CN102288313B - Method for bonding thermocouple with graphite piece - Google Patents
Method for bonding thermocouple with graphite piece Download PDFInfo
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- CN102288313B CN102288313B CN201110231949.9A CN201110231949A CN102288313B CN 102288313 B CN102288313 B CN 102288313B CN 201110231949 A CN201110231949 A CN 201110231949A CN 102288313 B CN102288313 B CN 102288313B
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Abstract
The invention discloses a method for bonding a thermocouple with a graphite piece in an insulation mode. The method comprises the following steps of: blending synthetic resin powder and graphite powder in a certain ratio by using a solvent to obtain bonding glue; coating insulation varnish on the surface of the thermocouple, and fixing the thermocouple on graphite by using the bonding glue; and solidifying by a natural air drying or heating method. By the bonding method, the metal thermocouple and the graphite piece are bonded in the insulation mode, the requirement that a plurality of thermocouples are arranged on the same graphite material and connected into a thermopile for temperature measurement can be met, and the method has the advantages of low thermal contact resistance, accurate temperature measurement, firm fixation, low cost and the like, and can meet the requirement of a graphite probe for measuring a high-energy laser beam.
Description
Technical field
The present invention relates to the adhering method of a kind of thermopair and graphite piece, especially a kind of insulation adhering method for graphite heat absorption thermometric.
Background technology
Graphite is a kind of laser energy absorption material of function admirable, be widely used in laser power/energy measuring apparatus at present, its principle is the temperature rise that incident laser energy is converted into graphite material, utilize thermocouple measurement to obtain the temperature variation that graphite is popped one's head in, thus the corresponding energy that obtains incident laser.In order accurately and rapidly to reflect the temperature variation of graphite probe, require to reduce the thermal resistance between thermopair and the graphite probe as far as possible, this just to thermopair with between graphite is popped one's head in contact and fixed form has proposed very high requirement.
At present common fixed form is to utilize spring structure or compressing tablet that thermopair is crimped on the graphite piece, or adopts the silver paste method that thermopair and graphite piece is bonding.When using the spring compression bonding method, at first need to design a fixed support, the support front end is used for fixing measured graphite piece, the rear end is used for the stationary heat galvanic couple, the thermopair rear end processes thread segment and is equipped with spring, utilize the pressure realization thermocouple temperature measurement end of spring and the close contact of graphite piece, in this kind fixing means, spring and supporting structure are complicated, the size that takes up room is larger, be difficult to use in the occasion of hundreds of roads thermocouple temperature measurement, the method of mechanical crimping is ageing not good in addition, has used of a specified duration and the not tight defective of crimping can occur, causes the thermal resistance between thermopair and the graphite probe larger; Thermal contact resistance is little although the silver paste adhering method has, fixation, advantages of simple structure and simple, but in actual applications, because silver paste itself has preferably electric conductivity, and graphite itself is exactly conductor, so need to structurally carry out insulating Design to measurement mechanism, and this adhering method is when the same graphite piece lays a plurality of thermopair, and output signal is crosstalked between the thermopair, can't measure the Temperature Distribution on the same graphite block.
Summary of the invention
The object of the invention provides a kind of for the insulation coupling method between graphite piece and the thermopair, has compact conformation, the characteristics such as fixed.
Technical solution of the present invention is:
The adhering method of a kind of thermopair and graphite piece may further comprise the steps:
[1] with fine graphite powders, bonding with synthetic resin powder and the allotment solvent be deployed into bonded adhesives; Described synthetic resin powder is 1: 5～1: 8 with the ratio of the weight portion of dag; Described allotment solvent is formaldehyde or alcohol.
[2] graphite piece and thermopair adhesive spots position are carried out grinding process, make its surperficial roughening, with alcohol with adhesive spots position scrub;
[3] at thermocouple junction position coating high-temperature insulating paint, and natural air drying or hyperthermia drying;
[4] evenly smear described deployed bonded adhesives at graphite piece adhesive spots place, and graphite piece is fully contacted with bonded adhesives;
The thermocouple junction that [5] will be coated with insullac inserts in the bonded adhesives of graphite piece, and maintains static;
[6] with the above-mentioned graphite piece that fixes and thermopair together natural air drying or heating, drying.
Above-mentioned bonding be phenolics with synthetic resin.
