CN201906321U

CN201906321U - Gas control valve for anesthesia machine

Info

Publication number: CN201906321U
Application number: CN2010206965513U
Authority: CN
Inventors: 金昌�; 郑殿会
Original assignee: Beijing Aeonmed Co Ltd
Current assignee: Beijing Aeonmed Co Ltd
Priority date: 2010-12-31
Filing date: 2010-12-31
Publication date: 2011-07-27
Anticipated expiration: 2020-12-31

Abstract

The utility model provides a gas control valve for an anesthesia machine, which comprises an upper valve assembly, a lower valve assembly and a pressure transfer mechanism which is arranged between the upper valve assembly and the lower valve assembly. The upper valve assembly comprises a first valve seat (31), a first spool (2) and a force transfer device (6). The lower valve assembly comprises a second valve seat (14) and a first throttle valve (51), wherein the second valve seat (14) is provided with a first gas path, a second gas path, a second gas inlet (21) and a second gas outlet (22). The pressure transfer mechanism is controlled to act under the pressure of gas in the gas paths of the upper valve assembly and the lower valve assembly, the gas throughput of the valve port of the upper valve assembly is controlled and finally the flow ratio of two different kinds of gases can be controlled. Therefore, the goal of stably and reliably controlling the gas inlet proportions of the two kinds of gases is achieved.

Description

The anesthetic machine Pneumatic valve

Technical field

This utility model relates to a kind of anesthetic machine Pneumatic valve.

Background technology

When using anesthetic machine, need with oxygen and anesthetis for example laughing gas flow to patient then according to predetermined mixed.Requirement to this ratio is very strict, no matter is that oxygen concentration is too high, or the laughing gas excessive concentration, to may patient's health and even life being constituted a threat to.Even after anesthetic machine is by life-time service, it is stable that this ratio preferably remains.But the control valve of anesthetic machine does not then reach above-mentioned requirements at present, control valve oxygen behind life-time service is laughed at than meeting and skew occurred, the logical relation that oxygen, laughing gas are opened can change, be that laughing gas is opened under the situation that oxygen is not opened, directly cause patient's anoxia asphyxia, jeopardize patient's life security.

The utility model content

Therefore this utility model proposes a kind of Pneumatic valve, to overcome existing Pneumatic valve not enough defective of stability when controlling two kinds of gas air inlet ratios.

Pneumatic valve of the present utility model comprises three parts from top to bottom: go up valve module, air pressure transmission mechanism and following valve module.Last valve module comprises: first valve seat, be provided with first air inlet, first gas outlet, first cavity, be positioned at second cavity of first cavity below, and first valve port between first cavity and second cavity, first cavity is communicated to first air inlet, and second cavity is communicated with the upside of first gas outlet and air pressure transmission mechanism; First spool is positioned at first cavity (312), have the first valve port auxiliary section, and the upper end is supported by first spring; And load transfer device, be positioned at second cavity, between the air pressure transmission mechanism and first valve port, and the upper end is connected to the lower end of first spool.Following valve module comprises: second valve seat, be provided with first air flue, second air flue, second air inlet and second gas outlet, first air flue is communicated to the downside of air pressure transmission mechanism with second air inlet, and second air flue is communicated to second gas outlet downside of air pressure transmission mechanism; The first throttle valve is arranged in second air flue, controls the air-flow size of second air flue.

In a kind of specific embodiment, the air pressure transmission mechanism comprises: first air chamber, and the primary diaphragm that it is provided with first push pedal and is supported by this push pedal, first air chamber is communicated with second cavity; Second air chamber is located at first air chamber below, and the secondary diaphragm that is provided with second push pedal and is supported by this push pedal, and second air chamber is communicated with second air flue and second gas outlet; And connecting rod, its two ends are fixedly attached to first push pedal and second push pedal, the feasible driving that is subjected to the air pressure in first air chamber or second air chamber, and first push pedal and second push pedal can link in air chamber separately.

Preferred as to above-mentioned variety of way, load transfer device comprises: push rod, it is located in second cavity, and the upper end is connected to the lower end of first spool, and the lower end is supported in first push pedal; Second spring, it is arranged in push rod, and is positioned at the spacing space with predetermined length, and the lower end is towards primary diaphragm.

