CN105927858B - A kind of anti-blasting method for the glass partition for being placed on vacuum environment - Google Patents
A kind of anti-blasting method for the glass partition for being placed on vacuum environment Download PDFInfo
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- CN105927858B CN105927858B CN201610306547.3A CN201610306547A CN105927858B CN 105927858 B CN105927858 B CN 105927858B CN 201610306547 A CN201610306547 A CN 201610306547A CN 105927858 B CN105927858 B CN 105927858B
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/12—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/03—Control means
- F17C2250/032—Control means using computers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/04—Indicating or measuring of parameters as input values
- F17C2250/0404—Parameters indicated or measured
- F17C2250/043—Pressure
- F17C2250/0434—Pressure difference
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Examining Or Testing Airtightness (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
The invention provides a kind of anti-blasting method for the glass partition for being placed on vacuum environment.The characteristics of this method is using vacuum gauge, vacuum switch, high-vacuum electromagnetic valve, safety blasting piece, with reference to PLC control system software and hardware, various potential potential safety hazards are fully taken into account, in pumping flow, deflation flow, pressurize workflow, in whole vacuum 5 × 102Pa~1×105 Implement anti-explosion in the range of Pa.Level Four real-time guard has particularly been carried out in pressurize flow; the first order is sound and light alarm protection; the second level is that PLC program automatically controls valve opening protection, and the third level is the control valve opening pressure release protection of vacuum switch electrical hardware, and the fourth stage then realizes security protection by mechanical rupture disk pressure release completely.The anti-blasting method of the glass partition for being placed on vacuum environment of the present invention has the advantages of security is good, response is fast, reliability is high, and serving good safeguard protection to the glass partition in complicated and special vacuum environment acts on.
Description
Technical field
The invention belongs to pressure vessel explosion-proof relief field, and in particular to a kind of glass partition for being placed on vacuum environment
Anti- blasting method.
Background technology
At present, it is mainly safety blasting piece and relief valve that the method for superpressure or excessive vacuum is prevented in pressure vessel：For
Safety blasting piece and relief valve, there are the national standard of correlation and some patents.It is well known that safety blasting piece mainly by
The pressure-relieving device of the composition such as rupture disk and clamper, when rupture disk pressure at both sides difference reaches pre-set value, rupture disk is at once
Action（Be broken or come off）, and fluid media (medium) of releasing belongs to disposable pressure releasing method, irrecoverable after rupture disk rupture and again
Come into operation.In addition, relief valve, also known as safety valve, safe pressure can ought be reached according to the operating pressure automatic open close of system
It can be automatically turned on during the upper limit of power, pressure be discharged a part, when pressure drops to below safe pressure, relief valve is automatic
Close, so relief valve belongs to reusable type safety relief method.
Currently, in large-scale device of high power laser, there is one piece of vacuum glass dividing plate during heavy caliber beam Propagation,
Size is 400mm（It is long）×400mm（It is wide）×10mm（It is thick）, it is placed between two vacuum tanks, because large-caliber laser will
By the glass, so stainless steel plate or aluminium sheet can not be used, it is necessary to using glass plate, glass as transmission optical component,
It must be able to through high energy, high density, bigbore light beam, and beam energy loss and the influence of light path directive property will be tried one's best
Small, this requires that partition glass is as far as possible thin, actual tests selection thickness be 10cm quartz glass as vacuum insulation panel, but
It is that, as the glass partition of isolated vacuum, both sides safe pressure differential must be controlled within 10000Pa（Glass partition both sides are specified
Operating pressure is 1 × 10 respectively-4Pa（High vacuum）And 1000Pa（Low vacuum））, because when dividing plate both sides pressure difference is more than
During 10000Pa, glass partition just has broken danger, and other the valuable optical elements damaged in vacuum tank, or even damage are true
Sky obtains equipment（Vacuum pump set）.So in order to which the progress to glass partition in this complicated vacuum environment is effectively protected, it is necessary to adopt
With the anti-explosion pressure releasing method of a set of special complete function, to reach this harsh safety requirements.
At present, home and overseas there is no the anti-explosion pressure releasing method of such specific use, generally use installation safety blasting
The method of piece and relief valve protect, and large-scale device of high power laser to security, reliability, air-tightness, rapidity requirement compared with
Height, and to have certain automatic recovery ability.Rupture disk belongs to medical disposable material device, can not recover after explosion, and function is single,
It can not be used alone to complete the security protection in this special vacuum system, the composition that can only be protected as mechanical pressure release level security
Device.The air-tightness of relief valve is low, all can not be that the environment of vacuum carries out reliable vacuum insulation and sealing to both sides, especially two
Under small pressure difference as the 1000Pa of side, fast quick-opening valve pressure release can not be more realized（For relief valve, pressure difference is bigger, and pressure release is faster）.
Both the above safety protecting method is unsatisfactory for requiring.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of anti-blasting method for the glass partition for being placed on vacuum environment.
