CN114110179A - High-pressure oxygen switch for preventing impact of micro-particles - Google Patents
High-pressure oxygen switch for preventing impact of micro-particles Download PDFInfo
- Publication number
- CN114110179A CN114110179A CN202111493665.7A CN202111493665A CN114110179A CN 114110179 A CN114110179 A CN 114110179A CN 202111493665 A CN202111493665 A CN 202111493665A CN 114110179 A CN114110179 A CN 114110179A
- Authority
- CN
- China
- Prior art keywords
- valve
- rod
- nut
- pressure oxygen
- shell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 52
- 239000001301 oxygen Substances 0.000 title claims abstract description 52
- 239000011859 microparticle Substances 0.000 title abstract description 5
- 239000002184 metal Substances 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims description 33
- 239000013618 particulate matter Substances 0.000 claims description 6
- 230000033001 locomotion Effects 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 2
- 229910052755 nonmetal Inorganic materials 0.000 abstract description 12
- 238000002309 gasification Methods 0.000 abstract description 6
- 239000002245 particle Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 6
- 239000012535 impurity Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 229910001369 Brass Inorganic materials 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 229920002493 poly(chlorotrifluoroethylene) Polymers 0.000 description 2
- -1 polychlorotrifluoroethylene Polymers 0.000 description 2
- 239000005023 polychlorotrifluoroethylene (PCTFE) polymer Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Images
Classifications
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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
- F16K1/02—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 with screw-spindle
-
- 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
-
- 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
-
- 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
- F16K1/42—Valve seats
-
- 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
-
- 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
- F16K31/44—Mechanical actuating means
- F16K31/60—Handles
-
- 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
- F16K41/00—Spindle sealings
- F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
- F16K41/06—Spindle sealings with stuffing-box ; Sealing rings with at least one ring attached to both spindle and housing
Abstract
The invention belongs to the field of aircraft oxygen generation, and particularly relates to a high-pressure oxygen switch capable of preventing impact of micro-particles. The method comprises the following steps: the air inlet of the air inlet is provided with an annular boss from the inner wall to the outside, the valve pad (10) is arranged on the outer side of the annular boss of the air inlet, the lower end face of the valve (8) is tightly pressed and sealed with the valve pad (10), the locking ring (9) is further arranged on the outer side of the lower end of the valve (8), the locking ring is in threaded connection with the inner wall of the shell (11) to tightly press the valve pad (10), and the valve (8) and the shell (11) are made of metal. Can realize that high-pressure oxygen among the oxygen system opens and closes, can avoid the particle impact nonmetal valve mat in the system and the conflagration or the gasification trouble that produces.
Description
Technical Field
The invention belongs to the field of aircraft oxygen generation, and particularly relates to a high-pressure oxygen switch capable of preventing impact of micro-particles.
Technical Field
The high-pressure oxygen switch is mainly applied to an oxygen system and an oxygen supplementing system of an airplane and mainly comprises a hand wheel, a rod assembly, a valve assembly, a sealing gasket, a main body and the like. The existing high-pressure oxygen switch adopts a structure that a valve directly faces high-pressure airflow, most valve cushions are made of polychlorotrifluoroethylene bar materials, and the high-pressure oxygen is instantaneously impacted, so that the problems of flammability, explosiveness and the like exist. The oxygen switch adopting the metal valve gasket can avoid flammability and explosiveness, but simultaneously brings the problems of poor sealing performance, high sealing torque and the like of the metal valve.
Disclosure of Invention
The purpose of the invention is: a high-pressure oxygen switch for preventing impact of micro-particles is provided.
The technical scheme of the invention is as follows:
a high pressure oxygen switch protected from impact by particulate matter, comprising: the valve 8 is arranged in the shell 11 and is in clearance fit with the shell 11, the upper end of the valve 8 is fixedly connected with the lower end of the rotating mechanism, an annular boss outwards from the inner wall is arranged at the air inlet, the valve pad 10 is arranged on the outer side of the annular boss of the air inlet, the lower end face of the valve 8 is tightly pressed and sealed with the valve pad 10, the locking ring 9 is further arranged on the outer side of the lower end of the valve 8, the locking ring is in threaded connection with the inner wall of the shell 11 to tightly press the valve pad 10, and the valve 8 and the shell 11 are made of metal.
