CN101507852B - Pneumatic pressure low-pressure alarming device - Google Patents
Pneumatic pressure low-pressure alarming device Download PDFInfo
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- CN101507852B CN101507852B CN2009100644347A CN200910064434A CN101507852B CN 101507852 B CN101507852 B CN 101507852B CN 2009100644347 A CN2009100644347 A CN 2009100644347A CN 200910064434 A CN200910064434 A CN 200910064434A CN 101507852 B CN101507852 B CN 101507852B
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Abstract
The invention relates to a pneumatic low pressure warning device, which is characterized in that the device comprises a pressure detection mechanism, a micro switching valve and a warning mechanism; and two paths of gas are output through a tee from a gas source, wherein one path is delivered to a gas source inlet of the pressure detection mechanism to detect the pressure of the gas source, and the other path is delivered to a gas source inlet of the micro switching valve and taken as driving gas flow of the warning device. Compared with the prior art, the pneumatic low pressure warning device has the advantages that the warning device needs no power source, is completely driven by the gas source, can be used as a low pressure warning mechanism in a full pneumatic control respirator or other pneumatic products, and has high precision, simple structure, low cost and easy realization.
Description
Affiliated technical field
The present invention relates to a kind of medical breathing machine, particularly relate to the pressure height that to judge pneumatic means under a kind of condition that need not power supply, and when pressure is on the low side, send the Pneumatic pressure low-pressure alarming device of alarm signal.
Background technology
The low pressure alarming mechanism of the respirator of prior art all is to gather pressure signal and send into single-chip microcomputer with the alarming value of setting compares by pressure transducer, when reaching alert if, controls buzzer and sends alarm signal.This mode belongs to automatically controlled alarm mechanism, needs the power supply power supply, and needs electronic device such as pressure transducer to cooperate with single-chip microcomputer, so restricted by Power Supplies Condition, can not be used for the respirator of pneumatic gas-control, and the cost height.
Summary of the invention
Purpose of the present invention provides a kind of power-source free Pneumatic pressure low-pressure alarming device at existing weak point in the above-mentioned prior art just.Characteristics such as this device can be widely used in the automatically controlled and gas control respirator, has the precision height, and is simple in structure, and cost is low.
Purpose of the present invention can realize by following technique measures:
Pneumatic pressure low-pressure alarming device of the present invention comprises pressure detecting mechanism, microswitch valve and alarm mechanism three parts; By threeway, from source of the gas output two-way gas, one road gas source inlet of delivering to pressure-detecting device detects bleed pressure, and the driving air-flow of the gas source air inlet of microswitch valve as alarm device delivered on another road.Wherein: described pressure detecting mechanism comprises the shell body that is provided with upper and lower chamber, be encapsulated in diaphragm in the shell body cavity of resorption by bottom end cover, and forming a closed cavity by diaphragm and bottom end cover, this closed cavity links to each other with source of the gas by the gas source inlet that is arranged on the bottom end cover; The center pole socket that described diaphragm passes through combines with the center-pole that is positioned at its top; The upper end of described center-pole is passed the pilot hole that processes on the dividing plate of upper and lower chamber and is extended to straight up in the epicoele of shell body, and combine with side's disposed thereon flexible adjustment parts, the center-pole section that is arranged in the shell body epicoele is provided with the pressure transmission bar that a level extends laterally, and the elongated end of this pressure transmission bar passes the perpendicular bar shape trench hole of putting that processes on the shell body and combines with the main valve stem of microswitch;
Described microswitch valve comprises valve body, be provided with the bottom baffles of the central gas stream passage that is processed with in its body cavity bottom, below described bottom baffles, be provided with a cavity, the air inlet piece that is used to connect alarm mechanism is installed in this cavity, on this air inlet piece, be processed with the air flue hole with the gas channel coaxial line, with the place of matching, air flue hole of air inlet piece sealing ring be installed at gas channel; Main valve stem is installed in body cavity, the upper end of described main valve stem is passed the central through hole that processes on the valve pocket upper end cover and is extended upwardly to outside the end cap, the lower end of main valve stem is passed in the air flue hole that the gas channel, the sealing ring that process on the valve body bottom baffles extend downward the air inlet piece successively, is provided with the valve plate that forms sealing pair with the sealing ring bottom surface at the following elongated end of main valve stem; The internal diameter of described sealing ring is greater than being installed on the diameter that it seals intra-annular main valve stem hypomere valve rod, and by the gap looping gas channel between sealing ring and main valve stem hypomere valve rod; The body cavity lower sides is provided with gas source air inlet;
Described alarm mechanism comprises the alarm mechanism housing, be installed in blowing in the housing inner chamber and can cause that down gas vibrates and send the unidirectional diaphragm of certain frequency acoustical signal at air-flow, be installed in the air inlet piece that combines with microswitch valve of unidirectional diaphragm top, and the air-flow sounding passage that is positioned at unidirectional diaphragm below.
