CN112408816A - Optical fiber deuterium treatment device and process - Google Patents

Optical fiber deuterium treatment device and process Download PDF

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Publication number
CN112408816A
CN112408816A CN202011379809.1A CN202011379809A CN112408816A CN 112408816 A CN112408816 A CN 112408816A CN 202011379809 A CN202011379809 A CN 202011379809A CN 112408816 A CN112408816 A CN 112408816A
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Prior art keywords
deuterium
valve
pressure
gas
nitrogen
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李英杰
罗专文
陈涛
李聃
王勇
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Wuhan Yuanjing Technology Co ltd
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Wuhan Yuanjing Technology Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
    • C03C25/66—Chemical treatment, e.g. leaching, acid or alkali treatment

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  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)

Abstract

The invention discloses an optical fiber deuterium treatment device, which comprises at least one treatment box component, a deuterium component, a nitrogen component and a vacuumizing component, wherein the treatment box component comprises a treatment box, and the inside of the treatment box is hollow; the deuterium assembly comprises a deuterium reservoir, a deuterium communicating pipe, a first flowmeter and a first valve, wherein two ends of the deuterium communicating pipe are respectively communicated with the deuterium reservoir and the treatment box, and the first flowmeter and the first valve are both arranged on the deuterium communicating pipe; the nitrogen component comprises a nitrogen storage device, a nitrogen communicating pipe, a second flowmeter and a second valve, two ends of the nitrogen communicating pipe are respectively communicated with the nitrogen storage device and the treatment box, and the second flowmeter and the second valve are both arranged on the nitrogen communicating pipe; the vacuumizing assembly comprises a vacuum pump, an exhaust pipe and a third valve, one end of the exhaust pipe is communicated with the air inlet end of the vacuum pump, the other end of the exhaust pipe is communicated with the processing box, and the third valve is arranged on the exhaust pipe. The invention has low cost compared with the direct purchase of the mixed gas.

