CN103644353A - Quick pneumatic control self-sealing filling valve for low-temperature liquid nitrogen - Google Patents
Quick pneumatic control self-sealing filling valve for low-temperature liquid nitrogen Download PDFInfo
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- CN103644353A CN103644353A CN201310570841.1A CN201310570841A CN103644353A CN 103644353 A CN103644353 A CN 103644353A CN 201310570841 A CN201310570841 A CN 201310570841A CN 103644353 A CN103644353 A CN 103644353A
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- main valve
- drag hook
- cylinder
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
Abstract
The invention relates to a quick pneumatic control self-sealing filling valve for low-temperature liquid nitrogen at -197 DEG C. The quick pneumatic control self-sealing filling valve mainly consists of a self-sealing filling main valve and a pneumatic actuating mechanism and is used for solving the technical problem that manual control cannot be performed, the low-temperature liquid nitrogen is easily splashed, filling under pressure cannot be performed and the like in the low-temperature liquid nitrogen multiple-phase-flow filling process, and the pneumatic self-sealing filling process of the low-temperature liquid nitrogen is achieved. In the filling process, the main valve can be automatically opened in a two-way mode and self-sealed, and multiple-phase-flow splashing, leakage and other problems are not caused. The quick pneumatic control self-sealing filling valve is safe, reliable, convenient and durable, does not need manual and electric control, can be used in the pneumatic self-sealing filling process of the low-temperature liquid nitrogen, can be also used in the filling process of other ultra-low-temperature fluids, high-temperature fluids, combustible fluids, harmful fluids, toxic fluids and the like, and the self-sealing automatic filling process of a special extreme fluid is achieved.
Description
Technical field
The present invention relates to the quick selfsealings fill valve of pneumatic control technology for ℃ low temperature liquid nitrogen of a kind of-197, belong to Cryogenic valve technical equipment research and development field.The present invention controls loading technique feature according to-197 ℃ of low temperature liquid nitrogen self-sealing pneumatics, has invented the quick selfsealings fill valve of pneumatic control for low temperature liquid nitrogen, can realize the pneumatic control selfsealings filling process of cryogen.Not only can be used for the selfsealings automatic filling process of-197 ℃ of low temperature liquid nitrogens, and can be used for the selfsealings automatic filling process of the special extreme fluids such as the cryogen filling processes such as-163 ℃ of LNG and combustible fluid, harmful fluids, toxicity fluid.
Background technique
In general cryogenic refrigerating system, as low temperature fields such as low temperature liquid nitrogen, LNG Liquefied natural gas (LNG), gas separation and liquefaction, cryogen transmission and filling process in generally in overheated or saturation state, the general open system that adopts, by the cryogen valve open of annotating, directly under normal pressure, topple over or be injected into the received equipment of opening, received equipment generally all has reception opening large and that make progress.In filling process, cryogen easily undergoes phase transition and gasification rapidly, enters atmosphere environment after gasification.Traditional filling process easily causes the gasification loss of cryogen, and especially flammable cryogen easily causes inflammable gas filling diffusion.Secondly, cryogen filling can not with pressurely be annotated mostly, can not carry out multiphase flow filling, and normal pressure filling speed is slower, and the easy overheated splash of cryogen, easily causes the human injuries such as Cryogenic burns.In addition, equipment is because opening is less or need direct connecting pipeline to annotate in filling process mostly, cryogen Quick-gasifying in filling process, gasification gas is from cryogenic liquide import exhaust, cause the situations such as cryogenic liquide is difficult to add, or connecting pipeline joint is down to ultralow temperature fast, manually cannot operate, easily cause frostbite etc.Finally, the extreme fluids of great majority comprise ultralow temperature, superhigh temperature, toxic fluid or other multiphase flow fluid, exist manually-operable to be difficult to, electronic control easily sets off an explosion, multiphase flow easily spreads, high temperature is scalded, Cryogenic burns etc. extreme case in filling process.For overcoming the above problems, the present invention is on the basis of original selfsealings fill adapter, invented pneumatic selfsealings fill valve, pneumatic control actuator is applied to two-way quick self-sealing joint, four-way change-over valve is set and controls high low pressure air interchanger, transposing high low pressure air current flow direction, reach pneumatic control commutation effect, realize being certainly dynamically connected and function of automatically cutting off of low temperature main valve, can complete selfsealings, without leaking filling process with pressure and multiphase flow filling process, filling process is safe and reliable, not only be applicable to the ultralow temperature fluids such as low temperature liquid nitrogen, also be applicable to superhigh temperature, the automatic control selfsealings filling process of the extreme fluid such as toxicity.
