510, Two clamping parts, 511, deck interconnecting piece, the 512, second through-hole, 6, temperature transmitter, 7, installation pad, 8, red copper gasket.
Specific embodiment
Embodiment 1
It is as depicted in figs. 1 and 2 the protection pipe of thermocouple disclosed by the utility model, including 20 He of internal layer nickel-based alloy pipe Outer layer nickel-based alloy pipe 21,21 sets of the outer layer nickel-based alloy pipe on the internal layer nickel-based alloy pipe 20 and drawing undergauge at Integral structure, one end are welded with end socket 22, and the other end is open end 23.
Embodiment 2
The thermocouple disclosed by the utility model as shown in Fig. 3, Fig. 4 and Fig. 5, including, armoured thermocouple 1, connects protection pipe 2 Wire box 3 and alundum tube 4, the protection pipe 2 include internal layer nickel-based alloy pipe 20 and outer layer nickel-based alloy pipe 21, the outer layer nickel 21 sets of base alloy pipe on the internal layer nickel-based alloy pipe 20 and drawing undergauge is into a single integrated structure, 2 one end of protection pipe weldering It is connected to end socket 22, open end is fixed with terminal box 3, and terminal box 3 is Type B terminal box in the present embodiment, and the alundum tube 4 is placed in In the protection pipe 2, the armoured thermocouple 1 is placed in the alundum tube 4 and its signal output end is connected with temperature transmitter 6, temperature transmitter 6 is fixed in terminal box by installing pad 7, and the signal that temperature transmitter is used to export armoured thermocouple turns It changes 0~20mm current signal into, and is directly accessed PLC control cabinet or secondary meter control unit.Since protection pipe uses two layers Nickel-base alloy pipe drawing undergauge is made, therefore its with higher wear-resisting and corrosion resistance, can effectively resist RTO burning The corrosiveness of the reducibility gas such as furnace high temperature nitrogen hydrogen, extends the service life of thermocouple, simultaneously because there is double-layer structure, Therefore when the outer protection tube is due to abrasion or Action of Wind pressure damage, crackle does not extend to internal layer protection pipe, improves thermoelectricity Even service life.Preferably, internal layer nickel-based alloy pipe and outer layer nickel-based alloy pipe the selection of material number are the Ni-based conjunction of 2.4816 types The nickel-base alloy of gold, the model has preferable corrosion resistance and cold-forming property, and protection pipe is carried out at low temperature Processing simplifies processing technology, while its higher corrosion resistance can prolong the service life.In the present embodiment, such as Fig. 3 institute Show, armoured thermocouple selects K-type or N-type thermocouple.Protection pipe can be made by being handled using the double-deck nickel-based alloy pipe drawing undergauge Thickness reach 4mm.
Preferably, AL in alundum tube 42O3Content is 99.7%, the alundum tube have high rigid, can be used for 15m/s~20m/s wind speed and the active force of 200Pa wind pressure load in anti-incinerator.
Further, activity card sets screw thread 5, the activity card sets threaded lower end are further fixed on 2 outer wall of protection pipe Face is fixed with red copper gasket 8, and under normal circumstances, the environment temperature outside RTO incinerator is also higher, about 100~150 DEG C, uses purple The effect that copper backing is sealed activity card sets screw thread and RTO incinerator firmly can be than the effect of non-metal kind sealing ring or gasket Fruit is more preferable.
Specifically, the activity card sets screw thread 5 includes deck 50 and card cap 51, as shown in fig. 7, the deck 50 includes the One interconnecting piece 500, the first clamping part 501 and card cap interconnecting piece 502 have in the first connecting portion 500 for surveying with band The external screw thread of warm device connection has internal thread hole 503 on the card cap interconnecting piece 502, also has on the deck 50 and institute The first through hole 504 of the connection of internal thread hole 503 is stated, the inside of the internal thread hole 504 has holding tank 505, the holding tank Glass cord 506 is equipped in 505, as shown in fig. 6, the card cap 51 includes the second clamping part 510 and deck interconnecting piece 511, There is the external screw thread for connecting with the card cap interconnecting piece on the deck interconnecting piece 511, also have second on the card cap Through-hole 512, activity card sets, which are threaded through the first through hole 504 and the second through-hole 512, can cover in the protection pipe 2, and The glass cord that the card cap extruding is placed in the holding tank is turned to realize the fixation of activity card sets screw thread and protection pipe And sealing.As shown in figure 8, protection pipe is placed in activity card sets screw thread, deck is fixed by first connecting portion with temperature measuring equipment Connection, when cutting ferrule and deck do not screw, protection pipe can move the slotting depth of modulated whole thermocouple on activity card sets screw thread, when Thermocouple is adjusted to after suitably inserting depth, screws card cap, card cap squeeze the glass cord in holding tank with realize protection pipe with Activity card sets screw thread seals and fixes connection.Using the adjustable thermocouple insertion of activity card sets helicitic texture to temperature measuring equipment In depth so that the thermometric end of thermocouple is in the source center with temperature measuring equipment, so that the temperature measured is more acurrate.
The preferable specific embodiment of the above, only the utility model, but the protection scope of the utility model is not It is confined to this, anyone skilled in the art is within the technical scope disclosed by the utility model, practical according to this Novel technical solution and its utility model design are subject to equivalent substitution or change, should all cover the protection model in the utility model Within enclosing.

