CN103185160A - Stepping motor proportioning valve - Google Patents

Stepping motor proportioning valve Download PDF

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Publication number
CN103185160A
CN103185160A CN2011104564758A CN201110456475A CN103185160A CN 103185160 A CN103185160 A CN 103185160A CN 2011104564758 A CN2011104564758 A CN 2011104564758A CN 201110456475 A CN201110456475 A CN 201110456475A CN 103185160 A CN103185160 A CN 103185160A
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CN
China
Prior art keywords
valve
proportional
proportional valve
valve port
port
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
Application number
CN2011104564758A
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Chinese (zh)
Inventor
龚家明
张凯
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Beijing Aeonmed Co Ltd
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Beijing Aeonmed Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Beijing Aeonmed Co Ltd filed Critical Beijing Aeonmed Co Ltd
Priority to CN2011104564758A priority Critical patent/CN103185160A/en
Publication of CN103185160A publication Critical patent/CN103185160A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a stepping motor proportioning valve which comprises a stepping motor and a proportioning valve body with a through hole at the middle part and a vent, wherein a throttle valve core is arranged in the through hole; one end of the throttle valve core is fixedly assembled with one end of the shaft of the stepping motor; the shaft of the stepping motor is in sealing mounting with the proportioning valve body; the other end of the throttle valve core is communicated with a low-pressure constant gas source supply device; a valve port is formed in the outer wall of the throttle valve core; and a proportioning valve switch and a flow control device are mounted at the other end of the shaft of the stepping motor so as to ensure that the opening and closing position of the proportioning valve just corresponds to the critical position of opening and closing position of the valve port. According to the invention, the stepping motor is used for controlling the rotation of the valve core so as to control the opening/closing of the valve port and to control the flow, which ensures normal operation and use of an anesthesia machine taking the low-pressure constant gas source as a driving gas.