Further, a portion of the case 11 contacting the lower end of the shutter pad 10 is provided with a triangular ring groove.
Further, a portion of the case 11 contacting the lower end of the shutter pad 10 is provided with a semicircular convex ring.
Further, the rotating mechanism includes: hand wheel assembly 1, the pole 2, the nut 4, the pin 5, rotor 6, rotor 7, wherein, nut 4 and 11 upper end threaded connection of casing, hand wheel assembly 1 fixes in 2 upper ends of pole, pole 2 is installed in nut 4 and with 4 clearance fit of nut, 2 lower extremes of pole are provided with radial outside annular boss, 4 inner walls of nut are provided with the step, the annular boss of 2 lower extremes of pole is used for restricting 2 upward movements of pole with the step cooperation of 4 inner walls of nut, 2 terminal surface is provided with the recess under the pole, rotor 6 upper portion sets up in the recess of 2 terminal surface under the pole and fixes through pin 5, rotor 7 and 11 inner wall threaded connection of casing, rotor 7 up end is provided with the recess, rotor 6 lower part sets up the motion that is used for driving rotor 7 in the recess of rotor 7 up end.
Further, at least two sealing rings 3 are arranged between the rod 2 and the nut 4.
Furthermore, a compression sealing gasket 13 is arranged at the matching position of the annular boss at the lower end of the rod 2 and the step on the inner wall of the screw cap 4.
Further, an annular boss at the lower end of the rod 2 is line-sealed with the packing 13.
Further, still include: and the lock nut 12 is in threaded connection with the outer wall of the shell 11 and is used for locking the lock nut 4.
The invention has the advantages that: under the sealed condition of using nonmetal valve pad and metal valve, avoided high-speed air current directly to blow the nonmetal valve surface, the casing has loudspeaker form diffusion mouth, can reduce because the static gathering that the nonmetal surface of high-speed air current friction brought, avoids striking at nonmetal surface along with the particulate matter impurity that oxygen flows, arouses nonmetal gasification or burning. The high-pressure oxygen in an oxygen supply system (including an oxygen supplementing system) with the pressure of 15MPa can be turned on and turned off, and fire or gasification faults caused by impact of particles in the system on a nonmetal valve pad can be avoided.
Drawings
Fig. 1 is a sectional view of a high pressure oxygen switch of the present invention.
Fig. 2 is a partial sectional view of the shutter.
The device comprises a hand wheel 1, a rod 2, a sealing ring 3, a nut 4, a pin 5, a transmission piece 6, a rotor 7, a valve 8, a locking ring 9, a valve pad 10, a shell 11, a locking nut 12, a sealing pad 13, a spring washer 14 and a screw 15.
Detailed Description
The application provides a novel switch structure, makes nonmetal valve pad not receive high-pressure oxygen's blowing in work, has avoided because conflagration or gasification disaster that transient high-pressure oxygen and granule impact lead to, has also avoided adopting the gas tightness decline that metal valve pad brought simultaneously to close the adverse effect that moment rises.
The high pressure oxygen switch of the present invention will be further described with reference to the accompanying drawings in conjunction with the specific embodiments.
Fig. 1 is a sectional view of a high pressure oxygen switch according to the present invention, and as shown in fig. 1, the oxygen switch includes a hand wheel 1, a rod 2, a sealing ring 3, a nut 4, a pin 5, a driving plate 6, a rotor 7, a shutter 8, a locking ring 9, a shutter pad 10, a housing 11, a locking nut 12, a sealing pad 13, a spring washer 14, and a screw 15, wherein the hand wheel 1 is fixed to the rod 3 by the screw 15 and the spring washer 14, the hand wheel and the rod fix the nut 4 and realize dynamic sealing by the sealing ring 3 and the sealing pad 13, and the hand wheel and the rod can rotate axially along the center of the part. The rod is provided with two symmetrical holes for fixing a rotating sheet 6 by a pin 5, angular displacement can be transmitted to a rotating body 7 when the hand wheel rotates, the rotating body is fixed on a shell 11 through threads, and the rotating body can drive a valve 8 to move up and down along with rotation. The valve is matched and sealed with a valve pad 10, and the valve pad 10 is locked and sealed with the threads on the shell through a locking ring 9. The screw cap of the oxygen switch is fixedly connected with the shell through threads, sealed through a compression sealing gasket 13, and prevented from loosening through a locking screw cap 12.
