CN101219249B - Pressure-limiting valve - Google Patents
Pressure-limiting valve Download PDFInfo
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- CN101219249B CN101219249B CN2007103023556A CN200710302355A CN101219249B CN 101219249 B CN101219249 B CN 101219249B CN 2007103023556 A CN2007103023556 A CN 2007103023556A CN 200710302355 A CN200710302355 A CN 200710302355A CN 101219249 B CN101219249 B CN 101219249B
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Abstract
The invention relates to a pressure limiting valve comprising a fixing part which is fixed on a device ready for pressure limitation and provided with an air inlet and an air outlet, and a mobile part. The mobile part comprises a first part which can be rotated relative to the fixing part, a second part which is pressed on the air outlet of the fixing part and can be vertically moved relative to the first part, and a third part which is sleeved on the first part and can be vertically moved relative to the first part. Furthermore, a spring is arranged between the third part and the second part. The pressure limiting valve of the invention has the advantages that the invention is a blend of accurate pressure adjustment and fast removal function, thus ensuring the precision of pressure adjustment and well protecting airways of patients. The invention has simple operation and convenience; moreover, a waste discharging outlet does not need to be separately connected with a pipe, thus saving pipe parts and eliminating a fault point of leakage; the pressure limiting valve is easy to be assembled, disassembled, cleaned and sterilized.
Description
Technical field
The present invention relates to a kind of pressure limiting valve, specifically, relate to a kind of absorption circuit gas pressure limiting valve (APL valve) that is used for medical anesthetic machine.
Background technology
At present, anesthetic machine is the important apparatus when implementing anesthesia surgery, and the anesthesia doctor utilizes it to reach the purpose of anesthesia and curing patient.Absorption circuit is that anesthetic machine realization circulating clamping closed type is anaesthetized indispensable important device.The weak point of the absorption circuit gas pressure limiting valve of anesthetic machine is at present: can only be the pressure trend adjustment in 0～7kpa pressure limit, clearly not mark force value and show, be unfavorable for that the anaesthetist is provided with airway pressure limits value accurately; There is not the fast row function of gas, particularly when art pre-induction and postoperative recovery,, there is not fast row function easily patient airway to be caused damage if when patient airway pressure moment is too high, and the anaesthetist can only reduce patient airway pressure by disconnecting pipeline, and operation is inconvenience very; The waste discharge mouth of the pressure limiting valve waste discharge pipeline of need plugging into separately.
Summary of the invention
The present invention is devoted to overcome the above-mentioned defective of prior art just and makes.The objective of the invention is to propose a kind of pressure limiting valve, this pressure limiting valve can accurately be regulated force value, and has fast row function.
The invention provides a kind of pressure limiting valve, comprising: fixed part, be fixed on the device for the treatment of pressure limiting, be provided with air inlet and air vent; Movable part comprises: first, and rotatable with respect to fixed part; Second portion presses on the air inlet of fixed part, and can vertically move with respect to first; Third part is sheathed in the first, and can vertically move with respect to first, is provided with spring between third part and the second portion.
Preferably, fixed part comprises: valve seat, be arranged at the bottom of pressure limiting valve, and have air inlet and air vent; And inner shell, being fixed in valve seat, the third part of movable part is the screw thread guide, the screw thread guide is provided with external screw thread, and engages with the inwall of inner shell by external screw thread.
Preferably, the inwall of inner shell is provided with the hole that holds ball, and ball engages with the external screw thread of screw thread guide.
Preferably, the inwall of inner shell is provided with the female thread that engages with the external screw thread of screw thread guide.
Preferably, the first of movable part comprises: shell is set in the outside of inner shell; The stroke guide rod is fixed on the shell and downwards and extends; The second portion of movable part is a spool, and disc is arranged to cover the air inlet of valve seat in the bottom of spool, and the top of spool is guide post, partly is arranged at by back-up ring in the inner chamber of stroke guide rod.
Preferably, the guide post of spool is provided with one or a plurality of arcual protuberance that separates each other, and described protuberance matches with the inner chamber of stroke guide rod.
Preferably, the stroke guide rod longitudinally is arranged to stepped, and the screw thread guide post engages with the larger-size part of stroke guide rod, is provided with back-moving spring between the end difference of inner shell and stroke guide rod.
Preferably, shell is provided with the first slope boss, and inner shell is provided with the second slope boss with the corresponding position of the first slope boss, and the position of the first slope boss is arranged to and can be raise by the second slope boss.