Description

The stepper motor Proportional valve
Technical field
The present invention relates to a kind of stepper motor Proportional valve of fluid circuit flow control, relate in particular to a kind of stepper motor Proportional valve that uses low-pressure gas source to use as the Anesthesia machine that drives gas.
Background technique
As everyone knows, Anesthesia machine is an indispensable visual plant in the operation now.Anesthesia machine is by mechanical circuit anesthetic gases to be sent into patient's alveolar, forms the arcotic partial pressure, permeate into blood after, inhibitory action is directly taken place in central nervous system, thereby produces the effect of general anesthesia.Its groundwork process is to enter Anesthesia machine inside by high pressure oxygen, and after decompression, one road oxygen mixes by a certain percentage with anesthetic gases (for example laughing gas), and another road oxygen is pressed into patient end as propellant with mixed anesthetic gases.Thereby finish patient's aspiratory action.When patient exhales, will be released as the oxygen of propellant.
At present, common Anesthesia machine all adopts high pressure oxygen as power gas source, controls flow by flow control valve.This is because Anesthesia machine normally uses in hospital, and it can obtain sufficient oxygen from the central air supply system of hospital or oxygen bottle, thus can be directly as the propellant of Anesthesia machine.But so, this class of operating room that makes Anesthesia machine can only be used for hospital can provide place stable, high-pressure air source, and using has significant limitation.
When Anesthesia machine waits the place of high-pressure air source shortage to use in the open air, need carry high-pressure oxygen cylinder usually, in order to stable high-pressure air source is provided, make the Anesthesia machine proper functioning.But when using Anesthesia machine in the open air, it is very inconvenient to carry gas cylinder, and the amount of oxygen in the oxygen cylinder also is limited.If the propellant of Anesthesia machine still uses the high pressure oxygen in the oxygen cylinder, will certainly cause unnecessary waste, also can shorten simultaneously the service time of Anesthesia machine greatly, if but make Anesthesia machine adopt low-pressure gas source as driver, can not satisfy the flow control valve need of work of high-pressure air source condition again, Anesthesia machine is cisco unity malfunction, use just.
So how to make when Anesthesia machine waits the place of high-pressure air source shortage to use in the open air, adopt the constant source of the gas of low pressure as propellant, just become a design difficulty.
Summary of the invention
The object of the present invention is to provide a kind of stepper motor Proportional valve, it is by the step motor control valve core rotation, thereby the unlatching of control valve port, close and control flow, but guaranteed that Anesthesia machine is using also proper functioning and the use when driving source of the gas of the constant source of the gas of low pressure.
The objective of the invention is to be achieved through the following technical solutions:
A kind of stepper motor Proportional valve, comprise stepper motor and Proportional valve valve body, have through hole in the middle of the described Proportional valve valve body, and have ventilating hole on the Proportional valve valve body, be provided with the throttle valve spool in the described through hole, described throttle valve spool one end and the fixed installation of step motor shaft one end, and step motor shaft and Proportional valve valve seal are installed, the described throttle valve spool the other end is communicated with the constant source of the gas feeding mechanism of low pressure, and have valve port on the throttle valve spool outer wall, on the described step motor shaft the other end Proportional valve switch and flow control device are installed, described Proportional valve switch and flow control device need guarantee, the unlatching of its unlatching and the lucky corresponding valve port of closed position and the critical localisation of closing.
Further, described Proportional valve switch and flow control device by optical coupler and zero point catch combine, described zero point catch by zero point the catch fixed cover be installed on the step motor shaft, and be placed between the emission, acceptance point of optical coupler, need to guarantee when valve port goes to the transition point of closing, zero point, catch went between the emission, acceptance point of optical coupler just, cut off light beam, made it be converted to electrical signal output.
Further, described valve port is combined by the valve port b of leg-of-mutton valve port a and rectangular configuration, described valve port a is along a side that is arranged in valve port b perpendicular to the direction of step motor shaft, and when valve port a goes to the transition point of closing, zero point, catch went between the emission, acceptance point of optical coupler just, cut off light beam, make it be converted to electrical signal output.
Preferably, described ventilating hole is rectangular configuration with the valve port place of connection, and shape and size are identical with valve port b, and the position is corresponding with valve port b.
Preferably, described step motor shaft is installed with the Proportional valve valve seal by motor seal is stifled, and step motor shaft is with the stifled installation place of motor seal with motor seal is stifled and Proportional valve valve body installation place is provided with seal arrangement.
Preferably, described seal arrangement is seal ring.
Preferably, the constant source of the gas feeding mechanism of described low pressure is turbine.
Preferably, described Proportional valve valve body and throttle valve spool all adopt teflon to make.
Beneficial effect of the present invention is, described stepper motor Proportional valve, it is by step motor control throttle valve valve core rotation, thereby the unlatching of control valve port, closes, but has guaranteed Anesthesia machine also proper functioning and use when using the constant source of the gas of low pressure as propellant; By the angle difference of step motor control throttle valve valve core rotation, make the sectional area difference that valve port is opened on the throttle valve, thereby obtain different tidal volumes; The valve port design of adopting triangle and rectangle to combine, the gas flow calculating that makes the valve port place pass through is more easy, error is little, and when venting pressure is constant, all right effectively control gas flow; The triangle valve port control of small flow of being more convenient for simultaneously, little tidal volume is more accurate for obtaining, and makes that the error between theoretical delivery and the actual flow is near minimum; Ventilating hole and the valve port place of connection adopt rectangular configuration, and shape and size are identical with valve port b, and the sectional