Description

Optical fiber deuterium treatment device and process
Technical Field
The invention relates to the field of optical fiber treatment devices, in particular to an optical fiber deuterium treatment device and process.
Background
At present, when an optical fiber is treated, the optical fiber to be treated is arranged in a treatment box, and then mixed gas of deuterium and nitrogen with specified concentration purchased from a gas manufacturer is conveyed to the treatment box through a gas pipeline to treat the optical fiber.
Such direct purchase of a mixed gas of deuterium and nitrogen at a predetermined concentration is expensive compared to the cost of obtaining a mixed gas by mixing deuterium and nitrogen, resulting in high processing costs for optical fibers.
Disclosure of Invention
In view of the above, it is necessary to provide an optical fiber deuterium treatment apparatus and process, which solve the technical problem of relatively high cost of directly purchasing a mixture of deuterium and nitrogen with a concentration in the prior art.
In order to achieve the above technical object, an embodiment of the present invention provides an optical fiber deuterium treatment apparatus, including:
at least one processing tank assembly comprising a processing tank having an interior hollow;
the deuterium assembly comprises a deuterium storage device, a deuterium communicating pipe, a first flow meter and a first valve, wherein two ends of the deuterium communicating pipe are respectively communicated with the deuterium storage device and the treatment box, and the first flow meter and the first valve are both arranged on the deuterium communicating pipe;
the nitrogen assembly comprises a nitrogen storage, a nitrogen communicating pipe, a second flowmeter and a second valve, wherein two ends of the nitrogen communicating pipe are respectively communicated with the nitrogen storage and the treatment box, and the second flowmeter and the second valve are arranged on the nitrogen communicating pipe;
the vacuumizing assembly comprises a vacuum pump, an exhaust pipe and a third valve, one end of the exhaust pipe is communicated with the air inlet end of the vacuum pump, the other end of the exhaust pipe is communicated with the treatment box, and the third valve is arranged on the exhaust pipe.
Further, the deuterium gas component further comprises a first pressure regulating valve and a first pressure gauge, the first pressure regulating valve, the first pressure gauge, the first flowmeter and the first valve are sequentially arranged in the deuterium gas communicating pipe along the gas flowing direction in the deuterium gas communicating pipe, and the first pressure gauge is used for detecting and displaying the gas pressure in the deuterium gas communicating pipe.
Further, the nitrogen component still includes second pressure regulating valve and second manometer, second pressure regulating valve, second manometer, second flowmeter and second valve are followed gas flow direction in the nitrogen gas communicating pipe sets gradually in nitrogen gas communicating pipe, the second manometer is used for detecting and showing atmospheric pressure in the nitrogen gas communicating pipe.
Furthermore, the optical fiber deuterium treatment device further comprises an air assembly, wherein the air assembly comprises an air pipeline and a fourth valve, the air pipeline is communicated with the treatment box, and the fourth valve is arranged on the air pipeline.
Furthermore, the optical fiber deuterium treatment device further comprises a sampling assembly, wherein the sampling assembly comprises a deuterium concentration analyzer, a sampling air inlet pipeline and a fifth valve, one end of the sampling air inlet pipeline is communicated with the treatment box, the other end of the sampling air inlet pipeline is communicated with the air inlet end of the deuterium concentration analyzer, and the fifth valve is arranged in the sampling air inlet pipeline.
Furthermore, the sampling assembly further comprises a sampling gas outlet pipeline, a needle valve and a third flow meter, one end of the sampling gas outlet pipeline is communicated with the gas outlet end of the deuterium gas concentration analyzer, and the needle valve and the third flow meter are sequentially arranged in the sampling gas outlet pipeline along the gas flowing direction in the sampling gas outlet pipeline.
Further, the optical fiber deuterium gas treatment device further comprises a pressure sensor for detecting the gas pressure in the treatment box.
Further, the first flow meter and the second flow meter are both mass flow controllers.
The invention also relates to an optical fiber deuterium treatment process which is carried out by using the optical fiber deuterium treatment device and comprises the following steps:
(1) placing the optical fiber to be processed in the processing box;
