Inert gas mole ratio detector for drying oven and drying oven

Abstract

The utility model provides an inert gas molar ratio detector for oven and oven, the inert gas molar ratio detector comprises: a lead-in section in which a first temperature detector and a first pressure detector are arranged; a second temperature detector and a second pressure detector are arranged in the testing section, and the testing section is further connected with an inert gas concentration measuring instrument; the cooling section is connected between the introduction section and the test section, and at least part of the outside of the cooling section is provided with a cooling water flow channel in a surrounding manner; the controller is electrically connected with the first temperature detector, the first pressure detector, the second temperature detector, the second pressure detector and the inert gas concentration measuring instrument. According to the utility model, the molar ratio concentration of the inert gas under work can be detected in real time in the working state of the drying oven.

Description

Technical Field

[0001] The utility model belongs to the technical field of inert gas detection, and particularly relates to an inert gas molar ratio detector for an oven and the oven. Background Art

[0002] Ovens for perfluoroether rubber products are mainly used for curing, heat treatment and drying. Curing is the process of solidifying perfluoroether rubber in a mold by heating to obtain the desired physical properties and shape; heat treatment is the post-processing of the product to improve its mechanical properties and chemical resistance; drying is the removal of solvents or moisture that may remain during the processing to ensure the quality of the final product. Perfluoroether rubber may undergo oxidation reactions during high-temperature treatment. Inert gases, such as nitrogen or helium, can provide an oxygen-free environment to prevent oxidation. The use of inert gases can ensure the chemical stability of the material during processing, thereby improving the performance and life of the final product. Inert gases can reduce the risk of fire and explosion, especially during high temperature or chemical reactions. Therefore, ovens and inert gases in the field of perfluoroether rubber products play an important role in the processing process. However, the inert protective gas ovens currently used in the perfluoroether field cannot detect the molar concentration of the inert gas in real time when the oven is working. Utility Model Content

[0003] In view of the above shortcomings of the prior art, the purpose of the present invention is to provide an inert gas molar fraction detector and an oven for use in an oven, so as to solve the problem that the existing oven cannot realize real-time detection of the molar fraction concentration of the inert gas under working state.

[0004] To achieve the above-mentioned and other related purposes, the present invention provides an inert gas molar fraction detector for an oven, comprising:

[0005] an introduction section, wherein a first temperature detector and a first pressure detector are provided in the introduction section;

[0006] a test section, wherein a second temperature detector and a second pressure detector are provided in the test section, and the test section is also connected to an inert gas concentration measuring instrument;

[0007] a cooling section, the cooling section being connected between the introduction section and the testing section, and a cooling water channel being arranged around at least a portion of an exterior of the cooling section;

[0008] A controller is electrically connected to the first temperature detector, the first pressure detector, the second temperature detector, the second pressure detector, and the inert gas concentration measuring instrument.

[0009] In one embodiment of the present invention, the cooling section is in a U-shaped structure, and two ends of the U-shaped structure are respectively connected to the introduction section and the testing section.

[0010] In one embodiment of the present invention, the cooling section includes a plurality of U-shaped tubes connected in series.

[0011] In one embodiment of the present invention, the inner wall of the cooling section is covered with a Teflon coating.

[0012] In one embodiment of the present invention, the cooling section is made of aluminum alloy.

[0013] In one embodiment of the present invention, the cooling section is connected to a condensate discharge outlet.

[0014] In one embodiment of the present invention, along the axial direction of the cooling section, the flow direction of the cooling water in the cooling water flow channel is opposite to the flow direction of the gas in the cooling section.

[0015] In one embodiment of the present invention, the controller calculates the molar fraction A2 of the inert gas based on the temperature value T1 of the first temperature detector, the pressure value P1 of the first pressure detector, the temperature value T2 of the second temperature detector, the pressure value P2 of the second pressure detector, and the molar fraction measurement value A1 of the inert gas concentration measuring instrument, wherein the molar fraction A2 is the quotient obtained by multiplying the product of the absolute temperature value of the temperature value T1 and the pressure value P2 by the product of the absolute temperature value of the temperature value T2 and the pressure value P1, and then multiplying it by the molar fraction measurement value A1.

