CN107315026B - Self-ignition point tester and use method thereof - Google Patents
Self-ignition point tester and use method thereof Download PDFInfo
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- CN107315026B CN107315026B CN201710592047.5A CN201710592047A CN107315026B CN 107315026 B CN107315026 B CN 107315026B CN 201710592047 A CN201710592047 A CN 201710592047A CN 107315026 B CN107315026 B CN 107315026B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/02—Investigating or analyzing materials by the use of thermal means by investigating changes of state or changes of phase; by investigating sintering
- G01N25/12—Investigating or analyzing materials by the use of thermal means by investigating changes of state or changes of phase; by investigating sintering of critical point; of other phase change
Abstract
The invention discloses a self-ignition point tester, which comprises a testing mechanism, a control mechanism and a lifting mechanism; the test mechanism comprises a test flask, a heating device, a heat preservation device and an observation device, the control mechanism comprises a control switch and a main control device, the control switch comprises a three-in-one switch, an emergency stop switch and a self-locking switch, the main control device comprises an industrial tablet personal computer, an external USB interface, a motor, an isolation transmitter, a power regulator, a PID temperature control module, a first thermocouple, a second thermocouple, a third thermocouple, a fourth thermocouple, a main board, a relay board and an atmospheric pressure sensor, the lifting mechanism is arranged on an instrument bottom board, and the lifting mechanism comprises a motor, a motor gear, a screw rod gear and a photoelectric pair pipe; the invention provides an accurate test self-ignition point tester.
Description
Technical Field
The invention relates to the field of self-ignition point monitoring, in particular to a self-ignition point tester.
Background
The self-ignition point is one of important dangerous parameters of chemicals, and whether the self-ignition of the article can occur in the production, storage and transportation can be judged through the height of the self-ignition point so as to determine the safety control condition. The existing self-ignition point tester in the domestic market is low in general detection precision, low in efficiency and poor in safety, the existing equipment is difficult to meet verification requirements, and detection equipment meeting standard requirements and adapting to the development of the age is used for detecting and packaging dangerous characteristics of the materials. There is a need to continue new self-ignition testers to meet the market and meet new international standards.
Disclosure of Invention
The invention overcomes the defects of the prior art and provides the self-ignition point tester for accurate testing.
The technical scheme of the invention is as follows:
the self-ignition point tester comprises a testing mechanism, a control mechanism and a lifting mechanism; the test mechanism comprises a test flask, a heating device, a heat preservation device and an observation device, wherein the test flask is placed in the heating device, the heating device is wrapped by the heat preservation device, the observation device is arranged above the tester, and one end of the observation device is arranged on the test flask; the control mechanism comprises a control switch and a main control device, wherein the control switch comprises a three-in-one switch, a scram switch and a self-locking switch, the three-in-one switch is arranged on the side face of an instrument, the scram switch is arranged on the instrument, the self-locking switch is arranged on the front face of the instrument, the main control device comprises an industrial tablet personal computer, an external USB interface, a motor, an isolation transmitter, a power regulator, a PID temperature control module, a first thermocouple, a second thermocouple, a third thermocouple, a fourth thermocouple, a main board, a relay board and an atmospheric pressure sensor, and the external USB interface, the motor, the isolation transmitter, the power regulator, the PID temperature control module, the first thermocouple, the second thermocouple, the third thermocouple, the fourth thermocouple, the relay board and the atmospheric pressure sensor are electrically connected with and controlled by the main board; the lifting mechanism is arranged on the instrument bottom plate and comprises a motor, a motor gear, a screw rod gear and a photoelectric pair tube, the motor gear drives the screw rod gear to rotate through the motor, the instrument bottom plate is provided with a bearing foot, the foot comprises a connecting column and a cylindrical chassis, and the diameter of the connecting column is smaller than that of the cylindrical chassis.
Further, the heat preservation device in the test mechanism comprises a heating cavity and heat preservation cotton, and the outside of the heating cavity is wrapped by the heat preservation cotton.
Further, the heating device of the test mechanism comprises an upper cover heating plate, a lower cover heating plate and a ceramic heating ring, wherein the upper cover heating plate is placed on the upper portion of the test flask, the lower cover heating plate is placed on the bottom of the test flask, and the ceramic heating ring is placed in the middle of the heating cavity.