Referring to fig. 1-2, 2 sealing rings 3 are sleeved on two annular grooves of the rod 2, a driving plate 6 is arranged in the groove at the lower end of the rod 2, and the driving plate 6 and the rod 5 are fixed by a pin 5 penetrating through a small hole of the rod 2 and a small hole of the driving plate 6, so as to form a rod assembly.
The upper end of the assembled rod assembly sequentially passes through an inner hole of a sealing ring 3 and an inner hole of a screw cap 4, the sealing ring 3 is tightly attached to the screw cap 4, and the upper end of the rod 2 is provided with a square step with internal threads; a metal bushing is arranged inside the hand wheel 2, the bushing is made of phenolic plastics, a square inner hole is formed in the bushing, the square inner hole of the hand wheel 2 and a square step of the rod 2 are assembled together and screwed on an inner thread of the rod 2 through a thread of a screw 15, the hand wheel 1, the nut 4, the rod 2 and the sealing ring 3 are installed together, the hand wheel 1 can rotate in the nut 4, and the spring washer 14 plays a role in preventing looseness of the thread. The upper plane of the lower end of the rod 2 is provided with a circle of annular bosses which can be tightly pressed on the sealing gasket 13 when the part is tightly arranged on the screw cap 4 to form sealing, so that high-pressure gas in the product is prevented from escaping from a gap between the rod 2 and the screw cap 4. The two sealing rings 3 are tightly pressed by the rod 2 and the nut 4, so that the sealing rings 3 deform, a gap between the rod 2 and the nut 4 is filled, another seal is formed, and high-pressure gas in a product is further prevented from escaping.
The valve gasket 10 is installed at the annular boss of the air inlet inside the shell 11 through an inner hole of the valve gasket 10, the locking ring 9 is installed on the inner thread of the shell 11 through an outer thread of the locking ring 9, the valve gasket 10 can be tightly pressed on the inner bottom surface of the shell 11 through rotating the locking ring 9, the nonmetal valve gasket 10 is extruded, the valve gasket 10 forms a seal at the position of a circle of triangular seal groove on the inner bottom surface of the shell 11, and high-pressure gas is prevented from flowing out from a gap between the valve gasket 10 and the inner portion of the shell 11.
A valve seat opening with a round angle on the valve 8 is tightly pressed and sealed with the non-metal valve gasket 3, and is in a sealing state; the shutter is movable, and when the shutter leaves the shutter pad, the product is in an open state. When opening the oxygen switch, what high-pressure oxygen directly blown and assaulted is the metal valve, avoids directly blowing and assaulting the nonmetal surface, can effectively avoid impacting at the nonmetal surface along with high-speed particulate matter impurity that high-pressure oxygen flows in, arouses the burning gasification of valve pad.
The valve 8 is made of brass, a round blind hole is formed in the seat opening, and the valve can be impacted by impurities in oxygen without burning and has good safety.
The upper part of the valve 8 is provided with a groove which is fixed with a lower end boss of the rotor 7, and the valve 8 is fixed with an inner thread of the shell 11 through an outer thread of the valve 8. The rotating sheet 6 is arranged in a groove at the upper part of the rotating body 7. The nut 4 is installed on the external thread of the shell 11 through the internal thread, and the nut and the external thread compress the sealing gasket 13 after being screwed tightly, so that the sealing gasket 13 deforms at the V-shaped sealing groove of the upper end surface of the shell to form a seal, and high-pressure gas in the product is prevented from escaping from the gap between the nut 4 and the shell 11. The lock nut 12 is connected with the external thread of the shell 11 through the internal thread, and after the nut 4 is fastened with the shell 11, the lock nut 12 is screwed on the lower plane of the nut 4, so that the looseness prevention of the nut 4 and the shell 11 is realized.