Center pole socket described in the present invention is inverted T font structure, its shank portion is passed the counterbore that processes on diaphragm-operated central through hole and the center-pole lower surface from bottom to top and is combined, and is positioned at the valve plate part of pole socket body of rod lower end, center and matches with gas source inlet on the bottom end cover.
The middle part of the main valve stem in the described microswitch valve described in the present invention is arranged at intervals with upper and lower two ring platforms, at two ring interstations the sealing ring that forms sealing pair with the microswitch valve cavity wall is installed; And described main valve stem is to be made of the different cylinder-shaped valve rod of two sections diameter, and wherein, the diameter that is positioned at the lower valve rod section of encircling the platform below down is less than being positioned at the diameter of the upper valve rod section of ring platform top down; The diameter of valve plate that is positioned at the main valve stem lower end is less than the diameter of described ring platform.
Operation principle of the present invention is as follows:
Wherein the operation principle of pressure detecting mechanism is: form a closed cavity when the pressure gas source of setting enters by diaphragm and bottom end cover by gas source inlet, the center pole socket overcomes the spring that is arranged on center-pole top under bleed pressure promotes regulates the press belt disorder of internal organs core bar of parts and moves up, for also make upwards displacement movement with the pressure transmission bar of the elongate rod structure that fixedly installs in the center-pole side and with the direction perpendicular to center-pole thereupon.And be arranged on adjustable cap in the flexible adjustment parts on the center-pole to the pretightning force of spring and bleed pressure combined effect in center-pole, thereby this has just determined the displacement of center-pole to determine the position of pressure transmission bar.The pretightning force that changes spring by the height of regulating adjustable cap realizes the adjusting just of pressure transmission bar.When bleed pressure is lower than setting value (when bleed pressure is on the low side), the center pole socket is then done oppositely (downwards) displacement movement under the predetermined pressure effect of spring adjusting parts, and drive pressure transmission bar is made downward displacement movement thereupon.
The last elongated end of the main valve stem described in the microswitch valve is and the contacted stressed press-side of the pressure transmission bar of pressure detecting mechanism, when having external force, press-side do not do the time spent, be provided with the bleed pressure that gas source air inlet enters by the body cavity lower sides and act on main valve stem two ends (being to act on down Huan Tai bottom surface and valve plate end face specifically), because main valve stem is by last thick, the different cylinder-shaped valve rod of two sections thin down diameters constitutes, upward pressure greater than downward pressure, move on the main valve stem, the valve plate that is positioned at the main valve stem lower end by with the gas channel that the microswitch housing bottom is processed that cooperates of " O " type sealing ring bottom surface---be the gas outlet sealing, valve closing; When at the press-side externally applied forces during greater than bleed pressure, main valve stem moves down, valve plate breaks away from " O " RunddichtringO bottom surface, switch opens, gas advances alarm mechanism from being flowed out by the gap looping gas channel between sealing ring and main valve stem hypomere valve rod by the air flue hole that processes on the air inlet piece; At this moment, source of the gas is converted to the medium that switch is controlled by sources of resistance, and the bleed pressure disappearance that acts on the upwards jack-up of Huan Tai bottom surface under the main valve stem makes valve thoroughly open, and produces big flow under little trick.
Alarm mechanism is an air stream drives, and is out-of-date as certain air flow stream, causes the gas vibration by unidirectional diaphragm, sends the acoustical signal of certain frequency.
Alarm threshold can carry out pressure to the pretightning force of spring and regulates and realize by regulating adjustable cap in the flexible adjustment parts in the pressure detecting mechanism.
Compared with prior art, the invention has the beneficial effects as follows: need not power supply, drive by source of the gas fully, can be used in the respirator of complete gas control or other pneumatic products as the low alarm mechanism of pressure, and the precision height, simple in structure, cost is low, is easy to realize.