Preferably, the outside lower end of shell is provided with scale, and pressure limiting valve further comprises: the scale keeper, be fixed on the inner shell, and shape is corresponding with the shape that is provided with graduated part of shell, and the scale keeper is provided with the positioning mark point.
Preferably, pressure limiting valve further comprises position indicating mechanism, and position indicating mechanism comprises: pedestal is fixedly set on the inner shell; Spring, an end are fixed in the inner chamber of pedestal; And pin, to fixedly connected with the other end of spring, and partly protrude in outside the pedestal, the inwall of shell is provided with and the corresponding recess of the scale of pin and shell.
Preferably, pressure limiting valve further comprises position indicating mechanism, and position indicating mechanism is the circular arc shape, and along being fixedly set on the inner shell to the small part outer peripheral edges of inner shell, and position indicating mechanism is provided with elastic protrusion in edge; The inwall of shell is provided with and the projection of position indicating mechanism and the corresponding recess of scale of shell.
Advantage of the present invention is: integrate accurate pressure adjustment and fast row function, guaranteed the degree of accuracy that pressure is adjusted, patient airway is played a very good protection; Simple to operate, convenient; And the waste discharge mouth does not need the pipeline of plugging into separately, has saved the pipeline part, has eliminated a leakage failure point; Be convenient to install, dismantle, clean, sterilize.
Should be appreciated that above generality is described and the following detailed description is all enumerated and illustrative, purpose is for to the claimed further instruction that the invention provides.
Description of drawings
Accompanying drawing is formed the part of this description, so that help further to understand the present invention.These accompanying drawings illustrate some embodiments of the present invention, and can be used for illustrating principle of the present invention with description.In the accompanying drawing:
Fig. 1 is the cutaway view according to pressure limiting valve of the present invention.
Fig. 2 is the front view according to pressure limiting valve of the present invention.
Fig. 3 is the sketch map according to a kind of position indicating mechanism of pressure limiting valve of the present invention.
Fig. 4 is the sketch map according to the another kind of position indicating mechanism of pressure limiting valve of the present invention.
Fig. 5 is the exploded perspective view according to pressure limiting valve of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.Identical in the accompanying drawings parts are represented with identical label.
With reference to Fig. 1-5, the accurate adjustable pressure limiting valve of pressure according to the present invention comprises: parts such as shell 1, inner shell 2, screw thread guide 3, scale locating piece 4, nut 5, valve seat 6, spool 7, stroke guide rod 8, back-moving spring 9, compression spring 10, copper back-up ring 11, steel ball 12, position indicating mechanism 13, waste discharge air flue 14, loop air flue 15, the ejector pin 16 of living, spring 17, inner shell pin alive pedestal 18.
With reference to accompanying drawing, shell 1, inner shell 2, screw thread guide 3, scale locating piece 4 all adopt high temperature-resistant disinfected medical engineering mould of plastics processing and forming form (also can adopt other material and processing method, as: aluminium machined etc.).Nut 5, valve seat 6, spool 7, stroke guide rod 8, back-moving spring 9, compression spring 10 all adopt stainless steel material to process.
The outer surface relevant position of shell 1 indicates the scale value that the pressure correspondence is arranged.3 steel balls 12 of uniform distribution on inner shell 2 circumference, circular hole is corresponding with 3 head threads of screw thread guide 3, steel ball in thread groove, roll (screw thread guide 3 can be made the form of other bull regular screw threads such as double end, four-head, trapezoidal thread according to the design needs), make the rotation of screw thread guide 3 change into rectilinear motion, scale locating piece 4 is fixedlyed connected with inner shell 2, a positioning mark point 20 is arranged on the scale locating piece 4, play the indicated pressure value.When shell rotated, the numerical value that overlaps with positioning mark point 20 on the scale locating piece 4 on the shell 1 was exactly the pressure value of setting.For example, pressure value of setting of pressure limiting valve as shown in Figure 2 is 7kpa.
Air inlet and air vent are arranged on the pressure limiting valve valve seat 6, be assembled on the loop, communicate with loop air flue 15, waste discharge air flue 14 respectively.The bottom of spool 7 is set to disc, thereby can be so that being sealed and matched of the air inlet of valve seat 6 and spool 7 guarantees good sealing property.In addition, the top of spool 7 is provided with guide post, and this guide post partly inserts in the inner chamber of stroke guide rod 8 by back-up ring 11.It is the protuberance 71,72 of semicircular arc that guide post is provided with two that separate each other and revolution sections, and good guide when making the guide post of spool 7 contact with the inner chamber of stroke guide rod 8 has reduced friction area simultaneously again.
