CN203310714U - Novel stepper motor controlled differential thermal balance measuring device - Google Patents
Novel stepper motor controlled differential thermal balance measuring device Download PDFInfo
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- CN203310714U CN203310714U CN2012205677382U CN201220567738U CN203310714U CN 203310714 U CN203310714 U CN 203310714U CN 2012205677382 U CN2012205677382 U CN 2012205677382U CN 201220567738 U CN201220567738 U CN 201220567738U CN 203310714 U CN203310714 U CN 203310714U
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Abstract
The utility model discloses a novel stepper motor controlled differential thermal balance measuring device. The device comprises a quality measuring unit, a differential thermal measuring unit, a heating unit, an anti-airflow disturbance unit, a constant temperature unit, a furnace body cooling system, a temperature measuring unit, an instrument atmosphere control unit and an instrument control circuit unit. The device can realize the measurement of various samples under different conditions and meet the measurement requirements from trace samples to large-dose samples.
Description
Technical field
The utility model relates to a kind of differential thermal balance measurement mechanism, and particularly a kind of novel stepper motor is controlled formula differential thermal balance measurement mechanism.
Background technology
Differential thermal balance is a kind of important thermal-analysis instrumentation, and there is following deficiency in domestic existing differential thermal balance at present: the thermogravimetric Measurement Resolution is low, and the thermogravimetric drift that in temperature-rise period, flow perturbation produces is large, and in temperature-rise period, the performance of γ-ray emission weightening finish error is large; Differential thermal resolution is low, sensitivity is low; Sample temperature sensing speed is excessively slow, and measuring accuracy is poor, the constant temperature weak effect; Heating rate is excessively slow; Line-hit is excessive; Amount of samples is few etc.
Summary of the invention
The purpose of this utility model is to provide a kind of novel stepper motor and controls formula differential thermal balance measurement mechanism, low to solve the thermogravimetric Measurement Resolution that traditional differential thermal balance exists, the thermogravimetric drift that in temperature-rise period, flow perturbation produces is large, and in temperature-rise period, the performance of γ-ray emission weightening finish error is large; Differential thermal resolution is low, sensitivity is low; Sample temperature sensing speed is excessively slow, and measuring accuracy is poor, the constant temperature weak effect; Heating rate is excessively slow; Line-hit is excessive; The problems such as amount of samples is few.
The technical scheme that the utility model addresses the above problem is:
A kind of novel stepper motor is controlled formula differential thermal balance measurement mechanism and is comprised quality measurement unit, differential thermal measuring unit, heating unit, anti-flow perturbation unit, constant temperature unit, body of heater cooling system, temperature measurement unit, instrument atmosphere control module, instrument control circuit unit.Described quality measurement unit is mainly by the measurement of zero-bit formula mechanical balance difficulty action accomplishment, comprise the balance transverse beam system, wireless signal operation and transmission unit, support rod system, balance base, balance pedestal and balance protective cover, the described balance transverse beam system mainly change of the optical characteristics of the photoelectric detector by crossbeam one end is regulated the crossbeam level, when balance small skew occurs because sample quality changes, photoelectric sensor just produces the signal of a corresponding polarity, deliver to check weighing amplifier control circuit unit and connect outer computer, with computing machine, communicate detection, adopting the jewel triangular blade is fulcrum, replace traditional suspender belt, also be pull spring, support the metal beam of balance, increase the bearing capacity of balance, at the crossbeam other end, be connected and fixed a balance suspension hook and balance suspension ring by the suspender belt side arm, the two jointly be used to the balanced weight that hangs balance to guarantee the vertical floating balance of support bar, wireless signal operation and transmission unit mainly comprise stepper motor, linear guides and mercury cell etc., by at jewel edge of a knife upper end rigid connection one stepper motor, and the metal conductive bar of crossbeam both sides is inserted in mercury cell, when external circuit is connected, the collaborative leading screw rotation of motor rotation, the slide block that drive hangs with counterweight slides on linear guides, adjust the counterweight position, accurate weighing sample quality, the control signal of whole motor is by being wirelessly transmitted to the instrument control circuit unit, reduced the resistance of circuit to crossbeam, improve the measuring accuracy of balance, support bar is by the effect with