CN109340571A - Nitrogen supply system and its control method - Google Patents
Nitrogen supply system and its control method Download PDFInfo
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- CN109340571A CN109340571A CN201811462088.3A CN201811462088A CN109340571A CN 109340571 A CN109340571 A CN 109340571A CN 201811462088 A CN201811462088 A CN 201811462088A CN 109340571 A CN109340571 A CN 109340571A
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- nitrogen
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 476
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 238
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 claims abstract description 72
- 239000007788 liquid Substances 0.000 claims description 27
- 239000007789 gas Substances 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 208000033748 Device issues Diseases 0.000 claims description 3
- 238000002309 gasification Methods 0.000 claims description 3
- 230000002159 abnormal effect Effects 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 239000006200 vaporizer Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 210000003739 neck Anatomy 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The present invention discloses a kind of nitrogen supply system and its control method, wherein nitrogen supply system includes the first source nitrogen, the second source nitrogen, production line nitrogen pipeline, valve, pressure sensor and controller.First source nitrogen provides common nitrogen；Second source nitrogen provides spare nitrogen；Production line is connected to nitrogen pipeline with the first source nitrogen；Valve is connected between the second source nitrogen and production line nitrogen pipeline；Air pressure signal of the pressure sensor to obtain production line nitrogen pipeline；Controller is electrically connected or is wirelessly connected with valve and pressure sensor, for the opening and closing according to air pressure signal control valve.Technical solution of the present invention obtains the air pressure signal of production line nitrogen pipeline by pressure sensor, controller is according to the opening and closing of air pressure signal control valve, to realize the automatic control of spare nitrogen, when there is fault in production, guarantee that nitrogen is supplied in time, ensure that the continuity of production and the quality of product.
Description
Technical field
The present invention relates to field of industrial production, in particular to a kind of nitrogen supply system and its control method.
Background technique
In electronic glass production technology, nitrogen is as molding equipment --- the protective gas of molten tin bath, it is necessary to assure steadily,
It continuously supplies, otherwise can seriously affect the quality of glass.But when using equipment of making nitrogen manufacture nitrogen, inevitably
It will appear burst devices failure or power grid stop jumping accident, although can consider stand-by equipment and backup measure in design,
Certain operating time is needed, the regular supply of nitrogen could be restored, very bad consequence can be brought to glass production in this way.Cause
This is configured with liquid nitrogen container and air temperature type vaporizer when carrying out producing line design, can will be in liquid nitrogen container when there is above-mentioned failure
Liquid nitrogen gasified by air temperature type vaporizer after to production line the supply of nitrogen.
It but in actual production, is to realize that the nitrogen in liquid nitrogen container is supplied to production line by manual operation valve.
In production development failure, manual operation valve is often not prompt enough, causes nitrogen that cannot supply in time, seriously affects glass
Quality.
Summary of the invention
The main object of the present invention is to propose a kind of nitrogen supply system, it is intended to which the automatic control for realizing spare nitrogen is occurring
When fault in production, guarantee that nitrogen is supplied in time.
To achieve the above object, nitrogen supply system proposed by the present invention, comprising:
First source nitrogen provides common nitrogen；
Second source nitrogen provides spare nitrogen；
Production line nitrogen pipeline is connected to first source nitrogen；
Valve is connected between second source nitrogen and the production line nitrogen pipeline；
Pressure sensor, to obtain the air pressure signal of the production line nitrogen pipeline；And
Controller is electrically connected or is wirelessly connected with the valve and the pressure sensor, for being believed according to the air pressure
The opening and closing of number control valve.
Preferably, second source nitrogen include liquid nitrogen container and with the tank connected gasifier of the liquid nitrogen, the gasifier
With production line nitrogen piping connection；
The valve includes the first sub- valve and the second sub- valve, and the first sub- valve is connected to the liquid nitrogen container and institute
It states between gasifier, the second sub- valve is connected between the gasifier and the production line nitrogen pipeline.
Preferably, the described first sub- valve includes valve body and the wireless receiving mould being electrically connected with the valve body
Block, the wireless signal that the wireless receiving module is issued to receive the controller.
