CN207317958U - Constant pressure air blowing special electric thermo-couple - Google Patents

Abstract

The utility model discloses a kind of constant pressure air blowing special electric thermo-couple, it includes terminal box, connecting tube, thermocouple element, and the inner sleeve set gradually from inside to outside, outer tube, protection pipe, and the inner sleeve, the homogeneous end seal of outer tube is closed, one end open, connecting tube one end is tightly connected with terminal box, the other end passes through process connecting flange and protection pipe, inner sleeve, the overcoat seal of tube is connected, thermocouple element coaxially runs through connecting tube, and the thermocouple element one end is connected with terminal box, the other end is through process connecting flange and extends in inner sleeve, wherein, process connecting flange and inner sleeve, outer tube and protection pipe are molded using the embedding of high temperature inorganic ceramics viscose glue, and it is molded between connecting tube and terminal box using multistage embedding.The utility model further expands the advantages such as the sulfur corrosion resistant, wear-resisting, high temperature resistance, anti-vibration of temperature thermocouple, improves its service life by optimizing temperature thermocouple structure and material.

Description

Constant pressure air blowing special electric thermo-couple

Technical field

It the utility model is related to a kind of constant pressure air blowing special electric thermo-couple, and in particular to it is high that one kind is used for Crouse's thermal reactor The constant pressure air blowing special electric thermo-couple of temperature measurement.

Background technology

In petrochemical industry, particularly claus oven sulfur recovery system and synthesis ammonia complexes, the sulphur combustion of sulfuric acid plant Stove, hydrogen combustion heater system water vapour generator, coal gasifier and all kinds of POX devices are burnt, is major chemical industry of modern industry One of capital equipment, be widely used on petrochemical industry desulfurizer and sulfur recovery unit, the control of temperature is chemical plant One important indicator of technical matters, is the key point of whole factory, seriously affects the operation and existence of whole factory.And Range of temperature is big, then requires the precision of automation control appliance high, the data precision of product offer is higher, corrosion resistant The ability of stronger, the anti-interference anti-vibration of ability is stronger..So the requirement to temperature instrumentation is also higher, existing pyrometer couple It cannot meet the requirement of technique, be mainly reflected in the following aspects：

A, measurement temperature scope is inadequate, and temperature is up to 1600 DEG C when device works, and common metal material is at 1300 DEG C Start to deform, bending is melted, and the serious measurement for influencing temperature, causes temperature instrumentation to damage in short term；

B, corrosion resistance is poor, and detected atmosphere may contain hydrogen, sulphur, sulfur dioxide, chloride, sour gas Deng the service life to metal material is a huge test, and the corrosion resistant ability of metal material itself is limited, in high temperature Under the conditions of, corrosion resistant ability will progressively weaken or even disappear, and substantially reduce the thermocouple service life, bring up to the operation of enterprise into This；

C, the energy force difference of resistance to compression anti-vibration, existing thermocouple is during installing and using, because of the shake of external pressure and equipment Dynamic, it is also a key factor to cause the irregular damage of thermocouple；

D, poor sealing, the phenomenon that existing product leaks air in use happen occasionally.

The heat-resisting material largely used now does not adapt to above-mentioned requirements, such as：Nonmetallic materials alundum tube, carborundum tube Etc. the requirement that cannot meet high intensity, high corrosion；And metal tube Inconel600, Inconel800, GH30, GH39,3YC52 systems Row etc., due to above-mentioned high temperature alloy be abutment surface formed densification Cr2O3 or Al2O3 protective films come play oxidation and corrosion make With, but it is many require high temperature, high intensity, impact force larger and use environment there are Korrosionsmedium, Cr2O3 or Al2O3 are protected Cuticula severe detachment, so that the high-temperature behavior of alloy is decreased obviously, therefore above-mentioned alloy is unable to long-time service in above equipment Thermometric occasion.Therefore, it is necessary to produce to meet the thermocouple of requirements above, the production technology to enterprise provides improvement, reduces enterprise The unnecessary waste of industry.

License notification number CN202956215U, patent name are constant pressure air blowing type thermocouple, disclose a kind of structure Blowing thermocouple, it is poor to efficiently solve existing temperature thermocouple corrosion resistance, high temperature resistance, antidetonation moment, and service life is short The problem of, but in actual application, which still can further optimize.

The content of the invention

For above-mentioned shortcoming of the prior art, the utility model aims to provide a kind of special thermoelectricity of constant pressure air blowing Even, by optimizing temperature thermocouple structure and material, the further sulfur corrosion resistant for expanding temperature thermocouple, wear-resisting, high temperature resistance, resist The advantages such as vibrations, improve its service life.