Preferred as to above-mentioned variety of way, load transfer device also comprises spring base, and its lower surface is supported in first push pedal, and upper surface is supported second spring and push rod.

Preferred as to above-mentioned variety of way, primary diaphragm and secondary diaphragm are for rolling film, and the periphery that rolls film has recessed cannelure.

Preferred as to above-mentioned variety of way, the area of second push pedal is greater than the area of first push pedal.

Preferred as to above-mentioned variety of way, second choke valve is arranged on the path of second cavity to the first gas outlet.

Preferred as to above-mentioned variety of way has a spring base storage tank at the adjoiner of second cavity and first air chamber, and this storage tank has predetermined altitude, the maximum moving range of restraining spring seat.

Preferred as to above-mentioned variety of way, last valve module also comprises a mount pad, its screw thread adjustable ground is installed in first valve seat, and first cavity and first valve port are to be formed by mount pad.

Preferred as to above-mentioned variety of way, the upper end of first spring be supported on one first valve stifled on.

The Pneumatic valve of above-mentioned variety of way can also comprise a clamp nut, and the upper end of extending first valve seat that it is engaged in mount pad is used for mount pad is fastened on first valve seat.

This utility model also provides a kind of anesthetic machine that comprises above-mentioned Pneumatic valve.

Pneumatic valve of the present utility model can reliablely and stablely be controlled two kinds of transfer of gas ratios.This valve is used for anesthetic machine, can prevents that oxygen/laughing gas is than the out of control and safety urgent patient.

Description of drawings

Fig. 1 is the cutaway view of the Pneumatic valve of an exemplary embodiments of this utility model;

Fig. 2 is the schematic appearance of Pneumatic valve shown in Figure 1;

Fig. 3 is a kind of installation diagram that is used for flow control assembly of the present utility model.

The specific embodiment

Fig. 1 and 2 illustrates first embodiment of the present utility model.As illustrated in fig. 1 and 2, on function, Pneumatic valve can be divided into from top to bottom three parts: go up valve module, air pressure transmission mechanism and following valve module.Correspondingly, the body of Pneumatic valve is made of three parts, i.e. upper valve base 31 (first valve seat), middle valve seat 9 and lower valve base 14 (second valve seat).In other embodiments, also can these three valve seats are one-body molded.

The air pressure transmission mechanism comprises first air chamber 34, second air chamber 35 and connecting rod 11, and wherein, first air chamber 34 is provided with first push pedal 8 and rolls film 7 by first of this push pedal support; Second air chamber 35 is located at first air chamber, 34 belows abreast, and is provided with second push pedal 13 and rolls film 12 by second of this push pedal support; Connecting rod 11 two ends are fixedly attached to first push pedal 8 and second push pedal 13, the feasible driving that is subjected to the air pressure in first air chamber 34 or second air chamber 35, and first push pedal 8 and second push pedal 13 can be moved (interlock) in air chamber inter-sync separately.As preferred setting, the area of second push pedal 13 is greater than the area of first push pedal 8, because second air chamber is under identical pressure, the area that increases second push pedal 13 just increases thrust upwards, that is, the pressure that can reduce second air chamber under certain upward pressure prerequisite by the method that increases effective area is realized.The pressure of second air chamber reduces to increase the adjustment valve latus rectum of second air chamber under the identical flow of anesthetic machine effusion meter, and the purpose that increases the adjustment valve of second air chamber is to guarantee oxygen under the prerequisite of the certain aperture of effusion meter needle-valve, guarantees the maximum stream flow of oxygen.

Last valve module comprises first valve seat 31, first spool 2 and load transfer device 6, wherein, first valve seat 31 is provided with first air inlet 26, first gas outlet 27, first cavity 312, second cavity 313 and first valve port 311 between first cavity 312 and second cavity 313, first cavity 312 is communicated to first air inlet, 26, the second cavitys 313 and is communicated with first gas outlet 27 and first air chamber 34; First spool 2 has the first valve port auxiliary section, and the upper end is supported by first spring 28; Load transfer device 6 upper ends are connected to the lower end of first spool 2, and the lower end is supported in first push pedal 8.