The anti-demolition set of the glass partition being placed in vacuum environment of the present invention, including high vacuum jar, low vacuum
Container, high vacuum pipe, Roughing line, high vacuum are regulated, low vacuum is regulated, vacuum switch I, vacuum switch II, high vacuum
Magnetic valve I, high-vacuum electromagnetic valve II, safety blasting piece I, safety blasting piece II, electric control circuit, PLC（Programmable
Logic Controller programmable logic controller (PLC)s, abbreviation PLC）Control system, vacuum-control(led) system, intake valve.
The anti-blasting method of the glass partition being placed in vacuum environment of the present invention is as follows：
Glass partition is placed between described high vacuum jar and low vacuum container；Described high vacuum pipe and high vacuum
Reservoir, high vacuum is installed on high vacuum pipe and regulated and vacuum switch I；Described Roughing line and low vacuum container
Connect, there is installation low vacuum to regulate and vacuum switch II on Roughing line；Described high vacuum pipe and Roughing line it
Between high-vacuum electromagnetic valve I, high-vacuum electromagnetic valve II, safety blasting piece I and safety blasting piece II in parallel；Intake valve is placed on low true
On empty container；Vacuum-control(led) system is connected by electric control circuit with PLC control system.
Described high vacuum regulates the vacuum readings regulated with low vacuum and transmits to PLC to control by electric control circuit
System, the control command of PLC control system transmit paramount vacuum solenoid I and high-vacuum electromagnetic valve II by electric control circuit.
Described vacuum switch I or the set value calculation high-vacuum electromagnetic valve I or high-vacuum electromagnetic valve II of vacuum switch II
Open or close.
Pressure difference control safety blasting piece I and safety blasting piece II between described high vacuum jar and low vacuum container
Explosion, safety blasting piece I is opposite with the blasting direction of safety blasting piece II.
Described high vacuum jar is evacuated in flow with low vacuum container from atmospheric pressure into connecting for vacuum, PLC controls
System control high-vacuum electromagnetic valve I and high-vacuum electromagnetic valve II processed stay open connected state；And high vacuum regulate with it is low true
Sky is regulated compares both pressure differences in real time.
There is hardware contact safety interlocking signal between described PLC control system and the vacuum-control(led) system of pumping, work as PLC
Control system does not send license pumping contact signal, and company vacuumizes control system and will be unable to start air extracting function.
There is the software communication chain letter by Ethernet between described PLC control system and the vacuum-control(led) system of pumping
Number, when PLC control system does not send license pumping control signal, company vacuumizes control system and will be unable to start air extracting function.
Described high vacuum jar is evacuated in flow with low vacuum container from atmospheric pressure into connecting for high low vacuum,
As low vacuum vacuum degree of vessel≤1000Pa, PLC control system control high-vacuum electromagnetic valve I and high-vacuum electromagnetic valve II close
Close, low vacuum container enters pressurize flow, and vacuum suction control system only carries out fine pumping to high vacuum jar, until 1
×10-4Pa（High vacuum）.Low vacuum container enters packing state, i.e., after working vacuum degree, PLC control system will monitor very in real time
Reciprocal of duty cycle changes, and employs the level Four method for security protection of complete function.
Described high vacuum jar and low vacuum container connect deflation flow enter atmospheric pressure from vacuum state,
PLC control system control high-vacuum electromagnetic valve I and high-vacuum electromagnetic valve II stay open connected state；And high vacuum regulate and
Low vacuum is regulated compares both pressure differences in real time.
Described PLC control system has an emergent management function, field control cabinet and upper computer software be equipped with promptly by
Button, high-vacuum electromagnetic valve I and high-vacuum electromagnetic valve II are opened when occurring for emergency at once, system is in safe shape
State.
Pressurize flow comprises the following steps：
A. device power and self-test；
B. the first order is protected：It is to regulate PLC control system with high vacuum by electric control circuit to regulate with low vacuum
Link together, when the reading of any one vacuum gauge exceedes setting value, PLC automatic control program can send " gas leakage
Alarm " is ordered sends sound and light alarm to buzzer, realizes that PLC program software automatically controls sound and light alarm protection；After troubleshooting,
PLC automatic control program can send the order of leakage alarm reset, and stop alarm, system return to pressurize flow；
C. the second level is protected：It is to regulate PLC control system and forevacuum ga(u)ge by electric control circuit and high vacuum
Pipe, and two high-vacuum electromagnetic valves I and high-vacuum electromagnetic valve II in parallel link together；When the leakage alarm of the first order does not have
It is effectively addressed, when the reading of vacuum gauge continuously rises to the threshold value of automatic valve opening, PLC program software is according to vacuum gauge
The reading of pipe automatically controls high-vacuum electromagnetic valve I and the valve opening pressure release of high-vacuum electromagnetic valve II, realizes that PLC softwares automatically control valve opening
Decompression protection；When the pressure between glass partition both sides reduces until after balance rapidly, PLC automatic control program can be sent
The order that valve opening pressure release resets, high-vacuum electromagnetic valve and automatic closing, system return to pressurize flow；
D. the third level is protected：It is that vacuum switch I or vacuum switch II are passed through into electric control circuit and high-vacuum electromagnetic valve
I or high-vacuum electromagnetic valve II be connected；When the first order and second level shielding failure, the pressure of glass partition both sides continues to increase, reached
During to the setting value of vacuum switch I or vacuum switch II, vacuum switch I or vacuum switch II send contact signal control high vacuum
Magnetic valve I or high-vacuum electromagnetic valve II are opened, and realize electrical hardware valve opening decompression protection；Pressure between glass partition both sides
Rapid to reduce until after balance, vacuum switch I or the output contact control signal of vacuum switch II release, high-vacuum electromagnetic valve and from
Dynamic to be re-closing off, system returns to pressurize flow, realizes electrical hardware valve opening decompression protection；
E. the fourth stage is protected：By safety blasting piece I and safety blasting in parallel between high vacuum jar and low vacuum container
Piece II forms, and blasting direction is opposite；Current three-level protective fails, and the pressure of glass partition both sides continues to increase, and reaches safety
During the setting explosion threshold value of rupture disk, rupture disk automatic-explosion pressure release, mechanical level hardware protection is realized；It is totally independent of electric-controlled
System processed, safety blasting piece I and the automatic-explosion pressure release of safety blasting piece II, between glass partition both sides, i.e., height empty container it
Between pressure reduce rapidly until balance, treats Chu Liwan failures, change rupture disk, system recovers normal pressurize flow.