The applied thickness of above-mentioned high-temperature insulation is 10～20 μ m.
The above-mentioned high-temperature insulating paint natural air drying time is 12 hours; The temperature of described high-temperature insulating paint hyperthermia drying is 150 ℃～250 ℃, and the time is 3～4 hours; The natural air drying time of the described graphite piece that fixes and thermopair is 24 hours; The heated baking temperature of the described graphite piece that fixes and thermopair is 150 ℃～200 ℃, and the time is 3～5 hours.
The beneficial effect that the present invention has:
1, the present invention has realized the adhering method that insulate between metallic thermocouple and the graphite piece, can be implemented in the needs that lay a plurality of thermopairs on the same graphite material and connect into the thermoelectric pile thermometric, has widely applicability.
2, the adhering method realized of the present invention have that thermal contact resistance is little, thermometric advantage accurately, and can satisfy pyrometric requirement.
3, the present invention has simple in structure, the advantages such as cost is low, fixation.
Description of drawings
Fig. 1 is graphite piece of the present invention and the bonding thermometric member synoptic diagram that becomes of thermopair;
Wherein: the 1-graphite piece; The 2-adhesive spots; The 3-thermocouple junction; The 4-thermocouple wire.
Embodiment
In thermometric member shown in Figure 1, for guaranteeing the temperature measurement accuracy of thermopair, require close contact between thermocouple junction 3 and the graphite piece 1, keep good heat conductance, and have less thermal resistance; Measure when satisfying on the same graphite piece 1 a plurality of thermopair simultaneously, require to keep between thermocouple junction 3 and the graphite piece 1 insulation; For satisfying the requirement of Irradiation of High measurement etc., also need thermopair and graphite piece 1 bonding firm, high temperature resistant in addition.
The present invention adopts the adhering method of thermopair and graphite piece, may further comprise the steps:
One, in fine graphite powders, adds a certain proportion of bonding high temperature resistant synthetic resin powder of using, and adopt solvent to be deployed into the bonded adhesives of suitable viscosity.Bondingly can adopt phenol-formaldehyde resin powder with synthetic resin, have stronger bonding force, and can anti-high temperature more than 1000 ℃ behind the graphite setting and hardening.When allotment, it is some at first to get fine graphite powders, and is to add synthetic resin powder in 1: 5～1: 8 in dag according to the volume ratio of synthetic resin powder and dag, and the effect of this synthetic resin is dag is carried out strong bond, and after solidifying, keep certain intensity, can adopt formaldehyde in bonding as solvent and be deployed into suitable viscosity, its viscosity is similar to stationery glue, if too dried, then be difficult to adhere to, if too rare, then can show mobilely bonding, have influence on adhesive effect.
Two, graphite piece and thermopair adhesive spots position are carried out grinding process, make its surface become relatively coarse, with adhesive spots position scrub, elimination oil stain etc. are on the impact of adhesive effect with alcohol.Adopt grinding process and increase surperficial roughness and can improve bonding strength.
Three, with alcohol with the thermocouple junction scrub after, apply a small amount of high-temperature insulating paint at the thermocouple junction position, and natural air drying or hyperthermia drying.The ZS-811 type that the high-temperature insulation lacquer can select Beijing will Sheng Weihua company to produce, the purpose of coating insullac is to prevent to conduct between thermocouple junction and the graphite piece, when avoiding laying a plurality of thermopair on the same graphite piece, the crosstalking of output signal between the thermopair satisfied the temperature distributing measuring on the same graphite block; The thickness of insullac can not be blocked up, avoids affecting thermal conductance, so that the thermal resistance between thermopair and the graphite piece is excessive, simultaneously can not be too thin, otherwise can affect insulativity, and show that according to repeatedly practical experience applied thickness is that 10～20 μ m are comparatively suitable.Applying needs insullac natural air drying or hyperthermia drying after complete, and wherein the natural air drying time is 12 hours, and the temperature of hyperthermia drying is 150 ℃～250 ℃, and the time is 3～4 hours.
Four, evenly smear deployed bonded adhesives at graphite piece adhesive spots place, and graphite piece is fully contacted with bonded adhesives, the thermocouple junction that is coated with insullac is inserted in the bonded adhesives of graphite piece, and maintain static.Generally, because non-packed thermopair volume is little, lightweight, and bonded adhesives has certain viscosity, so as long as guaranteeing thermocouple junction is inserted in the glue, and get final product with the graphite piece close contact, do not need special fixed form.