To achieve these goals, the technical solution of the utility model：A kind of constant pressure air blowing special electric thermo-couple, it includes Terminal box, connecting tube, thermocouple element and the inner sleeve set gradually from inside to outside, outer tube, protection pipe, and the inner sleeve, The homogeneous end seal of outer tube is closed, one end open, and described connecting tube one end is tightly connected with the terminal box, and the other end is connected by process Acting flange is connected with protection pipe, inner sleeve, the overcoat seal of tube, and the thermocouple element coaxially runs through the connecting tube, and the heat Galvanic couple element one end is connected with the terminal box, and the other end is through the process connecting flange and extends in the inner sleeve, It is characterized in that：The inner sleeve, outer tube are alundum tube, and the inner sleeve, outer tube and the protection pipe are adjacent two-by-two Between be equipped with high temperature inorganic ceramics viscose glue embedding layer, and the inner sleeve, outer tube and the protection pipe one embedding are in described On process connecting flange；Connected between the connecting tube and the terminal box by embedding cavity, and in the embedding cavity and its Be molded between the inner core protective cap of thermocouple element, thermocouple wire using AB glue embedding, the thermocouple element with it is described interior It is molded between core protective cap using the embedding of refractory seals glue；Intake interface, outlet interface are provided with the connecting tube.

Further, the inner sleeve, the thickness of pipe of outer tube are 5mm, and the outside diameter of the outer tube is 30mm, inner sleeve The outside diameter of pipe is 20mm.

Further, the thermocouple wire of the thermocouple element is the B type thermocouple silks of a diameter of 0.5mm of thermo wires.

Further, the inner cavity of the connecting tube is connected with the inner cavity of the inner sleeve, and the air inlet in the connecting tube Interface is adjacent to the inner sleeve or outer tube or protection pipe end.

Further, the process connecting flange quantity is two, its correspondence is connected with the protection pipe, connecting tube, phase There is sealing ring between the adjacent process connecting flange, and be fastened by bolts between the adjacent process connecting flange.

Further, the terminal box is explosion-proof connection box.

The beneficial effects of the utility model：By optimizing temperature thermocouple structure and material, have process connecting flange By high temperature inorganic ceramics viscose glue one embedding between protection pipe, outer tube, inner sleeve, while between connecting tube and terminal box By the multiple embedding of high temperature resistant viscose glue, the inner core tube of thermocouple element and outer tube are all subjected to multiple embedding, reach secondary filling The purpose of protection is sealed, enhances the air-tightness of whole product, also further expands the sulfur corrosion resistant, wear-resisting, anti-of temperature thermocouple The advantages such as high temperature, anti-vibration, improve its service life.

Brief description of the drawings

Fig. 1 is the structure chart of the utility model；

Fig. 2 is the enlarged diagram of part A in Fig. 1；

Fig. 3 is the enlarged diagram of part B in Fig. 1.

Embodiment

The utility model is further described with reference to specific embodiment and attached drawing.

One kind constant pressure air blowing special electric thermo-couple as described in Fig. 1-Fig. 3, it includes terminal box 8, connecting tube 7, thermocouple member Part 1 and the inner sleeve 3 set gradually from inside to outside, outer tube 2, protection pipe 4, and the inner sleeve 3,2 homogeneous end seal of outer tube Close, one end open, 7 one end of connecting tube is tightly connected with terminal box 8, and the other end passes through process connecting flange 6 and protection pipe 4, interior Casing 3, the sealing of outer tube 2 are connected, and thermocouple element 1 coaxially runs through connecting tube 7, and 1 one end of thermocouple element and terminal box 8 Connection, the other end is through process connecting flange 6 and extends in inner sleeve 3, wherein, inner sleeve 3, outer tube 2 are alundum tube, High temperature inorganic ceramics viscose glue embedding layer 9, and the inner sleeve are equipped between inner sleeve 3, outer tube 2 and protection pipe 4 are adjacent two-by-two 3rd, outer tube 2 and the integral embedding of protection pipe 4 are on process connecting flange 6；Pass through embedding cavity between connecting tube 7 and terminal box 8 11 connections, and AB glue 14 is used between the inner core protective cap 12 of the embedding cavity 11 and its interior thermocouple element 1, thermocouple wire Embedding is molded, and is molded between thermocouple element 1 and inner core protective cap 12 using 13 embedding of refractory seals glue；Set in connecting tube 7 It is equipped with intake interface 15, outlet interface 16.

Specifically, 7 both ends of connecting tube seal between terminal box 8, process connecting flange 6 respectively so that in the connecting tube 7 With connecting cavity, which is connected with the inner cavity of inner sleeve 3, and the intake interface 15 in the connecting tube 7 is adjacent to inner sleeve Pipe 3 or outer tube 2 or 4 end of protection pipe.Intake interface 15, outlet interface 16 are connect into exterior tracheae, to connecting cavity and interior during work To blow in casing 3, during ordinary circumstance, furnace pressure 0.06MPa, nitrogen is blown into by intake interface 15, pressure 0.1MPa, And the pressure can be adjusted as the case may be, when internal pressure is higher than external pressure, small positive pressure or and ambient pressure in pipe are caused Balance so that pernicious gas cannot be invaded to the two poles of the earth of deterioration thermoelectricity occasionally thermocouple by the protection pipe that air-tightness declines, and And whole thermocouple element 1 is completely in the protection of protective gas, so as to protect thermocouple temperature measurement first well Part, is adapted to the fields such as synthetic ammonia installation, vacuum sintering furnace, claus oven.

