CN109488875A - The liquid nitrogen automatic filling system and its control method of FTIR online monitoring instruments - Google Patents
The liquid nitrogen automatic filling system and its control method of FTIR online monitoring instruments Download PDFInfo
- Publication number
- CN109488875A CN109488875A CN201811331498.4A CN201811331498A CN109488875A CN 109488875 A CN109488875 A CN 109488875A CN 201811331498 A CN201811331498 A CN 201811331498A CN 109488875 A CN109488875 A CN 109488875A
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- China
- Prior art keywords
- liquid nitrogen
- storage tank
- relief valve
- nitrogen storage
- sliding table
- Prior art date
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 227
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 114
- 239000007788 liquid Substances 0.000 title claims abstract description 107
- 238000005033 Fourier transform infrared spectroscopy Methods 0.000 title claims abstract description 34
- 238000012544 monitoring process Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000000945 filler Substances 0.000 claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 238000003780 insertion Methods 0.000 claims abstract description 5
- 230000037431 insertion Effects 0.000 claims abstract description 5
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 71
- 230000007246 mechanism Effects 0.000 claims description 63
- 238000007789 sealing Methods 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 230000001360 synchronised effect Effects 0.000 claims description 6
- 230000003028 elevating effect Effects 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 5
- 230000033001 locomotion Effects 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 238000002309 gasification Methods 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 230000008094 contradictory effect Effects 0.000 claims 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 4
- 230000010354 integration Effects 0.000 abstract description 4
- 230000003287 optical effect Effects 0.000 abstract description 4
- 230000006837 decompression Effects 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 238000009434 installation Methods 0.000 description 5
- 239000000523 sample Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000001960 triggered effect Effects 0.000 description 2
- 238000000862 absorption spectrum Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Classifications
-
- 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
- F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
- F17C5/02—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with liquefied gases
-
- 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
-
- 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
- F17C13/04—Arrangement or mounting of valves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
-
- 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
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/01—Pure fluids
- F17C2221/014—Nitrogen
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Filling Of Jars Or Cans And Processes For Cleaning And Sealing Jars (AREA)
Abstract
The invention belongs to optical instrument to maintain equipments, more particularly to the liquid nitrogen automatic filling system and its control method of a kind of FTIR online monitoring instruments, including liquid nitrogen storage tank and filler pipe, out of the bottleneck of liquid nitrogen storage tank insertion liquid nitrogen storage tank, the other end is connected to the Dewar bottle inner cavity of FTIR online monitoring instruments for one end of the filler pipe；Electric heater unit is additionally provided in the liquid nitrogen storage tank, the filler pipe is equipped with relief valve, and the start and stop of the loading system are jointly controlled by relief valve and electric heater unit.The present invention carries out Integration Design and Optimal improvements to the pump head of the liquid nitrogen automatic filling system of FTIR online monitoring instruments, high pressure nitrogen is forced to be passed through in FTIR online monitoring instruments by the closure of relief valve, and loading system decompression is made by the unlatching of relief valve, to stop filling, and it is aided with heating device and is pressurized, simply, timing, the quantitative filling of liquid nitrogen are efficiently realized, system stability is good, operating accuracy is high.
Description
Technical field
The invention belongs to optical instrument to maintain equipments, and in particular to a kind of liquid nitrogen automatic filling of FTIR online monitoring instruments
System and its control method.
Background technique
FTIR online monitoring instruments are the air detection equipment detected using infrared absorption spectrum to Atmospheric components, are made
For the forefront technology in air detection field, quickly grow in recent years.And the spectra collection needs of FTIR online monitoring instruments are red
External signal transmitting unit and receiving unit cooperate, and infrared signal probe unit therein is higher to the susceptibility of temperature, need
It is maintained under the working environment of low temperature and is just able to achieve detected with high accuracy, because FTIR online monitoring instruments are needed to infrared signal
Probe unit carries out continued down.
Reachable -196 DEG C of liquid nitrogen temperature, in FTIR instrument, mainly freezes to infrared signal probe unit, pass through
Refrigeration can reduce the thermal noise of probe unit.And the Dewar bottle of FTIR instrument adds a liquid nitrogen at most to use for 24 hours, for supervising online
It surveys for instrument and needs maintenance on duty, periodically the liquid nitrogen in Dewar bottle is supplemented, so not only lost labor, but also be difficult to
Ensure the continuous supply of liquid nitrogen, to influence the detection accuracy of instrument.
Summary of the invention
The object of the present invention is to provide a kind of liquid nitrogen automatic filling systems for FTIR online monitoring instruments being simple and efficient
System and its charging method.