Further, a fourth thermocouple of the main control device is installed at the top of the instrument and is used for monitoring the temperature in the test flask.
Further, viewing device includes camera and speculum, the camera is installed at self-ignition point tester top, self-ignition point tester's upper portion sets up upper cover and lifts up the piece, the speculum is installed on the upper cover lifts up the piece, the camera passes through the speculum and observes the experimental situation in the experimental flask in real time.
Further, a first thermocouple of the main control device is arranged at the neck of the test flask, a second thermocouple of the main control device is arranged at the middle of the test flask, and the first thermocouple and the second thermocouple are used for monitoring the temperature of the heating cavity. The second thermocouple was in intimate contact with the outer surface of the test flask.
Further, a third thermocouple of the main control device was installed at the center of the bottom of the test flask.
Further, the control mechanism further comprises a power supply control device, the power supply control device comprises a first power supply control module and a second power supply control module, the first power supply control module is used for supplying power to the control system, and the second power supply control module is used for supplying power to the main board.
Further, the alarm device is further provided with an alarm device, and the alarm device adopts a buzzer.
The application method of the self-ignition point tester specifically comprises the following steps:
compared with the prior art, the invention has the advantages that: the temperature of each point in the cavity is guaranteed by adopting three-region discrete tube type temperature control of the test cavity, the temperature of the three regions is quickly adjusted to be uniform by matching with a plurality of groups of equal-precision ultrafine thermocouples, the cavity is completely insulated, and any factors which may influence the accuracy of the test result such as static electricity are removed; by combining various typical combustion characteristic models, a self-grinding firework distinguishing algorithm is constructed, so that the hot flame and the cold flame can be distinguished automatically, the self-ignition temperature (AIT) of the hot flame and the self-ignition temperature (CFT) of the cold flame can be given accurately, and reliable classification basis is provided for testers; the remote video transmission technology is adopted to instantly display the sample combustion process on a handheld terminal (Pad), so that a tester can more accurately judge the test result, and the test video can be referred and traced at any time; the standard working mode is supported, and the test standard and flexibility are considered; the special gas and liquid sample injector is equipped, and high-precision sample injection is realized on the premise of effectively avoiding the contact of personnel with high temperature so as to ensure the test result; the multi-channel high-precision temperature cascade acquisition control system can realize multi-point self-correction of the furnace temperature, and original data is permanently stored in an office form; the novel nano microporous heat insulation material is adopted, and the heat dissipation rate is only 0.019W/M.K, which is 3-4 times that of the traditional heat insulation material; the system is provided with a secondary overheat protection system, and provides remote control power-off protection and self-discrimination temperature out-of-control power-off alarm protection; the test process is full-automatic, manual intervention is not needed, and functions of parameter setting, data storage, report form checking and the like are supported; the remote forced power-off function of the accident instrument is added on the basis of full-process automation of the test; an industrial tablet computer and a Windows7 professional operating system are adopted; and network connection is supported, and remote control and data transmission are realized.
Drawings
FIG. 1 is a schematic view of the mechanism of the right side of the self-ignition point tester of the present invention;
FIG. 2 is a schematic diagram of the mechanism of the self-ignition point tester according to the present invention in a rear view;
FIG. 3 is a schematic view of the mechanism of the left side of the self-ignition tester of the present invention.
Reference numerals: a base plate 1; a footing 2; a USB interface 3; a distribution box board 4; isolating the transmitter 5; a temperature and humidity transmitter 6; a first power supply control module 7; a relay board 8; a second power supply control module 9; a PID temperature control module 10; a power regulator 11; a camera 12; a reflecting mirror 13; a main board 14; a motor 15; an atmospheric pressure sensor 16; a photoelectric pair tube 17; an upper cover lifting member 18; an upper cover heating plate 19; a first thermocouple 20; test flask 21; a second thermocouple 22; a third thermocouple 23; a lower cover heating plate 24; a heat-insulating cotton 25; a lead screw gear 26; a motor gear 27; a three-in-one switch 28; a fourth thermocouple 29; an emergency stop switch 30; a self-locking switch 31; a ceramic heating collar 32; heating the cavity 33.