Preferably, the described second sub- valve is automatic regulating valve.
Preferably, the pressure sensor includes that pressure responsive element and the signal connecting with the pressure responsive element turn
Block is changed the mold, the signal conversion module is converted to electric signal or nothing to the pressure signal for detecting the pressure responsive element
Line signal.
Preferably, first source nitrogen includes Nitrogen plant using air separation process.
The present invention also proposes a kind of control method of nitrogen supply system, comprising the following steps:
Obtain the air pressure signal of production line nitrogen pipeline；
By the corresponding atmospheric pressure value of the air pressure signal compared with the second air pressure setting value, when the atmospheric pressure value is greater than or equal to
When the second air pressure setting value, controls the valve and close；When the atmospheric pressure value is less than the second air pressure setting value, control
Make the valve opening.
Preferably, before the step of by the corresponding atmospheric pressure value of the air pressure signal compared with the second air pressure setting value, also
Include:
By the atmospheric pressure value compared with the first air pressure setting value, set when the atmospheric pressure value is less than or equal to first air pressure
When definite value, control warning device issues alarm signal；Wherein, the first air pressure setting value is greater than the second air pressure setting value.
Preferably, first the difference of air pressure definite value and the second air pressure setting value is set more than or equal to 0.1MPa.
Preferably, the valve includes the first sub- valve and the second sub- valve, and the first sub- valve is connected to liquid nitrogen container
Between gasifier, the second sub- valve is connected between gasifier and production line nitrogen pipeline, the control of the nitrogen supply system
Method processed includes:
By the corresponding atmospheric pressure value of the air pressure signal compared with the second air pressure setting value, when the atmospheric pressure value is greater than or equal to
When the second air pressure setting value, controls the described first sub- valve and close；When the atmospheric pressure value is set less than second air pressure
When value, the first sub- valve opening is controlled.
Technical solution of the present invention by pressure sensor obtain production line nitrogen pipeline air pressure signal, controller according to
The opening and closing of air pressure signal control valve, to realize the automatic control of spare nitrogen, when there is fault in production, guarantee nitrogen and
When supply, ensure that the continuity of production and the quality of product.
Detailed description of the invention
Fig. 1 is the connection schematic diagram of one embodiment of nitrogen supply system of the present invention；
Fig. 2 is the connection schematic diagram of another embodiment of nitrogen supply system of the present invention；
Fig. 3 is pressure sensor in one embodiment of nitrogen supply system of the present invention, controller, the second sub- valve and warning device
Connection schematic diagram；
Fig. 4 is the flow chart of one embodiment of control method of nitrogen supply system of the present invention；
Fig. 5 is the flow chart of another embodiment of control method of nitrogen supply system of the present invention；
Fig. 6 is the flow chart of the another embodiment of control method of nitrogen supply system of the present invention.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description.It should be appreciated that specific embodiment described herein is used only for explaining the present invention, it is not intended to limit the present invention.
Every other embodiment obtained by those of ordinary skill in the art without making creative efforts, belongs to this hair
The range of bright protection.
Technical solution between each embodiment can be combined with each other, but must be with those of ordinary skill in the art's energy
It is enough realize based on, will be understood that the knot of this technical solution when conflicting or cannot achieve when occurs in the combination of technical solution
Conjunction is not present, also not the present invention claims protection scope within.
The present invention proposes a kind of nitrogen supply system.
In one embodiment of this invention, as shown in figures 1 and 3, the nitrogen supply system includes the first source nitrogen 10, second
Source nitrogen 20, production line nitrogen pipeline 40, valve 30, pressure sensor 50 and controller 60.First source nitrogen 10 and institute
It states production line nitrogen pipeline 40 to be directly connected to, provides common nitrogen for production line nitrogen pipeline 40.Second source nitrogen 20 is logical
The valve 30 is crossed to be connected to the production line nitrogen pipeline 40, the valve 30 be connected to second source nitrogen 20 with it is described
For production line between nitrogen pipeline 40, second source nitrogen 20 is that the production line nitrogen pipeline 40 provides spare nitrogen.Work as institute
When stating the unlatching of valve 30, second source nitrogen 20 is connected to the production line nitrogen pipeline 40；When the valve 30 is closed,
Second source nitrogen 20 is disconnected with production line nitrogen pipeline 40.The pressure sensor 50 is installed on the production line and uses
On nitrogen pipeline 40, to obtain the air pressure signal of production line nitrogen pipeline 40；The controller 60 and the valve 30 and described
The electrical connection of pressure sensor 50 is wirelessly connected, for controlling the opening and closing of the valve 30 according to the air pressure signal.