The valve pad 3 is connected and pressed with the threads of the shell 11 by using the locking ring 9, and the gap between the valve pad and the shell can be sealed by the sealing groove while the valve pad is fixed, so that good channel sealing performance of a product is ensured when the product is closed.
Valve pad 3 is the polychlorotrifluoroethylene material, compares metal valve pad, and its sealing performance is good, and required closing moment is little, and processing technology is simple, can not burn in oxygen, but probably gasifies under the impact of metal particulate matter along with high-speed oxygen gas flow. Therefore, in the product, as can be seen from fig. 2, the valve 8 replaces the valve cushion to be directly blown by high-speed oxygen, metal particles can collide in the blind hole of the valve, the speed is reduced, the energy is reduced, and the valve cushion can not be directly blown by moving air flow, so that the gasification of the valve cushion is avoided.
The housing 11 is fixed to the shutter pad 10 by a locking ring 9 having a mounting hole, as shown in fig. 2. The locking ring is provided with external threads, the shell is provided with internal threads, the locking ring is rotated through the tool, the valve gasket is compressed, certain deformation is generated at the position of the sealing groove of the shell by the valve gasket, and a good sealing structure is formed. When the oxygen switch is opened, oxygen enters through the channel of the shell, and the inner wall of the valve pad is prevented from being rubbed by high-speed oxygen and impurities.
The working principle is as follows: when the oxygen switch is in a closed state, the valve 9 presses on the valve pad 10 to form a sealing surface to prevent high-pressure oxygen from entering the interior of the housing 11 and an outlet, and a gap between the valve pad and the housing 11 presses the valve pad 10 through the locking ring 8 and the threads of the housing 11 and is sealed through a sealing groove on the housing to prevent high-pressure gas from leaking into the interior of the housing from the gap of the valve pad 10.
When the oxygen switch is turned on, the hand wheel 1 rotates leftwards to drive the screw rod 2 arranged on the hand wheel to rotate, and the driving sheet 6 arranged on the screw rod 2 rotates along with the screw rod. The rotor 6 is arranged in the groove of the rotor, and the rotor 7 is driven when the rotor 6 rotates. Because the rotator 7 is connected with the shell 11 through threads, when the rotator 7 rotates leftwards, the rotator 7 moves upwards at the same time, and drives the valve 9 mounted on the rotator to move upwards to leave the valve pad. High-pressure oxygen enters the shell from a horn-shaped outlet of the shell 11, blows into an inner hole of the valve 9, and enters the shell 11 from a gap between the valve 9 and the valve pad 10 to the outlet after being buffered.
Claims (8)
1. A high pressure oxygen switch for preventing impact of particulate matter, comprising: the air inlet of the air inlet is provided with an annular boss from the inner wall to the outside, the valve pad (10) is arranged on the outer side of the annular boss of the air inlet, the lower end face of the valve (8) is tightly pressed and sealed with the valve pad (10), the locking ring (9) is further arranged on the outer side of the lower end of the valve (8), the locking ring is in threaded connection with the inner wall of the shell (11) to tightly press the valve pad (10), and the valve (8) and the shell (11) are made of metal.
2. The high pressure oxygen switch according to claim 1, wherein a portion of the case (11) contacting the lower end of the valve gasket (10) is provided with a triangular ring groove.
3. The high pressure oxygen switch according to claim 1, wherein a portion of the case (11) contacting the lower end of the valve mat (10) is provided with a semicircular convex ring.