Description of drawings
Fig. 1 is overall structure figure of the present invention.
Fig. 2 is the split figure of pressure detecting mechanism among Fig. 1.
Fig. 3 is the split figure of microswitch valve among Fig. 1.
Fig. 4 is the split figure of alarm mechanism in the body 1.
Sequence number among the figure, 1. pressure detecting mechanism gas source air inlet, 2. bottom end cover, 3. diaphragm, 4. center pole socket, 5. pressure detecting mechanism lower house, 6. center-pole, 7. pressure detecting mechanism upper shell, 8. spring, 9. adjustable cap, 10. pressure transmission bar, 11. main valve stem, 12. valve pocket upper end covers, 13. " O " RunddichtringO, 14. the microswitch valve gas source air inlet, 15. " O " type sealing ring, 16. are used to be installed into the cavity of air parcel, 17. the air inlet piece, 18. unidirectional diaphragms, 19. alarm mechanism housings.
The specific embodiment
The present invention is further described below with reference to embodiment (accompanying drawing):
As shown in Figure 1, Pneumatic pressure low-pressure alarming device of the present invention comprises pressure detecting mechanism, microswitch valve and alarm mechanism three parts.By threeway, from source of the gas output two-way gas, one road gas source inlet of delivering to pressure-detecting device detects bleed pressure, and the driving air-flow of the gas source air inlet of microswitch valve as alarm device delivered on another road.
As shown in Figure 1 and Figure 2, described pressure detecting mechanism comprises by the mode spinning that the is threaded shell body of being made up of upper shell 7 and lower house 5 that is provided with upper and lower chamber together, be encapsulated in diaphragm 3 in the shell body cavity of resorption by bottom end cover 2, and forming a closed cavity by diaphragm 3 and bottom end cover 2, this closed cavity links to each other with source of the gas by the gas source inlet 1 that is arranged on the bottom end cover 2; The center pole socket 4 that described diaphragm 3 passes through combines with the center-pole 6 that is positioned at its top; The upper end of described center-pole 6 is passed the pilot hole that processes on the dividing plate of upper and lower chamber and is extended to straight up in the epicoele of shell body, and combine with the side's disposed thereon flexible adjustment parts of forming by spring 8 and adjustable cap 9, the center-pole that is arranged in the shell body epicoele is provided with the pressure transmission bar 10 that a level extends laterally for 6 sections, and the elongated end of this pressure transmission bar 10 passes the perpendicular bar shape trench hole of putting that processes on the shell body and combines with the main valve stem 11 of microswitch; Described center pole socket 4 is inverted T font structure, the counterbore that processes on the central through hole that its shank portion is passed diaphragm 3 from bottom to top and center-pole 6 lower surfaces combines, and is positioned at the valve plate part of center pole socket 4 body of rod lower ends and matches with gas source inlet 1 on the bottom end cover 2.
As Fig. 1, shown in Figure 3, described microswitch valve comprises valve body, be provided with the bottom baffles of the central gas stream passage that is processed with in its body cavity bottom, below described bottom baffles, be provided with a cavity 16, the air inlet piece 17 that is used to connect alarm mechanism is installed in this cavity, on this air inlet piece 17, be processed with the air flue hole with the gas channel coaxial line, with the place of matching, air flue hole of air inlet piece 7 sealing ring 5 be installed at gas channel; Main valve stem 11 is installed in body cavity, the upper end of described main valve stem 11 is passed the central through hole that processes on the valve pocket upper end cover 2 and is extended upwardly to outside the end cap, the lower end of main valve stem 11 is passed in the gas channel that processes on the valve body bottom baffles, the air flue hole that sealing ring 15 extends downward air inlet piece 7 successively, is provided with the valve plate that forms sealing pair with sealing ring 15 bottom surfaces at the following elongated end of main valve stem 1; The internal diameter of described sealing ring 15 is greater than being installed on the diameter that it seals intra-annular main valve stem 11 hypomere valve rods, and by the gap looping gas channel between sealing ring and main valve stem 11 hypomere valve rods; The body cavity lower sides is provided with gas source air inlet 14; The middle part of the main valve stem 11 in the described microswitch valve is arranged at intervals with upper and lower two ring platforms, at two ring interstations the sealing ring that forms sealing pair with the microswitch valve cavity wall is installed; Described main valve stem 11 is to be made of the different cylinder-shaped valve rod of two sections diameter, wherein, the diameter that is positioned at the following lower valve rod section of ring platform below is less than being positioned at the diameter of the upper valve rod section of ring platform top down, and the diameter of valve plate that is positioned at main valve stem 11 lower ends is less than the diameter of described ring platform.