Summary of the invention
The present invention is according to the mobile control feature of the ultralow temperature fluid of low flow liquid nitrogen, invented the quick selfsealings fill valve of pneumatic control for low temperature liquid nitrogen, this fill valve mainly consists of selfsealings filling main valve and pneumatic control actuator two-part, be used for solving a manually control technique difficult problem of cryogen filling process, realize cryogen pneumatic control selfsealings filling process.Only need to be by fill adapter near the cryogen that needs filling in filling process, pneumatic actuator just can pull fill adapter automatically, and joint is pulled to on positi locking conducting, after having annotated, can automatically open fill valve, realize two-way selfsealings, can not cause the problems such as cryogen leakage.Filling process is safe and reliable, facilitates durablely, without manually controlling, without electronic control, only needs pneumatic control, can complete the selfsealings of low temperature liquid nitrogen automatically without leaking filling process.
Technical solution of the present invention:
The quick selfsealings fill valve of pneumatic control for low temperature liquid nitrogen, comprise pneumatic actuator, selfsealings main valve two-part, pneumatic actuator comprises top cover (1), push rod (2), drag hook (3), U-shaped groove upper cap nut (4), U-shaped groove (5), U-shaped groove lower nut (6), push rod upper cap nut (7), drag hook valve stem seal (8), push rod lower nut (9), pneumatic valve rod nut (10), drag hook dunnage (11), drag hook pneumatic spring (12), cylinder seal circle (13), cylinder upper cover (14), pneumatic pipeline (15), cylinder (16), drag hook valve rod the second seal ring (17), four-way change-over valve (18), drag hook valve rod the 3rd seal ring (19), cylinder the first seal ring (20), cylinder the second seal ring (21), drag hook valve rod (22), pneumatic valve rod upper spring (23), pneumatic valve rod (24), pneumatic valve rod lower spring (25), air cylinder base (26), heat insulating washer (27), pneumatic actuator bolt and nut (28) forms, selfsealings main valve comprises valve body under main valve (29), main valve lower valve core seal ring (30), main valve lower valve core (31), main valve seal ring (32), main valve lower valve core spring (33), main valve flicks application cylinder (34), main valve valve seat (35), main valve valve seat insert (36), main valve control spring (37), main valve is controlled ball (38), main valve upper valve core seal ring (39), main valve upper valve core (40), main valve upper valve core spring (41), main valve upper valve core bearing (42), main valve upper valve body (43), it is characterized in that: pneumatic actuator is installed on main valve and flicks on application cylinder (34) bottom disc type edge, the middle heat insulating washer (27) of installing, heat insulating washer (27) connects air cylinder base (26) by pneumatic actuator bolt and nut (28), air cylinder base (26) is threaded connection cylinder (16), cylinder (16) top is threaded connection cylinder upper cover (14), cylinder seal circle (13) is installed on cylinder upper cover (14) axial seal face, pneumatic pipeline (15) is installed in cylinder (16) side, and four-way change-over valve (18) is installed at pneumatic pipeline (15) middle part, pneumatic pipeline (15) top connects cylinder (16) top cylinder, and bottom connects cylinder (16) bottomed cylinder, pneumatic valve rod (24) is installed in cylinder (16), and pneumatic valve rod lower spring (25) is installed in pneumatic valve rod (24) bottom, and middle part outer surface is installed pneumatic valve rod upper spring (23), pneumatic valve rod (24) is hollow structure, and drag hook valve rod (22) is installed at