Detailed Description
The invention is further described below with reference to the drawings and the detailed description.
As shown in fig. 1 to 3, the self-ignition point tester comprises a test mechanism, a control mechanism and a lifting mechanism.
The test mechanism comprises a test flask 21, a heating device, a heat preservation device and an observation device. The test flask 21 is placed in the heating device, the test flask 21 is used for placing test substances, the heating device is wrapped by the heat preservation device, the observation device is arranged above the tester, and one end of the observation device is arranged on the test flask 21. The heating device comprises an upper cover heating plate 19, a lower cover heating plate 24 and a ceramic heating ring 32, wherein the upper cover heating plate 19 is placed on the upper part of the test flask 21, the lower cover heating plate 24 is placed on the bottom of the test flask 21, and the ceramic heating ring 32 is placed in the middle of a heating cavity 33. The upper cover heating plate 19, the lower cover heating plate 24 and the ceramic heating ring 32 are used for heating the heating cavity 33, so that the uniformity of temperature is ensured, the whole test flask 21 can be uniformly heated to be heated together, and test deviation caused by only local heating is avoided. The heat preservation device comprises a heating cavity 33 and heat preservation cotton 25, the outside of the heating cavity 33 is wrapped by the heat preservation cotton 25, and the heat preservation device is made of nano microporous heat insulation materials and is 3-4 times of the effect of the traditional heat insulation materials. The heating cavity 33 is used for providing a constant temperature environment, and the heat preservation cotton 25 plays a role in heat preservation. The observation device comprises a camera 12 and a reflecting mirror 13, wherein the camera 12 is arranged at the top of the self-ignition tester, an upper cover lifting piece 18 is arranged at the upper part of the self-ignition tester, the reflecting mirror 13 is arranged on the upper cover lifting piece 18, and the camera 12 observes the test condition in the test flask 21 in real time through the reflecting mirror 13.
The control mechanism comprises a control switch, a main control device and a power supply control device. The control switch comprises a three-in-one switch 28, a scram switch 30 and a self-locking switch 31, wherein the three-in-one switch 28 is arranged on the side surface of the instrument, the scram switch 30 is arranged on the instrument, and the self-locking switch 31 is arranged on the front surface of the instrument. The three-in-one switch 28 is used for being connected with an external power supply, the emergency stop switch 30 is used for emergently stopping the self-ignition tester, and the self-locking switch 31 is used for controlling the self-ignition tester to be turned on and off. The main control device and the power supply control device are arranged on the distribution box board 4. The main control device comprises an industrial tablet personal computer mainly used for displaying information or inputting information, an external USB interface 3, a motor 15, an isolation transmitter 5, a power regulator 11, a PID temperature control module 10, a first thermocouple 20, a second thermocouple 22, a third thermocouple 23, a fourth thermocouple 29, a main board 14, a relay board 8 and an atmospheric pressure sensor 16. The external USB interface 3, the motor 15, the isolation transmitter 5, the power regulator 11, the PID temperature control module 10, the first thermocouple 20, the second thermocouple 22, the third thermocouple 23, the fourth thermocouple 29, the relay board 8 and the atmospheric pressure sensor 16 are electrically connected with and controlled by the main board 14. The isolation transmitter 5 is used for collecting the temperature of the fourth thermocouple 29, so that the constant temperature control is facilitated. The fourth thermocouple 29 is used to monitor the temperature in the test flask 21. The power regulator 11 achieves precise temperature control by precise control of voltage, current and power. The PID temperature control module 10 is used for adjusting the temperature so as to perform constant temperature control. A fourth thermocouple 29 of the main control device is mounted on top of the instrument for monitoring the temperature in the test flask 21. The first thermocouple 20 is installed at the neck of the test flask 21, the second thermocouple 22 is installed at the middle of the test flask 21, and the first thermocouple 20 and the second thermocouple 22 are used for monitoring the temperature of the heating cavity 33. The second thermocouple 22 is in close contact with the outer surface of the test flask 21. The third thermocouple 23 is installed at the center of the bottom of the test flask 21. The relay board 8 is used for controlling the on-off of a circuit. The atmospheric pressure sensor 16 is used to detect the atmospheric pressure conditions in the test environment. The temperature and humidity transmitter 6 is used for detecting the temperature and humidity conditions in the environment. The power supply control device comprises a first power supply control module 7 and a second power supply control module 9, wherein the first power supply control module 7 is used for supplying power to the control system, and the second power supply control module 9 is a main board 14 power supply and is used for supplying power to the main board 14.