Five, with the above-mentioned graphite piece that fixes and thermopair together natural air drying or heating, drying.Wherein the natural air drying time is 24 hours, and the heated baking temperature is 150 ℃～200 ℃, and the time is 3～5 hours, graphite piece can be finished in thermocouple assembly is placed on baking oven.
Take above-mentioned processing step finish bonding after, measure resistance between graphite block and the thermopair greater than 10M Ω, the pulling force that can bear can satisfy insulativity and the reliability requirement of measuring sonde greater than 50N, and this probe successfully has been used for the measurement of superlaser parameter.
Claims (4)
1. the adhering method of a thermopair and graphite piece is characterized in that: may further comprise the steps:
[1] with fine graphite powders, bonding with synthetic resin powder and the allotment solvent be deployed into bonded adhesives; Described synthetic resin powder is 1:5～1:8 with the ratio of the weight portion of dag; Described allotment solvent is formaldehyde or alcohol;
[2] graphite piece and thermopair adhesive spots position are carried out grinding process, make its surperficial roughening, with alcohol with adhesive spots position scrub;
[3] at thermocouple junction position coating high-temperature insulating paint, and natural air drying or hyperthermia drying;
[4] evenly smear described deployed bonded adhesives at graphite piece adhesive spots place, and graphite piece is fully contacted with bonded adhesives;
The thermocouple junction that [5] will be coated with insullac inserts in the bonded adhesives of graphite piece, and maintains static;
[6] with the above-mentioned graphite piece that fixes and thermopair together natural air drying or heating, drying.
2. the adhering method of thermopair according to claim 1 and graphite piece is characterized in that: described bonding be phenolics with synthetic resin.
3. the adhering method of thermopair according to claim 1 and graphite piece, it is characterized in that: the applied thickness of described high-temperature insulating paint is 10～20 μ m.
4. the adhering method of thermopair according to claim 1 and graphite piece, it is characterized in that: the described high-temperature insulating paint natural air drying time is 12 hours; The temperature of described high-temperature insulating paint hyperthermia drying is 150 ℃～250 ℃, and the time is 3～4 hours; The natural air drying time of the described graphite piece that fixes and thermopair is 24 hours; The heating, drying temperature of the described graphite piece that fixes and thermopair is 150 ℃～200 ℃, and the time is 3～5 hours.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110231949.9A CN102288313B (en) | 2011-08-15 | 2011-08-15 | Method for bonding thermocouple with graphite piece |
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| CN201110231949.9A CN102288313B (en) | 2011-08-15 | 2011-08-15 | Method for bonding thermocouple with graphite piece |
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| CN102288313B true CN102288313B (en) | 2013-01-16 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86100933A (en) * | 1986-01-31 | 1987-04-29 | 天津大学 | The resistive conductor temperature sensor that microwave heating is used |
| CN2129925Y (en) * | 1992-06-04 | 1993-04-14 | 天津大学 | Temperature probe for high resistance wire |
| CN101034016B (en) * | 2007-04-04 | 2010-07-21 | 沈阳东大传感技术有限公司 | Special type WRe temperature sensor |
| CN101839273A (en) * | 2009-03-16 | 2010-09-22 | 苏铁力 | Method for bonding and sealing materials with greatly different coefficients of thermal expansion |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1775758A2 (en) * | 2004-07-23 | 2007-04-18 | Intellectual Property Bank Corp. | Silicon wafer substrate locking stage and silicon wafer substrate temperature measuring method |
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2011
- 2011-08-15 CN CN201110231949.9A patent/CN102288313B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86100933A (en) * | 1986-01-31 | 1987-04-29 | 天津大学 | The resistive conductor temperature sensor that microwave heating is used |
| CN2129925Y (en) * | 1992-06-04 | 1993-04-14 | 天津大学 | Temperature probe for high resistance wire |
| CN101034016B (en) * | 2007-04-04 | 2010-07-21 | 沈阳东大传感技术有限公司 | Special type WRe temperature sensor |
| CN101839273A (en) * | 2009-03-16 | 2010-09-22 | 苏铁力 | Method for bonding and sealing materials with greatly different coefficients of thermal expansion |
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| CN102288313A (en) | 2011-12-21 |
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