Wherein, the level Four method for security protection in pressurize flow is to be based on following mentality of designing：
First order protection is regulated and low vacuum gage connection by electric control circuit and high vacuum by PLC control system
Together, PLC control system carries out real-time data acquisition to vacuum gauge, when the reading of any one vacuum gauge exceedes setting
During value, PLC automatic control program, which can send " leakage alarm ", orders and sends sound and light alarm to buzzer, realizes that the first order is protected
Shield.
First order protection is to utilize the change progress condition judgment of itself pressure data of single vacuum gauge, rather than utilization
The pressure difference of two vacuum gauges is judged, realizes first order sound and light alarm.
Second level protection is to be regulated to regulate with low vacuum with high vacuum by electric control circuit by PLC control system, with
And two high-vacuum electromagnetic valves I and high-vacuum electromagnetic valve II in parallel link together.When " leakage alarm " of the first order does not have
It is effectively addressed, when the reading of vacuum gauge continuously rises to the threshold value of " automatic valve opening ", PLC program software is according to vacuum gauge
The reading of pipe automatically controls high-vacuum electromagnetic valve I and the valve opening pressure release of high-vacuum electromagnetic valve II, realizes that PLC softwares automatically control valve opening
Decompression protection.
Equally, second level protection is to carry out condition judgment using the change of single vacuum gauge pressure itself data, without
It is to be judged using the pressure difference of two vacuum gauges, realizes second level valve opening decompression protection.
Third level protection is by electric control circuit and high-vacuum electromagnetic valve I by vacuum switch I or vacuum switch II
Or high-vacuum electromagnetic valve II is connected.When the first order and second level shielding failure, the pressure of glass partition both sides continues to increase, reached
During the setting value of vacuum switch I or vacuum switch II, vacuum switch I or vacuum switch II send contact signal control high vacuum electricity
Magnet valve I or high-vacuum electromagnetic valve II are opened, and realize electrical hardware valve opening decompression protection；
Fourth stage protection is by safety blasting piece I and safety blasting piece in parallel between high vacuum jar and low vacuum container
II composition, blasting direction are opposite.Current three-level protective fails, and the pressure of glass partition both sides continues to increase, and it is quick-fried to reach safety
During the setting explosion threshold value of fragmentation, rupture disk automatic-explosion pressure release, mechanical level hardware protection is realized.
The present invention the glass partition being placed in vacuum environment anti-blasting method using vacuum gauge, vacuum switch,
The characteristics of high-vacuum electromagnetic valve, safety blasting piece, with reference to PLC control system software and hardware, fully take into account various potential safety
Hidden danger, in all workflows：Flow, deflation flow, pressurize flow are evacuated, and in whole vacuum 5 × 102Pa ~1
×105 In the range of Pa, a mutual supplement with each other's advantages, and the anti-blasting method of complete function are cleverly constituted.The anti-demolition set
With the advantages of security is good, response is fast, reliability is high, the glass partition in complicated and special vacuum environment is played
Good safeguard protection effect.
Brief description of the drawings
Fig. 1 is the structure drawing of device of the anti-blasting method of the glass partition for being placed on vacuum environment of the present invention；
Fig. 2 is the pumping flow chart of the present invention；
Fig. 3 is the deflation flow chart of the present invention；
Fig. 4 is the pressurize flow chart of the present invention.
In figure, 1. glass partitions, 2. high vacuum jars, 3. low vacuum containers, 4. high vacuum pipes, 5. Roughing lines,
6. high vacuum is regulated, 7. low vacuum are regulated, 8. vacuum switches I, 9. vacuum switches II, 10. high-vacuum electromagnetic valves I, 11. Gao Zhen
Empty magnetic valve II, 12. safety blasting pieces I, 13. safety blasting pieces II, 14. electric control circuits, 15.PLC control systems, 16.
Vacuum-control(led) system, 17. intake valves.
Embodiment
Describe the present invention in detail with reference to the accompanying drawings and examples.