playing the firm sample crucible of support being connected of differential thermal sensor, sample tray is real is a tabular utmost point of differential thermal sensor thermopair, support bar is a hollow ceramic bar, the internal cavity that passes support bar with the tabular opposite polarity linear utmost point of thermopair is connected with a tabular utmost point, the differential thermal that completes sample and reference substance is measured, the differential thermal measuring unit adopts the dull and stereotyped thermopair of dumbbell shape as sensor, realizes measuring process through amplifying circuit, heating unit is comprised of heating furnace and temperature control system, using carborunbum tube as heating source, type of heating in adopting, outer cover muff and stainless steel stove cylinder, guarantee that in whole course of reaction, temperature reaches the temperature of appointment, and can guarantee that body of heater is heated to higher temperature section, anti-flow perturbation unit adopts expansion type noise reduction principle and multilayer baffle arrangement in furnace chamber, make gas form the process that repeatedly expands, shrinks, slowed down the quick convection current of gas, the impact of the balance support bar vibration caused when avoiding heating up flow perturbation and passing into gas on mass measurement, constant temperature system adopts the other temperature control galvanic couple of placing separately of stove silk, carries out control and the linear compensation of temperature, the body of heater cooling system consists of the circulating cooling water jacket, plays cooling-down effect thereby take heat out of body of heater by water circulation, temperature measurement unit adopts thermopair to carry out the collection of sample temperature, and two unit all are placed on the balance support bar in the reactor protection tube, the atmosphere control module is to control mass flowmeter, completes the control and measurement of gas flow, guarantees the stable of atmosphere flow required in experimentation, the instrument control circuit unit connects outer computer, with computing machine, communicates the inter-working between each data acquisition unit of control instrument, transverse beam system, wireless signal operation and transmission unit and support rod system are connected and fixed by mechanical framework, form the agent structure of balance, mechanical framework is connected in again on the balance pedestal, thereby fixing whole balance, and on the balance base plate, add a pair of balance locking rack, before mobile balance, that the balance crossbeam is locked, facilitate movement and the transportation of balance, the connection of heating between pipe fitting, body of heater cooling system and balance, locate all to adopt O type rubber sealing, guarantee that the sealing of total is good, the measurement of the practicable various samples of this device under different condition, and meet the measurement from micro-example to heavy dose of sample.
Heating furnace as above adopts the carborunbum tube heating.
The linear compensation that temperature thermocouple is done temperature is added in heating as above sole.
Multilayer baffle arrangement as above adopts the refractory ceramics catch.
Balance pivot as above is the jewel triangular blade.
Balance weights as above hangs under slide block, and drives the rotational automatic adjusting counterweight of leading screw position by stepper motor, accurately detects example weight and changes.
The control signal of stepper motor as above, by being wirelessly transmitted to the instrument control circuit unit, can reduce the resistance of circuit to crossbeam.
Balance photodetector system as above comprises silicon photocell, light emitting diode and Guang Lan.
The utility model is compared and is had following advantage with traditional thermobalance:
1. adopt the multilayer baffle plate, avoid in temperature-rise period the performance weightening finish error of γ-ray emission in excessive thermogravimetric drift that flow perturbation produces and temperature-rise period;
2. in mass measurement, adopting the jewel triangular blade is fulcrum, replaces traditional suspender belt, also is pull spring, supports the metal beam of balance, increases the balance range.
3. the differential thermal survey sensor adopts flat thermopair, carries out high-precision differential temperature survey.
4. adopting silicon charcoal pipe is the body of heater heating source, and the intensification upper limit of body of heater is increased substantially.
5. the control signal of stepper motor, by being wirelessly transmitted to the instrument control circuit unit, can reduce the resistance of circuit to crossbeam.
6. quantity of sample handling can be at 0-5000mg.
The accompanying drawing explanation
Fig. 1 is one-piece construction schematic diagram of the present utility model.
Fig. 2 is the structural representation of balance transverse beam system.
Fig. 3 is the structural representation of balance support rod system.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, embodiment, structure, feature and working specification thereof to foundation the utility model provides, be described in detail as follows.