(2) adjusting the second pressure adjusting valve to enable the second pressure gauge to reach a preset numerical value;
(3) adjusting the first pressure adjusting valve to enable the first pressure gauge to reach a preset numerical value;
(4) opening the fifth valve, adjusting the needle valve, and controlling the third flow meter to enable the sampling flow to be a preset value;
(5) opening the third valve, starting the vacuum pump, vacuumizing the treatment box and maintaining the pressure for a period of time, detecting the internal pressure of the treatment box through the pressure sensor, and checking the air tightness of the treatment box;
(6) opening the second valve, closing the second valve after the pressure sensor detects that the processing box reaches a certain pressure, starting the vacuum pump to vacuumize the processing box and closing the third valve;
(7) opening the first valve and the second valve, and controlling the proportion of deuterium gas and nitrogen gas entering the treatment box through the first flow meter and the second flow meter so that the gas pressure in the treatment box reaches a preset process treatment pressure and the optical fiber is treated;
(8) after the treatment is carried out for a preset time, carrying out deuterium concentration detection by the deuterium concentration analyzer, carrying out pressure detection by the pressure sensor in the treatment process, opening the first valve and the second valve when the pressure is reduced and exceeds a process allowable deviation range or the deuterium concentration exceeds the deviation range, and controlling the gas supplementing proportion of deuterium and nitrogen entering the treatment box by the first flow meter and the second flow meter so that the gas pressure in the treatment box maintains a preset process treatment pressure;
(9) after the optical fiber is processed for a preset time, opening the third valve, starting the vacuum pump, and vacuumizing the processing box;
(10) and opening the fourth valve, and taking out the optical fiber in the treatment box when the air pressure in the treatment box detected by the pressure sensor is consistent with the ambient air pressure.
Further, in the step (7), the ratio of the flow rates of the deuterium gas and the nitrogen gas entering the treatment tank is calculated by:
setting deuterium gas proportioning flow rate mu(D)Volume V(D)Pressure P(D)Nitrogen gas proportioning flow rate mu(N)Volume V(N)Pressure P(N)The deuterium gas process proportioning concentration is X%, and the full-range flow v of the first flowmeter(D)The full-range flow volume v of the second flowmeter(N)Pressure of the vacuum in the treatment chamber when filling the mixed gas of deuterium and nitrogen0Pressure P in the treatment tank at the end of filling the deuterium-nitrogen mixture1；
The calculation formula of the ratio flow of deuterium gas to nitrogen gas is as follows:
Figure BDA0002809060320000041
when the treatment box is filled with mixed gas of deuterium and nitrogen, the ratio of the proportioning flow rates of the deuterium and the nitrogen is equal to the ratio of the filling volumes and the ratio of the filling pressures.
Compared with the prior art, the invention has the beneficial effects that: place the optic fibre in the case of handling in, open the third valve, start the vacuum pump, will handle the incasement through the vacuum pump and take out to vacuum and pressurize a period, can detect and handle whether gas leakage of case, open the second valve, handle the case with nitrogen gas introduction, a period of time back, close the second valve, start the vacuum pump and will handle the case and take out to vacuum once more, then close the third valve, open first valve and second valve, through first flowmeter and second flowmeter with quantitative deuterium gas and nitrogen gas introduction processing case, handle the optic fibre, it is with low costs to purchase the gas of mixing directly relatively, and can adjust the concentration of deuterium gas as required.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and together with the description, serve to explain the principles of the invention and not to limit the scope of the invention.
The invention provides an optical fiber deuterium gas treatment device, which comprises at least one treatment box assembly 1, a deuterium gas assembly 2, a nitrogen gas assembly 3, a vacuumizing assembly 4 and an air assembly 5, wherein the treatment box assembly 1 comprises a treatment box 11, and the interior of the treatment box 11 is hollow as shown in figure 1.
Specifically, each treatment tank assembly 1 further comprises a first fixed pipe 12, a second fixed pipe 13, a sixth valve 14 and a seventh valve 15, one end of each of the first fixed pipe 12 and the second fixed pipe 13 is communicated with the treatment tank 11, and the sixth valve 14 and the seventh valve 15 are arranged on the first fixed pipe 12 and the second fixed pipe 13 respectively.