Here, in order to improve the thermometric performance of thermocouple temperature measurement element, the thermocouple wire of thermocouple element 1 is elected as thermo wires The B type thermocouple silks of a diameter of 0.5mm, wherein platinum rhodium content to 10%-30%, while by the thermo wires diameter of traditional handicraft by 0.5mm is improved to 0.6mm, and then improves the service life and temperature resistant capability of the most important part temperature element of thermocouple.

Inner sleeve 3, the thickness of pipe of outer tube 2 are 5mm, for traditional 2mm thickness of pipe, strengthen pipe shaft barrier propterty, And the outside diameter of outer tube 2 is 30mm, the outside diameter of inner sleeve 3 is 20mm, and the alundum tube of thickening can effectively stop the corrosion in stove Property gas enter protection pipe inside, it is therefore prevented that thermocouple thermo wires is corroded and damages.Between inner sleeve 3, outer tube 2 use into Mouthful high temperature inorganic ceramics adhesive-layer, it is bonded 1730 degree of heatproof, by dosing technology, be bonded after multiple embedding high/low temperature control and Into making the inside and outside intensity and compactness for forming one, more adding protection pipe of protection pipe.

As shown in Figure 1,6 quantity of process connecting flange is two, it is corresponded to is connected with protection pipe 4, the sealing of connecting tube 7, phase There is sealing ring between adjacent process connecting flange 6, and be fastened by bolts between adjacent process connecting flange 6, ensure connecting tube 7 And the air-tightness between inner sleeve 3.Wherein, protection pipe 4 is metal protecting tube, is installed with mounting flange 5 thereon, is used for and furnace body Connection positioning is used.Finally, terminal box 8 is explosion-proof connection box, or anti-explosion terminal box.

The technical solution provided above the utility model embodiment is described in detail, used herein specifically A example is set forth the principle and embodiment of the utility model embodiment, and the explanation of above example is only applicable to help Assistant solves the principle of the utility model embodiment；Meanwhile for those of ordinary skill in the art, implement according to the utility model Example, the there will be changes in embodiment and application range, in conclusion this specification content should not be construed as Limitation to the utility model.

Claims (6)

1. a kind of constant pressure air blowing special electric thermo-couple, include terminal box (8), connecting tube (7), thermocouple element (1) and by it is interior to The inner sleeve (3) that sets gradually outside, outer tube (2), protection pipe (4), and the inner sleeve (3), outer tube (2) homogeneous end seal close, One end open, described connecting tube (7) one end and the terminal box (8) are tightly connected, the other end by process connecting flange (6) with Protection pipe (4), inner sleeve (3), outer tube (2) sealing are connected, and the thermocouple element (1) coaxially runs through the connecting tube (7), And thermocouple element (1) one end is connected with the terminal box (8), the other end is through the process connecting flange (6) and extends In to the inner sleeve (3), it is characterised in that：The inner sleeve (3), outer tube (2) they are alundum tube, the inner sleeve (3), High temperature inorganic ceramics viscose glue embedding layer (9), and the inner sleeve are equipped between outer tube (2) and the protection pipe (4) are adjacent two-by-two The integral embedding of pipe (3), outer tube (2) and the protection pipe (4) is on the process connecting flange (6)；The connecting tube (7) with Connected between the terminal box (8) by embedding cavity (11), and the embedding cavity (11) and its interior thermocouple element (1) is interior It is molded between core protective cap (12), thermocouple wire using AB glue (14) embedding, the thermocouple element (1) is protected with the inner core It is molded between helmet (12) using refractory seals glue (13) embedding；Intake interface (15) is provided with the connecting tube (7), is gone out Gas interface (16).

2. constant pressure air blowing special electric thermo-couple according to claim 1, it is characterised in that：The inner sleeve (3), outer tube (2) the thickness of pipe is 5mm, and the outside diameter of the outer tube (2) is 30mm, and the outside diameter of inner sleeve (3) is 20mm.

3. constant pressure air blowing special electric thermo-couple according to claim 1, it is characterised in that：The heat of the thermocouple element (1) Thermocouple wire is the B type thermocouple silks of a diameter of 0.5mm of thermo wires.

4. constant pressure air blowing special electric thermo-couple according to claim 1, it is characterised in that：The inner cavity of the connecting tube (7) with The inner cavity of the inner sleeve (3) is connected, and the intake interface (15) in the connecting tube (7) be adjacent to the inner sleeve (3) or Outer tube (2) or protection pipe (4) end.

5. constant pressure air blowing special electric thermo-couple according to claim 1, it is characterised in that：Process connecting flange (6) number Measure as two, it is corresponded to is connected with the protection pipe (4), connecting tube (7), has between the adjacent process connecting flange (6) Sealing ring, and be fastened by bolts between the adjacent process connecting flange (6).

6. constant pressure air blowing special electric thermo-couple according to claim 1, it is characterised in that：The terminal box (8) connects for flame proof Wire box.