4. The high pressure oxygen switch according to claim 3, wherein the rotation mechanism comprises: the hand wheel component (1), the rod (2), the nut (4), the pin (5), the rotating piece (6) and the rotating body (7), wherein the nut (4) is in threaded connection with the upper end of the shell (11), the hand wheel component (1) is fixed on the upper end of the rod (2), the rod (2) is installed in the nut (4) and is in clearance fit with the nut (4), the lower end of the rod (2) is provided with a radial outward annular boss, the inner wall of the nut (4) is provided with a step, the annular boss at the lower end of the rod (2) is matched with the step on the inner wall of the nut (4) to limit the upward movement of the rod (2), the lower end face of the rod (2) is provided with a groove, the upper part of the rotating piece (6) is arranged in the groove on the lower end face of the rod (2) and is fixed through the pin (5), the rotating body (7) is in threaded connection with the inner wall of the shell (11), the upper end face of the rotating body (7) is provided with a groove, the lower part of the rotating sheet (6) is arranged in a groove on the upper end surface of the rotating body (7) and is used for driving the rotating body (7) to move.
5. The high-pressure oxygen switch according to claim 1, characterized in that at least two sealing rings (3) are arranged between the rod (2) and the nut (4).
6. The high pressure oxygen switch according to claim 1, wherein the annular boss at the lower end of the rod (2) is provided with a pressure seal (13) at the step-fitting position of the inner wall of the nut (4).
7. The high pressure oxygen switch according to claim 6, wherein the annular boss of the lower end of the rod (2) is line sealed with the packing (13).
8. The high pressure oxygen switch of claim 6, further comprising: and the locking nut (12), the locking nut (12) and the outer wall of the shell (11) are in threaded connection and are used for locking the nut (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111493665.7A CN114110179A (en) | 2021-12-08 | 2021-12-08 | High-pressure oxygen switch for preventing impact of micro-particles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111493665.7A CN114110179A (en) | 2021-12-08 | 2021-12-08 | High-pressure oxygen switch for preventing impact of micro-particles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114110179A true CN114110179A (en) | 2022-03-01 |
Family
ID=80364295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111493665.7A Pending CN114110179A (en) | 2021-12-08 | 2021-12-08 | High-pressure oxygen switch for preventing impact of micro-particles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114110179A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5029730A (en) * | 1989-03-23 | 1991-07-09 | Sparklet Devices, Inc. | Weldably sealed oxygen container |
| CN2508070Y (en) * | 2001-09-27 | 2002-08-28 | 周德俭 | Pressure gas safety valve |
| CN2826095Y (en) * | 2005-08-15 | 2006-10-11 | 宁波志清实业有限公司 | Liquefied petroleum gas cylinder valve |
| CN200982423Y (en) * | 2006-11-09 | 2007-11-28 | 上海气体阀门总厂 | Compressed natural gas check valve for vehicle use |
| CN201739626U (en) * | 2010-08-12 | 2011-02-09 | 新兴重工湖北三六一一机械有限公司 | Sealing device |
| CN203730774U (en) * | 2014-01-17 | 2014-07-23 | 宁波星箭航天机械有限公司 | High pressure gas pressure reducing valve |
| CN109944965A (en) * | 2019-04-17 | 2019-06-28 | 西安硕格电子科技有限公司 | A kind of safety valve mechanism of airborne chemical oxygen-producing device |
-
2021
- 2021-12-08 CN CN202111493665.7A patent/CN114110179A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5029730A (en) * | 1989-03-23 | 1991-07-09 | Sparklet Devices, Inc. | Weldably sealed oxygen container |
| CN2508070Y (en) * | 2001-09-27 | 2002-08-28 | 周德俭 | Pressure gas safety valve |
| CN2826095Y (en) * | 2005-08-15 | 2006-10-11 | 宁波志清实业有限公司 | Liquefied petroleum gas cylinder valve |
| CN200982423Y (en) * | 2006-11-09 | 2007-11-28 | 上海气体阀门总厂 | Compressed natural gas check valve for vehicle use |
| CN201739626U (en) * | 2010-08-12 | 2011-02-09 | 新兴重工湖北三六一一机械有限公司 | Sealing device |
| CN203730774U (en) * | 2014-01-17 | 2014-07-23 | 宁波星箭航天机械有限公司 | High pressure gas pressure reducing valve |
| CN109944965A (en) * | 2019-04-17 | 2019-06-28 | 西安硕格电子科技有限公司 | A kind of safety valve mechanism of airborne chemical oxygen-producing device |
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