Wherein, the quantity of handling case subassembly 1 can be one, two, three, four etc. specifically, the quantity of handling case subassembly 1 is three, and three handling case subassembly 1 interval sets up.
The processing chamber 11 may be any of various reactors, and in the present embodiment, the processing chamber 11 is a case having an end cover or a case cover, but the structure and type of the processing chamber 11 are not limited thereto.
The deuterium assembly 2 comprises a deuterium reservoir 21, a deuterium communicating pipe 22, a first flowmeter 23 and a first valve 24, wherein two ends of the deuterium communicating pipe 22 are respectively communicated with the deuterium reservoir 21 and the treatment tank 11, and the first flowmeter 23 and the first valve 24 are both arranged on the deuterium communicating pipe 22.
The deuterium gas reservoir 21 may be a pipe for supplying deuterium gas, and may be a storage cylinder storing deuterium gas, and in this embodiment, the deuterium gas reservoir 21 is a storage cylinder storing deuterium gas.
The first valve 24 may be a manual valve, a pneumatic valve, a solenoid valve, etc., and in the present embodiment, the first valve 24 is a pneumatic valve.
In this embodiment, the deuterium gas assembly 2 further includes a first pressure regulating valve 25 and a first pressure gauge 26, the first pressure regulating valve 25, the first pressure gauge 26, the first flowmeter 23 and the first valve 24 are sequentially disposed on the deuterium gas communication pipe 22 along the gas flowing direction in the deuterium gas communication pipe 22, and the first pressure gauge 26 is used for detecting and displaying the gas pressure in the deuterium gas communication pipe 22.
The nitrogen assembly 3 comprises a nitrogen storage 31, a nitrogen communicating pipe 32, a second flow meter 33 and a second valve 34, two ends of the nitrogen communicating pipe 32 are respectively communicated with the nitrogen storage 31 and the treatment tank 11, and the second flow meter 33 and the second valve 34 are both arranged on the nitrogen communicating pipe 32.
The nitrogen storage 31 may be a pipe for supplying nitrogen, or a steel cylinder for storing nitrogen, and in the embodiment, the nitrogen storage 31 is a pipe for supplying nitrogen, but the type of the nitrogen storage 21 is not limited thereto.
The first flow meter 23 and the second flow meter 33 may be differential pressure type flow meters, rotor flow meters, volume flow meters, electromagnetic flow meters, etc., and in the present embodiment, the first flow meter 23 and the second flow meter 33 are mass flow controllers.
The second valve 34 may be a manual valve, a pneumatic valve, a solenoid valve, etc., and in this embodiment, the second valve 34 is a pneumatic valve.
In this embodiment, the nitrogen component 3 further includes a second pressure regulating valve 35 and a second pressure gauge 36, the second pressure regulating valve 35, the second pressure gauge 36, the second flow meter 33 and the second valve 34 are sequentially disposed in the nitrogen communication pipe 32 along the gas flowing direction in the nitrogen communication pipe 32, and the second pressure gauge 36 is used for detecting and displaying the gas pressure in the nitrogen communication pipe 32.
The vacuum pumping assembly 4 comprises a vacuum pump 41, a pumping tube 42 and a third valve 43, wherein one end of the pumping tube 42 is communicated with the air inlet end of the vacuum pump 41, the other end of the pumping tube 42 is communicated with the processing box 11, and the third valve 43 is arranged on the pumping tube 42.
The third valve 43 may be a manual valve, an air-operated valve, an electromagnetic valve, etc., and in this embodiment, the third valve 43 is an air-operated valve.
The air unit 5 includes an air line 51 and a fourth valve 52, the air line 51 communicating with the processing tank 11, the fourth valve 52 being provided to the air line 51.
The fourth valve 52 may be a manual valve, a pneumatic valve, a solenoid valve, etc., and in the present embodiment, the fourth valve 52 is a pneumatic valve.
In the present invention, the optical fiber deuterium treatment apparatus further comprises a sampling assembly 6, the sampling assembly 6 comprises a deuterium concentration analyzer 61, a sampling gas inlet pipe 62 and a fifth valve 63, one end of the sampling gas inlet pipe 62 is communicated with the treatment tank 11, the other end of the sampling gas inlet pipe 62 is communicated with the gas inlet end of the deuterium concentration analyzer 61, and the fifth valve 63 is disposed in the sampling gas inlet pipe 62.
Wherein, one end of the sampling air inlet pipeline 62 is communicated with the other ends of the second fixed pipes 13 in the three treatment box assemblies 1.
The fifth valve 63 may be a manual valve, an air-operated valve, an electromagnetic valve, etc., and in this embodiment, the fifth valve 63 is an air-operated valve.