center, and drag hook valve rod (22) lower side is installed drag hook valve rod the second seal ring (17) and drag hook valve rod the 3rd seal ring (19), drag hook valve rod (22) and the middle drag hook pneumatic spring (12) of installing of pneumatic valve rod (24), pneumatic valve rod (24) top is through the rear drag hook supporting plate (11) of installing in cylinder upper cover (14) middle part, then it is fastening to pass through pneumatic valve rod nut (10), drag hook dunnage (11) is installed U-shaped drag hook (3) by the side of turning up, drag hook dunnage (11) is upper by push rod upper cap nut (7), push rod lower nut (9) fixed installation push rod (2), and elasticity top cover (1) is installed at push rod (2) top, drag hook valve rod (22) top fixedly mounts U-shaped groove (5) by U-shaped groove upper cap nut (4) and U-shaped groove lower nut (6), one end, drag hook (3) bottom is installed on U-shaped groove (5) opening, and main valve upper valve body (43) disc edge is hooked at top, main valve upper valve core (40) is installed at main valve upper valve body (43) middle part, upper main valve upper valve core seal ring (39) and the main valve upper valve core spring (41) installed of main valve upper valve core (40), main valve lower valve core (31) is installed at valve body under main valve (29) middle part, and main valve lower valve core seal ring (30) is installed in main valve lower valve core (31) bottom, valve body under main valve (29) top is threaded connection main valve valve seat (35), and thread bottom is installed main valve seal ring (32), the outer main valve of installing of main valve valve seat (35) flicks application cylinder (34), main valve is round barrel shape in the middle of flicking application cylinder (34), and bottom is ring, in the ring plane of bottom, with medial axis symmetric array, a plurality of pneumatic actuators is installed, main valve control spring (37) is installed on main valve valve seat (35) and main valve flicks between application cylinder (34), valve body (29) top edge under bottom contact main valve, main valve lower valve core spring (33) is installed between valve body under main valve (29) and main valve lower valve core (31), main valve control ball (38) is installed on main valve valve seat (35) and main valve flicks between application cylinder (34), radially trace movement, main valve upper valve core spring (41) is installed between main valve upper valve core (40) and main valve upper valve core bearing (42).
Pneumatic valve rod (24) is hollow T-shape structure; Pneumatic valve rod (24) is divided into high and low pressure area by cylinder (16), and high and low pressure area can regulate conversion according to four-way change-over valve (18) and pneumatic pipeline (15) change airflow direction; T-shape pneumatic valve rod (24) is installed respectively pneumatic valve rod upper spring (23), pneumatic valve rod lower spring (25) up and down, and pneumatic valve rod upper spring (23), pneumatic valve rod lower spring (25) diameter is identical and be all installed in cylinder (16).
Drag hook valve rod (22) is T-shape structure, stands upside down and is installed in the middle of pneumatic valve rod (24), through pneumatic valve rod (24) top; On drag hook valve rod (22) T-shape platform, drag hook pneumatic spring (12) is installed, drag hook pneumatic spring (12) is positioned between pneumatic valve rod (24) and drag hook valve rod (22).
Pneumatic valve rod (24) top has vent, and vent and drag hook pneumatic spring (12) place cavity are connected.
Pneumatic actuator quantity can be according to actual needs and pneumatic control pressure, the required connection pulling force of main valve size be arranged at main valve to flick application cylinder (34) upper, and arrange around main valve axis.