Claims (4)

1. a kind of thermocouple, it is characterised in that: including, armoured thermocouple, protection pipe, terminal box and alundum tube, the protection Pipe includes internal layer nickel-based alloy pipe and outer layer nickel-based alloy pipe, and the outer layer nickel-base alloy pipe sleeve is in the internal layer nickel-based alloy pipe Upper and drawing undergauge is into a single integrated structure, and one end is welded with end socket, and the other end is open end, and the protection pipe open end is fixed There is terminal box, the alundum tube is placed in the protection pipe, and the armoured thermocouple is placed in the alundum tube and its signal is defeated Outlet is connected with temperature transmitter, and the temperature transmitter is placed in the terminal box.
2. thermocouple according to claim 1, it is characterised in that: be further fixed on activity card sets spiral shell in the protection pipe outer wall Line, activity card sets threaded lower end face are fixed with red copper gasket.
3. thermocouple according to claim 2, it is characterised in that: the activity card sets screw thread includes deck and card cap, institute Stating deck includes first connecting portion, the first clamping part and card cap interconnecting piece, is had in the first connecting portion for surveying with band The external screw thread of warm device connection has internal thread hole on the card cap interconnecting piece, also has on the deck and the internal screw thread The first through hole of hole connection, the inside of the internal thread hole has holding tank, is equipped with glass cord in the holding tank, described Card cap includes the second clamping part and deck interconnecting piece, is had on the deck interconnecting piece for connecting with the card cap interconnecting piece External screw thread also has the second through-hole on the card cap, and activity card sets, which are threaded through the first through hole and the second through-hole, to be covered In the protection pipe, and turns the card cap and squeeze the glass cord being placed in the holding tank to realize activity card sets spiral shell The fixation and sealing of line and protection pipe.
4. thermocouple according to claim 3, it is characterised in that: the wall thickness of the protection pipe is 4mm.
CN201821210082.2U 2018-07-27 2018-07-27 A kind of thermocouple Active CN208635930U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201821210082.2U CN208635930U (en) 2018-07-27 2018-07-27 A kind of thermocouple

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201821210082.2U CN208635930U (en) 2018-07-27 2018-07-27 A kind of thermocouple

Publications (1)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108709655A (en) * 2018-07-27 2018-10-26 久茂自动化(大连)有限公司 A kind of manufacturing method, protection pipe and the thermocouple of the protection pipe of thermocouple
CN110501084A (en) * 2019-07-05 2019-11-26 国网浙江省电力有限公司嘉兴供电公司 A kind of few maintenance thermocouple sensor of suitable networking
CN110686791A (en) * 2019-11-08 2020-01-14 浙江泰索科技有限公司 Ultra-long high-temperature and high-pressure resistant multi-point oil well temperature sensor and preparation method thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108709655A (en) * 2018-07-27 2018-10-26 久茂自动化(大连)有限公司 A kind of manufacturing method, protection pipe and the thermocouple of the protection pipe of thermocouple
CN108709655B (en) * 2018-07-27 2024-07-16 久茂自动化(大连)有限公司 Manufacturing method of protection tube of thermocouple, protection tube and thermocouple
CN110501084A (en) * 2019-07-05 2019-11-26 国网浙江省电力有限公司嘉兴供电公司 A kind of few maintenance thermocouple sensor of suitable networking
CN110686791A (en) * 2019-11-08 2020-01-14 浙江泰索科技有限公司 Ultra-long high-temperature and high-pressure resistant multi-point oil well temperature sensor and preparation method thereof

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