Specifically, the sampling assembly 6 further includes a sampling gas outlet pipe 64, a needle valve 65 and a third flow meter 66, one end of the sampling gas outlet pipe 64 is communicated with the gas outlet end of the deuterium concentration analyzer 61, and the needle valve 65 and the third flow meter 66 are sequentially disposed in the sampling gas outlet pipe 64 along the gas flow direction in the sampling gas outlet pipe 64.
The pressure and flow rate of the gas during sampling and calibration are controlled by the needle valve 65 and the third flow meter 66.
Specifically, sampling assembly 6 still includes calibration pipe 67 and ball valve 68, and calibration pipe 67's one end is linked together with sample inlet line 62, and ball valve 68 sets up in calibration pipe 67.
By arranging the calibration pipe 67 and the ball valve 68, after the deuterium concentration analyzer 61 is used for a period of time, full-scale calibration gas is introduced into the calibration pipe 67 through the ball valve 68 and enters the deuterium concentration analyzer 61 through the calibration pipe 67, and full-scale calibration is performed on the deuterium concentration analyzer 61.
In the present invention, the optical fiber deuterium gas treatment apparatus further includes a main pipe 7, the main pipe 7 is communicated with the other ends of the first fixing pipes 12 of the three treatment tank assemblies 1, the deuterium gas communicating pipe 22 is communicated with the treatment tank 11 through the main pipe 7, the nitrogen gas communicating pipe 32 is communicated with the treatment tank 11 through the main pipe 7, the air suction pipe 42 is communicated with the treatment tank 11 through the main pipe 7, and the air pipe 51 is communicated with the treatment tank 11 through the main pipe 7.
In the present invention, the optical fiber deuterium gas treatment apparatus further includes a pressure sensor 8 for detecting the gas pressure in the treatment chamber 11.
The pressure sensor 8 is an air pressure sensor, which is disposed in the main pipe 7, and detects the air pressure in the corresponding processing box 11 by opening the corresponding sixth valve 14 in the processing box assembly 1.
The invention also provides an optical fiber deuterium treatment process, which comprises the following steps:
(1) the optical fiber to be processed is arranged in the processing box 11;
(2) adjusting the second pressure regulating valve 35 to make the second pressure gauge 36 reach a preset value;
(3) adjusting the first pressure regulating valve 25 so that the first pressure gauge 26 reaches a preset value;
(4) opening the fifth valve 63, adjusting the needle valve 65, and controlling the third flow meter 66 to enable the sampling flow to be a preset value;
specifically, the sampling flow rate of the third flow meter 66 is adjusted to 250 sccm.
(5) Opening the third valve 43, starting the vacuum pump 41, pumping the processing box 11 to vacuum and maintaining the pressure for a period of time, detecting the internal pressure of the processing box 11 through the pressure sensor 8, and checking the air tightness of the processing box 11;
the third valve 43 is opened before the vacuum pump 41 is opened, and the third valve 43 is closed after the vacuum pump 41 is closed.
(6) Opening the second valve 34, closing the second valve 34 when the pressure sensor 8 detects that the processing box 11 reaches a certain pressure, starting the vacuum pump 41 to pump the processing box 11 to vacuum and closing the third valve 43;
when nitrogen gas is introduced into the processing chamber 11 by opening the second valve 34 and the processing chamber 11 is filled with nitrogen gas to a predetermined pressure, the vacuum pump 41 is started to evacuate the inside of the processing chamber 11, and the air in the processing chamber 11 is replaced with clean air.
(7) Opening the first valve 24 and the second valve 34, controlling the ratio of deuterium gas and nitrogen gas entering the processing box 11 through the first flow meter 23 and the second flow meter 33, so that the gas pressure in the processing box 11 reaches the preset process processing pressure, and starting to process the optical fiber;
(8) after the treatment is carried out for a preset time, the deuterium concentration analyzer 61 is used for detecting the deuterium concentration, the pressure sensor 8 is used for detecting the pressure in the treatment process, when the pressure is reduced and exceeds the process allowable deviation range or the deuterium concentration exceeds the deviation range, the first valve 24 and the second valve 34 are opened, the gas supplementing proportion of deuterium and nitrogen entering the treatment box 11 is controlled through the first flow meter 23 and the second flow meter 33, and the gas pressure in the treatment box 11 is kept at the preset process treatment pressure;