Structure of the present utility model as shown in Figure 1, comprises quality measurement unit, differential thermal measuring unit, heating unit, anti-flow perturbation unit, constant temperature unit, body of heater cooling system, temperature measurement unit, instrument atmosphere control module 36, instrument control circuit unit 35.Described quality measurement unit is mainly by the measurement of zero-bit formula mechanical balance difficulty action accomplishment, comprise balance transverse beam system (as shown in Figure 2), wireless signal operation and transmission unit, support rod system (as shown in Figure 3), balance base 22, balance pedestal 14 and balance protective cover 20, the described balance transverse beam system mainly change of the optical characteristics of the photoelectric detector 21 by crossbeam 44 1 ends is regulated the crossbeam level, when balance small skew occurs because sample mass changes, photoelectric sensor just produces the signal of a corresponding polarity, deliver to check weighing amplifier control circuit unit and connect outer computer, with computing machine, communicate detection, adopting jewel triangular blade 26 is fulcrum, replace traditional suspender belt (pull spring) to support the metal beam 44 of balance, increase the bearing capacity of balance, at the crossbeam other end, be connected and fixed a balance suspension hook 30 and balance suspension ring 46 by suspender belt side arm 45, the two jointly be used to the balanced weight 39 that hangs balance to guarantee the vertical floating balance of support bar 8, wireless signal operation and transmission unit mainly comprise stepper motor 15, linear guides 16 and mercury cell 25 etc., by at the jewel edge of a knife 26 upper end rigid connection one stepper motors 15, and by the metal conductive bar of crossbeam both sides 27, when external circuit is connected, collaborative leading screw 18 rotations of motor rotation, the slide block 17 that drive hangs with counterweight 24 slides on linear guides, adjust the counterweight position, accurate weighing sample quality, the control signal of whole motor is by being wirelessly transmitted to the instrument control circuit unit, reduced the resistance of circuit to crossbeam, improve the measuring accuracy of balance, support bar is by the effect with playing the firm sample crucible 6 of support being connected of differential thermal sensor 7, sample tray is real is a tabular utmost point of differential thermal sensor thermopair, support bar is a hollow ceramic bar, the internal cavity that passes support bar with the tabular opposite polarity linear utmost point of thermopair is connected with a tabular utmost point, the differential thermal that completes sample and reference substance is measured, the differential thermal measuring unit adopts the dull and stereotyped thermopair 7 of dumbbell shape as sensor, realizes measuring process through amplifying circuit, heating unit is comprised of heating furnace and temperature control system, using carborunbum tube 3 as heating source, type of heating in adopting, outer cover muff 1 and stainless steel stove cylinder 2, guarantee that in whole course of reaction, temperature reaches the temperature of appointment, and can guarantee that body of heater is heated to higher temperature section, anti-flow perturbation unit adopts expansion type noise reduction principle and multilayer baffle arrangement 12 in furnace chamber, make gas form the process that repeatedly expands, shrinks, slowed down the quick convection current of gas, the impact of the balance support bar vibration caused when avoiding heating up flow perturbation and passing into gas on mass measurement, constant temperature system adopts the other temperature thermocouple 4 of placing separately of stove silk, carries out control and the linear compensation of temperature, the body of heater cooling system consists of circulating cooling water jacket 11, plays cooling-down effect thereby take heat out of body of heater by water circulation, temperature measurement unit adopts thermopair to carry out the collection of sample temperature, and two unit all are placed on the balance support bar 8 in reactor protection tube 1, the atmosphere control module is to control mass flowmeter, completes the control and measurement of gas flow, guarantees the stable of atmosphere flow required in experimentation, the instrument control circuit unit connects outer computer, with computing machine, communicates the inter-working between each data acquisition unit of control instrument, transverse beam system, wireless signal operation and transmission unit and support rod system are connected and fixed by mechanical framework 29, form the agent structure of balance, mechanical framework is connected in again on balance pedestal 14, thereby fixing whole balance, and on the balance base plate, add a pair of balance locking rack 23, before mobile balance, that the balance crossbeam is locked, facilitate movement and the transportation of balance, 13 sealings of O type cushion rubber are all adopted in junction between heating pipe fitting, body of heater cooling system and balance, guarantee that the sealing of total is good, the measurement of the practicable various samples of this device under different condition, and meet the measurement from micro-example to heavy dose of sample.