To achieve the above object, the present invention provides following technical schemes: a kind of liquid nitrogen of FTIR online monitoring instruments from
Liquid nitrogen storage tank is inserted into from the bottleneck of liquid nitrogen storage tank in one end of dynamic loading system, including liquid nitrogen storage tank and filler pipe, the filler pipe
Bottom of bottle that is interior and extending to liquid nitrogen storage tank, the other end are connected to the Dewar bottle inner cavity of FTIR online monitoring instruments；The filler pipe
It is connect with liquid nitrogen storage tank bottle sealing；Electric heater unit is additionally provided in the liquid nitrogen storage tank, the filler pipe is equipped with relief valve,
The start and stop of the loading system are jointly controlled by relief valve and electric heater unit, and when electric heater unit starting and relief valve is closed
When, loading system is in filling state, is directly entered in Dewar bottle after liquid nitrogen gasification at this time, when electric heater unit closing and pressure release
When valve starts, loading system, which is in, stops filling state, and the nitrogen to gasify in liquid nitrogen storage tank directly passes through relief valve and is emitted into greatly
In gas.
The relief valve is electromagnetic relief valve, and the start and stop of the electric heater unit and relief valve pass through automatic controller control
System, automatic controller includes timer, and automatic controller is according to the time cycle automatic control electrical heating device of setting and pressure release
The start and stop state of valve.
System further includes liquidometer and pressure sensor, and the liquidometer is from the bottleneck insertion liquid nitrogen storage tank of liquid nitrogen storage tank
And the bottom of bottle of liquid nitrogen storage tank is extended to, the pressure sensor is connected to by hose with liquid nitrogen storage tank bottle sealing；The filling
Safety valve is additionally provided on pipe.
Temperature sensor is additionally provided in the Dewar bottle of the FTIR online monitoring instruments, the signal of the temperature sensor is defeated
Outlet is electrically connected with automatic controller, and the signal control relief valve and electricity that the automatic controller is acquired according to temperature sensor add
The start and stop of thermal.
The bottle mouth position of the liquid nitrogen storage tank is equipped with pump head pedestal, and exhaust passage is offered in the pump head pedestal, described to add
Note pipe is connected with the exhaust passage, and the lead of the relief valve and electric heater unit is mounted on pump head pedestal, the pump head bottom
Pressure sensor, and/or safety valve are installed on seat.
The relief valve includes a cone cell spool, and the relief hole of connection filler pipe official jargon is offered on the pump head pedestal,
The cone cell spool moves back and forth along the vertical direction and constitutes opening and closing movement, cone cell spool upper end and relay iron with relief hole
It is affixed, reset spring is set on cone cell spool, reset spring lower end is abutted with relief hole aperture.
Protection cover-cap is additionally provided on the pump head pedestal, each sensor lead and control circuit board are integrated in protection cover-cap
Inside, the relief hole also are located inside protection cover-cap, and the protection cover-cap top is equipped with gas vent.
The bottom of the pump head pedestal is equipped with connecting flange, and the connecting flange is docked with the flange of liquid nitrogen storage tank bottle mouth position
And two are equipped with sealing ring between end face of flange, two flange peripheries are engaged by Hafu-type clip；Two halfbodies of Hafu-type clip
Setting is moved back and forth in the horizontal direction, and the roof of the Hafu-type clip is equipped with retaining mechanism, and the retaining mechanism is assembled
For when retaining mechanism is locked can flange top surface to pump head pedestal apply pressing force.
System further includes the elevating mechanism for driving pump head pedestal to move back and forth along the vertical direction；The elevating mechanism packet
Lifting sliding table is included, the pump head pedestal is connect with lifting sliding table, and first is equipped between the lifting sliding table and Hafu-type clip
Motivation structure, first linkage mechanism, which fitted to be the first linkage mechanism when lifting sliding table downlink, can drive Hafu-type clip
Halved body engaging, and the first linkage mechanism can drive the halved body of Hafu-type clip to separate when lifting sliding table uplink.
First linkage mechanism includes the horizontal guide being arranged on the outside of Hafu-type clip halved body, the guide rod and base
The guide sleeve of upper setting is slidably connected, and the guide rod is equipped with idler wheel far from one end of Hafu-type clip, between the guide rod and guide sleeve
Equipped with spring, the spring, which fitted to be its elastic force, can drive the halved body of Hafu-type clip to be transported in the direction away from each other
Dynamic, the bottom of the lifting sliding table and the idler wheel corresponding position are equipped with wedge-shaped drive block, and the wedge shape drive block is assembled
For when lifting sliding table downlink, wedge-shaped drive block can squeeze the idler wheel and drive the halved body of the Hafu-type clip mutual
It is close.
The retaining mechanism includes the cam hinged with the roof of Hafu-type clip, the wheel face and pump head pedestal of the cam
On the top surface of flange abut, a swing rod is fixed on the cam, the swing rod overhangs to the outside of Hafu-type clip to be arranged,
The protrusion that the swing rod and cam fitted to be the cam when swing rod pushes can be pressed down against the flange top surface of pump head pedestal,
And when swing rod press to the top surface of Hafu-type clip contradict when cam protrusion just put minimum point to make cam and
Swing rod is self-locking.
The second linkage mechanism is equipped between the retaining mechanism and lifting sliding table, second linkage mechanism, which is fitted to be, works as
When lifting sliding table downlink, the second linkage mechanism can drive the swing rod to push, and when lifting sliding table uplink, the second gear
Structure can drive and lift on the swing rod.