Following examples are merely to illustrate the present invention, and not limitation of the present invention.Relevant person skilled in the art exists
It in the case of not departing from the spirit and scope of the present invention, can also make a variety of changes, replace and modification, therefore equal technology
Scheme falls within scope of the invention.
As shown in Fig. 1 structure drawing of device, anti-demolition set includes high vacuum jar 2, low vacuum container 3, high-vacuum tube
Road 4, Roughing line 5, high vacuum regulate 6, low vacuum and regulate 7, vacuum switch I 8, vacuum switch II 9, high-vacuum electromagnetic valve I
10th, high-vacuum electromagnetic valve II 11, safety blasting piece I 12, safety blasting piece II 13, electric control circuit 14, PLC control system
15th, vacuum-control(led) system 16, intake valve 17.
Glass partition 1 is placed between described high vacuum jar 2 and low vacuum container 3；Described high vacuum pipe 4 and height
Vacuum tank 2 is connected, and high vacuum is provided with high vacuum pipe 4 and regulates 6 and vacuum switch I 8；Described Roughing line 5 with
Low vacuum container 3 connects, and has installation low vacuum to regulate 7 and vacuum switch II 9 on Roughing line 5；Described high vacuum pipe 4
High-vacuum electromagnetic valve I 10, high-vacuum electromagnetic valve II 11, safety blasting piece I 12 and safety blasting in parallel between Roughing line 5
Piece II 13；Intake valve 17 is placed on low vacuum container 3；Vacuum-control(led) system 16 is controlled by electric control circuit 14 and PLC
System 15 is connected.
Described high vacuum regulate 6 and low vacuum regulate 7 vacuum readings and transmitted by electric control circuit 14 to PLC and controlled
System 15 processed, the control command of PLC control system 15 transmit paramount vacuum solenoid I 10 and Gao Zhen by electric control circuit 14
Empty magnetic valve II 11.
Described vacuum switch I 8 or the set value calculation high-vacuum electromagnetic valve I 10 or high-vacuum electromagnetic of vacuum switch II 9
Valve II 11 opens or closes.
Pressure difference control safety blasting piece I 12 and safety blasting between described high vacuum jar 2 and low vacuum container 3
The explosion of piece II 13, safety blasting piece I 12, the blasting direction of safety blasting piece II 13 are opposite.
Described high vacuum jar 2 and low vacuum container 3 enters in the pumping flow of vacuum from atmospheric pressure, PLC controls
System 15 by electric control circuit 14 read high vacuum regulate 6 and low vacuum regulate 7 vacuum readings, in real time compare pressure difference read
Number, control high-vacuum electromagnetic valve I 10 or high-vacuum electromagnetic valve II 11 stay open connected state or closed mode.
There is hardware contact safety interlocking signal between described PLC control system 15 and the vacuum-control(led) system 16 of pumping,
When PLC control system 15 does not send license pumping contact signal, vacuum-control(led) system 16 will be unable to start air extracting function.
Have between described PLC control system 15 and the vacuum-control(led) system 16 of pumping and connected by the software communication of Ethernet
Lock signal, when PLC control system 15 does not send license pumping software control command, the vacuum-control(led) system 16 that company takes out will be unable to
Start air extracting function.
Described high vacuum jar 2 and low vacuum container 3 enters in the pumping flow of high low vacuum from atmospheric pressure,
PLC control system 15 controls high-vacuum electromagnetic valve I 10 or high-vacuum electromagnetic valve II 11 to remain on, when low vacuum container 3
During vacuum≤1000Pa, PLC control system 15 controls high-vacuum electromagnetic valve I 10 or high-vacuum electromagnetic valve II 11 to close, low true
After empty container 3 enters pressurize flow, vacuum suction control system only carries out fine pumping to high vacuum jar 2, until 1 ×
10-4Pa high vacuum.Low vacuum container 3 enters packing state, i.e., after working vacuum degree, PLC control system 15 will monitor very in real time
Reciprocal of duty cycle changes, and employs the level Four method for security protection of complete function.
Described high vacuum jar 2 and low vacuum container 3 enters in the deflation flow of atmospheric pressure from vacuum state,
PLC control system 15 controls high-vacuum electromagnetic valve I 10 and high-vacuum electromagnetic valve II 11 to stay open connected state；And high vacuum
Regulate 6 and low vacuum regulate in real time compare delta pressure readings；When monitoring that two readings regulated reach atmospheric pressure simultaneously, from
It is dynamic to close intake valve, stop deflation flow.
Described PLC control system 15 has emergent management function, and field control cabinet and upper computer software are equipped with promptly
Button, when occurring for emergency, immediately close off intake valve 17 and open high-vacuum electromagnetic valve I 10 and high-vacuum electromagnetic valve II
11, make system in a safe condition.