The utility model is the differential thermal balance measurement mechanism that can realize heavy dose of sample measurement.Heating tube can be heated to 1450 ℃ from room temperature, and 0.1 ℃/min of heating rate～80 ℃/min can realize being rapidly heated and long constant temperature measurement, and sample size can reach 0-5000mg.
In the example shown in Fig. 1, furnace tubing 1 is opened, will measure the thing crucible and be placed on the differential thermal pallet, connect good body of heater; Connect chilled water, open balance protection gas entrance 37 and inject the protection gas, open temperature control system and be warming up to temperature requiredly, after starting reaction, measuring system directly outputs to the computer display window by control system and data acquisition system (DAS) by the variation of example weight.
Claims (5)
1. a novel stepper motor control formula differential thermal balance measurement mechanism comprises quality measurement unit, the differential thermal measuring unit, heating unit, anti-flow perturbation unit, constant temperature unit, the body of heater cooling system, temperature measurement unit, instrument atmosphere control module, the instrument control circuit unit, it is characterized in that, described quality measurement unit is mainly by the measurement of zero-bit formula mechanical balance difficulty action accomplishment, comprise the balance transverse beam system, wireless signal operation and transmission unit, support rod system, balance base, balance pedestal and balance protective cover, the described balance transverse beam system mainly change of the optical characteristics of the photoelectric detector by crossbeam one end is regulated the crossbeam level, when balance small skew occurs because sample quality changes, photoelectric sensor just produces the signal of a corresponding polarity, deliver to check weighing amplifier control circuit unit and connect outer computer, with computing machine, communicate detection, adopting the jewel triangular blade is fulcrum, replace traditional suspender belt, also be pull spring, support the metal beam of balance, increase the bearing capacity of balance, at the crossbeam other end, be connected and fixed a balance suspension hook and balance suspension ring by the suspender belt side arm, the two jointly be used to the balanced weight that hangs balance to guarantee the vertical floating balance of support bar, wireless signal operation and transmission unit mainly comprise stepper motor, linear guides and mercury cell etc., by at jewel edge of a knife upper end rigid connection one stepper motor, and the metal conductive bar of crossbeam both sides is inserted in mercury cell, when external circuit is connected, the collaborative leading screw rotation of motor rotation, the slide block that drive hangs with counterweight slides on linear guides, adjust the counterweight position, accurate weighing sample quality, the control signal of whole motor is by being wirelessly transmitted to the instrument control circuit unit, reduced the resistance of circuit to crossbeam, improve the measuring accuracy of balance, support bar is by the effect with playing the firm sample crucible of support being connected of differential thermal sensor, sample tray is real is a tabular utmost point of differential thermal sensor thermopair, support bar is a hollow ceramic bar, the internal cavity that passes support bar with the tabular opposite polarity linear utmost point of thermopair is connected with a tabular utmost point, the differential thermal that completes sample and reference substance is measured, the differential thermal measuring unit adopts the dull and stereotyped thermopair of dumbbell shape as sensor, realizes measuring process through amplifying circuit, heating unit is comprised of heating furnace and temperature control system, using carborunbum tube as heating source, type of heating in adopting, outer cover muff and stainless steel stove cylinder, guarantee that in whole course of reaction, temperature reaches the temperature of appointment, and can guarantee that body of heater is heated to higher temperature section, anti-flow perturbation unit adopts expansion type noise reduction principle and multilayer baffle arrangement in furnace chamber, make gas form the process that repeatedly expands, shrinks, slowed down the quick convection current of gas, the impact of the balance support bar vibration caused when avoiding heating up flow perturbation and passing into gas on mass measurement, constant temperature system adopts the other temperature control galvanic couple of placing separately of stove silk, carries out control and the linear compensation of temperature, the body of heater cooling system consists of the circulating cooling water jacket, plays cooling-down effect thereby take heat out of body of heater by water circulation, temperature measurement unit adopts thermopair to carry out the collection of sample temperature, and two unit all are placed on the balance support bar in the reactor protection tube, the atmosphere control module is to control mass flowmeter, completes the control and measurement of gas flow, guarantees the stable of atmosphere flow required in experimentation, the instrument control circuit unit connects outer computer, with computing machine, communicates the inter-working between each data acquisition unit of control instrument, transverse beam system, wireless signal operation and transmission unit and support rod system are connected and fixed by mechanical framework, form the agent structure of balance, mechanical framework is connected in again on the balance pedestal, thereby fixing whole balance, and on the balance base plate, add a pair of balance locking rack, before mobile balance, that the balance crossbeam is locked, facilitate movement and the transportation of balance, O type rubber sealing is all adopted in junction between heating pipe fitting, body of heater cooling system and balance, guarantees that the sealing of total is good, the measurement of the practicable various samples of this device under different condition, and meet the measurement from micro-example to heavy dose of sample.