In one embodiment of this invention, as shown in Fig. 2, first source nitrogen 10 is Nitrogen plant using air separation process 11.It can be with
Understand, in other embodiments, first source nitrogen 10 can also be liquid nitrogen container and gasifier, first source nitrogen 10
Concrete form is without limitation.
The controller 60 by the corresponding atmospheric pressure value of the air pressure signal compared with the second air pressure setting value, when the air pressure
When the corresponding atmospheric pressure value of signal is greater than or equal to the second air pressure setting value, indicate that 10 the supply of nitrogen of the first source nitrogen is normal,
The controller 60 controls the valve 30 and closes, and second source nitrogen 20 is disconnected with production line nitrogen pipeline 40, allows
Second source nitrogen 20 is in stand-by state；When the corresponding atmospheric pressure value of the air pressure signal is less than the second air pressure setting value,
Indicate that 10 the supply of nitrogen of the first source nitrogen is abnormal, the controller 0 controls the valve 30 and opens, second source nitrogen 20
It is connected to the production line nitrogen pipeline 40, the nitrogen of the second source nitrogen 20 enters production line nitrogen pipeline 40, allows second
Source nitrogen 20 is in for nitrogen state.
It is appreciated that the connection type of the controller 60 and the valve 30 and the pressure sensor 50 have it is following several
Kind: the controller 60 is all made of and is electrically connected with the valve 30 and the pressure sensor 50；Alternatively, the controller 60 with
The valve 30 is all made of wireless signal with the pressure sensor 50 and connects；Or the controller 60 is adopted with the valve 30
With electrical connection, the controller 60 is connect with the pressure sensor 60 using wireless signal；Alternatively, the controller 60 and institute
Pressure sensor 50 is stated using electrical connection, the controller 60 is connect with the valve 30 using wireless signal.
Technical solution of the present invention obtains air pressure signal of the production line with nitrogen pipeline 40, controller by pressure sensor 50
60, when there is fault in production, protect according to the opening and closing of air pressure signal control valve 30 to realize the automatic control of spare nitrogen
Card nitrogen is supplied in time, ensure that the continuity of production and the quality of product.
In one embodiment of this invention, as shown in Fig. 2, the nitrogen supply system further includes warning device 70, the control
Device 60 is before by the corresponding atmospheric pressure value of the air pressure signal compared with the second air pressure setting value, by the atmospheric pressure value and the first gas
Pressure setting value compares, and when the atmospheric pressure value is less than or equal to the first air pressure setting value, control warning device 70 issues report
Alert signal；Wherein, the first air pressure setting value is greater than the second air pressure setting value.
When the atmospheric pressure value is less than or equal to the first air pressure setting value, control warning device 70 issues alarm signal
Number, to prompt the nitrogen pressure in worker's production line nitrogen pipeline 40 to decline, there is failure for nitrogen in the first source nitrogen 10；Such as
This, for the nitrogen pressure in production line nitrogen pipeline 40 before dropping to the second setting value, worker checks the second nitrogen in time
The reason of whether source 20 can break down for nitrogen and the first source nitrogen 10 for nitrogen.
In one embodiment of this invention, as shown in Fig. 2, second source nitrogen 20 include liquid nitrogen container 21 and with the liquid
The gasifier 22 that nitrogen tank 21 connects, the gasifier 22 and production line nitrogen piping connection 40.The liquid nitrogen of liquid nitrogen container 21 passes through
After crossing gasifier 22, becomes nitrogen and enter production line nitrogen pipeline 40.The gasifier 22 can be air-heating type gasifier, can also
To be other heating devices, such as electroheat pair heating device.