During low temperature liquid nitrogen filling, pressurized gas enter cylinder (16) middle part by pneumatic pipeline (15), promote pneumatic valve rod (24) and move downward, and meanwhile, pneumatic valve rod upper spring (23) promotes pneumatic valve rod (24) and moves downward; Cylinder (16) bottom pressurized gas become low-pressure gas by upper connection after four-way change-over valve (18) changes gas circuit of pneumatic pipeline (15); Drag hook pneumatic spring (12) promotes drag hook valve rod (22) and moves downward, and drag hook valve rod (22) drives U-shaped groove (5) to move downward; U-shaped groove (5) drives drag hook (3) to middle shaft rotation, and hooks main valve upper valve body (43); Drag hook (3) pulls main valve upper valve body (43) to move downward by pulling main valve to flick application cylinder (34), after main valve control ball (38) radially moves, buckle into main valve upper valve body (43) groove locking, main valve flick application cylinder (34) relatively main valve valve seat (35) move upward and fastening main valve is controlled ball (38); Main valve upper valve body (43) promotes main valve lower valve core (31) downwards by main valve upper valve core (40), compression main valve lower valve core spring (33) moves downward, upwards promote the relative main valve upper valve body (43) of main valve upper valve core (40) simultaneously and move upward, open main valve fluid and import and export upper lower channel.
When low temperature liquid nitrogen cuts off, pressurized gas enter cylinder (16) bottom by pneumatic pipeline (15), promotion drag hook valve rod (22), pneumatic valve rod (24) move upward, drag hook valve rod (22) compresses drag hook pneumatic spring (12), drives U-shaped groove (5) to move upward, U-shaped groove (5) drives drag hook (3) to inner rotary, and throws off with main valve upper valve body (43); Pneumatic valve rod (24) drives push rod (2) to move upward and passes through elasticity top cover and promotes main valve upper valve body (43), by operating to the thrust of main valve upper valve body (43), promote main valve flick application cylinder (34) relatively main valve valve seat (35) move downward, main valve is controlled radially reverse motions lock main valve and flick application cylinder (34) of ball (38); Main valve upper valve body (43) by main valve lower valve core spring (33) effect by upwards promoting main valve lower valve core (31), main valve lower valve core (31), upwards promote main valve upper valve core (40), main valve upper valve core (40) upwards promotes main valve upper valve body (43) and moves upward, and departs from main valve valve seat (35); After main valve lower valve core (31) moves upward, by valve body (29) sealing under main valve lower valve core seal ring (30) and main valve; Main valve upper valve core (40) relatively main valve upper valve body (43) moves downward, by main valve upper valve core seal ring (39) and main valve upper valve body (43) sealing; Now main valve two ends fluid disconnects, and under main valve upper valve body (43) and main valve, valve body (29) departs from, and sealing is realized at two ends separately.
The Principle Problems that scheme is related:
The present invention relates to the basic principles such as selfsealings control principle, pneumatic control principle, four-way reversing principle.Under-197 ℃ of worst cold cases, in low temperature liquid nitrogen filling process, fill adapter two ends temperature is very low, can not carry out manually-operable, needs on the one hand the fluid after filling can not overflow in environment, in order to avoid cause Cryogenic burns, therefore need fluid two end connectors after filling can after filling, realize selfsealings.On the other hand, in filling process, contact-segment temperature is extremely low, can not manually-operable plug connection, in order to avoid cause Cryogenic burns, needs automatic control process to realize and automatically controls break-make.The present invention, according to Pneumatic automatic control principle invention pneumatic actuator, in conjunction with selfsealings fill adapter basic structure form, has invented the ultralow temperature selfsealings fill valve with pneumatic control, can solve the automatic control filling problem of cryogen.Selfsealings process relies on two ends self-sealing joint to realize, automatic control process relies on pneumatic actuator to realize, high low pressure gas commutation process relies on four-way change-over valve to realize, thereby realizes generally automatic control filling and the auto switching control procedure of ultra-low temperature liquid nitrogen.Concrete principle is as follows: during low temperature liquid nitrogen filling, pressurized gas enter cylinder (16) middle part by pneumatic pipeline (15), promotes pneumatic valve rod (24) and moves downward, and meanwhile, pneumatic valve rod upper spring (23) promotes pneumatic valve rod (24) and moves downward; Cylinder (16) bottom pressurized gas become low-pressure gas