[0016] In one embodiment of the present invention, the second temperature detector and the second pressure detector are located on a side of the inert gas concentration measuring instrument close to the cooling section.

[0017] The present invention also provides an oven, comprising: an oven body and an inert gas molar fraction detector for an oven as described in any one of the above embodiments, wherein the introduction section of the inert gas molar fraction detector is connected to the exhaust port of the oven body.

[0018] The utility model proposes an inert gas molar fraction detector for an oven and an oven. The inert gas molar fraction detector is provided with an introduction section, a cooling section and a testing section. The introduction section is connected to the exhaust port of the oven to introduce the inert gas. The first temperature and the first pressure of the high-temperature gas are detected and obtained in the introduction section. After the high-temperature inert gas passes through the cooling section, the liquid substance at room temperature is condensed and retained in the condensation section. The remaining gas passes through the testing section to obtain the second temperature, the second pressure and the molar concentration of the inert gas after condensation. The molar fraction of the inert gas in the oven is obtained according to the above temperature, pressure and molar concentration of the inert gas. Therefore, the molar fraction concentration of the inert gas under working condition can be detected in real time when the oven is in working condition. The online detection can protect disulfide more fully and avoid the influence of air on disulfide. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 Schematic diagram of the structure of an inert gas molar fraction detector in one embodiment of the present invention.

[0021] Description of labels:

[0022] 10. Introduction section; 20. Test section; 30. Cooling section; 11. First temperature detector; 12. First pressure detector; 21. Second temperature detector; 22. Second pressure detector; 23. Inert gas concentration measuring instrument; 31. Cooling water flow channel; 32. Condensate discharge outlet. DETAILED DESCRIPTION

[0023] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different perspectives and applications without departing from the spirit of the present invention.

[0024] It should be noted that the illustrations provided in this embodiment are only used to schematically illustrate the basic concept of the present invention. Therefore, the illustrations only show components related to the present invention and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0025] See also Figure 1 As shown, the utility model proposes an inert gas molar fraction detector for an oven and an oven, so as to solve the problem that the existing oven cannot realize real-time detection of the molar fraction concentration of the inert gas under working state. Specifically, the inert gas molar proportion detector includes an introduction section 10, a test section 20, a cooling section 30 and a controller. The introduction section 10 is connected to the exhaust port of the oven, and the cooling section 30 is connected between the introduction section 10 and the test section 20. A first temperature detector 11 and a first pressure detector 12 are provided in the introduction section 10. The temperature value T1 of the introduced gas is detected by the first temperature detector 11, and the pressure value P1 of the introduced gas is detected by the first pressure detector 12. A cooling water flow channel 31 is provided around at least part of the outside of the cooling section 30. Cooling water flows in the cooling water flow channel 31 to cool the gas introduced from the introduction section 10 so that the liquid substance at room temperature is condensed. A second temperature detector 21, a second pressure detector 22 and an inert gas concentration measuring instrument 23 are also provided in the test section 20. The second temperature detector 21 and the second pressure detector 22 are located on the side of the inert gas concentration measuring instrument 23 close to the cooling section 30. The gas condensed after passing through the cooling section 20 is The gas flowing through the test section 20 passes through the second temperature detector 21, the second pressure detector 22 and the inert gas concentration measuring instrument 23 and is then discharged. The temperature value T2 of the condensed gas is detected by the second temperature detector 21, the pressure value P2 of the condensed gas is detected by the second pressure detector 22, and the molar fraction measurement value A1 of a certain inert gas after condensation is detected by the inert gas concentration measuring instrument 23. The controller is electrically connected to the first temperature detector 11, the first pressure detector 12, the second temperature detector 21, the second pressure detector 22 and the inert gas concentration measuring instrument 23. The controller calculates the molar fraction A2 of a certain inert gas based on the temperature value T1 of the first temperature detector 11, the pressure value P1 of the first pressure detector 12, the temperature value T2 of the second temperature detector 21, the pressure value P2 of the second pressure detector 22 and the molar fraction measurement value A1 of the inert gas concentration measuring instrument 23, thereby realizing real-time detection of the working molar fraction concentration of a certain inert gas when the oven is in the working state.