2. a kind of novel stepper motor as claimed in claim 1 is controlled formula differential thermal balance measurement mechanism, it is characterized in that: described balance weights hangs under slide block, and drive the rotational automatic adjusting counterweight of leading screw position by stepper motor, accurately detect example weight and change; The control signal of stepper motor, by being wirelessly transmitted to the instrument control circuit unit, can reduce the resistance of circuit to crossbeam.
3. a kind of novel stepper motor as claimed in claim 1 is controlled formula differential thermal balance measurement mechanism, and it is characterized in that: described multilayer baffle plate is the refractory ceramics structure.
4. a kind of novel stepper motor as claimed in claim 1 is controlled formula differential thermal balance measurement mechanism, and it is characterized in that: described heating pipe fitting is the carborunbum tube structure.
5. a kind of novel stepper motor as claimed in claim 1 is controlled formula differential thermal balance measurement mechanism, it is characterized in that: described heating sole has been added thermopair and has been done the temperature linearity compensation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205677382U CN203310714U (en) | 2012-11-01 | 2012-11-01 | Novel stepper motor controlled differential thermal balance measuring device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012205677382U CN203310714U (en) | 2012-11-01 | 2012-11-01 | Novel stepper motor controlled differential thermal balance measuring device |
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| CN203310714U true CN203310714U (en) | 2013-11-27 |
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| CN2012205677382U Expired - Fee Related CN203310714U (en) | 2012-11-01 | 2012-11-01 | Novel stepper motor controlled differential thermal balance measuring device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111351733A (en) * | 2020-03-12 | 2020-06-30 | 中国科学院上海微系统与信息技术研究所 | High-precision thermo-gravimetric analyzer |
| CN114235246A (en) * | 2021-11-15 | 2022-03-25 | 上海空间推进研究所 | Gravitational method micro-thrust measuring device and pipeline stress interference elimination method thereof |
-
2012
- 2012-11-01 CN CN2012205677382U patent/CN203310714U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111351733A (en) * | 2020-03-12 | 2020-06-30 | 中国科学院上海微系统与信息技术研究所 | High-precision thermo-gravimetric analyzer |
| CN114235246A (en) * | 2021-11-15 | 2022-03-25 | 上海空间推进研究所 | Gravitational method micro-thrust measuring device and pipeline stress interference elimination method thereof |
| CN114235246B (en) * | 2021-11-15 | 2023-11-17 | 上海空间推进研究所 | Gravity method micro-thrust measuring device and pipeline stress interference eliminating method thereof |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Beijing cyber Scientific Instrument Co., Ltd. Assignor: Sun Lixin Contract record no.: 2014990000633 Denomination of utility model: Novel stepper motor controlled differential thermal balance measuring device Granted publication date: 20131127 License type: Exclusive License Record date: 20140807 |
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| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| DD01 | Delivery of document by public notice |
Addressee: Sun Lixin Document name: Notification of Termination of Patent Right |
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| DD01 | Delivery of document by public notice | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131127 Termination date: 20171101 |
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| CF01 | Termination of patent right due to non-payment of annual fee |