Each workflow and anti-explosion method and step is discussed in detail with reference to Fig. 1 ~ Fig. 4：
As shown in Fig. 2 pumping flow, start system boot self-test by rear, the intake valve success of closing intake valve 17, no
Success is just alarmed, and is then regulated 7 by low vacuum and is judged whether the vacuum P2 of low vacuum container 3 is more than 1000Pa, if small
In 1000Pa, flow is directly entered pressurize flow；If greater than 1000Pa, PLC control system 15 opens high-vacuum electromagnetic valve I 10
After high-vacuum electromagnetic valve II 11, license pumping safety interlocking signal is sent by hardware contact, while pass through the soft of Ethernet
Part communication send license pumping safety interlocking control command to, vacuum-control(led) system 16 starts to vacuumize high vacuum jar 2, and
By high-vacuum electromagnetic valve I 10 and high-vacuum electromagnetic valve II 11 after being connected to low vacuum container 3 together with vacuumize.It had been evacuated
Cheng Zhong, compares the vacuum P1 and P2 of high vacuum jar 2 and low vacuum container 3 in real time, and both differences must be consistently less than
5000Pa, otherwise, PLC control system 15 will send overpressure alarm.Operations staff will make emergency processing immediately, that is, stop vacuum
The pumping flow of control system 16, and check cause of accident.If pumping flow it is normal, when the vacuum P2 of low vacuum container 3≤
During 1000Pa, PLC control system 15 controls high-vacuum electromagnetic valve I 10 or high-vacuum electromagnetic valve II 11 to close, and low vacuum container 3 enters
After entering pressurize flow, vacuum suction control system only carries out fine pumping to high vacuum jar 2, until 1 × 10-4Pa Gao Zhen
It is empty.Low vacuum container 3 enters packing state, i.e., after working vacuum degree, PLC control system 15 will monitor vacuum change in real time,
Employ the level Four method for security protection of complete function；
Below, using the size of rectangle as 400mm（It is long）×400mm（It is wide）×10mm（It is thick）Glass partition 1 exemplified by be subject to
Explanation.The theoretical burst pressure of the glass partition 1, i.e. ultimate pressure are Pj=50000Pa, and safety coefficient takes：γ=（Limiting pressure
Pj/ allowable pressures Px）>=5, allowable pressure is Px≤limiting pressure Pj/5=10000Pa.Therefore, advised from compound high vacuum
Pipe 6, will two kinds of vacuum meters be integrated in a small-sized unit, pressure measurement range be 5 × 10-8 Pa ~1×105 Pa；It is low
The pressure measurement range of vacuum gauge 7 is 5 × 10-2 Pa ~1.5×105 Pa；The setting of vacuum switch I 8 or vacuum switch II 9
Value A is 5000Pa, and precision is ± 100 Pa；High-vacuum electromagnetic valve I 10 and high-vacuum electromagnetic valve II 11 are built-in stainless steel ripple
The angle valve of tube seal structure, leak rate are 5 × 10-10 Pa·m3/ s, evolution to close direction pressure difference≤1.3 × 105 Pa, work
Make minimum pressure as 1 × 10-6 Pa.The burst pressure setting value B of safety blasting piece I 12 and safety blasting piece II 13 is
10000Pa（B=2A=allowable pressure is Px）, precision is ± 5%.
The anti-blasting method of the glass partition being placed in vacuum environment of the present invention, in prolonged pressurize flow,
The level Four protection based on PLC softwares, electrical hardware and purely mechanic combination is carried out to glass partition 1.
As shown in Fig. 4 pressurize flow, device power self-test is immediately entered level Four protection, illustrated step by step below by rear：
The first order is protected：It is that PLC control system 15 is regulated into 6 and forevacuum ga(u)ge by electric control circuit 14 and high vacuum
Pipe 7 links together, and realizes that PLC program software automatically controls sound and light alarm protection.Specific work process is：High vacuum regulates 6
Monitor the vacuum P1 of high vacuum jar 2 in real time by high vacuum pipe 4, low vacuum is regulated 7 and supervised in real time by Roughing line 5
The vacuum P2 of low vacuum container 3 is surveyed, the vacuum readings of two vacuum gauges are transferred to PLC controls by electric control circuit 14
System 15, PLC control softwares are monitored in real time automatically, any one when wherein there is any one container micro- principal fault occur
When the reading of individual vacuum gauge exceedes setting value, i.e. P1 >=1500Pa or P2 >=1500Pa, PLC automatic control program meeting
Send " leakage alarm " and order and send sound and light alarm to buzzer, i.e., entered using the change of single vacuum gauge pressure itself data
Row condition judgment, rather than judged using the pressure difference of two vacuum gauges, realize first order sound and light alarm；When two vacuum
The reading regulated returns to P1≤1500Pa and P2≤1500P, and PLC automatic control program can be sent " leakage alarm reset "
Order, stop alarm, system return to pressurize flow, and first order acousto-optic can control the pressure difference of the both sides of glass partition 10
Between ~ 1500Pa.