The lifting mechanism is mounted on the instrument base plate 1. The lifting mechanism comprises a motor 15, a motor gear 27, a screw gear 26 and a photoelectric pair tube 17, wherein the motor gear 27 drives the screw gear 26 to rotate through the motor 15. The photoelectric pair tube 17 plays a limiting role. The instrument bottom plate 1 is provided with the footing 2 of bearing, footing 2 is provided with 4, footing 2 includes spliced pole and cylindrical chassis, the diameter of spliced pole is less than cylindrical chassis. At the end of the test, the upper lid lifter 18 is lifted by the lifting mechanism, and the test flask 21 is taken out again when it is cooled to room temperature.
As optimization, the tester further comprises an alarm device, and the alarm device adopts a buzzer.
The specific operation steps of the self-ignition point tester are as follows:
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the concept of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.
Claims (6)
1. The self-ignition point tester is characterized by comprising a testing mechanism, a control mechanism and a lifting mechanism; the test mechanism comprises a test flask, a heating device, a heat preservation device and an observation device, wherein the test flask is placed in the heating device, the heating device is wrapped by the heat preservation device, the observation device is arranged above the tester, and one end of the observation device is arranged on the test flask; the control mechanism comprises a control switch and a main control device, wherein the control switch comprises a three-in-one switch, a scram switch and a self-locking switch, the three-in-one switch is arranged on the side face of an instrument, the scram switch is arranged on the instrument, the self-locking switch is arranged on the front face of the instrument, the main control device comprises an industrial tablet personal computer, an external USB interface, a motor, an isolation transmitter, a power regulator, a PID temperature control module, a first thermocouple, a second thermocouple, a third thermocouple, a fourth thermocouple, a main board, a relay board and an atmospheric pressure sensor, and the external USB interface, the motor, the isolation transmitter, the power regulator, the PID temperature control module, the first thermocouple, the second thermocouple, the third thermocouple, the fourth thermocouple, the relay board and the atmospheric pressure sensor are electrically connected with and controlled by the main board; the lifting mechanism is arranged on the instrument bottom plate and comprises a motor, a motor gear, a screw rod gear and a photoelectric pair tube, the motor gear drives the screw rod gear to rotate through the motor, the instrument bottom plate is provided with a bearing foot, the foot comprises a connecting column and a cylindrical chassis, and the diameter of the connecting column is smaller than that of the cylindrical chassis;
the heat preservation device in the test mechanism comprises a heating cavity and heat preservation cotton, and the outside of the heating cavity is wrapped by the heat preservation cotton; the heating device of the test mechanism comprises an upper cover heating plate, a lower cover heating plate and a ceramic heating ring, wherein the upper cover heating plate is arranged at the upper part of the test flask, the lower cover heating plate is arranged at the bottom of the test flask, and the ceramic heating ring is arranged at the middle part of the heating cavity; the fourth thermocouple of the main control device is arranged at the top of the instrument and used for monitoring the temperature in the test flask;
the using method of the self-ignition point tester specifically comprises the following steps:
(1) starting: confirming that an application program of the current tester is successfully opened and connected with the industrial tablet computer, so that the industrial tablet computer is successfully connected with the tester;
(2) setting a tester: filling in relevant information such as test substances, forms and the like, adjusting angles of a camera and a reflecting mirror, and confirming whether the positions of the four thermocouples are correct;
(3) starting the test: the self-locking switch is used for guaranteeing the tester, the heating device starts to raise the temperature, the alarm device, namely the buzzer, can make two sounds after the set temperature is reached, the injector is used for throwing a liquid or gas sample into the sample bottle, the timing button is rapidly pressed, the program is automatically timed, and the video is automatically recorded through the observation device;
(4) the next round of test: after the set time is reached, the buzzer sounds again to indicate that the current temperature point test is finished, and the instrument automatically heats (or cools) to enter the next temperature point test;
(5) end of test: repeating the operations (3) and (4) until the program prompts "self-ignition point has been found, is 5 tests conducted at that temperature to verify that self-ignition point? "determine" or "cancel" is selected as desired. If the determination program is clicked, the test is carried out for 5 times at the spontaneous combustion temperature, if the cancellation program is clicked, the determination program is clicked to prompt the increase of the sample dosage, the test is continued, and the cancellation test is finished. The upper cover lifting piece is lifted by the lifting mechanism, and the upper cover lifting piece is safely taken out when the temperature of the test flask is reduced to the room temperature.
