CN109944965B - Safety valve mechanism of onboard chemical oxygen generator - Google Patents
Safety valve mechanism of onboard chemical oxygen generator Download PDFInfo
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- CN109944965B CN109944965B CN201910306780.5A CN201910306780A CN109944965B CN 109944965 B CN109944965 B CN 109944965B CN 201910306780 A CN201910306780 A CN 201910306780A CN 109944965 B CN109944965 B CN 109944965B
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Abstract
The invention belongs to an airborne oxygen generation technology, and relates to a safety valve mechanism of an airborne chemical oxygen generator. Including chemistry oxygen production end cover (3), its characterized in that: the safety valve mechanism consists of a sealing gasket (1), a valve mechanism base (2), a pressing gasket (4), an elastic pin (5), a spring (6), a valve mechanism end cover (7), a valve (8) and a valve gasket (9). The invention provides a safety valve mechanism of an onboard chemical oxygen generator, which has the advantages of simple structure, small volume, light weight, reliable work and convenient installation, and meets the development requirement of the onboard chemical oxygen generator.
Description
Technical Field
The invention belongs to an airborne oxygen generation technology, and relates to a safety valve mechanism of an airborne chemical oxygen generator.
Background
The newly developed onboard chemical oxygen generator needs to be provided with a safety valve mechanism on an end cover of the chemical oxygen generator, and the safety valve mechanism is required to be simple in structure, small in size, light in weight, reliable in work and convenient to install. The existing valve mechanism is difficult to meet the requirements.
Disclosure of Invention
The purpose of the invention is: the safety valve mechanism of the onboard chemical oxygen generator has the advantages of simple structure, small volume, light weight, reliable work and convenience in installation, so that the development requirement of the onboard chemical oxygen generator is met.
The technical scheme of the invention is as follows: a safety valve mechanism of an onboard chemical oxygen generator comprises a chemical oxygen generator end cover 3, wherein a safety valve mechanism mounting hole is formed in the center of the chemical oxygen generator end cover 3; the method is characterized in that: the safety valve mechanism consists of a sealing gasket 1, a valve mechanism base 2, a pressing gasket 4, an elastic pin 5, a spring 6, a valve mechanism end cover 7, a valve 8 and a valve pad 9; the valve mechanism base 2 has the appearance of a two-stage step shaft, the outer diameter of a positioning section 2a of a lower section is larger than that of a transition section 2b of a middle section, the outer diameter of the transition section 2b of the middle section is larger than that of a connecting section 2c of an upper section, sealing gasket mounting grooves 2j are formed in the step end faces of the positioning section 2a and the transition section 2b, and a connecting section elastic pin half groove 2i is formed in the outer cylindrical surface of the connecting section 2 c; the inner air inlet channel of the valve mechanism base 2 is provided with a first section of round hole 2f, a second section of circular platform hole 2e, a third section of round hole 2d and a fourth section of circular platform hole 2g from bottom to top, the lower end face of the first section of round hole 2f is open, the upper end of the first section of round hole 2f is communicated with the lower end of the second section of circular platform hole 2e, the upper end of the second section of circular platform hole 2e is communicated with the lower end of the third section of round hole 2d, the upper end of the third section of round hole 2d is communicated with the lower end of the fourth section of circular platform hole 2g, and a valve seat 2h formed by annular cutting edges is arranged around the upper surface of the fourth section of circular platform hole 2 g;