First order protection is to carry out condition judgment using the change of single vacuum gauge pressure itself data, rather than is utilized
The pressure difference of two vacuum gauges is judged, realizes first order sound and light alarm；
Protect the second level：It is that PLC control system 15 is regulated into 6 and forevacuum ga(u)ge by electric control circuit 14 and high vacuum
Pipe 7, and two high-vacuum electromagnetic valves I 10 and high-vacuum electromagnetic valve II 11 in parallel link together, and realize PLC program software
According to high vacuum regulate 6 and low vacuum regulate 7 reading and automatically control high-vacuum electromagnetic valve 10 and high-vacuum electromagnetic valve 11, realize
PLC softwares automatically control valve opening decompression protection.Specific work process is：High vacuum is regulated 6 and monitored in real time by high vacuum pipe 4
The vacuum P1 of high vacuum jar 2, low vacuum regulate 7 vacuums for monitoring low vacuum container 3 in real time by Roughing line 5
P2, high vacuum regulate 6 and low vacuum regulate 7 vacuum readings and PLC control system 15 be transferred to by electric control circuit 14,
PLC control softwares are monitored in real time automatically, when " leakage alarm " of the first order does not obtain timely and effective processing, high vacuum rule
The reading that pipe 6 and low vacuum regulate 7 continues to rise, when any one high vacuum regulate 6 or low vacuum regulate 7 reading exceed set
During definite value, i.e. P1 >=3000Pa or P2 >=3000Pa, PLC automatic control program can send " valve opening pressure release " order, high vacuum
Magnetic valve I 10 and the automatic forced valve opening pressure release of high-vacuum electromagnetic valve II 11, the pressure between the both sides of glass partition 1 reduce rapidly straight
To balance, i.e. P1≤3000Pa and P2≤3000Pa, PLC automatic control program can send " valve opening pressure release reset " order, high
Vacuum solenoid I 10 and high-vacuum electromagnetic valve II 11 are closed automatically, and system returns to pressurize flow.Equally, also with single
The change of vacuum gauge pressure itself data carries out condition judgment, rather than is judged using the pressure difference of two vacuum gauges,
Second level valve opening decompression protection is realized, the pressure difference of the both sides of glass partition 1 can be controlled between 1500 ~ 3000Pa.
The third level is protected：It is that electric control circuit 14 and high vacuum electricity are passed through by vacuum switch I 8 or vacuum switch II 9
Magnet valve I 10 or high-vacuum electromagnetic valve II 11 are connected.When occur PLC software faults crash or not on establish machine, the first order and second by cable
Level PLC control software shielding failures, high-vacuum electromagnetic valve I 10 or high-vacuum electromagnetic valve II 11 fail to open pressure release, glass in time
The pressure of the both sides of dividing plate 1 continues to increase, and when the setting value A for reaching vacuum switch I 8 or vacuum switch II 9 is 5000Pa, does not pass through
PLC softwares, vacuum switch I 8 or the output contact control signal of vacuum switch II 9, directly trigger control relay and open high vacuum
Magnetic valve I 10 or the decompression protection of high-vacuum electromagnetic valve II 11, the pressure between the both sides of glass partition 1 reduces rapidly until balance,
That is P1≤5000Pa and P2≤5000Pa, vacuum switch I 8 or the output contact control signal of vacuum switch II 9 release, high vacuum electricity
Magnet valve 10 and 11 is re-closing off automatically, and system returns to pressurize flow, realizes electrical hardware valve opening decompression protection；The third level is protected
The pressure difference of the both sides of glass partition 1 can be controlled between 3000 ~ 5000Pa.
The fourth stage is protected：It is by safety blasting piece I 12 in parallel between high vacuum jar 2 and low vacuum container 3 and safety
Rupture disk II 13 forms, and blasting direction is opposite.When fruit whole electrical system such as occurs having a power failure the special circumstances, magnetic valve can not be played
UNICOM's decompression function, when preceding three-level protective fails, the pressure of the both sides of glass partition 1 continues to increase, and reaches safety blasting piece I 12
Explosion threshold value B is set with safety blasting piece II 13 as 10000Pa（B=2A=allowable pressure is Px）When, it is totally independent of electrically
System, safety blasting piece I 12 and the automatic-explosion pressure release of safety blasting piece II 13, between the both sides of glass partition 1, i.e. height empty container
Between pressure reduce rapidly until balance, treats Chu Liwan failures, change rupture disk, system recovers normal pressurize flow.The fourth stage
Purely mechanic level hardware protection, the pressure difference of the both sides of glass partition 1 can be controlled between 5000 ~ 10000Pa, the fourth stage is complete
By rupture disk mechanical pressure deform it is independent realize safety blasting, do not influenceed by any of electric control system, it is whole to make up
Electric control system such as occurs having a power failure the special circumstances, and three-level passes through electrical control software and hardware and carries out safeguard protection before can not playing
Hidden danger.
As shown in Fig. 3 deflation flow, start system boot self-test by rear, PLC control system 15 opens high vacuum electricity
Magnet valve I 10 and high-vacuum electromagnetic valve II 11, connect height empty container；If feedback do not open, system will alarm, if feedback into
Work(is opened, and next step opens intake valve, if intake valve feedback is not opened, system will alarm, and operations staff will carry out event immediately
Barrier processing.Similar with pumping flow during normal air inlet, PLC control system 15 will compare high vacuum jar 2 in real time and low vacuum is held
The vacuum P1 and P2 of device 3, both differences must be consistently less than 5000Pa, and otherwise, PLC control system 15 will send superpressure report
It is alert.Operations staff will make emergency processing immediately, that is, close intake valve, stop deflation flow, and check cause of accident.If put
Air-flow journey is normal, when height vacuum tank vacuum P1 and P2 >=1 × 105 During Pa, PLC control system 15 controls intake valve certainly
Dynamic to close, deflation flow terminates.
