CN2792737Y - Glued temperature sensing device of high-frequency heating wood - Google Patents
Glued temperature sensing device of high-frequency heating wood Download PDFInfo
- Publication number
- CN2792737Y CN2792737Y CN200520069375.XU CN200520069375U CN2792737Y CN 2792737 Y CN2792737 Y CN 2792737Y CN 200520069375 U CN200520069375 U CN 200520069375U CN 2792737 Y CN2792737 Y CN 2792737Y
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- temperature
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- frequency heating
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Abstract
The utility model relates to a gluing temperature detecting device for high-frequency heating wood, which is used for the gluing of high-frequency medium heating wood. On a circuit board, two contact points arranged on one end of a high-voltage switch 2 are connected with a temperature detecting point T1 (or T2, or T3, etc.), two contact points arranged on the other end of the high-voltage switch 2 are respectively connected with a change-over switch 3 through a copper-constantan wire L, and the change-over switch 3 is connected inside a constant temperature box 5 through the copper-constantan wire L and a display instrument 4. The utility model has the advantages that the utility model is suitable for one-point or multi-point testing of high-frequency heating gluing temperature; the utility model detects the temperature at definite time, the operation is simple and convenient, and the detecting temperature data is accurate; besides, the utility model can not damage instruments.
Description
Technical field
The utility model relates to a kind of high-frequency heating wood gluing temperature measuring equipment that is used for high-frequency dielectric heating wood gluing.Belong to high-frequency dielectric heating wood gluing Instrument technology field.
Background technology
In the hot-press gluing process, temperature is one of three main technologic parameters, and it has not only determined the quality of laminated product with unit pressure, hot pressing time, and has determined the output of laminated product.Therefore, in order to satisfy the optimum process condition of hot-press gluing, must be that the glue-line temperature is tested, thereby select reasonable heating time and unit pressure, guarantee the quality and the output of laminated product the temperature of each point in the load.When Steam Heating was glued together, the short-cut method that usually adopts in the prior art was a thermocouple measurement glue-line temperature, measured temperature in the slab because if glass-stem thermometer inserted, in pressurization and pressure maintaining period, thermometer is broken easily, and its dynamic responding speed is slow.Add hot gluing for high-frequency dielectric, do not exist owing to generally do not allow hardware in the high-frequency electric field, otherwise can influence the branch city of electric field and the uniformity of heating; Simultaneously, because high-frequency electric field has induction effect to measuring instrument, like this, in the high-frequency heating gluing technique, concrete requirement to be arranged to thermocouple temperature measurement circuit and method of testing.
Summary of the invention
The purpose of this utility model is the characteristic at the defective of above-mentioned existence and high-frequency dielectric heating, a kind of high-frequency heating wood gluing temperature measuring equipment is proposed, so that be suitable for utilizing the repeatedly polarization of high-frequency electric field to material inside polar molecule, make polar molecule under this high frequency action of alternative electric field sharply motion and mutually mutual friction produce hot and glue-line temperature measuring when carrying out wood gluing.Technical solution of the present utility model: its structure is on terminal plate 1, and two contacts on the end of high-voltage switch gear 2 meet point for measuring temperature T
1Or T
2Or T
3Deng, two contacts on the other end of high-voltage switch gear 2 are passed through copper respectively---constantan wire L and change-over switch 3 are joined, and change-over switch 3 is passed through copper again---, and constantan wire L and Displaying Meter 4 insert (temperature T in the insulating box 5
0=0 ℃).
Advantage of the present utility model: be suitable for one or more tests of high-frequency heating gummed temperature, the timing thermometric, simple to operation, the measured temperature data are accurate, and can not damage instrument.
Description of drawings
Accompanying drawing is a structural representation of the present utility model
L among the figure is a copper---constantan wire, the 1st, terminal plate, the 2nd, high-voltage switch gear, the 3rd, change-over switch, the 4th, Displaying Meter, the 5th, insulating box, the temperature inside the box T
0=0 ℃, T
1, T
2, T
3It is point for measuring temperature.
The specific embodiment
The contrast accompanying drawing, its structure is on terminal plate 1, two contacts on the end of high-voltage switch gear 2 meet point for measuring temperature T
1Or T
2Or T
3, two contacts on the other end of high-voltage switch gear 2 are passed through copper respectively---constantan wire L and change-over switch 3 are joined, and change-over switch 3 is passed through copper again---, and constantan wire L and Displaying Meter 4 insert in the insulating box 5 the temperature inside the box T
0=0 ℃.