area that makes valve port open is convenient to calculate, and assurance is when valve port b forwards to over against ventilating hole simultaneously, and the throttle valve valve port leaves to maximum; Employing optical coupler and the transition point signal that baffle plate obtained the Proportional valve unlatching and closed zero point, its precision is higher, is convenient to calculated flow rate more, and optical coupler also has advantages such as antijamming capability is strong, working stability, long service life simultaneously; Adopt teflon to make Proportional valve valve body and throttle valve spool, its have ageing-resistant, friction factor is low, surface advantage such as viscosity not, make when the throttle valve spool moves reciprocatingly in the Proportional valve valve body more flexibly, material aging and the slow phenomenon of throttle valve valve core rotation can not appear in long-time the use yet; Adopting turbine is the constant source of the gas feeding mechanism of low pressure, and it can guarantee that the low-pressure gas source of exporting is stable and pressure is constant relatively, has satisfied the usage requirement of Anesthesia machine to source of the gas.
Description of drawings
With embodiment the present invention is described in further detail with reference to the accompanying drawings below.
Fig. 1 is the structural representation of stepper motor Proportional valve of the present invention;
Fig. 2 is the structural representation of throttle valve spool in the stepper motor Proportional valve of the present invention;
Fig. 3 is the structural representation of stepper motor Proportional valve closed condition of the present invention;
When Fig. 4 is stepper motor Proportional valve closed condition of the present invention zero point the catch position view;
Fig. 5 is the structural representation of stepper motor Proportional valve opening state of the present invention;
When Fig. 6 is stepper motor Proportional valve opening state of the present invention zero point the catch position view.
Among the figure:
1, stepper motor, 2, the Proportional valve valve body, 3, through hole, 4, ventilating hole, 5, the throttle valve spool, 6, step motor shaft, 7, valve port, 8, valve port a, 9, valve port b, 10, optical coupler, 11, zero point catch, 12, motor seal is stifled, 13, seal ring, 14, zero point the catch fixed cover.
Embodiment
Shown in Fig. 1-4, in the preferred embodiments of the present invention, described stepper motor Proportional valve, comprise stepper motor 1 and Proportional valve valve body 2, have through hole 3 in the middle of the described Proportional valve valve body 2, and have ventilating hole 4 on the Proportional valve valve body 2, be provided with throttle valve spool 5 in the described through hole 3, described throttle valve spool 5 one ends and the fixed installation of step motor shaft 6 one ends, the other end is communicated with the constant source of the gas feeding mechanism of low pressure, and have valve port 7 on throttle valve spool 5 outer walls, on described step motor shaft 6 the other ends Proportional valve switch and flow control device are installed, described step motor shaft 6 is installed by motor seal stifled 12 and 2 sealings of Proportional valve valve body, and step motor shaft 6 and stifled 12 installation places of motor seal and motor seal stifled 12 are provided with seal ring 13 with Proportional valve valve body 2 installation places.
Further, described Proportional valve switch and flow control device by optical coupler 10 and zero point catch 11 combine, described zero point catch 10 by zero point the catch fixed cover 14 be installed on the step motor shaft 6, and be placed between the emission, acceptance point of optical coupler 10, need to guarantee when valve port 7 goes to the transition point of closing, zero point, catch 11 went between the emission, acceptance point of optical coupler 10 just, cut off light beam, made it be converted to electrical signal output.
Further, described valve port 7 is combined by the valve port b9 of leg-of-mutton valve port a 8 and rectangular configuration, described valve port a8 is along a side that is arranged in valve port b9 perpendicular to the direction of step motor shaft 6, and when valve port a8 goes to the transition point of closing, zero point, catch 11 went between the emission, acceptance point of optical coupler just, cut off light beam, make it be converted to electrical signal output.
Further, described ventilating hole 4 is rectangular configuration with valve port 7 places of connection, and shape and size are identical with valve port b9, and the position is corresponding with valve port b9.
Preferably, the constant source of the gas feeding mechanism of described low pressure is turbine.
Preferably, described Proportional valve valve body 2 and throttle valve spool 5 all adopt teflon to make.
During work:
Shown in Fig. 1-4, zero point, catch 11 was placed between the emission, acceptance point of optical coupler 10, and this moment, valve port a8 was in the transition point of closing, and zero point, catch 11 between the emissions of optical coupler 10, acceptance point, cut off light beam just.Start stepper motor 1,, step motor shaft 6 drive catch at zero point 11 clockwise rotate 5 rotations synchronous with it of throttle valve spool, valve port 7 on the throttle valve spool 5 is opened gradually, and turning to valve port b9 zone from valve port a8 zone, valve port 7 openings increase gradually, when zero point, catch 11 went to position shown in Figure 6, valve port 7 goes to valve port b9 place, make valve port b9 and ventilating hole 4 over against, this moment valve port 7 open to maximum, air-flow enters gas path module by throttle valve spool 5.
Shown in Fig. 1,2,5,6, oppositely start stepper motor 1, step motor shaft 6 drive catch at zero point 11 rotate counterclockwise, 5 rotations synchronous with it of throttle valve spool, the valve port 7 on the throttle valve spool 5 is closed gradually, and turns to valve port a8 zone from valve port b9 zone, valve port 7 openings reduce gradually, when zero point, catch 11 went to position shown in Figure 4, zero point, catch 11 between the emissions of optical coupler 10, acceptance point, cut off the light velocity just; This moment, valve port a8 just in time was in the transition point of closing.
Do reciprocal rotation by stepper motor 1 control throttle valve spool 5 by said process, can realize air-breathing function.
Simultaneously, when the required tidal volume of Anesthesia machine hour, also can regulate the rotation angle of stepper motor 1, thereby make the rotation angle of throttle valve spool 5 reduce, only open the less valve port a8 of sectional area, ventilate, guarantee that the required value than Low tidal volume is more accurate.
Described stepper motor Proportional valve, it is by the step motor control valve core rotation, thereby the unlatching of control valve port, closes and control flow, but has guaranteed Anesthesia machine also proper functioning and use when using low-pressure gas source as propellant.