The valve 30 includes the first sub- valve 31 and the second sub- valve 32, and the first sub- valve 311 is connected to described
Between liquid nitrogen container 21 and the gasifier 22, the second sub- valve 32 is connected to the gasifier 22 and the production line nitrogen
Between pipeline 40.
Specifically, controller 60 by the corresponding atmospheric pressure value of air pressure signal compared with the second air pressure setting value, when the air pressure
When value is greater than or equal to the second air pressure setting value, controls the described first sub- valve 31 and close；When the atmospheric pressure value is less than institute
When stating the second air pressure setting value, controls the described first sub- valve 31 and open.
In one embodiment of this invention, the described first sub- valve 31 is pneumatic ball valve, and the second sub- valve 32 is certainly
Dynamic pressure regulator valve.When the air pressure in production line nitrogen pipeline 40 drops to the second setting value, controller 60 controls pneumatic ball valve
It opens, supplies liquid nitrogen to air temperature type vaporizer, liquid nitrogen becomes nitrogen after gasification, into production line nitrogen pipeline 40.To
The automatic opening for realizing the first sub- valve 31 of long-range control saves the operating time compared with manual operation, ensure that nitrogen
Timely supply.Meanwhile automatic regulating valve can adjust valve opening in time according to the pressure change in pipeline, keep production line
With the air pressure constant in nitrogen pipeline 40, to realize that nitrogen is continuously supplied with stablizing.When accident releases, the first source nitrogen 10 restores
After gas supply, pressure rise in production line nitrogen pipeline 40, automatic adjustment valve opening reduces automatically, to guarantee the flat of handoff procedure
Surely.After the first source nitrogen 10 supplies normally, the first sub- valve 31 can be closed in control room, restore normal gas supply.Entire switching
In the process the nitrogen supply (NS) in pipeline be continuously, supply gas pressure be also it is basicly stable, realize the nothing of nitrogen supply (NS)
Switching is disturbed, has ensured the stability of nitrogen supply (NS).
It is appreciated that in other embodiments, the second sub- valve 32 is also possible to pneumatic ball valve, the second sub- valve
Door 32 can also be wirelessly connected or be electrically connected with controller 60, and controller 60 controls the second sub- valve according to the air pressure signal
The opening and closing of door 32.
In one embodiment of this invention, as shown in figure 3, the first sub- valve 31 include valve body 33 and with it is described
The wireless receiving module 34 that valve body 33 is electrically connected, what the wireless receiving module 34 was issued to receive the controller 60
Wireless signal.When the corresponding atmospheric pressure value of the air pressure signal is greater than or equal to the second air pressure setting value, the first nitrogen is indicated
Gas source 10 is normal for nitrogen, and the controller 60 issues out code in the form of wireless signal, and the wireless receiving module 34 connects
After receiving the out code, the valve body 33 is passed to, valve body 33 executes out code, the first sub- valve 31
It closes, second source nitrogen 20 and production line are disconnected with nitrogen pipeline 40.When the corresponding atmospheric pressure value of the air pressure signal is less than institute
When stating the second air pressure setting value, indicate that the first source nitrogen 10 is abnormal for nitrogen, the controller 60 is sent out in the form of wireless signal
Open command out after the wireless receiving module 34 receives the open command, passes to the valve body 33, valve body
33 execute open command, and the first sub- valve 31 is closed, and the liquid nitrogen of the liquid nitrogen container 21 enters gasifier 22 and gasifies, so
Enter production line nitrogen pipeline 40 by the second sub- valve 32 afterwards.
It is appreciated that in other embodiments, the first sub- valve 31 can also be not provided with wireless receiving module 34, institute
The first sub- valve 31 is stated directly to be electrically connected with the controller 60.When the corresponding atmospheric pressure value of the air pressure signal is greater than or equal to institute
When stating the second air pressure setting value, indicate that the first source nitrogen 10 is normal for nitrogen, the controller 60 issues pass as electronic signals
Instruction is closed, the first sub- valve 31 receives and execute the out code, second source nitrogen 20 and the production line nitrogen
Pipeline 40 disconnects, and the second source nitrogen 20 is allowed to be in stand-by state；When the corresponding atmospheric pressure value of the air pressure signal is less than described second
When air pressure setting value, indicate that the first source nitrogen 10 is abnormal for nitrogen, the controller 60 issues unlatching as electronic signals and refers to
It enables, the first sub- valve 31 receives and execute the open command, and the first sub- valve 31 is opened, the liquid of the liquid nitrogen container 21
Nitrogen enters gasifier 22 and gasifies, and then enters production line nitrogen pipeline 40 by the second sub- valve 32.