As Fig. 1, shown in Figure 4, described alarm mechanism comprises alarm mechanism housing 19, be installed in blowing in the housing inner chamber and can cause that down gas vibrates and send the unidirectional diaphragm 18 of certain frequency acoustical signal at air-flow, be installed in the air inlet piece 17 that combines with microswitch valve of unidirectional diaphragm 18 tops, and the air-flow sounding passage that is positioned at unidirectional diaphragm 18 belows.
Claims (5)
1. Pneumatic pressure low-pressure alarming device, it is characterized in that: this device comprises pressure detecting mechanism, microswitch valve and alarm mechanism three parts;
A, described pressure detecting mechanism comprise the shell body that is provided with upper and lower chamber, be encapsulated in diaphragm (3) in the shell body cavity of resorption by bottom end cover (2), and forming a closed cavity by diaphragm (3) and bottom end cover (2), this closed cavity links to each other with source of the gas by the gas source inlet (1) that is arranged on the bottom end cover (2); The center pole socket (4) that described diaphragm (3) passes through combines with the center-pole (6) that is positioned at its top; The upper end of described center-pole (6) is passed the pilot hole that processes on the dividing plate of upper and lower chamber and is extended to straight up in the epicoele of shell body, and combine with side's disposed thereon flexible adjustment parts, center-pole (6) section that is arranged in the shell body epicoele is provided with the pressure transmission bar (10) that a level extends laterally, and the elongated end of this pressure transmission bar (10) passes the perpendicular bar shape trench hole of putting that processes on the shell body and combines with the main valve stem (11) of microswitch;
B, described microswitch valve comprise valve body, be provided with the bottom baffles of the central gas stream passage that is processed with in its body cavity bottom, below described bottom baffles, be provided with a cavity (16), the air inlet piece (17) that is used to connect alarm mechanism is installed in this cavity, on this air inlet piece (17), be processed with the air flue hole with the gas channel coaxial line, with the place of matching, air flue hole of air inlet piece (17) sealing ring (15) be installed at gas channel; Main valve stem (11) is installed in body cavity, the upper end of described main valve stem (11) is passed the central through hole that processes on the valve pocket upper end cover (12) and is extended upwardly to outside the end cap, the lower end of main valve stem (11) is passed the gas channel, the sealing ring (15) that process on the valve body bottom baffles successively and is extended downward in the air flue hole of air inlet piece (17), is provided with the valve plate that forms sealing pair with sealing ring (15) bottom surface at the following elongated end of main valve stem (11); The internal diameter of described sealing ring (15) is greater than being installed on the diameter that it seals intra-annular main valve stem (11) hypomere valve rod, and by the gap looping gas channel between sealing ring and main valve stem (11) hypomere valve rod; The body cavity lower sides is provided with gas source air inlet (14);
C, described alarm mechanism comprise the alarm mechanism housing, be installed in blowing in the housing inner chamber and can cause that down gas vibrates and send the unidirectional diaphragm (18) of certain frequency acoustical signal at air-flow, be installed in the air inlet piece (17) that combines with microswitch valve of unidirectional diaphragm (18) top, and the air-flow sounding passage that is positioned at unidirectional diaphragm (18) below.
2. Pneumatic pressure low-pressure alarming device according to claim 1, it is characterized in that: described center pole socket (4) is inverted T font structure, the counterbore that processes on the central through hole that its shank portion is passed diaphragm (3) from bottom to top and center-pole (6) lower surface combines, and is positioned at the valve plate part of center pole socket (4) body of rod lower end and matches with gas source inlet (1) on the bottom end cover (2).
3. Pneumatic pressure low-pressure alarming device according to claim 1, it is characterized in that: the middle part of the main valve stem in the described microswitch valve (11) is arranged at intervals with upper and lower two ring platforms, at two ring interstations the sealing ring that forms sealing pair with the microswitch valve cavity wall is installed.