[0026] See also Figure 1 As shown, in this embodiment, the cooling section 30 has a U-shaped structure, with its ends connected to the introduction section 10 and the test section 20, respectively. A cooling water channel 31 is disposed around the outer periphery of the U-shaped cooling section 30. The U-shaped cooling section 30 allows the condensed material to accumulate within the U-shaped structure, preventing backflow and ensuring safety. Furthermore, the cooling section 30 can be configured to consist of multiple U-shaped tubes connected in series, each of which can be surrounded by a cooling water channel 31 to enhance the condensation effect.

[0027] See also Figure 1 As shown, in this embodiment, along the axial direction of the cooling section 30 , the flow direction of the cooling water in the cooling water channel 31 is opposite to the flow direction of the gas in the cooling section 30 , that is, the cooling water and the gas flow in counter-currents, thereby improving the condensation effect of the condensation section 30 .

[0028] See also Figure 1 As shown, in this embodiment, the cooling section 30 can be configured to be made of a metal material with good thermal conductivity, such as an aluminum alloy, to improve heat exchange efficiency and thus enhance the condensation effect of the cooling section 30. It is also understood that due to the condensation of gas in the condensation section 30, the condensate formed by the condensation will accumulate within the condensation section 30, which is somewhat corrosive. Therefore, in this embodiment, the inner wall of the cooling section 30 is coated with Teflon to improve the corrosion resistance of the cooling section 30. Furthermore, the cooling section 30 is also connected to a condensate drain port 32, through which the condensate accumulated in the cooling section 30 can be discharged. It is understood that during the detection process, the condensate drain port 32 is closed to prevent gas leakage and inaccurate test results. After the test is completed, the condensate drain port 32 can be opened to discharge the condensate.

[0029] See also Figure 1 As shown, in this embodiment, the controller calculates the molar fraction A2 of the inert gas based on the temperature value T1 of the first temperature detector 11, the pressure value P1 of the first pressure detector 12, the temperature value T2 of the second temperature detector 21, the pressure value P2 of the second pressure detector 22, and the molar fraction measurement value A1 of the inert gas concentration measuring instrument 23. The molar fraction A2 is obtained by dividing the product of the absolute temperature value of the temperature value T1 and the pressure value P2 by the product of the absolute temperature value of the temperature value T2 and the pressure value P1, and then multiplying it by the molar fraction measurement value A1. Among them, the absolute temperature value of the temperature value T1 refers to the temperature value T1+273.15, and the absolute temperature value of the temperature value T2 refers to the temperature value T2+273.15. For example, in this embodiment, the controller can be set as a microcontroller, and the first temperature detector 11, the first pressure detector 12, the second temperature detector 21, the second pressure detector 22, and the inert gas concentration measuring instrument 23 are connected to the processing chip of the microcontroller, and the code is written on the processing chip to implement the given calculation formula: The processing chip reads the sensor data, performs calculations, and outputs the results.

[0030] See also Figure 1As shown, the present invention also proposes an oven, an oven body and an inert gas molar fraction detector for the oven as described in any one of the above embodiments, the introduction section of the inert gas molar fraction detector is connected to the exhaust port of the oven body, and the inert gas molar fraction detector has the same or similar structure as that described in the above embodiments. To avoid repetition, it will not be repeated here.

[0031] See also Figure 1 As shown, in this embodiment, the first temperature detector 11 and the second temperature detector 21 can be configured as temperature probes, the first pressure detector 12 and the second pressure detector 22 can be configured as pressure probes, and the inert gas concentration measuring instrument 23 can be configured as a corresponding measuring instrument according to the type of inert gas to be detected. For example, when it is necessary to detect the molar ratio of nitrogen, the inert gas concentration measuring instrument 23 can be configured as a nitrogen concentration measuring instrument. Of course, other inert gases can also be used. The oven can be an inert protective gas oven used in the perfluoroether field, or other ovens using inert gas protection.