The lifting sliding table is equipped with the circular hole for avoiding pump head pedestal, and second linkage mechanism includes circular-hole internal-wall
On overhang the upper shifting block and lower shifting block of setting to center of circular hole, the upper shifting block is for stirring the swing rod bottom, and lower shifting block is for dialling
It is lifted on movable pendulum bar, the cantilevered length of the upper shifting block is greater than the cantilevered length of lower shifting block, and the cantilevered length of lower shifting block is set
For when lifting sliding table downlink, shifting block can avoid the swing rod in upper lift station completely at present, and set aside when lifting sliding table uplink
Block can be abutted with the projecting end in the swing rod for pushing station.
The two sides of the pump head pedestal are symmetrically arranged with horizontally-guided pin, and the top surface of the lifting sliding table is equipped with limit
Plate offers the vertical waist-shaped hole being slidably matched with the guide pin on the limit plate.
The both ends of the lifting sliding table are respectively equipped with vertical threaded hole, and the lifting sliding table passes through the threaded hole and two screw rods
Composition is threadedly engaged, and the screw rod both ends are rotatably arranged on base respectively, and lifting motor, the liter are equipped at the top of the base
It drops motor and constitutes transmission cooperation by synchronous pulley and two screw rods.
System further includes liquid nitrogen storage tank charging crane, and the liquid nitrogen storage tank charging crane includes by more rotation settings side by side
The pedestal that constitutes of roller, one end of the pedestal is equipped with inclined slip, and the pedestal top is equipped with liquid nitrogen storage tank positioning mechanism,
The liquid nitrogen storage tank positioning mechanism includes the arc backboard that the side far from inclined slip is arranged, and close to the one of inclined slip
The elastic pressure roller in side symmetrically arranged two, constitutes the sky for receiving liquid nitrogen storage tank between described two elastic pressure rollers and arc backboard
Between, the mutually folding setting in left-right direction of described two elastic pressure rollers, the roller seat of two elastic pressure rollers is equipped with horizontally-guided bar, described
Guide rod is slidably matched with base composition, and pressure spring is equipped between the roller seat and base；Arc backboard phase along the longitudinal direction
Setting is mutually moved back and forth, the base is equipped with the piston cylinder for driving arc backboard to move back and forth.
The present invention also provides the control methods of the liquid nitrogen automatic filling system for FTIR online monitoring instruments:
One are as follows: according to the time cycle circulating open close electric heater unit and relief valve of setting, and when electric heater unit is opened
Relief valve close synchronously when opening, when electric heater unit is closed, relief valve is synchronous opens, and the every 8-12h of electric heater unit opens one
It is secondary, 3-10min is opened every time.
Secondly are as follows: electric heater unit and relief valve are controlled according to the acquisition signal for the temperature sensor being arranged in liquid nitrogen storage tank
Start and stop, specifically: when temperature be higher than -180 DEG C when, open electric heater unit simultaneously close relief valve, when temperature is at < -193 DEG C
Shi Lianxu keeps 80s, that is, thinks that liquid feeding nitrogen is completed, and closes electric heater unit at this time and opens relief valve.
The technical effects of the invention are that: the present invention is to the liquid nitrogen automatic filling system for FTIR online monitoring instruments
Pump head carries out Integration Design and Optimal improvements, forces high pressure nitrogen to be passed through in optical instrument by the closure of relief valve, and lead to
The unlatching for crossing relief valve makes loading system decompression, to stop filling, and is aided with heating device and is pressurized, simple, efficient
Timing, the quantitative filling of liquid nitrogen are realized, system stability is good, operating accuracy is high.
Detailed description of the invention
Fig. 1 is the schematic perspective view of liquid nitrogen loading system provided by the embodiment of the present invention；
Fig. 2 is the explosive view of liquid nitrogen loading system provided by the embodiment of the present invention；
Fig. 3 is the cross-sectional view of liquid nitrogen loading system provided by the embodiment of the present invention；
Fig. 4 is partial structural diagram where pump head provided by the embodiment of the present invention；
Fig. 5 is the schematic perspective view of pump head provided by the embodiment of the present invention；
Fig. 6 is the main view of liquid nitrogen storage tank charging crane provided by the embodiment of the present invention；
Fig. 7 is the perspective view of liquid nitrogen storage tank charging crane provided by the embodiment of the present invention；
Fig. 8 is that the cross-sectional view of liquid nitrogen storage tank charging crane and the second linkage mechanism provided by the embodiment of the present invention exist
Partial enlarged view under different station state；
Fig. 9 is the schematic perspective view of lifting sliding table provided by the embodiment of the present invention；
Figure 10 is the perspective view of the first linkage mechanism provided by the embodiment of the present invention；
Figure 11 is the perspective view of liquid nitrogen storage tank positioning mechanism provided by the embodiment of the present invention.
Specific embodiment
Below in conjunction with attached drawing 1-11, detailed description of the preferred embodiments, it should be strongly noted that
The statement of indicating positions such as heretofore described " left and right " " front and backs " is all based on for the actual installation state of equipment, such as
In Figure 11, side where side where inclined slip is front, arc backboard is rear.