In one embodiment of this invention, as shown in figure 3, the pressure sensor 50 include pressure responsive element 51 and with
The signal conversion module 52 that the pressure responsive element 51 connects, the signal conversion module 52 is to first by the pressure sensitive
The pressure signal that part 51 detects is converted to electric signal or wireless signal, and by the electric signal or wireless signal transfer or transmission
To the controller 60.In one embodiment of this invention, the signal conversion module 52 is pressure transmitter.Pressure transmitter
It is the common signal conversion module of field of industrial production, is easy to reach.
The present invention also proposes a kind of control method of nitrogen supply system.
In one embodiment of this invention, as shown in figure 4, the control method of nitrogen supply system the following steps are included:
Step S10 obtains the air pressure signal of production line nitrogen pipeline；
Step S20, by the corresponding atmospheric pressure value of the air pressure signal compared with the second air pressure setting value, when the atmospheric pressure value is big
When the second air pressure setting value, controls the valve and close；It is set when the atmospheric pressure value is less than second air pressure
When definite value, the valve opening is controlled.
The controller 60 by the corresponding atmospheric pressure value of the air pressure signal compared with the second air pressure setting value, when the air pressure
When the corresponding atmospheric pressure value of signal is greater than or equal to the second air pressure setting value, indicate that 10 the supply of nitrogen of the first source nitrogen is normal,
The controller 60 controls the valve 30 and closes, and second source nitrogen 20 is disconnected with production line nitrogen pipeline 40, allows
Second source nitrogen 20 is in stand-by state；When the corresponding atmospheric pressure value of the air pressure signal is less than the second air pressure setting value,
Indicate that 10 the supply of nitrogen of the first source nitrogen is abnormal, the controller 60 controls the valve 30 and opens, second source nitrogen
20 are connected to the production line nitrogen pipeline 40, and the nitrogen of the second source nitrogen 20 enters production line nitrogen pipeline 40, allow the
Two source nitrogens 20 are in for nitrogen state.
In one embodiment of this invention, as shown in figure 5, by the corresponding atmospheric pressure value of the air pressure signal and the second air pressure
Before the step of setting value compares, further includes:
Step S21, by the atmospheric pressure value compared with the first air pressure setting value, when the atmospheric pressure value is less than or equal to described the
When one air pressure setting value, control warning device issues alarm signal；Wherein, the first air pressure setting value is set greater than the second air pressure
Value.
The controller 60 is before by the corresponding atmospheric pressure value of the air pressure signal compared with the second air pressure setting value, by institute
Atmospheric pressure value is stated compared with the first air pressure setting value, when the atmospheric pressure value is less than or equal to the first air pressure setting value, control
Warning device 70 issues alarm signal；Wherein, the first air pressure setting value is greater than the second air pressure setting value.
When the atmospheric pressure value is less than or equal to the first air pressure setting value, control warning device 70 issues alarm signal
Number, to prompt the nitrogen pressure in worker's production line nitrogen pipeline to decline, there is failure for nitrogen in the first source nitrogen 10；In this way,
For nitrogen pressure in production line nitrogen pipeline 40 before dropping to the second setting value, worker checks the second source nitrogen 20 in time
The reason of whether can breaking down for nitrogen and the first source nitrogen 10 for nitrogen.Preferably, first air pressure definite value and the second gas are set
The difference of setting value is pressed to be greater than or equal to 0.1MPa.Under such difference, worker can having time reaction, in time reply therefore
Barrier.