the valve mechanism end cover 7 is a cylinder, the inner hole of the valve mechanism end cover 7 is a step hole, the upper section hole of the inner hole of the valve mechanism end cover 7 is an exhaust section, the lower section hole of the inner hole of the valve mechanism end cover 7 is an installation connecting section, the aperture of the installation connecting section is larger than that of the exhaust section, the aperture of the installation connecting section is in clearance fit with the outer diameter of the connecting section 2c of the nozzle base 2, the inner cylindrical surface of the installation connecting section is provided with a valve mechanism end cover elastic pin half groove, the position of the valve mechanism end cover elastic pin half groove corresponds to the position of the connecting section elastic pin half groove 2i, and the outer cylindrical surface of the installation connecting section is provided with an elastic pin installation opening corresponding to the position of the valve mechanism end cover elastic pin half groove; the transition section 2b of the valve mechanism base 2 penetrates through a safety valve mechanism mounting hole of the chemical oxygen production device end cover 3 from inside to outside, the step end face of the positioning section 2a is attached to the inner surface of the chemical oxygen production device end cover 3, the sealing gasket 1 is positioned in the sealing gasket mounting groove 2j, the compression gasket 4 is sleeved on the transition section 2b below the connection section elastic pin half groove 2i, the compression gasket 4 is in interference fit with the transition section 2b, the valve mechanism base 2 is fixed on the chemical oxygen production device end cover 3, the mounting connection section of the inner hole of the valve mechanism end cover 7 is sleeved outside the transition section 2b of the valve mechanism base 2, the connection section elastic pin half groove 2i of the valve mechanism base 2 and the valve mechanism end cover elastic pin half groove of the valve mechanism end cover 7 are combined to form a complete elastic pin mounting groove, the elastic pin 5 is mounted in the elastic pin mounting groove, and the valve mechanism base 2 and the valve mechanism; the valve 8 is arranged in a lower section hole of an inner hole of the valve mechanism end cover 7 and keeps a sliding gap, the valve 8 is positioned on the valve seat 2h, the valve 8 is a cylinder with one step, the outer diameter of the upper cylinder is smaller than that of the lower cylinder, a circular groove is formed in the lower end face of the lower cylinder of the valve 8, a valve pad 9 made of rubber materials is bonded in the circular groove, and the outer diameter of the valve pad 9 is larger than the diameter of an annular cutting edge of the valve seat 2 h; the spring 6 is arranged in a lower section hole of an inner hole of the valve mechanism end cover 7, the upper end of the spring 6 props against the step end face between the upper section hole and the lower section hole of the valve mechanism end cover 7, and the lower end of the spring 6 props against the upper end face of a lower cylinder of the valve 8; the valve 8, the spring 6 and the valve seat 2e form a valve mechanism of the safety valve mechanism, when the pressure generated by the air pressure in the end cover 3 of the chemical oxygen generator on the valve 8 is greater than the safety opening threshold value of the valve mechanism, the valve mechanism is in an open state, and the gas enters the valve mechanism from the air inlet channel from bottom to top through the first section of round hole 2f, the second section of round platform hole 2e, the third section of round hole 2d and the fourth section of round platform hole 2g and is discharged from the exhaust section of the inner hole of the end cover 7 of the safety valve mechanism; otherwise, the shutter mechanism is in a closed state.
The invention has the advantages that: the safety valve mechanism of the onboard chemical oxygen generator has the advantages of simple structure, small volume, light weight, reliable work and convenience in installation, and meets the development requirements of the onboard chemical oxygen generator.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural view of the shutter mechanism base 2 of the present invention.