Following valve module comprises second valve seat 14 and first throttle valve 51.Second valve seat 14 is provided with first air flue, second air flue, second air inlet 21 and second gas outlet 22.Wherein, first air flue is communicated with second air chamber 35 and second air inlet, 21, the second air flues are communicated with second air chamber 35 and second gas outlet 22.First throttle valve 51 is arranged in second air flue, controls the air-flow size of second air flue.

Load transfer device 6 comprises push rod 61, second spring 62 and spring base 63, and wherein, push rod 61 upper ends are connected to the lower end of first spool 2, and the lower end is dropped in the spring base 63; Second spring 62 is arranged in push rod 61, and is positioned at the spacing space 64 with predetermined length; The lower surface of spring base 63 is supported in first push pedal 8, and upper surface is supported second spring 62 and push rod 61.Push rod 61 and spring base 63 can be one-body molded.In the preferred embodiment, have a spring base storage tank 65 at the adjoiner of second cavity 313 and first air chamber 34, this storage tank 65 has predetermined altitude, the maximum moving range of restraining spring seat.

Second valve seat 14 also is equipped with flow control assembly 51.The effect of this Control Component is, is used for regulating the oxygen initial pressure of second air chamber, after the adjustment of oxygen initial pressure, can carry out follow-up oxygen laugh at than adjusting.In embodiment shown in Figure 3, flow control assembly (choke valve) 51 comprises valve rod base 511 and valve rod 512, wherein, valve rod base 511 embeds second valve seat 14, and form the 4th cavity, first end of valve rod base 511 is provided with the 4th valve port 511a, and the outside of the 4th valve port 511a is communicated to second gas outlet 22, and the 4th cavity is communicated to second air chamber 35 by the perforate on the sidewall; Valve rod 512 screw threads are arranged in the 4th cavity that valve rod base 511 forms, and first end has the conical surface, is used to regulate the open area of the 4th valve port 511a, and second end extends second valve seat 14, and are provided with and can twist the position.Turn this and can twist the position, can regulate the degree of depth that regulating valve stem 512 enters valve rod base 511, and then regulate the open area of the 4th valve port 511a.In position, adopts the sealing between two sealing rings, 513 realization valve rods 512 and the valve rod base near second end of valve rod 512.Valve rod 512 advances deeplyer, the open area of the 4th valve port 511a is littler, even but valve rod 512 enters depth capacity, valve port 511a also is in opening, is only flow to the air-flow minimum of second gas outlet via the 4th cavity and the 4th valve port 511a by second air chamber 35.This flow control assembly 51 matches with an other effusion meter control valve, is used to control the air pressure of second air chamber 35.This effusion meter control valve is not shown in the accompanying drawings, and it is connected on the pipeline from source of the gas to second air inlet, as the part of effusion meter, also can be independent controlling valve.

As shown in Figure 3, first valve seat 31 also is equipped with auxiliary flow Control Component 52, and this device is used to regulate the size that flows to the air-flow of first gas outlet 27 from second cavity 313.As shown in Figure 1, it can be packed into from the perforate 25 of first valve seat 31.The structure of this device can be identical with above-mentioned flow control assembly 51.Also show

sealing ring

1,4,18,23,29 among Fig. 4, in other embodiments, these sealing rings can omit.

As second embodiment of the present utility model (do not have diagram), the air pressure transmission mechanism among first embodiment can be simplified, it only comprises an air chamber, and a push pedal to be set in this air chamber and to be supported in this push pedal be to roll film.The upside air cavity of push pedal is communicated with second cavity 313, and the downside air cavity is communicated with the first air flue connected sum, second air flue.The upper surface of push pedal is supported above-mentioned load transfer device, for example, supports the push rod 61 among first embodiment.Have at load transfer device under the situation of above-mentioned spring base 63, it supports spring base.This air chamber is normally formed by first valve seat and the cooperation of second valve seat.

Further preferred as to above-mentioned various embodiments, last valve module also comprises a mount pad 32, but its threaded adjusting be installed in first valve seat, 31, the first cavitys 312 and first valve port 311 is to be formed by mount pad 32.The upper end of first spring 28 is supported on one first valve stifled 30, and stifled 30 screw threads of this first valve are installed in the upper end of mount pad 32.Last valve module also comprises clamp nut 33, is engaged in the upper end of extending first valve seat 31 of mount pad 32, is used for mount pad 33 is fastened on first valve seat 31.