As shown in Figure 1, 2, 3, a kind of liquid nitrogen automatic filling system for FTIR online monitoring instruments, including liquid nitrogen storage tank
10 and filler pipe 21, one end of the filler pipe 21 out of the bottleneck of liquid nitrogen storage tank 10 insertion liquid nitrogen storage tank 10 and extends to liquid nitrogen
The bottom of bottle of storage tank 10, the other end are connected to the Dewar bottle inner cavity of FTIR online monitoring instruments, and pipeline is equipped with necessary unidirectional
Valve；The filler pipe 21 is connect with 10 bottle sealing of liquid nitrogen storage tank；Electric heater unit 24, institute are additionally provided in the liquid nitrogen storage tank 10
Filler pipe 21 is stated equipped with relief valve 22, the start and stop of the loading system are jointly controlled by relief valve 22 and electric heater unit 24,
When electric heater unit 24 starting and relief valve 22 close when, loading system is in filling state, at this time after liquid nitrogen gasification directly into
Enter in Dewar bottle, when electric heater unit 24 is closed and relief valve 22 is opened, loading system, which is in, stops filling state, liquid nitrogen storage
The nitrogen to gasify in tank 10 directly passes through relief valve 22 and is emitted into atmosphere.The present invention is to the liquid for FTIR online monitoring instruments
The pump head of nitrogen automatic filling system carries out Integration Design and Optimal improvements, forces high pressure nitrogen logical by the closure of relief valve 22
Enter in optical instrument, and loading system decompression made by the unlatching of relief valve 22, to stop filling, and be aided with heating device into
Row pressurization, timing, quantitative filling simple, that efficiently realize liquid nitrogen, system stability is good, operating accuracy is high.
Embodiment 1
As one of embodiment of the invention, the relief valve 22 is electromagnetic relief valve 22, the electric heater unit
24 and the start and stop of relief valve 22 pass through automatic controller control, automatic controller includes timer, and automatic controller is according to setting
The start and stop state of fixed time cycle automatic control electrical heating device 24 and relief valve 22.The specific control method of the embodiment
Are as follows: it is let out according to the time cycle circulating open close electric heater unit 24 and relief valve 22 of setting, and when electric heater unit 24 is opened
22 close synchronously of pressure valve, when electric heater unit 24 is closed, relief valve 22 is synchronous opens, and the every 8-12h of electric heater unit 24 opens one
It is secondary, 3-10min is opened every time.
System further includes liquidometer 25 and pressure sensor 23, and the liquidometer 25 is inserted into liquid from the bottleneck of liquid nitrogen storage tank 10
Nitrogen storage tank 10 is interior and extends to the bottom of bottle of liquid nitrogen storage tank 10, and the pressure sensor 23 is close by hose and 10 bottleneck of liquid nitrogen storage tank
Envelope connection；Safety valve is additionally provided on the filler pipe 21.
Embodiment 2
As another embodiment of the present invention, temperature sensing is additionally provided in the Dewar bottle of the FTIR online monitoring instruments
The signal output end of device, the temperature sensor is electrically connected with automatic controller, and the automatic controller is according to temperature sensor
The start and stop of signal the control relief valve 22 and electric heater unit 24 of acquisition.The specific control method of the embodiment are as follows: according to Dewar
The start and stop of acquisition signal the control electric heater unit 24 and relief valve 22 of the temperature sensor being arranged in bottle, specifically: work as temperature
When higher than -180 DEG C, opens electric heater unit 24 and close relief valve 22,80s is continuously kept when temperature is at < -193 DEG C, i.e.,
Think that liquid feeding nitrogen is completed, close electric heater unit 24 at this time and opens relief valve 22.
Embodiment 3
As shown in Figure 4,5, a kind of liquid nitrogen fills pump head, the pump head pedestal of the bottle mouth position setting including the liquid nitrogen storage tank 10
20, exhaust passage is offered in the pump head pedestal 20, and the filler pipe 21 is connected with the exhaust passage, 22 He of relief valve
The lead of electric heater unit 24 is mounted on pump head pedestal 20, and pressure sensor 23 and safety are installed on the pump head pedestal 20
The safe pressure of valve, safety valve is set as 20Kpa.The present invention carries out Integration Design, all components to liquid nitrogen loading system
It is integrated on pump head pedestal 20, greatly facilitates the disassembly and installation between loading system and liquid nitrogen storage tank 10, convenient for quick
Replace liquid nitrogen storage tank 10.
Specifically, the relief valve 22 includes a cone cell spool 221, connection filler pipe is offered on the pump head pedestal 20
The relief hole of 21 official jargons, the cone cell spool 221 move back and forth along the vertical direction and constitute opening and closing movement, mitre valve with relief hole
221 upper end of core and relay iron are affixed, and reset spring, reset spring lower end and relief hole hole are set on cone cell spool 221
Mouth abuts.