Claims (1)
1. a kind of anti-blasting method for the glass partition for being placed on vacuum environment, used anti-demolition set holds including high vacuum
Device（2）, low vacuum container（3）, high vacuum pipe（4）, Roughing line（5）, high vacuum regulates（6）, low vacuum regulates（7）、
Vacuum switch I（8）, vacuum switch II（9）, high-vacuum electromagnetic valve I（10）, high-vacuum electromagnetic valve II（11）, safety blasting piece I
（12）, safety blasting piece II（13）, electric control circuit（14）, PLC control system（15）, vacuum-control(led) system（16）, air inlet
Valve（17）；
Characterized in that, anti-blasting method is as follows：
Described high vacuum jar（2）With low vacuum container（3）Between place glass partition（1）；Described high vacuum pipe（4）
With high vacuum jar（2）Connection, high vacuum pipe（4）On high vacuum be installed regulated（6）With vacuum switch I（8）；Described is low
Vacuum pipe（5）With low vacuum container（3）Connection, Roughing line（5）On have installation low vacuum regulate（7）With vacuum switch II
（9）；Described high vacuum pipe（4）And Roughing line（5）Between high-vacuum electromagnetic valve I in parallel（10）, high-vacuum electromagnetic valve
Ⅱ（11）, safety blasting piece I（12）With safety blasting piece II（13）；Intake valve is placed on low vacuum container；
Described high vacuum is regulated（6）Regulated with low vacuum（7）Vacuum readings pass through electric control circuit（14）Transmit to PLC
Control system（15）, PLC control system（15）Control command pass through electric control circuit（14）Transmit paramount vacuum solenoid I
（10）With high-vacuum electromagnetic valve II（11）；
Described vacuum switch I（8）Pass through set value calculation high-vacuum electromagnetic valve I（10）With high-vacuum electromagnetic valve II（11）Simultaneously
Open or close；Described vacuum switch II（9）Pass through set value calculation high-vacuum electromagnetic valve I（10）With high-vacuum electromagnetic valve II
（11）Open or close simultaneously；
Described high vacuum jar（2）With low vacuum container（3）Between pressure difference control safety blasting piece I（12）It is quick-fried with safety
Fragmentation II（13）Explosion, safety blasting piece I（12）, safety blasting piece II（13）Blasting direction it is opposite；
Described high vacuum jar（2）With low vacuum container（3）Enter from atmospheric pressure in the pumping flow of high low vacuum, it is high
Vacuum solenoid I（10）With high-vacuum electromagnetic valve II（11）Stay open connected state；And high vacuum is regulated（6）And low vacuum
Regulate（7）Delta pressure readings are compared in real time；
Described PLC control system（15）With high vacuum jar（2）With low vacuum container（3）Connect the vacuum-control(led) system of pumping
（16）Between have hardware contact safety interlocking signal, work as PLC control system（15）When sending license pumping contact signal, vacuum control
System processed（16）Start pumping；
Described PLC control system（15）With high vacuum jar（2）With low vacuum container（3）Connect the vacuum-control(led) system of pumping
（16）Between have software communication interlocking signal by Ethernet, work as PLC control system（15）Send license pumping control signal
When, vacuum-control(led) system starts pumping；
Described high vacuum jar（2）With low vacuum container（3）Enter from atmospheric pressure in the pumping flow of high low vacuum, when
Low vacuum container（3）During vacuum P2≤1000Pa, PLC control system（15）Control high-vacuum electromagnetic valve I（10）And high vacuum
Magnetic valve II（11）Close, low vacuum container（3）Into pressurize flow, the vacuum-control(led) system of pumping（16）Only high vacuum is held
Device（2）Fine pumping is carried out, until high vacuum jar（2）Interior pressure is less than or equal to 1 × 10-4Pa, low vacuum container（3）Enter
Enter packing state；
Described high vacuum jar（2）With low vacuum container（3）Enter from atmospheric pressure in the pumping flow of high low vacuum,
PLC control system（15）High vacuum jar is compared in real time（2）With low vacuum container（3）Vacuum P1 and P2, both differences
5000Pa, otherwise, PLC control system must be consistently less than（15）Overpressure alarm will be sent；
Described high vacuum jar（2）With low vacuum container（3）Enter from vacuum state in the deflation flow of atmospheric pressure,
PLC control system（15）Control high-vacuum electromagnetic valve I（10）With high-vacuum electromagnetic valve II（11）Keep connected state；That is PLC is controlled
System processed（15）High vacuum jar is compared in real time（2）With low vacuum container（3）Vacuum P1 and P2, both differences must begin
It is less than 5000Pa, otherwise, PLC control system eventually（15）Overpressure alarm will be sent；
Described PLC control system（15）With emergent management function, there is danger button on field control cabinet and upper computer software,
Upon occurrence of an emergency situation, high-vacuum electromagnetic valve I is opened at once（10）With high-vacuum electromagnetic valve II（11）, make glass partition（1）
All the time it is in a safe condition；
Pressurize flow comprises the following steps：
A. device power and self-test；
B. the first order is protected：It is by PLC control system（15）Pass through electric control circuit（14）Regulated with high vacuum（6）With it is low
Vacuum gauge（7）Link together, when the reading of any one vacuum gauge exceedes setting value, PLC automatic control program