by upper connection after four-way change-over valve (18) changes gas circuit of pneumatic pipeline (15); Drag hook pneumatic spring (12) promotes drag hook valve rod (22) and moves downward, and drag hook valve rod (22) drives U-shaped groove (5) to move downward; U-shaped groove (5) drives drag hook (3) to middle shaft rotation, and hooks main valve upper valve body (43); Drag hook (3) pulls main valve upper valve body (43) to move downward by pulling main valve to flick application cylinder (34), after main valve control ball (38) radially moves, buckle into main valve upper valve body (43) groove locking, main valve flick application cylinder (34) relatively main valve valve seat (35) move upward and fastening main valve is controlled ball (38); Main valve upper valve body (43) promotes main valve lower valve core (31) downwards by main valve upper valve core (40), compression main valve lower valve core spring (33) moves downward, upwards promote the relative main valve upper valve body (43) of main valve upper valve core (40) moves upward simultaneously, open main valve fluid and import and export lower channel, realize the low temperature liquid nitrogen connection of annotating from bottom to top.When low temperature liquid nitrogen cuts off, pressurized gas enter cylinder (16) bottom by pneumatic pipeline (15), promotion drag hook valve rod (22), pneumatic valve rod (24) move upward, drag hook valve rod (22) compresses drag hook pneumatic spring (12), drives U-shaped groove (5) to move upward, U-shaped groove (5) drives drag hook (3) to inner rotary, and throws off with main valve upper valve body (43); Pneumatic valve rod (24) drives push rod (2) to move upward and passes through elasticity top cover and promotes main valve upper valve body (43), by operating to the thrust of main valve upper valve body (43), promote main valve flick application cylinder (34) relatively main valve valve seat (35) move downward, main valve is controlled radially reverse motions lock main valve and flick application cylinder (34) of ball (38); Main valve upper valve body (43) by main valve lower valve core spring (33) effect by upwards promoting main valve lower valve core (31), main valve lower valve core (31), upwards promote main valve upper valve core (40), main valve upper valve core (40) upwards promotes main valve upper valve body (43) and moves upward, and departs from main valve valve seat (35); After main valve lower valve core (31) moves upward, by valve body (29) sealing under main valve lower valve core seal ring (30) and main valve; Main valve upper valve core (40) relatively main valve upper valve body (43) moves downward, by main valve upper valve core seal ring (39) and main valve upper valve body (43) sealing; Now main valve two ends fluid disconnects, and under main valve upper valve body (43) and main valve, valve body (29) departs from, and sealing is realized at two ends separately, completes the whole filling process of low temperature liquid nitrogen.This technology not only can be used for the filling process of low temperature liquid nitrogen, also can be used for the automatic filling process of other ultralow temperature fluid, or the automatic control filling process of other high temperature fluid.
Technical characterstic of the present invention:
The present invention can realize the pneumatic control selfsealings filling process of low temperature liquid nitrogen, and in filling process, cryogen can not overflowed pipeline, can realize pneumatic control process, can stop at any time filling, without manually-operable.In filling process, only need to be by fill adapter near the low temperature liquid nitrogen that needs filling, pneumatic actuator just can pull fill adapter automatically, and joint is pulled to on positi conducting locking, after having annotated, can automatically open fill valve, realize two-way selfsealings, can not cause the problems such as splash of low temperature liquid nitrogen in filling process, filling process is safe and reliable, facilitate durable, without manual control, without electronic control, only need pneumatic control, the selfsealings automatic filling process that not only can be used for low temperature liquid nitrogen, and can be used for other normal temperature fluid, high temperature fluid, combustible fluid, harmful fluids, the self-sealing pneumatic of toxicity fluid is controlled filling process, realize the selfsealings filling process of special extreme fluid.
Accompanying drawing explanation
Figure 1 shows that critical piece and the mounting point relation of the quick selfsealings fill valve of pneumatic control for low temperature liquid nitrogen.
Embodiment
By the quick selfsealings fill valve access of pneumatic control low temperature liquid nitrogen supply system for low temperature liquid nitrogen, be about to valve body (29) bottom and be threaded connection liquid nitrogen distribution supply pipeline, main valve upper valve body (43) is installed on to the equipment that needs supply, and connects by telescopic cryogenic piping.