Claims (8)

1. stepper motor Proportional valve, comprise stepper motor (1) and Proportional valve valve body (2), it is characterized in that: have through hole (3) in the middle of the described Proportional valve valve body (2), and have ventilating hole (4) on the Proportional valve valve body (2), be provided with throttle valve spool (5) in the described through hole (3), described throttle valve spool (5) one ends and the fixed installation of step motor shaft (6) one ends, and step motor shaft (6) is installed with Proportional valve valve body (2) sealing, described throttle valve spool (5) the other end is communicated with the constant source of the gas feeding mechanism of low pressure, and have valve port (7) on throttle valve spool (5) outer wall, on described step motor shaft (6) the other end Proportional valve switch and flow control device are installed, described Proportional valve switch and flow control device need guarantee, the unlatching of the lucky corresponding valve port of its unlatching and closed position (7) and the critical localisation of closing.
2. stepper motor Proportional valve according to claim 1, it is characterized in that: described Proportional valve switch and flow control device combine by optical coupler (10) and catch at zero point (11), described catch at zero point (11) is installed on the step motor shaft (6) by catch fixed cover at zero point (14), and be placed between the emission, acceptance point of optical coupler (10), need to guarantee when valve port (7) goes to the transition point of closing, catch at zero point (11) goes between the emission, acceptance point of optical coupler (10) just, cut off light beam, make it be converted to electrical signal output.
3. according to claim 1 or 2 each described stepper motor Proportional valves, it is characterized in that: described valve port (7) is combined by the valve port b (9) of leg-of-mutton valve port a (8) and rectangular configuration, described valve port a (8) is along a side that is arranged in valve port b (9) perpendicular to the direction of step motor shaft (6), and when valve port a (8) goes to the transition point of closing, catch at zero point (11) goes between the emission, acceptance point of optical coupler (10) just, cut off light beam, make it be converted to electrical signal output.
4. stepper motor Proportional valve according to claim 1, it is characterized in that: described ventilating hole (4) is rectangular configuration with valve port (7) place of connection, and shape and size are identical with valve port b (9), the position is corresponding with valve port b (9).
5. stepper motor Proportional valve according to claim 1, it is characterized in that: described step motor shaft (6) is installed by motor seal stifled (12) and Proportional valve valve body (2) sealing, and step motor shaft (6) is provided with seal arrangement with stifled (12) installation place of motor seal and motor seal stifled (12) with Proportional valve valve body (2) installation place.
6. stepper motor Proportional valve according to claim 5, it is characterized in that: described seal arrangement is seal ring (13).
7. stepper motor Proportional valve according to claim 1, it is characterized in that: the constant source of the gas feeding mechanism of described low pressure is turbine.
8. stepper motor Proportional valve according to claim 1, it is characterized in that: described Proportional valve valve body (2) and throttle valve spool (5) all adopt teflon to make.
CN2011104564758A 2011-12-30 2011-12-30 Stepping motor proportioning valve Pending CN103185160A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011104564758A CN103185160A (en) 2011-12-30 2011-12-30 Stepping motor proportioning valve

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Application Number Priority Date Filing Date Title
CN2011104564758A CN103185160A (en) 2011-12-30 2011-12-30 Stepping motor proportioning valve

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103899791A (en) * 2014-04-11 2014-07-02 西安交通大学 Proportional flow rotary valve for alternating-current servo motor direct drive type unloading

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2109477U (en) * 1991-12-06 1992-07-08 浙江工学院 Ratio throttle valve for by-pass pressure adjusting
CN101745168A (en) * 2008-12-01 2010-06-23 北京谊安医疗系统股份有限公司 Proportioning valve

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2109477U (en) * 1991-12-06 1992-07-08 浙江工学院 Ratio throttle valve for by-pass pressure adjusting
CN101745168A (en) * 2008-12-01 2010-06-23 北京谊安医疗系统股份有限公司 Proportioning valve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103899791A (en) * 2014-04-11 2014-07-02 西安交通大学 Proportional flow rotary valve for alternating-current servo motor direct drive type unloading

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Application publication date: 20130703

RJ01 Rejection of invention patent application after publication