Protection cover-cap 30 is additionally provided on the pump head pedestal 20, each sensor lead and control circuit board 32 are integrated in anti-
Inside shroud cover 30, the relief hole also is located inside protection cover-cap 30, and 30 top of protection cover-cap is equipped with gas vent 31.When
In standby mode, relief valve 22 is kept it turning on loading system, and nitrogen can be filled in the cavity that protected enclosure surrounds at this time, real
The self-protection of existing system, in addition opens up gas vent 31, it is ensured that the normal pressure release of system on housing.
As shown in Figure 6,7, the bottom of the pump head pedestal 20 is equipped with connecting flange, the connecting flange and liquid nitrogen storage tank 10
The flange of bottle mouth position docks and is equipped with sealing ring 41 between two end face of flange, and two flange peripheries are engaged by Hafu-type clip 40；
Two halfbodies of Hafu-type clip 40 move back and forth setting in the horizontal direction, and the roof of the Hafu-type clip 40 is equipped with locking
Mechanism, the retaining mechanism fitted to be when retaining mechanism locking can flange top surface to pump head pedestal 20 apply and compress
Power.
As illustrated in figures 6-10, system further includes the elevator for driving pump head pedestal 20 to move back and forth along the vertical direction
Structure；The elevating mechanism includes lifting sliding table 45, and the pump head pedestal 20 is connect with lifting sliding table 45, the lifting sliding table 45 with
It is equipped with the first linkage mechanism between Hafu-type clip 40, first linkage mechanism fitted to be when 45 downlink of lifting sliding table the
One linkage mechanism can drive the halved body of Hafu-type clip 40 to engage, and the first linkage mechanism energy when 45 uplink of lifting sliding table
Enough drive the halved body separation of Hafu-type clip 40.
First linkage mechanism includes the horizontal guide 41 being arranged on the outside of 40 halved body of Hafu-type clip, the guide rod 41
It is slidably connected with the guide sleeve 42 being arranged on base 1, the guide rod 41 is equipped with idler wheel 44 far from one end of Hafu-type clip 40, described
Spring 43 is equipped between guide rod 41 and guide sleeve 42, the spring 43, which fitted to be its elastic force, can drive the two of Hafu-type clip 40
Halfbody moves in the direction away from each other, and the bottom of the lifting sliding table 45 and 44 corresponding position of idler wheel are equipped with wedge shape and drive
Motion block 46, the wedge shape drive block 46 are fitted to be when 45 downlink of lifting sliding table, and wedge-shaped drive block 46 can squeeze the rolling
Wheel 44 simultaneously drives the halved body of the Hafu-type clip 40 close to each other.
The retaining mechanism includes the cam 401 hinged with the roof of Hafu-type clip 40, the wheel face of the cam 401 with
The top surface of flange on pump head pedestal 20 abuts, and is fixed with a swing rod 402 on the cam 401, and the swing rod 402 is to Hafu-type
The outside of clip 40, which overhangs, to be arranged, and the swing rod 402 fitted to be the protrusion of the cam 401 when swing rod 402 pushes with cam 401
Portion can be pressed down against the flange top surface of pump head pedestal 20, and contradict when swing rod 402 is pressed to the top surface of Hafu-type clip 40
When cam 401 protrusion put minimum point just to keeping cam 401 and swing rod 402 self-locking.
The second linkage mechanism is equipped between the retaining mechanism and lifting sliding table 45, second linkage mechanism is fitted to be
When 45 downlink of lifting sliding table, the second linkage mechanism can drive the swing rod 402 to push, and when 45 uplink of lifting sliding table,
Second linkage mechanism can drive and lift on the swing rod 402.
The lifting sliding table 45 is equipped with the circular hole for avoiding pump head pedestal 20, and second linkage mechanism includes circular hole
To the upper shifting block 451 and lower shifting block 452 of center of circular hole overhanging setting on inner wall, the upper shifting block 451 is for stirring under swing rod 402
Pendulum, lower shifting block 452 are lifted on swing rod 402 for stirring, and the overhanging that the cantilevered length of the upper shifting block 451 is greater than lower shifting block 452 is long
Degree, and the cantilevered length of lower shifting block 452 is arranged to when shifting block 452 can avoid completely in upper 45 downlink of lifting sliding table at present
The swing rod 402 of station is lifted, and when shifting block 452 can be with hanging in the swing rod 402 for pushing station at present for 45 uplink of lifting sliding table
End is stretched to abut.
The two sides of the pump head pedestal 20 are symmetrically arranged with horizontally-guided pin 201, set on the top surface of the lifting sliding table 45
There is limit plate, the vertical waist-shaped hole 47 being slidably matched with the guide pin 201 is offered on the limit plate.
The both ends of the lifting sliding table 45 are respectively equipped with vertical threaded hole, and the lifting sliding table 45 passes through the threaded hole and two
The composition of screw rod 48 is threadedly engaged, and 48 both ends of screw rod are rotatably arranged on respectively on base 1, and lifting is equipped at the top of the base 1
Motor 49, the lifting motor 49 constitute transmission cooperation by synchronous pulley 491 and two screw rods 48.