[0032] The utility model proposes an inert gas molar fraction detector for an oven and an oven. The inert gas molar fraction detector is provided with an introduction section, a cooling section and a testing section. The introduction section is connected to the exhaust port of the oven to introduce the inert gas. The first temperature and the first pressure of the high-temperature gas are detected and obtained in the introduction section. After the high-temperature inert gas passes through the cooling section, the liquid substance at room temperature is condensed and retained in the condensation section. The remaining gas passes through the testing section to obtain the second temperature, the second pressure and the molar concentration of the inert gas after condensation. The molar fraction of the inert gas in the oven is obtained according to the above temperature, pressure and molar concentration of the inert gas. Therefore, the molar fraction concentration of the inert gas under working condition can be detected in real time when the oven is in working condition. The online detection can protect disulfide more fully and avoid the influence of air on disulfide.

[0033] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the scope of protection of the present invention.

[0034] Except for the technical features described in the specification, the remaining technical features are known technologies to those skilled in the art. In order to highlight the innovative features of the present invention, the remaining technical features will not be described here in detail.

Claims

1. An inert gas molar fraction detector for an oven, characterized in that: include: an introduction section, wherein a first temperature detector and a first pressure detector are provided in the introduction section; a test section, wherein a second temperature detector and a second pressure detector are provided in the test section, and the test section is also connected to an inert gas concentration measuring instrument; a cooling section, the cooling section being connected between the introduction section and the testing section, and a cooling water channel being arranged around at least a portion of an exterior of the cooling section; A controller is electrically connected to the first temperature detector, the first pressure detector, the second temperature detector, the second pressure detector, and the inert gas concentration measuring instrument.

2. The inert gas molar fraction detector for an oven according to claim 1, characterized in that: The cooling section is in a U-shaped structure, and two ends of the U-shaped structure are respectively connected to the introduction section and the testing section.

3. The inert gas molar fraction detector for an oven according to claim 2, characterized in that: The cooling section includes a plurality of U-shaped tubes connected in series.

4. The inert gas molar fraction detector for an oven according to claim 1, characterized in that: The inner wall of the cooling section is covered with a Teflon coating.

5. The inert gas molar fraction detector for an oven according to claim 1, characterized in that: The cooling section is made of aluminum alloy.

6. The inert gas molar fraction detector for an oven according to claim 1, characterized in that: The cooling section is connected to a condensate discharge port.

7. The inert gas molar fraction detector for an oven according to claim 1, characterized in that: Along the axial direction of the cooling section, the flow direction of the cooling water in the cooling water flow channel is opposite to the flow direction of the gas in the cooling section.

8. The inert gas molar fraction detector for an oven according to claim 1, characterized in that: The controller calculates the molar proportion A2 of the inert gas based on the temperature value T1 of the first temperature detector, the pressure value P1 of the first pressure detector, the temperature value T2 of the second temperature detector, the pressure value P2 of the second pressure detector, and the molar proportion measurement value A1 of the inert gas concentration measuring instrument, wherein the molar proportion A2 is the quotient obtained by multiplying the product of the absolute temperature value of the temperature value T1 and the pressure value P2 by the product of the absolute temperature value of the temperature value T2 and the pressure value P1, and then multiplying it by the molar proportion measurement value A1.

9. The inert gas molar fraction detector for an oven according to claim 1, characterized in that: The second temperature detector and the second pressure detector are located on a side of the inert gas concentration measuring instrument close to the cooling section.

10. An oven, characterized in that: include: An oven body and the inert gas molar fraction detector for an oven as claimed in any one of claims 1 to 9, wherein the introduction section of the inert gas molar fraction detector is connected to the exhaust port of the oven body.

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