Detailed Description
The present invention is described in further detail below. Referring to fig. 1 and 2, the safety valve mechanism of the onboard chemical oxygen generator comprises a chemical oxygen generator end cover 3, wherein a safety valve mechanism mounting hole is formed in the center of the chemical oxygen generator end cover 3; the method is characterized in that: the safety valve mechanism consists of a sealing gasket 1, a valve mechanism base 2, a pressing gasket 4, an elastic pin 5, a spring 6, a valve mechanism end cover 7, a valve 8 and a valve pad 9; the valve mechanism base 2 has the appearance of a two-stage step shaft, the outer diameter of a positioning section 2a of a lower section is larger than that of a transition section 2b of a middle section, the outer diameter of the transition section 2b of the middle section is larger than that of a connecting section 2c of an upper section, sealing gasket mounting grooves 2j are formed in the step end faces of the positioning section 2a and the transition section 2b, and a connecting section elastic pin half groove 2i is formed in the outer cylindrical surface of the connecting section 2 c; the inner air inlet channel of the valve mechanism base 2 is provided with a first section of round hole 2f, a second section of circular platform hole 2e, a third section of round hole 2d and a fourth section of circular platform hole 2g from bottom to top, the lower end face of the first section of round hole 2f is open, the upper end of the first section of round hole 2f is communicated with the lower end of the second section of circular platform hole 2e, the upper end of the second section of circular platform hole 2e is communicated with the lower end of the third section of round hole 2d, the upper end of the third section of round hole 2d is communicated with the lower end of the fourth section of circular platform hole 2g, and a valve seat 2h formed by annular cutting edges is arranged around the upper surface of the fourth section of circular platform hole 2 g;
the valve mechanism end cover 7 is a cylinder, the inner hole of the valve mechanism end cover 7 is a step hole, the upper section hole of the inner hole of the valve mechanism end cover 7 is an exhaust section, the lower section hole of the inner hole of the valve mechanism end cover 7 is an installation connecting section, the aperture of the installation connecting section is larger than that of the exhaust section, the aperture of the installation connecting section is in clearance fit with the outer diameter of the connecting section 2c of the nozzle base 2, the inner cylindrical surface of the installation connecting section is provided with a valve mechanism end cover elastic pin half groove, the position of the valve mechanism end cover elastic pin half groove corresponds to the position of the connecting section elastic pin half groove 2i, and the outer cylindrical surface of the installation connecting section is provided with an elastic pin installation opening corresponding to the position of the valve mechanism end cover elastic pin half groove; the transition section 2b of the valve mechanism base 2 penetrates through a safety valve mechanism mounting hole of the chemical oxygen production device end cover 3 from inside to outside, the step end face of the positioning section 2a is attached to the inner surface of the chemical oxygen production device end cover 3, the sealing gasket 1 is positioned in the sealing gasket mounting groove 2j, the compression gasket 4 is sleeved on the transition section 2b below the connection section elastic pin half groove 2i, the compression gasket 4 is in interference fit with the transition section 2b, the valve mechanism base 2 is fixed on the chemical oxygen production device end cover 3, the mounting connection section of the inner hole of the valve mechanism end cover 7 is sleeved outside the transition section 2b of the valve mechanism base 2, the connection section elastic pin half groove 2i of the valve mechanism base 2 and the valve mechanism end cover elastic pin half groove of the valve mechanism end cover 7 are combined to form a complete elastic pin mounting groove, the elastic pin 5 is mounted in the elastic pin mounting groove, and the valve mechanism base 2 and the valve mechanism; the valve 8 is arranged in a lower section hole of an inner hole of the valve mechanism end cover 7 and keeps a sliding gap, the valve 8 is positioned on the valve seat 2h, the valve 8 is a cylinder with one step, the outer diameter of the upper cylinder is smaller than that of the lower cylinder, a circular groove is formed in the lower end face of the lower cylinder of the valve 8, a valve pad 9 made of rubber materials is bonded in the circular groove, and the outer diameter of the valve pad 9 is larger than the diameter of an annular cutting edge of the valve seat 2 h; the spring 6 is arranged in a lower section hole of an inner hole of the valve mechanism end cover 7, the upper end of the spring 6 props against the step end face between the upper section hole and the lower section hole of the valve mechanism end cover 7, and the lower end of the spring 6 props against the upper end face of a lower cylinder of the valve 8; the valve 8, the spring 6 and the valve seat 2e form a valve mechanism of the safety valve mechanism, when the pressure generated by the air pressure in the end cover 3 of the chemical oxygen generator on the valve 8 is greater than the safety opening threshold value of the valve mechanism, the valve mechanism is in an open state, and the gas enters the valve mechanism from the air inlet channel from bottom to top through the first section of round hole 2f, the second section of round platform hole 2e, the third section of round hole 2d and the fourth section of round platform hole 2g and is discharged from the exhaust section of the inner hole of the end cover 7 of the safety valve mechanism; otherwise, the shutter mechanism is in a closed state.