Pneumatic valve of the present utility model in use, first advances (going out) QI KOU and second advances (going out) QI KOU and is used for into and out of different gas, be example with the anesthetic machine that comprises the first embodiment Pneumatic valve below, its operation principle is described, wherein, first advances (going out) QI KOU is used to pass in and out laughing gas, and second advances (going out) QI KOU is used to into (going out) oxygen.

When oxygen air inlet (second air inlet) 21 does not have air inlet, because the power that laughing gas inlet valve spring 28 (first spring) compression produces makes the sealing ring 3 on first spool 2 cooperate with the air inlet valve body, first valve port 311 blocks, and the laughing gas body can not be entered in second cavity 313 by first cavity 312

After oxygen has flow, along with the increase of amount, because of adjusting the effect of damming of valve 51, pressure in second air chamber 35 increases, after pressure was elevated to a fixed point, second push pedal, 13 promotion diaphragms, middle fore-set 11, push rod 5 moved up, and laughing gas intake valve spool 2 is opened; By the control and the power of regulating inlet valve spring 28, required oxygen flow in the time of can controlling the laughing gas body and open.

Go deep into the upper valve body distance by adjusting laughing gas intake valve integral body, can be set under the corresponding oxygen flow open amount of laughing gas.

After the valve method mouth of the flow control assembly 51 of oxygen is fixing, open size, i.e. its corresponding proportionate relationship of scalable by the valve port of regulating auxiliary flow Control Component 52.

After the pressure in second air chamber 35 reaches certain numerical value; can constantly promote to move on laughing gas intake valve 2 spools 2; 28 compressions of laughing gas inlet valve spring; ladder place and upper valve body 33 grooves up to push rod 61 collide (for example spring base 63 upper surfaces support last storage tank 65); the laughing gas valve port is opened into maximum; guaranteed the sectional area of laughing gas inlet open, protected laughing gas inlet valve spring (first spring) excess compression simultaneously and be damaged.

This valve needs to regulate each parts after assembling is finished, and refills on the anesthetic machine and can use.Be example explanation debug process with one group of concrete numerical value below: (1) is regulated oxygen and is adjusted valve 51, and making cavity 35 internal pressures is 25mbar; (2) regulate laughing gas intake valve mount pad 32 and enter the degree of depth, make the laughing gas flow about 0.05L/min, re-adjustment locking nut 33 is locked the laughing gas intake valve.(4) regulating anesthetic machine effusion meter oxygen knob, to make oxygen flow be 1L/min, at this moment, regulates laughing gas control valve 52, and making the laughing gas flow is 3L/min, guarantees that the volume flow of oxygen laughing gas output is 1: 3.More than concrete data only be exemplary, can set by calculating according to concrete needs.

More than be example with the anesthetic machine, exemplify structure and principle that Pneumatic valve of the present utility model has been described.This utility model is not limited to anesthetic machine, and this utility model can be used for all application scenarios that need need strictness, stable control to the air inlet ratio of gas with various.

Although use the term first, second, third, etc. to describe different elements, member, zone, layer and/or part herein, these elements, member, zone, layer and/or part are not limited to these terms.These terms only are used for an element, member, zone, layer or part are distinguished mutually with another element, member, zone, layer or part.Therefore, under the situation that does not deviate from this utility model aim, first element hereinafter, member, zone, layer or part can be called second element, member, zone, layer or part.

In addition, for convenience of explanation, this paper may use such as " ... under ", " ... following ", " ... top ", " on ... " and " down ... " spatial relationship term of waiting, with the description element as shown in FIG. or the relation of mechanism and another element or mechanism.Should be appreciated that except that the orientation shown in the figure spatial relationship term will comprise the various orientation of the device in use or the operation.For example, if the device shown in the flipchart, then be described as be in other elements or mechanism " following " or " under " element will be positioned in " top " of other elements or mechanism.Therefore, for example " ... following " should be included in orientation top and below.