(9) after the optical fiber is processed for the preset time, opening a third valve 43, starting a vacuum pump 41, and pumping the processing box 11 to vacuum;
(10) when the pressure inside the processing chamber 11 detected by the pressure sensor 8 is equal to the ambient pressure by opening the fourth valve 52, the optical fiber inside the processing chamber 11 is taken out.
By opening the fourth valve 52, since the gas in the processing chamber 11 is communicated with the outside air through the air line 51, the pressure in the processing chamber 11 can be equalized, and the optical fiber in the processing chamber 11 can be taken out easily.
In this embodiment, in step (7), the ratio of the flow rates of the deuterium gas and the nitrogen gas entering the processing chamber 11 is calculated by:
setting deuterium gas proportioning flow rate mu(D)Volume V(D)Pressure P(D)Nitrogen gas proportioning flow rate mu(N)Volume V(N)Pressure P(N)Deuterium gas process proportioning concentration X%, first flowmeter 23 full-range flow v(D) Second flow meter 33 full range flow v(N)Vacuum pressure P in the pressure treatment tank 11 when filling the mixed gas of deuterium and nitrogen0Pressure P in the treatment tank 11 at the end of filling the deuterium/nitrogen mixture1；
The calculation formula of the ratio flow of deuterium gas to nitrogen gas is as follows:
Figure BDA0002809060320000101
when the treatment box 11 is filled with mixed gas of deuterium and nitrogen, the ratio of the proportioning flow rates of the deuterium and the nitrogen is equal to the ratio of the filling volumes and the ratio of the filling pressures.
Since the inside of the treatment tank 11 before gas mixing is not absolutely evacuated, there is a residual gas, and the larger the capacity of the treatment tank 11 is, the lower the degree of vacuum that can be tolerated, the more gas remains during evacuation replacement, and the greater the influence on the concentration of deuterium after gas mixing, and ideally, if the evacuation pressure P is applied during evacuation replacement of the inside of the treatment tank 11 in step (6)0When the absolute pressure reaches 0, there is no residual gas in the processing chamber 11, but the pressure receiving capacity of the processing chamber 11 and the performance of the vacuum pump 41 itself affect that the inside of the processing chamber 11 cannot be brought to an absolute vacuum during evacuation replacement, so the effect of residual gas on the concentration of deuterium after mixing is subtracted when calculating the ratio flow rate of deuterium and nitrogen. Filling the mixed gas of deuterium and nitrogen into the processing box 11 according to the ratio of deuterium to nitrogen calculated by the formula in the step (10) until the process processing pressure P is reached1Then, the concentration of deuterium in the treatment tank 11 can be accurately controlled to be X% of the process proportioning concentration set by an operator.
In this embodiment, the optical fiber deuterium treatment process further includes the following steps:
when the pressure sensor 8 detects that the internal pressure of the processing box 11 is reduced and exceeds the consumption range allowed by the process, the first valve 24 and the second valve 34 are opened, the first flow meter 23 and the second flow meter 33 supplement the mixed gas of deuterium and nitrogen according to the deuterium process proportioning concentration X%, and when the processing box 11 supplements the mixed gas of deuterium and nitrogen, the proportioning concentration of deuterium and nitrogen is calculated according to the following formula:
Figure BDA0002809060320000102
the deuterium and nitrogen are mixed and enter the process treatment stage, the process treatment stage is influenced by the quality of the optical fiber product, the deuterium inside the treatment box 11 can be consumed, and the consumption can be compensated by supplementing the deuterium and nitrogen into the treatment box 11.
In this embodiment, the method further includes the step of (11) opening the sixth valve 14 and the seventh valve 15 of another processing box assembly 1 after processing the optical fiber in one processing box 11, and processing the optical fiber in the next processing box assembly 1.
The optical fibers in one processing box 11 can be processed by using the time when the optical fibers in another processing box 11 are taken out, so that the processing boxes 11 can be used independently or in combination; the pressure of the deuterium gas can be adjusted according to the requirement, so that the pressure of the deuterium gas meets the process requirement; the concentration of deuterium can be set as required, the proportion of deuterium and nitrogen is controllable, the gas mixing precision is guaranteed, and the gas purchase cost is reduced.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.