4. Pneumatic pressure low-pressure alarming device according to claim 3, it is characterized in that: described main valve stem (11) is to be made of the different cylinder-shaped valve rod of two sections diameter, wherein, be positioned at the diameter of the lower valve rod section of encircling the platform below down less than being positioned at the diameter of the upper valve rod section of ring platform top down.
5. Pneumatic pressure low-pressure alarming device according to claim 3 is characterized in that: the diameter of valve plate that is positioned at main valve stem (11) lower end is less than the diameter of described ring platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100644347A CN101507852B (en) | 2009-03-23 | 2009-03-23 | Pneumatic pressure low-pressure alarming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100644347A CN101507852B (en) | 2009-03-23 | 2009-03-23 | Pneumatic pressure low-pressure alarming device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101507852A CN101507852A (en) | 2009-08-19 |
| CN101507852B true CN101507852B (en) | 2011-04-20 |
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| CN2009100644347A Expired - Fee Related CN101507852B (en) | 2009-03-23 | 2009-03-23 | Pneumatic pressure low-pressure alarming device |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103028173A (en) * | 2011-09-29 | 2013-04-10 | 北京航天长峰股份有限公司 | Pneumatic alarm device |
| CN103712063B (en) * | 2013-12-28 | 2015-12-23 | 上海析维生物医药科技有限公司 | A kind of feeding pneumatic automatic switchover device with gas circuit low pressure SMS alarm function |
| CN105608811B (en) * | 2015-12-28 | 2018-05-01 | 中国煤炭科工集团太原研究院有限公司 | A kind of air pulsing jingle bell |
| CN111188943B (en) * | 2020-03-03 | 2021-08-20 | 中国船舶重工集团公司第七0七研究所九江分部 | Mechanical pneumatic pressure alarm device |
| CN112675395B (en) * | 2020-12-31 | 2025-01-28 | 捷锐企业(上海)有限公司 | A new dual-channel gas source underpressure alarm device |
| CN112944208A (en) * | 2021-03-02 | 2021-06-11 | 固诺（天津）实业有限公司 | Liquefied gas fills dress controlling means and liquefied gas fills dress system |
| CN114639221B (en) * | 2022-03-09 | 2023-08-08 | 广东省东莞地质工程勘察院有限公司 | Intelligent acquisition method for geological disaster investigation information |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3867934A (en) * | 1973-05-04 | 1975-02-25 | Veriflo Corp | Pressure monitor for a lung ventilator |
| CN2355381Y (en) * | 1998-12-23 | 1999-12-22 | 孟庆友 | Pneumatic low pressure alarm |
| CN1374136A (en) * | 2002-04-11 | 2002-10-16 | 山西虹安科技有限公司 | Pneuamtic device for positive pressure oxygen respirator |
| CN2645065Y (en) * | 2003-08-27 | 2004-09-29 | 王洪伟 | Pressure alarm |
| CN201133858Y (en) * | 2007-12-28 | 2008-10-15 | 重庆华渝电气仪表总厂 | Coal mine inhaler alarm |
| CN101310784A (en) * | 2007-12-28 | 2008-11-26 | 北京谊安医疗系统股份有限公司 | High response air controlled trigger mechanism |
| CN201434747Y (en) * | 2009-03-23 | 2010-03-31 | 王中 | Pneumatic low-pressure alarming device |
-
2009
- 2009-03-23 CN CN2009100644347A patent/CN101507852B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3867934A (en) * | 1973-05-04 | 1975-02-25 | Veriflo Corp | Pressure monitor for a lung ventilator |
| CN2355381Y (en) * | 1998-12-23 | 1999-12-22 | 孟庆友 | Pneumatic low pressure alarm |
| CN1374136A (en) * | 2002-04-11 | 2002-10-16 | 山西虹安科技有限公司 | Pneuamtic device for positive pressure oxygen respirator |
| CN2645065Y (en) * | 2003-08-27 | 2004-09-29 | 王洪伟 | Pressure alarm |
| CN201133858Y (en) * | 2007-12-28 | 2008-10-15 | 重庆华渝电气仪表总厂 | Coal mine inhaler alarm |
| CN101310784A (en) * | 2007-12-28 | 2008-11-26 | 北京谊安医疗系统股份有限公司 | High response air controlled trigger mechanism |
| CN201434747Y (en) * | 2009-03-23 | 2010-03-31 | 王中 | Pneumatic low-pressure alarming device |
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