The high-frequency dielectric heating is to utilize the repeatedly polarization of high-frequency electric field to material inside polar molecule, and polar molecule is sharply moved and phase mutual friction generation heat under this high frequency action of alternative electric field, thereby reaches the purpose of heating.In timber processing, it is widely used in the gummed of timber, quickens the curing of adhesive.High-frequency dielectric heating mainly to as if dielectric, therefore, in high-frequency electric field, do not allow hardware and exist, otherwise can influence the distribution and the heating uniformity of electric field; Simultaneously high-frequency electric field has induction effect to the thermocouple measurement instrument, if method of testing is incorrect, not only the data of surveying inaccurate, and can burn out instrument.Therefore, in the high-frequency heating gluing technique, adopt thermocouple temperature measurement, adopt the method for thermocouple temperature measurement different when glue together with Steam Heating, it can not continuous measurement, can only be interrupted or temperature is measured in timing.It is when slab is installed thermocouple to be put into the slab glue-line that the high-frequency heating gummed adopts the method for thermocouple temperature measurement, when high voltage heats, take ground connection, shielding, disconnect measures such as thermometric circuit, in case carry out thermometric with regard to demand working thermometric circuit after closing high voltage.Because the rapid dynamic response speed of metallic thermocouple, and can change the distribution of electric field, influence its electrothermal calefactive rate of glue-line on every side, so carry out thermometric in case connect the thermometric circuit, the transient temperature that this moment, Displaying Meter reacted not is the true temperature of glue-line, and is generally high slightly than true temperature.Therefore, must indicate the value when relatively stable to be as the criterion with Displaying Meter, otherwise also have bigger measure error.Simultaneously, the material of each thermocouple, specifications and models are answered consistent, and measurement category all should be in the Displaying Meter range.
Find that by actual measurement because the high-frequency heating time is short, bondline thickness is little, adopts the measured result of above-mentioned temp measuring method accurate, and simple to operation.It can be applied to one or more and carry out the timing thermometric.The represented data of Displaying Meter among the figure (potential difference meter or recorder) are millivolt (mV) thermoelectrical potential, can obtain the temperature of correspondence according to the thermoelectricity capability curve of thermocouple.During actual the use, often adopt copper---copper-constantan thermocouple thermometric circuit.Before the thermometric, earlier the thermometric circuit is carried out bracketing, makes copper---the pass of copper-constantan thermocouple temperature and thermoelectrical potential is a straight line.By the test result of high-frequency heating gummed temperature as can be seen, high frequency heat glues together the temperature of slab center glue-line, is not that prolongation with the high-frequency heating time is in line and rises.It is with the Changing Pattern approximation polynomial regression curve of high-frequency heating time, and its equation general type is:
T＝A
0+A
1t+A
2t
2+A
3t
3+A
4t
4+A
5t
5。
Generally before 85 ℃, slab does not have obvious moisture and escapes, and temperature rises rapidly; After 90～95 ℃, because of adhesive is heated, the large quantity of moisture evaporation is arranged, adhesive solidifies fast, and temperature is risen slowly, finishes to the desired temperature of technology until heating.
Claims (1)
1, high-frequency heating wood gluing temperature measuring equipment is characterized in that on terminal plate (1) two contacts on the end of high-voltage switch gear (2) meet point for measuring temperature T
1Or T
2Or T
3, two contacts on the other end of high-voltage switch gear (2) are passed through copper respectively---and constantan wire (L) joins with change-over switch (3), and change-over switch (3) is passed through copper again---and constantan wire (L) and Displaying Meter (4) insert in the insulating box (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200520069375.XU CN2792737Y (en) | 2005-03-01 | 2005-03-01 | Glued temperature sensing device of high-frequency heating wood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200520069375.XU CN2792737Y (en) | 2005-03-01 | 2005-03-01 | Glued temperature sensing device of high-frequency heating wood |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2792737Y true CN2792737Y (en) | 2006-07-05 |
Family
ID=36819888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200520069375.XU Expired - Fee Related CN2792737Y (en) | 2005-03-01 | 2005-03-01 | Glued temperature sensing device of high-frequency heating wood |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2792737Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110545970A (en) * | 2017-03-14 | 2019-12-06 | 威廉·约翰·巴克斯特·赫弗南 | Wood heating system and method |
| CN111360950A (en) * | 2020-03-09 | 2020-07-03 | 杨奠基 | Method and device for measuring and recording temperature and pressure in plywood in production process |
-
2005
- 2005-03-01 CN CN200520069375.XU patent/CN2792737Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110545970A (en) * | 2017-03-14 | 2019-12-06 | 威廉·约翰·巴克斯特·赫弗南 | Wood heating system and method |
| US11181318B2 (en) | 2017-03-14 | 2021-11-23 | The University Of Canterbury Of Ilam Road | Wood heating system and method |
| CN111360950A (en) * | 2020-03-09 | 2020-07-03 | 杨奠基 | Method and device for measuring and recording temperature and pressure in plywood in production process |
| CN111360950B (en) * | 2020-03-09 | 2021-10-01 | 杨奠基 | Method and device for measuring and recording temperature and pressure in plywood in production process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |