CN211739607U - Cooling device of thermogravimetric analyzer - Google Patents
Cooling device of thermogravimetric analyzer Download PDFInfo
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- CN211739607U CN211739607U CN202020098950.3U CN202020098950U CN211739607U CN 211739607 U CN211739607 U CN 211739607U CN 202020098950 U CN202020098950 U CN 202020098950U CN 211739607 U CN211739607 U CN 211739607U
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- liquid nitrogen
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Abstract
The utility model relates to a thermogravimetric analyzer, in particular to a cooling device of the thermogravimetric analyzer, which comprises an exhaust pipe, a liquid nitrogen tank and a pressure regulating valve, wherein the pressure regulating valve is fixed on the liquid nitrogen tank; the device also comprises a cooling air pipe, wherein one end of the cooling air pipe is positioned in the furnace body of the thermogravimetric analyzer, and the other end of the cooling air pipe is connected with the pressure regulating valve; and the liquid nitrogen valve is arranged on the cooling air pipe. The utility model provides a pair of cooling device of thermogravimetric analyzer is through cooling off the thermogravimetric analyzer fast, has shortened the cooling time greatly, has improved efficiency of software testing, and it is high-efficient, convenient to use.
Description
Technical Field
The utility model relates to a thermogravimetric analyzer, especially a cooling device of thermogravimetric analyzer.
Background
Thermogravimetric analyzer principle: the composition or the component of a substance is analyzed through temperature change, a balance is mainly arranged in the thermogravimetric analyzer, the upper limit of the test temperature of a conventional thermogravimetric analyzer can reach 1000 ℃, the temperature is higher, generally, after the test is finished, the temperature of a furnace body reaches about 800 ℃, the conventional thermogravimetric analyzer is not provided with a cooling device, the temperature is reduced by natural cooling after the test is finished, a long time is needed for cooling to the room temperature, generally, 30-40min is needed, the test efficiency of a sample is influenced, and the use is inconvenient.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problem, the utility model provides a can cool off thermogravimetric analyzer fast reduces the cooling time, improves efficiency of software testing, convenient to use's a cooling device of thermogravimetric analyzer, and concrete technical scheme is:
a cooling device of a thermogravimetric analyzer comprises an exhaust pipe, a liquid nitrogen tank and a pressure regulating valve, wherein the pressure regulating valve is fixed on the liquid nitrogen tank; the device also comprises a cooling air pipe, wherein one end of the cooling air pipe is positioned in the furnace body of the thermogravimetric analyzer, and the other end of the cooling air pipe is connected with the pressure regulating valve; and the liquid nitrogen valve is arranged on the cooling air pipe.
Through adopting above-mentioned technical scheme, the liquid nitrogen temperature is low, and in the liquid nitrogen entered into the furnace body through cooling gas pipe, then discharged from the blast pipe, the heat of furnace body was taken away in a large number to the liquid nitrogen when the furnace body, made the furnace body cool down the cooling rapidly, the time of the greatly reduced cooling has improved the efficiency of test. The liquid nitrogen valve was closed when the temperature dropped to room temperature.
Further, the liquid nitrogen valve is an electric valve.
By adopting the technical scheme, the electric valve is connected with the controller of the thermogravimetric analyzer, so that automatic control is realized.
And the flow valve is arranged on the cooling air pipe and is positioned between the furnace body and the liquid nitrogen valve.
By adopting the technical scheme, the flow valve controls the entering amount of the liquid nitrogen, so that the cooling speed and the temperature of the furnace body are controlled.
Furthermore, the one end of cooling gas pipe is connected with the scavenging pipe installed on the furnace body through three way connection, the scavenging pipe is connected with the nitrogen gas tank, the scavenging pipe is equipped with the switching valve, the switching valve is located between cooling gas pipe and the nitrogen gas tank.
Through adopting above-mentioned technical scheme, the cooling pipe is connected with original scavenging pipe, need not to set up the trachea again on the furnace body, and is simple and convenient, through switching valve control scavenging and cooling, when needs cooling, closes the switching valve, lets in the liquid nitrogen cooling, closes the liquid nitrogen valve after the cooling end, opens the switching valve, continues to test.
Compared with the prior art the utility model discloses following beneficial effect has:
the utility model provides a pair of cooling device of thermogravimetric analyzer is through cooling off the thermogravimetric analyzer fast, has shortened the cooling time greatly, has improved efficiency of software testing, and it is high-efficient, convenient to use.
Drawings
FIG. 1 is a schematic diagram of a cooling apparatus of a thermogravimetric analyzer according to a first embodiment;
FIG. 2 is a schematic structural diagram of a second embodiment of a cooling apparatus of a thermogravimetric analyzer.
Detailed Description
The present invention will now be further described with reference to the accompanying drawings.
Example one
As shown in fig. 1, a cooling device of a thermogravimetric analyzer comprises an exhaust pipe 2, a liquid nitrogen tank 3 and a pressure regulating valve, wherein the pressure regulating valve is fixed on the liquid nitrogen tank 3; the device also comprises a cooling air pipe 5, wherein one end of the cooling air pipe 5 is positioned in a furnace body 11 of the thermogravimetric analyzer, and the other end of the cooling air pipe 5 is connected with a pressure regulating valve; and the liquid nitrogen valve 4 are arranged on the cooling air pipe 5.
The thermogravimetric analyzer comprises a box body 1, a balance and a furnace body 11, wherein the furnace body 11 is positioned on the balance, the balance and the furnace body are both positioned in the box body 1, and an exhaust pipe 2 is connected with the furnace body 11.
The liquid nitrogen temperature is low, and the liquid nitrogen passes through cooling pipe 5 and enters into furnace body 11 in, then discharges from blast pipe 2, and the heat of furnace body 11 is taken away in a large number to the liquid nitrogen when the furnace body 11, makes furnace body 11 cool down the cooling rapidly, and the time of the greatly reduced cooling has improved the efficiency of test. When the temperature drops to room temperature, the liquid nitrogen valve 4 is closed.
The liquid nitrogen valve 4 is an electric valve. The electric valve is connected with a controller of the thermogravimetric analyzer to realize automatic control.
The furnace body is characterized by further comprising a flow valve 9, wherein the flow valve 9 is installed on the cooling air pipe 5 and is located between the furnace body 11 and the liquid nitrogen valve 4.
The flow valve 9 controls the entering amount of liquid nitrogen, thereby controlling the cooling speed and the temperature of the furnace body 11. The flow valve 9 can be a digital display type flow control valve and is connected with a controller of the thermogravimetric analyzer to control the flow of the liquid nitrogen, so that the cooling speed is controlled.
When the analysis is finished, the temperature of the furnace body 11 is usually 800 ℃, the liquid nitrogen valve 4 is opened, the liquid nitrogen enters the furnace body 11 through the cooling pipe, the furnace body 11 is rapidly cooled, the flow valve 9 controls the entering amount of the liquid nitrogen, the cooling speed is controlled, the furnace body 11 is cooled to the room temperature, and then the liquid nitrogen valve 4 is closed.
The liquid nitrogen is at the temperature of 196 ℃ below zero, the temperature can be rapidly reduced, the temperature reduction time of the furnace body 11 is effectively shortened, the test efficiency is improved, and the use is efficient and convenient.
Example two
On the basis of the above embodiment, as shown in fig. 2, one end of the cooling gas pipe 5 is connected to a scavenging gas pipe 6 installed on the furnace body 11 through a three-way joint, the scavenging gas pipe 6 is connected to a nitrogen tank 7, a switching valve 8 is installed on the scavenging gas pipe 6, and the switching valve 8 is located between the cooling gas pipe 5 and the nitrogen tank 7.
The nitrogen tank 7 is provided with a nitrogen valve 71, the nitrogen valve 71 is respectively connected with the scavenging pipe 6 and the protective gas pipe 72 through a three-way joint, the protective gas pipe 72 is also communicated with the furnace body 11, and the protective gas pipe 72 is used for introducing inert nitrogen to carry out the protection of the high-temperature cracking of the sample. The scavenging pipe 6 is used for introducing nitrogen to discharge the gas of the product of the sample in the high-temperature cracking process to the outside of the furnace body through the exhaust pipe 2. The nitrogen valve 71 controls the delivery of nitrogen.
The cooling air pipe 5 is connected with the original scavenging pipe 6, a new air pipe does not need to be arranged on the furnace body 11, the thermogravimetric analyzer is slightly changed, the operation is simple and convenient, and scavenging and cooling are controlled by the switching valve 8. And when cooling is needed, closing the switching valve 8, introducing liquid nitrogen for cooling, closing the liquid nitrogen valve 4 after cooling is finished, opening the switching valve 8, and continuing to test. During scavenging, the liquid nitrogen valve 4 is closed, the switching valve 8 is opened, and the nitrogen valve 71 is opened, so that scavenging is realized. The valve 8 is switched so that scavenging and cooling do not interfere with each other.
The cooling and scavenging share one pipeline, so that the pipeline is simple and convenient to use.
Claims (4)
1. A cooling device of a thermogravimetric analyzer comprises an exhaust pipe, a liquid nitrogen tank and a pressure regulating valve, wherein the pressure regulating valve is fixed on the liquid nitrogen tank; it is characterized by also comprising
One end of the cooling air pipe is positioned in the furnace body of the thermogravimetric analyzer, and the other end of the cooling air pipe is connected with the pressure regulating valve;
and the liquid nitrogen valve is arranged on the cooling air pipe.
2. The cooling apparatus of claim 1, wherein the liquid nitrogen valve is an electrically operated valve.
3. The cooling device of the thermogravimetric analyzer according to claim 1, further comprising a flow valve installed on the cooling gas pipe and located between the furnace body and the liquid nitrogen valve.
4. The cooling device for the thermogravimetric analyzer according to claim 1, wherein one end of the cooling gas pipe is connected to a scavenging pipe installed on the furnace body through a three-way joint, the scavenging pipe is connected to a nitrogen tank, and a switching valve is installed on the scavenging pipe and located between the cooling gas pipe and the nitrogen tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020098950.3U CN211739607U (en) | 2020-01-16 | 2020-01-16 | Cooling device of thermogravimetric analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020098950.3U CN211739607U (en) | 2020-01-16 | 2020-01-16 | Cooling device of thermogravimetric analyzer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211739607U true CN211739607U (en) | 2020-10-23 |
Family
ID=72882478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020098950.3U Active CN211739607U (en) | 2020-01-16 | 2020-01-16 | Cooling device of thermogravimetric analyzer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211739607U (en) |
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2020
- 2020-01-16 CN CN202020098950.3U patent/CN211739607U/en active Active
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| CP01 | Change in the name or title of a patent holder |
Address after: 215200 east of Shunfeng Road West of Longqiao Road, Wujiang Economic and Technological Development Zone, Suzhou City, Jiangsu Province Patentee after: Huaye Testing Technology Service Co.,Ltd. Address before: 215200 east of Shunfeng Road West of Longqiao Road, Wujiang Economic and Technological Development Zone, Suzhou City, Jiangsu Province Patentee before: SUZHOU HUAYE DETECTION TECHNOLOGY SERVICE Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |