CN2624197Y

CN2624197Y - Special-purpose thermocouple for blast furnace noumenon

Info

Publication number: CN2624197Y
Application number: CN 03234936
Authority: CN
Inventors: 胡鸿
Original assignee: Chongqing Dyon Instrument Co ltd
Current assignee: Chongqing Dyon Instrument Co ltd
Priority date: 2003-06-14
Filing date: 2003-06-14
Publication date: 2004-07-07
Anticipated expiration: 2013-06-14

Abstract

The utility model relates to a thermocouple particularly for the use of blast-furnace body and is mainly composed of a junction box 1, a connecting pipe 2, a flange 3, a sheath 4, insulating layer 5, a thermocouple core 6, and a thermocouple wire 7, wherein, one end of the connecting pipe 2 is connected with the junction box 1 and the other end is connected with the flange 3 the other end of which is connected with the sheath 4 which is filled with insulating layers 5. The utility model is characterized in that in the sheath 4 are thermocouple core, the quantity of which varies from one to ten, the lengths of which are varied, and in each of which are two thermocouple wire 7 of the same length. The utility model can conduct multipoint test in one sheath and reduce the damage to the furnace body so that the cost is brought down, the space is saved, the heat resistance of the thermocouple is increased, the stability of thermoelectricity of the thermocouple is guaranteed and reinforced, and the installation and maintaining of workers is also convenient.

Description

The blast-furnace body special electric thermo-couple

One, technical field:

The utility model relates to a kind of blast-furnace body special electric thermo-couple, especially a kind of blast-furnace body special electric thermo-couple of realizing multi-point sampler.

Two, background technology:

Blast furnace is the major equipment that ironmaking is produced, blast-furnace body thermopair stable and reliable for performance can play the necessary condition of self regulating to high furnace temperature, what the blast furnace of some iron-smelter adopted in the past is the temperature that the single-point thermopair is tested the temperature field, this thermopair costs an arm and a leg, thermode idol core diameter is very thin, physical strength is lower, thermoelectrical potential is smaller, thermoelectrical potential rate average out to 9 μ V/ ℃, need the highly sensitive Displaying Meter of adapted, this thermopair is not suitable under the condition of going back oxygen atmosphere or containing metal steam yet and uses, especially should avoid contacting organism, iron, silicon, H2 and CO etc., range of application is narrow, what its negative pole thermode adopted is platinum, phenomenon such as crystallization and grain growth more at high temperature easily takes place, high temperature is reduced, and cause pollution easily, cause the thermopower instability, influence the operate as normal of blast furnace, in addition because the blast furnace point for measuring temperature is many, thermometric temperature field level occurs and distributes, and has only an even core in the protecting pipe of ordinary hot galvanic couple, if use the ordinary hot galvanic couple, require the mounting hole site of body of heater just many, bigger to the destructiveness of body of heater, also be unfavorable for the long-term use of equipment, and one can only be monitored a point, and used starting material are many.Distribution range is big on same equipment, also is unfavorable for the installation and maintenance of field worker.

Three, summary of the invention:

The purpose of this utility model provides a kind of blast-furnace body special electric thermo-couple, by changing the structure of existing blast-furnace body thermopair, solve existing blast-furnace body thermopair and require the mounting hole site of body of heater many, bigger to the destructiveness of body of heater, also be unfavorable for problems of monitoring.

Concrete scheme of the present utility model is: a kind of blast-furnace body special electric thermo-couple, one of connecting pipe connects terminal box, other end joint flange, the other end of flange is connected with protecting pipe, space segment in the protecting pipe is full of insulation course, it is characterized in that: 1～10 even core that is uneven in length is arranged in the protecting pipe, and every even in-core has two isometric thermo wires.

This programme is in order to detect the different point for measuring temperature of shaft, the even core of many varying lengths is set in protecting pipe according to the position of point for measuring temperature, the space that whole thermopair is shared is suitable with single thermopair, owing to have only a protecting pipe, only need on body of heater, to open a mounting hole, just can reach the functions of use of many ordinary hot galvanic couples, thereby the destruction to equipment is reduced to minimum level, also be convenient to workman's installation and maintenance, in addition, because the even core of many varying lengths is contained in the protecting pipe, has so not only saved space and starting material, and changed conveniently.

Adopt the beneficial effect of such scheme to be: in a protecting pipe, can carry out multi-point sampler, reduce destructiveness to body of heater, reduced cost, saved the space, improved the resistant to elevated temperatures ability of thermopair simultaneously, guarantee and improve the stability of hot thermocouple electromotive force, also be convenient to workman's installation and maintenance simultaneously.

Four, description of drawings:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the A-A cut-open view of Fig. 1;

Fig. 3 is the B-B cut-open view of Fig. 1;

Fig. 4 is the C-C cut-open view of Fig. 1.

Five, embodiment:

As can be seen from Figure 1: the utility model mainly is made up of terminal box 1, connecting pipe 2, flange 3, protecting pipe 4, insulation course 5, even core 6, thermo wires 7, wherein one of connecting pipe 2 connects terminal box 1, other end joint flange 3, the other end of flange 3 is connected with protecting pipe 4, space segment in the protecting pipe 4 is full of insulation course 5, it is characterized in that: 1～10 even core 6 that is uneven in length is arranged in the protecting pipe 4, in every even core 6 two isometric thermo wires 7 are arranged.

From Fig. 1, Fig. 2, Fig. 3, Fig. 4 also as can be known: 6 even cores (6) are arranged in the protecting pipe (4).Six even cores 6 are respectively L1, L2, L3, L4, L5, L6 to the distance of flange 3, L6＜L5＜L4＜L3＜L2＜L1 wherein, and six of unequal length even cores 6 just can detect the point for measuring temperature of shaft diverse location like this.

What the hot electrode of this thermopair adopted is nickel filament, and when partial pressure of oxygen was low, the chromium in the nickel filament changed a lot thermopower preferential oxidation; In the material of insulation course, add a kind of oxygen enrichment element, can guarantee that even core can obtain enough oxygen in long-term work, stopped the generation of green erosion, thereby improved the stability and the serviceable life that prolongs thermopair of the thermopower of thermopair; High temperature alloy weldless steel tube that protecting pipe adopts has improved the oxidation resistent susceptibility of thermopair under 1100 ℃ of high temperature, and outer tube the peeling phenomenon can not occur, thereby can prolong the serviceable life of thermopair; The thermopair core is contained in the protecting pipe of insulation course, and the three is processed into flexible solid assembly through combination.

Claims

1, a kind of blast-furnace body special electric thermo-couple, one of connecting pipe (2) connects terminal box (1), other end joint flange (3), the other end of flange (3) is connected with protecting pipe (4), space segment in the protecting pipe (4) is full of insulation course (5), it is characterized in that: 1～10 even core (6) that is uneven in length is arranged in the protecting pipe (4), two isometric thermo wires (7) are arranged in every even core (6).

2, blast-furnace body special electric thermo-couple according to claim 1 is characterized in that: 6 even cores (6) are arranged in the protecting pipe (4).