Be preferred embodiment of the present utility model only below, be not limited to this utility model, for a person skilled in the art, this utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.

Claims

1. an anesthetic machine Pneumatic valve is characterized in that, comprises valve module, following valve module and between the air pressure transmission mechanism between them, wherein,

The described valve module of going up comprises:

First valve seat (31), be provided with first air inlet (26), first gas outlet (27), first cavity (312), be positioned at second cavity (313) of first cavity (312) below, and be positioned at first valve port (311) between first cavity (312) and second cavity (313), described first cavity (312) is communicated to first air inlet (26), described second cavity (313) is communicated with the upside of first gas outlet (27) and described air pressure transmission mechanism

First spool (2) is positioned at described first cavity (312), has the first valve port auxiliary section, and the upper end supported by first spring (28), and

Load transfer device (6) is positioned at described second cavity (313), and between described air pressure transmission mechanism and described first valve port, and the upper end is connected to the lower end of described first spool (2);

Described valve module down comprises:

Second valve seat (14), be provided with first air flue, second air flue, second air inlet (21) and second gas outlet (22), described first air flue is communicated to the downside of described air pressure transmission mechanism with second air inlet (21), and described second air flue is communicated to second gas outlet (22) downside of described air pressure transmission mechanism;

First throttle valve (51) is arranged in described second air flue, controls the air-flow size of described second air flue.

2. anesthetic machine Pneumatic valve according to claim 1 is characterized in that, described air pressure transmission mechanism comprises:

First air chamber (34), the primary diaphragm (7) that is provided with first push pedal (8) and supports by this push pedal, first air chamber (34) is communicated with described second cavity (313);

Second air chamber (35) is located at described first air chamber (34) below, and the secondary diaphragm (12) that is provided with second push pedal (13) and is supported by this push pedal, and second air chamber (35) is communicated with described second air flue and second gas outlet (22); And

Connecting rod (11), two ends are fixedly attached to described first push pedal (8) and second push pedal (13), the feasible driving that is subjected to the air pressure in described first air chamber (34) or second air chamber (35), described first push pedal (8) and second push pedal (13) can link in air chamber separately.

3. anesthetic machine Pneumatic valve according to claim 2 is characterized in that, described load transfer device (6) comprising:

Push rod (61) is located in described second cavity (313), and the upper end is connected to the lower end of described first spool (2), and the lower end is supported in described first push pedal (8);

Second spring (62) is arranged in described push rod (61), and is positioned at the spacing space (64) with predetermined length, and the lower end is towards described primary diaphragm (7).

4. anesthetic machine Pneumatic valve according to claim 3 is characterized in that, described load transfer device (6) also comprises:

Spring base (63), lower surface are supported in described first push pedal (8), and upper surface is supported described second spring (62) and push rod (61).

5. anesthetic machine Pneumatic valve according to claim 2 is characterized in that, described primary diaphragm (7) and secondary diaphragm (12) are for rolling film, and the described periphery that rolls film has recessed cannelure.

6. anesthetic machine Pneumatic valve according to claim 2 is characterized in that, the area of described second push pedal (13) is greater than the area of first push pedal (8).

7. anesthetic machine Pneumatic valve according to claim 1 is characterized in that, described second choke valve (52) is arranged on described second cavity (313) to the path of first gas outlet (27).

8. anesthetic machine Pneumatic valve according to claim 4, it is characterized in that, adjoiner at described second cavity (313) and first air chamber (34) has a spring base storage tank (65), and this storage tank (65) has predetermined altitude, limits the maximum moving range of described spring base.

9. according to each described anesthetic machine Pneumatic valve of claim 1 to 8, it is characterized in that, the described valve module of going up also comprises a mount pad (32), its screw thread adjustable ground is installed in described first valve seat (31), and described first cavity (312) and first valve (311) are to be formed by described mount pad (32).

10. anesthetic machine Pneumatic valve according to claim 9 is characterized in that, the upper end of described first spring (28) is supported on one first valve stifled (30).

11. anesthetic machine Pneumatic valve according to claim 10, it is characterized in that, also comprise clamp nut (33), be engaged in the upper end of described first valve seat of extending of described mount pad (32) (31), be used for described mount pad (33) is fastened on described first valve seat (31).