During low temperature liquid nitrogen filling, by being installed on by main valve upper valve body (43) import of filing provision, moving to position, main valve dead ahead and insert gently valve seat (35).
Open four-way change-over valve, pressurized gas enter cylinder (16) middle part by pneumatic pipeline (15), promote pneumatic valve rod (24) and move downward, and meanwhile, pneumatic valve rod upper spring (23) promotes pneumatic valve rod (24) and moves downward; Cylinder (16) bottom gas becomes cryogenic gas by upper four-way change-over valve (18) the change gas circuit that connects of pneumatic pipeline (15), and pneumatic spring (12) promotes drag hook valve rod (22) and moves downward, drives U-shaped groove (5) to move downward; U-shaped groove (5) drives drag hook (3) inwardly to rotate, and hooks main valve upper valve body (43); Drag hook (3) pulls main valve upper valve body (43) to move downward by pulling main valve to flick application cylinder (34), after main valve control ball (38) radially moves, buckles into main valve upper valve body (43) groove locking; Main valve upper valve body (43) promotes main valve lower valve core (31) downwards by main valve upper valve core (40), compression main valve lower valve core spring (33), upwards promote the relative main valve upper valve body (43) of main valve upper valve core (40) and move upward, open main valve fluid and import and export passage, liquid nitrogen starts filling.
When liquid nitrogen needs to cut off after filling it up with, open four-way change-over valve commutation function, pressurized gas are squeezed into cylinder (16) bottom by pneumatic pipeline (15), promote drag hook valve rod (22), pneumatic valve rod (24) moves upward, drag hook valve rod (22) compression drag hook pneumatic spring (12), drive U-shaped groove (5) to move upward, U-shaped groove (5) drives drag hook (3) to inner rotary, and throw off with main valve upper valve body (43), push rod (2) continues to move upward, and promote main valve upper valve body (43) by elasticity top cover, by operating to the thrust of main valve upper valve body (43), promotion main valve flicks application cylinder (34) and moves downward, main valve is controlled radially reverse motions of ball (38), main valve upper valve body (43) by main valve lower valve core spring (33) effect by upwards promoting main valve lower valve core (31), main valve lower valve core (31), upwards promote main valve upper valve core (40), main valve upper valve core (40) upwards promotes main valve upper valve body (43) motion, departs from main valve valve seat (35), after main valve lower valve core (31) moves upward, by valve body (29) sealing under main valve lower valve core seal ring (30) and main valve, main valve upper valve core (40) relatively main valve upper valve body (43) moves downward, by main valve upper valve core seal ring (39) and main valve upper valve body (43) sealing, now main valve two ends liquid nitrogen disconnects, and under main valve upper valve body (43) and main valve, valve body (29) departs from, and sealing is realized at two ends separately, and liquid nitrogen filling is complete.