As shown in figure 11, system further includes 10 charging crane of liquid nitrogen storage tank, 10 charging crane of liquid nitrogen storage tank include by
One end of the pedestal 50 that the more rollers 51 for rotating setting side by side are constituted, the pedestal 50 is equipped with inclined slip 55, the pedestal
50 tops are equipped with 10 positioning mechanism of liquid nitrogen storage tank, and 10 positioning mechanism of liquid nitrogen storage tank includes that the side far from inclined slip 55 is set
The arc backboard 56 set, and close to the elastic pressure roller 54 in the side of inclined slip 55 symmetrically arranged two, described two elastic pressure rollers
The space for receiving liquid nitrogen storage tank 10 is constituted between 54 and arc backboard 56, described two elastic pressure rollers 54 are mutual in left-right direction
Folding setting, the roller seat of two elastic pressure rollers 54 are equipped with horizontally-guided bar 52, and the guide rod 52 constitutes sliding with base 1 and matches
It closes, pressure spring 53 is equipped between the roller seat and base 1；The arc backboard 56 mutually moves back and forth setting, institute along the longitudinal direction
Base 1 is stated equipped with the piston cylinder 57 for driving arc backboard 56 to move back and forth.
The installation of above-mentioned liquid nitrogen storage tank 10 and disassembly process are as follows:
Steel cylinder installation: first pushing to liquid nitrogen storage tank 10 on pedestal 50 along inclined slip 55, and steel cylinder squeezes during push
Compression elasticity pressure roller 54 opens elastic pressure roller 54, and as steel cylinder enters installation station, elastic pressure roller 54 resets and by steel cylinder pressure
Tightly；Subsequent start-up lifting motor 49 drives 45 downlink of lifting sliding table, and pump head pedestal 5020 and its component are dropped down by self gravity
Steel bottle mouth, then lifting sliding table 45 continues traveling downwardly, and the first linkage mechanism is triggered first, makes the halved body of Hafu-type clip 40
Close up, last lifting sliding table 45 continues traveling downwardly, and the second linkage mechanism is triggered, and upper shifting block 451 depresses swing rod 402, thus will
Hafu-type clip 40 and bottleneck flange are locked.
Steel cylinder dismounting: starting lifting motor 49 first, 45 uplink of lifting sliding table, lifting sliding table 45 trigger the second linkage first
Reset unlocks retaining mechanism, then continues uplink, and then triggers the reset of the second linkage mechanism, makes Hafu-type clip
40 halved body separation, subsequent lifting sliding table 45 still keeps uplink, and pump head pedestal 5020 and its component are held up, until pump
Head assembly completely disengages steel cylinder；Finally start piston cylinder 57, steel cylinder is ejected into pedestal 50 using arc backboard 56, disassembly is completed.
The present invention realizes being rapidly assembled and disassembled for liquid nitrogen storage tank 10 by a series of linkage mechanisms, and whole process only needs
Two sets of power mechanisms, it is not only easy to operate, quick, but also equipment cost is greatly saved.
Claims (10)
1. a kind of liquid nitrogen automatic filling system of FTIR online monitoring instruments, it is characterised in that: including liquid nitrogen storage tank (10) and add
One end of note pipe (21), the filler pipe (21) out of the insertion of the bottleneck of liquid nitrogen storage tank (10) liquid nitrogen storage tank (10) and extends to liquid
The bottom of bottle of nitrogen storage tank (10), the other end are connected to the Dewar bottle inner cavity of FTIR online monitoring instruments；The filler pipe (21) and liquid
The connection of nitrogen storage tank (10) bottle sealing；It is additionally provided with electric heater unit (24) in the liquid nitrogen storage tank (10), the filler pipe (21)
It is equipped with relief valve (22), the start and stop of the loading system are jointly controlled by relief valve (22) and electric heater unit (24), work as electricity
Heating device (24) starting and relief valve (22) close when, loading system is in filling state, at this time after liquid nitrogen gasification directly into
Enter in Dewar bottle, when electric heater unit (24) are closed and relief valve (22) starts, loading system, which is in, stops filling state, liquid
The nitrogen to gasify in nitrogen storage tank (10) directly passes through relief valve (22) and is emitted into atmosphere.
2. the liquid nitrogen automatic filling system of FTIR online monitoring instruments according to claim 1, it is characterised in that: described to let out
Pressure valve (22) is electromagnetic relief valve (22), and the start and stop of the electric heater unit (24) and relief valve (22) pass through automatic controller
Control, automatic controller include timer, and automatic controller is according to the time cycle automatic control electrical heating device (24) of setting
With the start and stop state of relief valve (22)；System further includes liquidometer (25) and pressure sensor (23), and the liquidometer (25) is certainly
Bottleneck insertion liquid nitrogen storage tank (10) of liquid nitrogen storage tank (10) is interior and extends to the bottom of bottle of liquid nitrogen storage tank (10), the pressure sensor
(23) it is connected to by hose with liquid nitrogen storage tank (10) bottle sealing；Safety valve is additionally provided on the filler pipe (21).