In one embodiment of this invention, as shown in fig. 6, the valve 30 includes the first sub- valve 31 and the second sub- valve
32, the first sub- valve 31 is connected between liquid nitrogen container 21 and gasifier 22, and the second sub- valve 32 is connected to gasifier
22 and production line between nitrogen pipeline 40, the control method of the nitrogen supply system includes:
Step S22, by the corresponding atmospheric pressure value of the air pressure signal compared with the second air pressure setting value, when the atmospheric pressure value is big
When the second air pressure setting value, controls the described first sub- valve and close；When the atmospheric pressure value is less than described second
When air pressure setting value, the first sub- valve opening is controlled.
The first sub- valve 31 is pneumatic ball valve, and the second sub- valve 32 is automatic pressure regulator.When production line nitrogen
When air pressure in pipeline 40 drops to the second setting value, controller 60 controls the unlatching of pneumatic ball valve, supplies to air temperature type vaporizer
Liquid nitrogen is answered, liquid nitrogen becomes nitrogen after gasification, into production line nitrogen pipeline.To realize the first sub- valve of long-range control
31 automatic opening saves the operating time compared with manual operation, ensure that the timely supply of nitrogen.Meanwhile after gasifier
Automatic regulating valve, can adjust valve opening in time according to the pressure change in pipeline, keep production line in nitrogen pipeline 40
Air pressure constant, thus realize nitrogen continuously with stablize supply.After accident releases, the first source nitrogen 10 restores gas supply, production
Pressure rise in line nitrogen pipeline 40, automatic adjustment valve opening reduces automatically, to guarantee the steady of handoff procedure.When the first nitrogen
After gas source 10 supplies normally, the first sub- valve 31 can be closed in control room, restore normal gas supply.In entire handoff procedure in pipeline
Nitrogen supply (NS) be continuously, supply gas pressure be also it is basicly stable, realize the no-harass switch of nitrogen supply (NS), ensure
The stability of nitrogen supply (NS).
It is appreciated that in other embodiments, the second sub- valve 32 is also possible to pneumatic ball valve, the second sub- valve
Door 32 can also be wirelessly connected or be electrically connected with controller 60, and controller 60 controls the second sub- valve according to the air pressure signal
The opening and closing of door 32.
The above description is only a preferred embodiment of the present invention, is not intended to limit its scope of the patents, all to utilize the present invention
Equivalent structure or equivalent flow shift made by specification and accompanying drawing content is directly or indirectly used in other relevant technology necks
Domain is included within the scope of the present invention.
Claims (10)
1. a kind of nitrogen supply system characterized by comprising
First source nitrogen provides common nitrogen；
Second source nitrogen provides spare nitrogen；
Production line nitrogen pipeline is connected to first source nitrogen；
Valve is connected between second source nitrogen and the production line nitrogen pipeline；
Pressure sensor, to obtain the air pressure signal of the production line nitrogen pipeline；And
Controller is electrically connected or is wirelessly connected with the valve and the pressure sensor, for according to the air pressure signal control
Make the opening and closing of the valve.
2. nitrogen supply system as described in claim 1, which is characterized in that second source nitrogen include liquid nitrogen container and with the liquid
The tank connected gasifier of nitrogen, the gasifier and production line nitrogen piping connection；
The valve includes the first sub- valve and the second sub- valve, and the first sub- valve is connected to the liquid nitrogen container and the gas
Change between device, the second sub- valve is connected between the gasifier and the production line nitrogen pipeline.
3. nitrogen supply system as claimed in claim 2, which is characterized in that the first sub- valve include valve body and with it is described
The wireless receiving module of valve body electrical connection, the wireless communication that the wireless receiving module is issued to receive the controller
Number.
4. nitrogen supply system as claimed in claim 2, which is characterized in that the second sub- valve is automatic regulating valve.
5. nitrogen supply system as described in claim 1, which is characterized in that the pressure sensor include pressure responsive element and with
The signal conversion module of the pressure responsive element connection, the signal conversion module is to detect the pressure responsive element
To pressure signal be converted to electric signal or wireless signal.
6. such as nitrogen supply system described in any one of claim 1 to 5, which is characterized in that first source nitrogen includes space division system
Nitrogen device.