Claims (5)
1. the quick selfsealings fill valve of pneumatic control for low temperature liquid nitrogen, comprises pneumatic actuator, selfsealings main valve two-part, described pneumatic actuator comprises top cover (1), push rod (2), drag hook (3), U-shaped groove upper cap nut (4), U-shaped groove (5), U-shaped groove lower nut (6), push rod upper cap nut (7), drag hook valve stem seal (8), push rod lower nut (9), pneumatic valve rod nut (10), drag hook dunnage (11), drag hook pneumatic spring (12), cylinder seal circle (13), cylinder upper cover (14), pneumatic pipeline (15), cylinder (16), drag hook valve rod the second seal ring (17), four-way change-over valve (18), drag hook valve rod the 3rd seal ring (19), cylinder the first seal ring (20), cylinder the second seal ring (21), drag hook valve rod (22), pneumatic valve rod upper spring (23), pneumatic valve rod (24), pneumatic valve rod lower spring (25), air cylinder base (26), heat insulating washer (27), pneumatic actuator bolt and nut (28) forms, selfsealings main valve comprises valve body under main valve (29), main valve lower valve core seal ring (30), main valve lower valve core (31), main valve seal ring (32), main valve lower valve core spring (33), main valve flicks application cylinder (34), main valve valve seat (35), main valve valve seat insert (36), main valve control spring (37), main valve is controlled ball (38), main valve upper valve core seal ring (39), main valve upper valve core (40), main valve upper valve core spring (41), main valve upper valve core bearing (42), main valve upper valve body (43), it is characterized in that: pneumatic actuator is installed on main valve and flicks on application cylinder (34) bottom disc type edge, the middle heat insulating washer (27) of installing, heat insulating washer (27) connects air cylinder base (26) by pneumatic actuator bolt and nut (28), air cylinder base (26) is threaded connection cylinder (16), cylinder (16) top is threaded connection cylinder upper cover (14), cylinder seal circle (13) is installed on cylinder upper cover (14) axial seal face, pneumatic pipeline (15) is installed in cylinder (16) side, and four-way change-over valve (18) is installed at pneumatic pipeline (15) middle part, pneumatic pipeline (15) top connects cylinder (16) top cylinder, and bottom connects cylinder (16) bottomed cylinder, pneumatic valve rod (24) is installed in cylinder (16), and pneumatic valve rod lower spring (25) is installed in pneumatic valve rod (24) bottom, and middle part outer surface is installed pneumatic valve rod upper spring (23), pneumatic valve rod (24) is hollow structure, and drag hook valve rod (22) is installed at center, and drag hook valve rod (22) lower side is installed drag hook valve rod the second seal ring (17) and drag hook valve rod the 3rd seal ring (19), drag hook valve rod (22) and the middle drag hook pneumatic spring (12) of installing of pneumatic valve rod (24), pneumatic valve rod (24) top is through the rear drag hook supporting plate (11) of installing in cylinder upper cover (14) middle part, then it is fastening to pass through pneumatic valve rod nut (10), drag hook dunnage (11) is installed U-shaped drag hook (3) by the side of turning up, drag hook dunnage (11) is upper by push rod upper cap nut (7), push rod lower nut (9) fixed installation push rod (2), and elasticity top cover (1) is installed at push rod (2) top, drag hook valve rod (22) top fixedly mounts U-shaped groove (5) by U-shaped groove upper cap nut (4) and U-shaped groove lower nut (6), one end, drag hook (3) bottom is installed on U-shaped groove (5) opening, and main valve upper valve body (43) disc edge is hooked at top, main valve upper valve core (40) is installed at main valve upper valve body (43) middle part, upper main valve upper valve core seal ring (39) and the main valve upper valve core spring (41) installed of main valve upper valve core (40), main valve lower valve core (31) is installed at valve body under main valve (29) middle part, and main valve lower valve core seal ring (30) is installed in main valve lower valve core (31) bottom, valve body under main valve (29) top is threaded connection main valve valve seat (35), and thread bottom is installed main valve seal ring (32), the outer main valve of installing of main valve valve seat (35) flicks application cylinder (34), main valve is round barrel shape in the middle of flicking application cylinder (34), and bottom is ring, in the ring plane of bottom, with medial axis symmetric array, a plurality of pneumatic actuators is installed, main valve control spring (37) is installed on main valve valve seat (35) and main valve flicks between application cylinder (34), valve body (29) top edge under bottom contact main valve, main valve lower valve core spring (33) is installed between valve body under main valve (29) and main valve lower valve core (31), main valve control ball (38) is installed on main valve valve seat (35) and main valve flicks between application cylinder (34), radially trace movement, main valve upper valve core spring (41) is installed between main valve upper valve core (40) and main valve upper valve core bearing (42).