Claims (10)

1. An optical fiber deuterium treatment device, comprising:
at least one processing tank assembly comprising a processing tank having an interior hollow;
the deuterium assembly comprises a deuterium storage device, a deuterium communicating pipe, a first flow meter and a first valve, wherein two ends of the deuterium communicating pipe are respectively communicated with the deuterium storage device and the treatment box, and the first flow meter and the first valve are both arranged on the deuterium communicating pipe;
the nitrogen assembly comprises a nitrogen storage, a nitrogen communicating pipe, a second flowmeter and a second valve, wherein two ends of the nitrogen communicating pipe are respectively communicated with the nitrogen storage and the treatment box, and the second flowmeter and the second valve are arranged on the nitrogen communicating pipe;
the vacuumizing assembly comprises a vacuum pump, an exhaust pipe and a third valve, one end of the exhaust pipe is communicated with the air inlet end of the vacuum pump, the other end of the exhaust pipe is communicated with the treatment box, and the third valve is arranged on the exhaust pipe.
2. The optical fiber deuterium treatment device of claim 1, wherein the deuterium assembly further comprises a first pressure regulating valve and a first pressure gauge, wherein the first pressure regulating valve, the first pressure gauge, a first flow meter and a first valve are sequentially arranged in the deuterium communication pipe along the gas flowing direction in the deuterium communication pipe, and the first pressure gauge is used for detecting and displaying the gas pressure in the deuterium communication pipe.
3. The optical fiber deuterium gas treatment device according to claim 1, wherein the nitrogen assembly further comprises a second pressure regulating valve and a second pressure gauge, the second pressure regulating valve, the second pressure gauge, the second flow meter and the second valve are sequentially arranged in the nitrogen communicating pipe along the gas flowing direction in the nitrogen communicating pipe, and the second pressure gauge is used for detecting and displaying the gas pressure in the nitrogen communicating pipe.
4. The optical fiber deuterium treatment device of claim 1, further comprising an air assembly including an air line in communication with the treatment tank and a fourth valve disposed in the air line.
5. The optical fiber deuterium treatment device of claim 1, further comprising a sampling assembly, wherein the sampling assembly comprises a deuterium concentration analyzer, a sampling inlet pipe and a fifth valve, one end of the sampling inlet pipe is communicated with the treatment tank, the other end of the sampling inlet pipe is communicated with an inlet end of the deuterium concentration analyzer, and the fifth valve is arranged in the sampling inlet pipe.
6. The optical fiber deuterium gas treatment device according to claim 5, wherein the sampling assembly further comprises a sampling gas outlet pipe, a needle valve and a third flow meter, wherein one end of the sampling gas outlet pipe is communicated with the gas outlet end of the deuterium gas concentration analyzer, and the needle valve and the third flow meter are sequentially arranged in the sampling gas outlet pipe along the gas flow direction in the sampling gas outlet pipe.
7. The optical fiber deuterium treatment device of claim 1, further comprising a pressure sensor for detecting the gas pressure inside the treatment tank.
8. The optical fiber deuterium gas treatment device of claim 1, wherein the first flow meter and the second flow meter are both mass flow controllers.
9. An optical fiber deuterium treatment process using the optical fiber deuterium treatment apparatus according to any one of claims 1 to 8, comprising the steps of:
(1) placing the optical fiber to be processed in the processing box;
(2) adjusting the second pressure adjusting valve to enable the second pressure gauge to reach a preset numerical value;
(3) adjusting the first pressure adjusting valve to enable the first pressure gauge to reach a preset numerical value;
(4) opening the fifth valve, adjusting the needle valve, and controlling the third flow meter to enable the sampling flow to be a preset value;
(5) opening the third valve, starting the vacuum pump, vacuumizing the treatment box and maintaining the pressure for a period of time, detecting the internal pressure of the treatment box through the pressure sensor, and checking the air tightness of the treatment box;
(6) opening the second valve, closing the second valve after the pressure sensor detects that the processing box reaches a certain pressure, starting the vacuum pump to vacuumize the processing box and closing the third valve;
(7) opening the first valve and the second valve, and controlling the proportion of deuterium gas and nitrogen gas entering the treatment box through the first flow meter and the second flow meter so that the gas pressure in the treatment box reaches a preset process treatment pressure and the optical fiber is treated;
(8) after the treatment is carried out for a preset time, carrying out deuterium concentration detection by the deuterium concentration analyzer, carrying out pressure detection by the pressure sensor in the treatment process, opening the first valve and the second valve when the pressure is reduced and exceeds a process allowable deviation range or the deuterium concentration exceeds the deviation range, and controlling the gas supplementing proportion of deuterium and nitrogen entering the treatment box by the first flow meter and the second flow meter so that the gas pressure in the treatment box maintains a preset process treatment pressure;
(9) after the optical fiber is processed for a preset time, opening the third valve, starting the vacuum pump, and vacuumizing the processing box;
(10) and opening the fourth valve, and taking out the optical fiber in the treatment box when the air pressure in the treatment box detected by the pressure sensor is consistent with the ambient air pressure.
10. The optical fiber deuterium treatment process of claim 9, wherein in step (7), the ratio of the flow rates of deuterium and nitrogen entering the treatment chamber is calculated by:
setting deuterium gas proportioning flow rate mu(D)Volume V(D)Pressure P(D)Nitrogen gas proportioning flow rate mu(N)Volume V(N)Pressure P(N)The deuterium gas process proportioning concentration is X%, and the full-range flow v of the first flowmeter(D)The full-range flow volume v of the second flowmeter(N)Pressure of the vacuum in the treatment chamber when filling the mixed gas of deuterium and nitrogen0Pressure P in the treatment tank at the end of filling the deuterium-nitrogen mixture1；
The calculation formula of the ratio flow of deuterium gas to nitrogen gas is as follows:
Figure FDA0002809060310000041
when the treatment box is filled with mixed gas of deuterium and nitrogen, the ratio of the proportioning flow rates of the deuterium and the nitrogen is equal to the ratio of the filling volumes and the ratio of the filling pressures.
CN202011379809.1A 2020-11-30 2020-11-30 Optical fiber deuterium treatment device and process Pending CN112408816A (en)

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Application Number Priority Date Filing Date Title
CN202011379809.1A CN112408816A (en) 2020-11-30 2020-11-30 Optical fiber deuterium treatment device and process

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Application Number Priority Date Filing Date Title
CN202011379809.1A CN112408816A (en) 2020-11-30 2020-11-30 Optical fiber deuterium treatment device and process

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CN112408816A true CN112408816A (en) 2021-02-26

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