7. a kind of control method of nitrogen supply system, which comprises the following steps:
Obtain the air pressure signal of production line nitrogen pipeline；
By the corresponding atmospheric pressure value of the air pressure signal compared with the second air pressure setting value, when the atmospheric pressure value is more than or equal to described
When the second air pressure setting value, controls the valve and close；When the atmospheric pressure value is less than the second air pressure setting value, institute is controlled
State valve opening.
8. the control method of nitrogen supply system as claimed in claim 7, which is characterized in that by the corresponding gas of the air pressure signal
Before the step of pressure value is compared with the second air pressure setting value, further includes:
By the atmospheric pressure value compared with the first air pressure setting value, when the atmospheric pressure value is less than or equal to the first air pressure setting value
When, control warning device issues alarm signal；Wherein, the first air pressure setting value is greater than the second air pressure setting value.
9. the control method of nitrogen supply system as claimed in claim 8, which is characterized in that first sets air pressure definite value and the second air pressure
The difference of setting value is greater than or equal to 0.1MPa.
10. the control method of nitrogen supply system as claimed in claim 7, which is characterized in that the valve includes the first sub- valve
With the second sub- valve, the first sub- valve is connected between liquid nitrogen container and gasifier, and the second sub- valve is connected to gasification
With between nitrogen pipeline, the control method of the nitrogen supply system includes: for device and production line
By the corresponding atmospheric pressure value of the air pressure signal compared with the second air pressure setting value, when the atmospheric pressure value is more than or equal to described
When the second air pressure setting value, controls the described first sub- valve and close；When the atmospheric pressure value is less than the second air pressure setting value,
Control the described first sub- valve opening.
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| CN201811462088.3A CN109340571A (en) | 2018-11-30 | 2018-11-30 | Nitrogen supply system and its control method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110324031A (en) * | 2019-07-05 | 2019-10-11 | 中国科学院空间应用工程与技术中心 | A kind of control circuit of nitrogen supply (NS) system and solenoid valve |
| CN111059466A (en) * | 2019-11-29 | 2020-04-24 | 青岛歌尔智能传感器有限公司 | Nitrogen gas supply device, plasma cleaning system and nitrogen gas supply method |
| CN112856218A (en) * | 2020-12-25 | 2021-05-28 | 北京动力机械研究所 | Automatic flow control and protection method based on liquid oxygen flow regulation |
| CN116753465A (en) * | 2023-08-07 | 2023-09-15 | 广州广钢气体能源股份有限公司 | System and method for sharing instrument gas of multiple sets of nitrogen production devices |
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| CN112856218A (en) * | 2020-12-25 | 2021-05-28 | 北京动力机械研究所 | Automatic flow control and protection method based on liquid oxygen flow regulation |
| CN116753465A (en) * | 2023-08-07 | 2023-09-15 | 广州广钢气体能源股份有限公司 | System and method for sharing instrument gas of multiple sets of nitrogen production devices |
| CN116753465B (en) * | 2023-08-07 | 2024-03-19 | 广州广钢气体能源股份有限公司 | System and method for sharing instrument gas of multiple sets of nitrogen production devices |
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Effective date of registration: 20210609 Address after: 412200 Dongfu Industrial Park, Liling Economic Development Zone, Zhuzhou City, Hunan Province Applicant after: LILING QIBIN ELECTRONIC GLASS Co.,Ltd. Address before: 412200 Dongfu Industrial Park, Liling Economic Development Zone, Zhuzhou City, Hunan Province Applicant before: LILING QIBIN ELECTRONIC GLASS Co.,Ltd. Applicant before: ZHUZHOU LILING KIBING GLASS Co.,Ltd. Applicant before: SHENZHEN NEW KIBING TECHNOLOGY Co.,Ltd. |
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Address after: 412200 Dongfu Industrial Park, Liling Economic Development Zone, Zhuzhou City, Hunan Province Applicant after: Hunan Qibin Electronic Glass Co.,Ltd. Address before: 412200 Dongfu Industrial Park, Liling Economic Development Zone, Zhuzhou City, Hunan Province Applicant before: LILING QIBIN ELECTRONIC GLASS Co.,Ltd. |