In order to increase the gas flow, at least 2 ventilation grooves which are uniformly distributed along the circumference, are parallel to the axis of the valve 8 and penetrate through the upper end surface and the lower end surface of the lower cylinder of the valve 8 are arranged on the outer cylindrical surface of the lower cylinder of the valve 8.
The working principle of the invention is as follows: the chemical oxygen production device is simple in structure, light in weight and convenient to install, the valve mechanism base penetrates out of the inner side of the end cover of the chemical oxygen production device and is pressed and positioned by the pressing gasket, and the valve mechanism end cover and the valve mechanism base are positioned by the elastic pin. When the pressure generated by the air pressure in the end cover of the chemical oxygen generator on the valve is greater than the safe opening threshold value of the valve mechanism, the valve mechanism is in an open state, and the gas enters the valve mechanism from the air inlet channel from bottom to top through the first section of round hole, the second section of round platform hole, the third section of round hole and the fourth section of round platform hole and is discharged from the exhaust section of the inner hole of the end cover of the safety valve mechanism; when the pressure generated by the air pressure in the end cover of the chemical oxygen generator on the valve is less than or equal to the safe opening threshold value of the valve mechanism, the valve mechanism is in a closed state.
Claims (1)
1. A safety valve mechanism of an onboard chemical oxygen generator comprises a chemical oxygen generator end cover (3), wherein a safety valve mechanism mounting hole is formed in the center of the chemical oxygen generator end cover (3); the method is characterized in that: the safety valve mechanism consists of a sealing gasket (1), a valve mechanism base (2), a pressing gasket (4), an elastic pin (5), a spring (6), a valve mechanism end cover (7), a valve (8) and a valve gasket (9); the valve mechanism base (2) is provided with the appearance of a two-stage step shaft, the outer diameter of a positioning section (2a) of a lower section is larger than that of a transition section (2b) of a middle section, the outer diameter of the transition section (2b) of the middle section is larger than that of a connecting section (2c) of an upper section, sealing gasket mounting grooves (2j) are formed in the step end faces of the positioning section (2a) and the transition section (2b), and a connecting section elastic pin half groove (2i) is formed in the outer cylindrical face of the connecting section (2 c); the inner air inlet channel of the valve mechanism base (2) is provided with a first section of round hole (2f), a second section of circular table hole (2e), a third section of round hole (2d) and a fourth section of circular table hole (2g) from bottom to top, the lower end face of the first section of round hole (2f) is open, the upper end of the first section of round hole (2f) is communicated with the lower end of the second section of circular table hole (2e), the upper end of the second section of circular table hole (2e) is communicated with the lower end of the third section of round hole (2d), the upper end of the third section of round hole (2d) is communicated with the lower end of the fourth section of circular table hole (2g), and a valve seat (2h) formed by annular cutting edges is arranged on the periphery of the upper surface of the fourth section of circular table hole (2 g); the valve mechanism end cover (7) is a cylinder, the inner hole of the valve mechanism end cover (7) is a step hole, the upper section hole of the inner hole of the valve mechanism end cover (7) is an exhaust section, the lower section hole of the inner hole of the valve mechanism end cover (7) is an installation connecting section, the aperture of the installation connecting section is larger than that of the exhaust section, the aperture of the installation connecting section is in clearance fit with the outer diameter of the connecting section (2c) of the valve mechanism base (2), the inner cylindrical surface of the installation connecting section is provided with a valve mechanism end cover elastic pin half groove, the position of the valve mechanism end cover elastic pin half groove corresponds to the position of the connecting section elastic pin half groove (2i), and the outer cylindrical surface of the installation connecting section and the position corresponding to the position of the valve mechanism end cover elastic pin half groove are