2. according to claim
1the quick selfsealings fill valve of pneumatic control for described low temperature liquid nitrogen, is characterized in that: pneumatic valve rod (24) is hollow T-shape structure; Pneumatic valve rod (24) is divided into high and low pressure area by cylinder (16), and high and low pressure area can regulate conversion according to four-way change-over valve (18) and pneumatic pipeline (15) change airflow direction; T-shape pneumatic valve rod (24) is installed respectively pneumatic valve rod upper spring (23), pneumatic valve rod lower spring (25) up and down, and pneumatic valve rod upper spring (23), pneumatic valve rod lower spring (25) diameter is identical and be all installed in cylinder (16).
3. according to claim
1the quick selfsealings fill valve of pneumatic control for described low temperature liquid nitrogen, is characterized in that: drag hook valve rod (22) is T-shape structure, stands upside down and is installed in the middle of pneumatic valve rod (24), through pneumatic valve rod (24) top; On drag hook valve rod (22) T-shape platform, drag hook pneumatic spring (12) is installed, drag hook pneumatic spring (12) is positioned between pneumatic valve rod (24) and drag hook valve rod (22).
4. according to claim
1the quick selfsealings fill valve of pneumatic control for described low temperature liquid nitrogen, is characterized in that: pneumatic valve rod (24) top has vent, and vent and drag hook pneumatic spring (12) place cavity are connected.
5. according to claim
1the quick selfsealings fill valve of pneumatic control for described low temperature liquid nitrogen, it is characterized in that: pneumatic actuator quantity can be according to actual needs and pneumatic control pressure, the required connection pulling force of main valve size be arranged at main valve to flick application cylinder (34) upper, and arrange around main valve axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310570841.1A CN103644353A (en) | 2013-11-17 | 2013-11-17 | Quick pneumatic control self-sealing filling valve for low-temperature liquid nitrogen |
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| CN201310570841.1A CN103644353A (en) | 2013-11-17 | 2013-11-17 | Quick pneumatic control self-sealing filling valve for low-temperature liquid nitrogen |
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| CN103644353A true CN103644353A (en) | 2014-03-19 |
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| CN201310570841.1A Pending CN103644353A (en) | 2013-11-17 | 2013-11-17 | Quick pneumatic control self-sealing filling valve for low-temperature liquid nitrogen |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106090371A (en) * | 2016-08-24 | 2016-11-09 | 航宇救生装备有限公司 | A kind of separate type anti-drowning valve |
| CN111853341A (en) * | 2020-07-24 | 2020-10-30 | 浙江大学 | Filler self-sealing assembly used under ultralow temperature working condition and method thereof |
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| US6659420B2 (en) * | 2002-03-21 | 2003-12-09 | Tsang-Chang Hwang | Manual and automatic flow control valve |
| CN101509586A (en) * | 2009-03-26 | 2009-08-19 | 北京航天发射技术研究所 | Rapidly connecting and separating type gas path plug-in unit connector |
| CN101828061A (en) * | 2007-09-07 | 2010-09-08 | 麦克罗西斯科技有限公司 | Gas valve with high speed opening and high speed gas flow capability |
| CN102454811A (en) * | 2011-10-06 | 2012-05-16 | 张周卫 | Pipeline built-in decompressing throttling valve for low-temperature system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6659420B2 (en) * | 2002-03-21 | 2003-12-09 | Tsang-Chang Hwang | Manual and automatic flow control valve |
| CN101828061A (en) * | 2007-09-07 | 2010-09-08 | 麦克罗西斯科技有限公司 | Gas valve with high speed opening and high speed gas flow capability |
| CN101509586A (en) * | 2009-03-26 | 2009-08-19 | 北京航天发射技术研究所 | Rapidly connecting and separating type gas path plug-in unit connector |
| CN102454811A (en) * | 2011-10-06 | 2012-05-16 | 张周卫 | Pipeline built-in decompressing throttling valve for low-temperature system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106090371A (en) * | 2016-08-24 | 2016-11-09 | 航宇救生装备有限公司 | A kind of separate type anti-drowning valve |
| CN111853341A (en) * | 2020-07-24 | 2020-10-30 | 浙江大学 | Filler self-sealing assembly used under ultralow temperature working condition and method thereof |
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Application publication date: 20140319 |