3. the liquid nitrogen automatic filling system of FTIR online monitoring instruments according to claim 1, it is characterised in that: described
Temperature sensor, the signal output end of the temperature sensor and automatic control are additionally provided in the Dewar bottle of FTIR online monitoring instruments
Device electrical connection processed, the automatic controller control relief valve (22) and electric heater unit according to the signal that temperature sensor acquires
(24) start and stop.
4. the liquid nitrogen automatic filling system of FTIR online monitoring instruments according to claim 1, it is characterised in that: the liquid
The bottle mouth position of nitrogen storage tank (10) is equipped with pump head pedestal (20), offers exhaust passage, the filling in the pump head pedestal (20)
Pipe (21) is connected with the exhaust passage, and the lead of the relief valve (22) and electric heater unit (24) is mounted on pump head pedestal (20)
On, pressure sensor (23) and/or safety valve are installed on the pump head pedestal (20)；The relief valve (22) includes a mitre valve
Core (221) offers the relief hole of connection filler pipe (21) official jargon, the cone cell spool (221) on the pump head pedestal (20)
It moves back and forth along the vertical direction and constitutes opening and closing movement with relief hole, cone cell spool (221) upper end and relay iron are affixed, cone
Reset spring is set on shape spool (221), reset spring lower end is abutted with relief hole aperture；On the pump head pedestal (20) also
Equipped with protection cover-cap (30), each sensor lead and control circuit board (32) are integrated in protection cover-cap (30) inside, described to let out
Pressure hole also is located at protection cover-cap (30) inside, and protection cover-cap (30) top is equipped with gas vent (31).
5. the liquid nitrogen automatic filling system of FTIR online monitoring instruments according to claim 4, it is characterised in that: the pump
The bottom of head pedestal (20) is equipped with connecting flange, and the connecting flange is docked with the flange of liquid nitrogen storage tank (10) bottle mouth position and two methods
Sealing ring (41) are equipped between blue end face, two flange peripheries are engaged by Hafu-type clip (40)；The two of Hafu-type clip (40)
A halfbody moves back and forth setting in the horizontal direction, and the roof of the Hafu-type clip (40) is equipped with retaining mechanism, the locking
Mechanism, which is fitted to be, can apply pressing force to the flange top surface of pump head pedestal (50) (20) when retaining mechanism locking.
6. the liquid nitrogen automatic filling system of FTIR online monitoring instruments according to claim 5, it is characterised in that: system is also
Including the elevating mechanism for driving pump head pedestal (50) (20) to move back and forth along the vertical direction；The elevating mechanism includes lifting
Slide unit (45), the pump head pedestal (50) (20) connect with lifting sliding table (45), the lifting sliding table (45) and Hafu-type clip
(40) the first linkage mechanism is equipped between, first linkage mechanism fitted to be the first linkage when lifting sliding table (45) downlink
Mechanism can drive the halved body of Hafu-type clip (40) to engage, and the first linkage mechanism can when lifting sliding table (45) uplink
Drive the halved body separation of Hafu-type clip (40)；
First linkage mechanism includes the horizontal guide (41) being arranged on the outside of Hafu-type clip (40) halved body, the guide rod
(41) it is slidably connected with the guide sleeve (42) being arranged on base (1), the guide rod (41) sets far from the one end of Hafu-type clip (40)
Have idler wheel (44), be equipped with spring (43) between the guide rod (41) and guide sleeve (42), the spring (43) fitted to be its elastic force
The halved body of Hafu-type clip (40) can be driven to move in the direction away from each other, the bottom of the lifting sliding table (45) and institute
It states idler wheel (44) corresponding position and is equipped with wedge-shaped drive block (46), the wedge shape drive block (46), which fitted to be, works as lifting sliding table
(45) when downlink, wedge-shaped drive block (46) can squeeze the idler wheel (44) and drive the halved body of the Hafu-type clip (40)
It is close to each other；
The retaining mechanism includes the cam (401) hinged with the roof of Hafu-type clip (40), the wheel face of the cam (401)
It is abutted with the top surface of the flange on pump head pedestal (50) (20), is fixed with a swing rod (402), the pendulum on the cam (401)
Bar (402) overhangs to the outside of Hafu-type clip (40) to be arranged, and the swing rod (402) and cam (401) fitted to be and work as swing rod
(402) protrusion of cam (401) can be pressed down against the flange top surface of pump head pedestal (50) (20) when pushing, and work as swing rod
(402) protrusion for pressing to cam (401) when contradicting with the top surface of Hafu-type clip (40) put minimum point just to make
Cam (401) and swing rod (402) are self-locking.