provided with an elastic pin installation opening; the transition section (2b) of the valve mechanism base (2) penetrates through a safety valve mechanism mounting hole of a chemical oxygen generator end cover (3) from inside to outside, the step end face of the positioning section (2a) is attached to the inner surface of the chemical oxygen generator end cover (3), the sealing gasket (1) is positioned in a sealing gasket mounting groove (2j), the pressing gasket (4) is sleeved on the transition section (2b) below the connecting section elastic pin half groove (2i), the pressing gasket (4) is in interference fit with the transition section (2b), the valve mechanism base (2) is fixed on the chemical oxygen generator end cover (3), the mounting connecting section of an inner hole of the valve mechanism end cover (7) is sleeved outside the transition section (2b) of the valve mechanism base (2), the connecting section elastic pin half groove (2i) of the valve mechanism base (2) and the valve mechanism end cover elastic pin half groove of the valve mechanism end cover (7) are combined to form a complete elastic pin mounting groove, the elastic pin (5) is arranged in the elastic pin mounting groove, and the valve mechanism base (2) and the valve mechanism end cover (7) are connected into a whole; the valve (8) is arranged in a lower section hole of an inner hole of the valve mechanism end cover (7) and keeps a sliding gap, the valve (8) is positioned on the valve seat (2h), the valve (8) is a cylinder with one step, the outer diameter of an upper cylinder is smaller than that of a lower cylinder, a circular groove is formed in the lower end face of the lower cylinder of the valve (8), a valve pad (9) made of rubber materials is bonded in the circular groove, and the outer diameter of the valve pad (9) is larger than the diameter of an annular cutting edge of the valve seat (2 h); the spring (6) is arranged in a lower section hole of an inner hole of the valve mechanism end cover (7), the upper end of the spring (6) props against the step end face between the upper section hole and the lower section hole of the valve mechanism end cover (7), and the lower end of the spring (6) props against the upper end face of a lower cylinder of the valve (8); when the pressure generated by the air pressure in the chemical oxygen generator end cover (3) to the valve (8) is greater than the safe opening threshold value of the valve mechanism, the valve mechanism is in an open state, and gas enters the valve mechanism from the air inlet channel from bottom to top through the first section of round hole (2f), the second section of round hole (2e), the third section of round hole (2d) and the fourth section of round hole (2g) and is discharged from the exhaust section of the inner hole of the safety valve mechanism end cover (7); otherwise, the valve mechanism is in a closed state; at least 2 ventilation grooves which are uniformly distributed along the circumference, are parallel to the axis of the valve (8) and penetrate through the upper end surface and the lower end surface of the cylinder under the valve (8) are arranged on the outer cylindrical surface of the cylinder under the valve (8).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910306780.5A CN109944965B (en) | 2019-04-17 | 2019-04-17 | Safety valve mechanism of onboard chemical oxygen generator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910306780.5A CN109944965B (en) | 2019-04-17 | 2019-04-17 | Safety valve mechanism of onboard chemical oxygen generator |
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| CN109944965A CN109944965A (en) | 2019-06-28 |
| CN109944965B true CN109944965B (en) | 2020-12-15 |
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| CN114110179A (en) * | 2021-12-08 | 2022-03-01 | 合肥江航飞机装备股份有限公司 | High-pressure oxygen switch for preventing impact of micro-particles |
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| WO2003095965A2 (en) * | 2002-05-13 | 2003-11-20 | Envirotech Products Limited | Tank valve testing method |
| CN203549018U (en) * | 2013-10-22 | 2014-04-16 | 璟泰（清远）橡胶工业有限公司 | Pressure release valve |
| US9482354B2 (en) * | 2014-04-15 | 2016-11-01 | Girard Equipment, Inc. | Super high flow pressure relief vent |
| CN204403474U (en) * | 2014-12-26 | 2015-06-17 | 赵钱 | A kind of spring loaded breather valve |
| CN206555503U (en) * | 2017-03-04 | 2017-10-13 | 慈溪市凤祥电器仪表有限公司 | Large-displacement pressure relief valve |
| CN108223858A (en) * | 2017-08-08 | 2018-06-29 | 河南航天液压气动技术有限公司 | Valve sealing structure, valve and the low pressure valve using the sealing structure |
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