2. The self-ignition point tester according to claim 1, wherein: the observation device comprises a camera and a reflecting mirror, wherein the camera is arranged at the top of the self-ignition point tester, an upper cover lifting piece is arranged on the upper part of the self-ignition point tester, the reflecting mirror is arranged on the upper cover lifting piece, and the camera observes the test condition in the test flask through the reflecting mirror in real time.
3. The self-ignition point tester according to claim 1, wherein: the first thermocouple of main control device installs the neck at experimental flask, and main control device's second thermocouple is installed at experimental flask's middle part, and first thermocouple and second thermocouple are used for the temperature of control heating cavity. The second thermocouple was in intimate contact with the outer surface of the test flask.
4. The self-ignition point tester according to claim 1, wherein: the third thermocouple of the main control device is installed at the center of the bottom of the test flask.
5. The self-ignition point tester according to claim 1, wherein: the control mechanism further comprises a power supply control device, the power supply control device comprises a first power supply control module and a second power supply control module, the first power supply control module is used for supplying power to the control system, and the second power supply control module is used for supplying power to the main board.
6. The self-ignition point tester according to claim 1, wherein: the alarm device also comprises an alarm device, wherein the alarm device adopts a buzzer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710592047.5A CN107315026B (en) | 2017-07-19 | 2017-07-19 | Self-ignition point tester and use method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710592047.5A CN107315026B (en) | 2017-07-19 | 2017-07-19 | Self-ignition point tester and use method thereof |
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| CN107315026A CN107315026A (en) | 2017-11-03 |
| CN107315026B true CN107315026B (en) | 2023-06-20 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108132354B (en) * | 2017-12-21 | 2023-06-20 | 上海市计量测试技术研究院 | Cyanide reactivity tester |
| CN108562607B (en) * | 2018-02-27 | 2023-06-20 | 上海市计量测试技术研究院 | Self-ignition tube furnace |
| CN110261158B (en) * | 2019-07-09 | 2024-03-01 | 应急管理部沈阳消防研究所 | Temperature test device for fireproof monitoring alarm socket and switch |
| CN110940692A (en) * | 2019-11-29 | 2020-03-31 | 西安近代化学研究所 | Device and method for testing thermal runaway critical parameters of medium-size reaction materials |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012088112A (en) * | 2010-10-18 | 2012-05-10 | Sumitomo Chemical Co Ltd | Spontaneous combustion phenomenon bodily-feeling apparatus |
| CN206292194U (en) * | 2016-11-10 | 2017-06-30 | 上海市计量测试技术研究院 | A kind of solid self-ignition point test instrument |
| CN207263676U (en) * | 2017-07-19 | 2018-04-20 | 上海市计量测试技术研究院 | Self-ignition point tester |
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- 2017-07-19 CN CN201710592047.5A patent/CN107315026B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012088112A (en) * | 2010-10-18 | 2012-05-10 | Sumitomo Chemical Co Ltd | Spontaneous combustion phenomenon bodily-feeling apparatus |
| CN206292194U (en) * | 2016-11-10 | 2017-06-30 | 上海市计量测试技术研究院 | A kind of solid self-ignition point test instrument |
| CN207263676U (en) * | 2017-07-19 | 2018-04-20 | 上海市计量测试技术研究院 | Self-ignition point tester |
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