7. the liquid nitrogen automatic filling system of FTIR online monitoring instruments according to claim 6, it is characterised in that: the lock
It is equipped with the second linkage mechanism between tight mechanism and lifting sliding table (45), second linkage mechanism, which is fitted to be, works as lifting sliding table
(45) when downlink, the second linkage mechanism can drive the swing rod (402) to push, and when lifting sliding table (45) uplink, and second
Linkage mechanism can drive and lift on the swing rod (402)；
The lifting sliding table (45) is equipped with the circular hole for avoiding pump head pedestal (50) (20), and second linkage mechanism includes
To the upper shifting block (451) and lower shifting block (452) of center of circular hole overhanging setting on circular-hole internal-wall, the upper shifting block (451) is for dialling
Movable pendulum bar (402) bottom, lower shifting block (452) are lifted on swing rod (402) for stirring, and the cantilevered length of the upper shifting block (451) is big
Cantilevered length in lower shifting block (452), and the cantilevered length of lower shifting block (452) is arranged to work as lifting sliding table (45) downlink at present
Shifting block (452) can avoid the swing rod (402) in upper lift station completely, and work as lifting sliding table (45) uplink shifting block at present
(452) it can be abutted with the projecting end in the swing rod (402) for pushing station；
The two sides of the pump head pedestal (50) (20) are symmetrically arranged with horizontally-guided pin (201), the top of the lifting sliding table (45)
Face is equipped with limit plate, offers the vertical waist-shaped hole (47) being slidably matched with the guide pin (201) on the limit plate；
The both ends of the lifting sliding table (45) are respectively equipped with vertical threaded hole, and the lifting sliding table (45) passes through the threaded hole and two
Screw rod (48) composition is threadedly engaged, and screw rod (48) both ends are rotatably arranged on respectively on base (1), at the top of the base (1)
Equipped with lifting motor (49), the lifting motor (49) constitutes transmission cooperation by synchronous pulley (491) and two screw rods (48).
8. the liquid nitrogen automatic filling system of FTIR online monitoring instruments according to claim 7, it is characterised in that: system is also
Including liquid nitrogen storage tank (10) charging crane, liquid nitrogen storage tank (10) charging crane includes the roller for rotating setting side by side by more
(51) one end of the pedestal (50) constituted, the pedestal (50) is equipped with inclined slip (55), and pedestal (50) top is equipped with liquid
Nitrogen storage tank (10) positioning mechanism, liquid nitrogen storage tank (10) positioning mechanism include the arc that the side far from inclined slip (55) is arranged
Shape backboard (56), and the elastic pressure roller (54) in side symmetrically arranged two close to inclined slip (55), described two elastic pressure rollers
(54) space for receiving liquid nitrogen storage tank (10) is constituted between arc backboard (56), described two elastic pressure rollers (54) are along left and right
Direction mutually opens and closes setting, and the roller seat of two elastic pressure rollers (54) is equipped with horizontally-guided bar (52), the guide rod (52) and machine
Seat (1) is constituted and is slidably matched, and is equipped with pressure spring (53) between the roller seat and base (1)；The arc backboard (56) is along front and back
Setting is moved back and forth to mutual, the base (1) is equipped with the piston cylinder (57) for driving arc backboard (56) to move back and forth.
9. a kind of control of the liquid nitrogen automatic filling system of FTIR online monitoring instruments described in claim 1 to 8 any one
Method, it is characterised in that: according to the time cycle circulating open close electric heater unit (24) and relief valve (22) of setting, and when electricity adds
Relief valve (22) close synchronously when thermal (24) is opened, when electric heater unit (24) are closed, relief valve (22) is synchronous opens,
The every 8-12h of electric heater unit (24) is opened once, opens 3-10min every time.
10. a kind of control of the liquid nitrogen automatic filling system of FTIR online monitoring instruments described in claim 1 to 8 any one
Method, it is characterised in that: electric heater unit (24) are controlled according to the acquisition signal for the temperature sensor being arranged in Dewar bottle and are let out
The start and stop of pressure valve (22), specifically: when temperature is higher than -180 DEG C, opens electric heater unit (24) and close relief valve (22),
80s is continuously kept when temperature is at < -193 DEG C, that is, thinks that liquid feeding nitrogen is completed, and is closed electric heater unit (24) at this time and is opened and lets out
Pressure valve (22).
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| CN201811331498.4A CN109488875B (en) | 2018-11-09 | 2018-11-09 | Liquid nitrogen automatic filling system of FTIR online monitoring instrument and control method thereof |
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| CN201811331498.4A CN109488875B (en) | 2018-11-09 | 2018-11-09 | Liquid nitrogen automatic filling system of FTIR online monitoring instrument and control method thereof |
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| CN109488875B CN109488875B (en) | 2020-11-20 |
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| CN110159917A (en) * | 2019-05-20 | 2019-08-23 | 中国自然资源航空物探遥感中心 | A kind of liquid nitrogen automatic filling device and liquid nitrogen automatic filling system |
| CN111188751A (en) * | 2020-01-16 | 2020-05-22 | 重庆贝纳吉液氮生物容器有限公司 | Intelligent liquid nitrogen pump and method for pumping liquid nitrogen |
| CN112648537A (en) * | 2020-12-31 | 2021-04-13 | 苏州联点数据技术有限公司 | Induction system |
| CN112782248A (en) * | 2020-12-31 | 2021-05-11 | 苏州联点数据技术有限公司 | Sensing system |
| CN112833930A (en) * | 2020-12-31 | 2021-05-25 | 苏州联点数据技术有限公司 | Multifunctional sensing device |
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| CN112782248A (en) * | 2020-12-31 | 2021-05-11 | 苏州联点数据技术有限公司 | Sensing system |
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