" leakage alarm " can be sent order and send sound and light alarm to buzzer, realize that PLC program software automatically controls sound and light alarm protection；
After troubleshooting, PLC automatic control program can send the order of leakage alarm reset, and stop alarm, system return to pressurize
Flow；
C. the second level is protected：It is by PLC control system（15）Pass through electric control circuit（14）Regulated with high vacuum（6）With it is low
Vacuum gauge（7）, and two high-vacuum electromagnetic valves I in parallel（10）With high-vacuum electromagnetic valve II（11）Link together；When
The leakage alarm of the first order is not effectively addressed, when the reading of vacuum gauge continuously rises to the threshold value of automatic valve opening, PLC
Program software automatically controls high-vacuum electromagnetic valve I according to the reading of vacuum gauge（10）With high-vacuum electromagnetic valve II（11）Valve opening is let out
Pressure, realizes that PLC softwares automatically control valve opening decompression protection；Work as glass partition（1）Pressure between both sides reduces rapidly until flat
After weighing apparatus, PLC automatic control program can send the order of valve opening pressure release reset, high-vacuum electromagnetic valve I（10）And high-vacuum electromagnetic
Valve II（11）Automatic to close, system returns to pressurize flow；
D. the third level is protected：It is by vacuum switch I（8）Or vacuum switch II（9）Pass through electric control circuit（14）With high vacuum
Magnetic valve I（10）Or high-vacuum electromagnetic valve II（11）It is connected；When the first order and second level shielding failure, glass partition（1）Both sides
Pressure continue to increase, reach vacuum switch I（8）Or vacuum switch II（9）Setting value when, vacuum switch I（8）Or vacuum is opened
Close II（9）Send contact signal control high-vacuum electromagnetic valve I（10）Or high-vacuum electromagnetic valve II（11）Open, realize electrical hardware
Valve opening decompression protection；Work as glass partition（1）After pressure between both sides reduces until balancing rapidly, vacuum switch I（8）Or vacuum
Switch II（9）Output contact control signal releases, high-vacuum electromagnetic valve（10）With（11）Automatically it is re-closing off, system returns to guarantor
Flow is pressed, realizes electrical hardware valve opening decompression protection；
E. the fourth stage is protected：By high vacuum jar（2）With low vacuum container（3）Between safety blasting piece I in parallel（12）And peace
Full rupture disk II（13）Composition, blasting direction are opposite；Current three-level protective fails, glass partition（1）The pressure of both sides continues
Increase, when reaching the setting explosion threshold value of safety blasting piece, rupture disk automatic-explosion pressure release, realizes mechanical level hardware protection；It is complete
Entirely independently of electric control system, safety blasting piece I（12）With safety blasting piece II（13）Automatic-explosion pressure release, glass partition
（1）Between both sides, i.e., the pressure between height empty container reduces rapidly until balance, treats Chu Liwan failures, replacing rupture disk, be
System recovers normal pressurize flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610306547.3A CN105927858B (en) | 2016-05-11 | 2016-05-11 | A kind of anti-blasting method for the glass partition for being placed on vacuum environment |
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|---|---|---|---|
| CN201610306547.3A CN105927858B (en) | 2016-05-11 | 2016-05-11 | A kind of anti-blasting method for the glass partition for being placed on vacuum environment |
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| CN105927858B true CN105927858B (en) | 2017-12-15 |
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| CN110554163A (en) * | 2019-09-17 | 2019-12-10 | 西安近代化学研究所 | Sample tube for combustion-to-detonation test |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1987193A (en) * | 2006-12-25 | 2007-06-27 | 浙江大学 | Warning device for hydrogen safety security |
| CN102937603A (en) * | 2012-10-19 | 2013-02-20 | 中国石油化工股份有限公司 | High-temperature high-pressure explosion limit tester, method for determining explosion limit, and application thereof |
| CN102954346A (en) * | 2011-08-17 | 2013-03-06 | 总装备部工程设计研究总院 | Cryogenic insulation mobile storage tank safety system |
| CN105501344A (en) * | 2015-12-10 | 2016-04-20 | 重庆慧团商贸有限公司 | Explosion-proof fuel tank for parallel-connection multi-chamber motorcycle |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8534308B2 (en) * | 2009-10-05 | 2013-09-17 | Delaware Capital Formation | Pressure control and relief system |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1987193A (en) * | 2006-12-25 | 2007-06-27 | 浙江大学 | Warning device for hydrogen safety security |
| CN102954346A (en) * | 2011-08-17 | 2013-03-06 | 总装备部工程设计研究总院 | Cryogenic insulation mobile storage tank safety system |
| CN102937603A (en) * | 2012-10-19 | 2013-02-20 | 中国石油化工股份有限公司 | High-temperature high-pressure explosion limit tester, method for determining explosion limit, and application thereof |
| CN105501344A (en) * | 2015-12-10 | 2016-04-20 | 重庆慧团商贸有限公司 | Explosion-proof fuel tank for parallel-connection multi-chamber motorcycle |
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