With reference to Fig. 1, in use, shell 1 can drive stroke guide rod 8 by bayonet arrangement and rotatablely move or axial linear movement.Stroke guide rod 8 cooperates with spool 7 by copper back-up ring 11, and spool 7 can slide up and down in the inner chamber of stroke guide rod 8 flexibly by its guide post.
As shown in Figure 1, be arranged at an end difference place on the top of stroke guide rod when back-moving spring 9, play fast row's reset response.Compression spring 10 is arranged between the upper wall and spool 7 of square hole of screw thread guide 3, by regulating the decrement of compression spring 10, can play the pressure Accommodation.
When rotational shell 1, shell 1 drives stroke guide rod 8 and rotates, because stroke guide rod 8 is assemblied in the prismatic hole of screw thread guide 3, rotates in the inner chamber of inner shell 2 so stroke guide rod 8 drives screw thread guide 3.Under the effect of the steel ball 12 of 3 fixed-site, screw thread guide 3 follows journey guide rod 8 and does rectilinear motion, change the decrement of compression spring 10, thereby the pressure that makes spool 7 act on valve seat 6 valve ports changes, so the airway pressure limits value changes thereupon.Screw thread guide 3 can on when moving to the top of inner shell 2, maybe can be displaced downwardly to 3 steel ball places of inner shell 2, making compression spring 10 be in does not respectively have compression, or the decrement maximum rating, is that 0～7kpa is adjustable continuously thereby reach the pressure limit value.Force value indicates according to design and demarcates, and the user is the set pressure value as required, as what this example indicated is: 0,5,10,30,50,70, and unit is 100pa or cmH2O, and all there is the position indicating function at each scale place.
In addition, also can realize fast row function.Specifically, when pressure limiting valve is set up to a certain any force value, be pulled upwardly shell 1, shell 1 drives stroke guide rod 8 and moves up, and stroke guide rod 8 drives on the spool 7 by copper back-up ring 11 and moves, its valve port with valve seat 6 is separated, gas in the air flue is discharged fast, has realized the fast row function of optional position, when unclamping shell 1, under the effect of back-moving spring 9, spool 7 resets.
In addition, also be provided with position indicating mechanism according to pressure limiting valve of the present invention, so as to make the user at rotational shell 1 so that the user can feel and hear the prompting that this position indicating mechanism provides when regulating pressure.
With reference to Fig. 3, position indicating mechanism can comprise: pedestal 18 is fixedly set on the inner shell 2; Spring 17, one ends are fixed in the inner chamber of pedestal 18; And sell 16, and to fixedly connected with the other end of spring 17, and partly protrude in outside the pedestal 18, the inwall of shell 1 is provided with and the corresponding recess 22 of the scale of pin 16 and shell 1.When rotational shell 1, the pin 16 of the position indicating mechanism on the inner shell 2 slides on the inwall of shell 1, and sends the sound, plays scale position voice prompt function.
With reference to Fig. 4, position indicating mechanism can also be another kind of form, for example, position indicating mechanism 13 is the circular arc shape, and along being fixedly set on the inner shell 2 to the small part outer peripheral edges of inner shell 2, and position indicating mechanism 13 is provided with elastic protrusion 131 in edge, and the inwall of shell 1 is provided with and the projection 131 of position indicating mechanism 13 and the corresponding recess 22 of scale of shell 1.When rotational shell 1, the projection 13 of the position indicating mechanism on the inner shell 2 is slided on the inwall of shell 1, and sends the sound, plays scale position voice prompt function.
Although the present invention is illustrated with reference to accompanying drawing and preferred embodiment, obviously, for a person skilled in the art, under the prerequisite that does not deviate from the spirit and scope of the present invention, can make various changes and variation to the present invention.For example, though the pressure adjusting range of the pressure limiting valve that present embodiment is enumerated is 0～7kpa, but, also can be designed to pressure limiting valve according to application need with the pressure adjusted value of other any range of fast row function, only need the pressure design of change compression spring 10 promptly can realize.Therefore, various change of the present invention, the content that changes by appending claims and equivalent thereof contain.
Claims (10)
1. a pressure limiting valve is characterized in that, comprising:
Fixed part (2,6) is fixed on the device for the treatment of pressure limiting, is provided with air inlet and air vent;
Movable part (1,8,3,7,11) comprising:
First (1,8), rotatable with respect to described fixed part (2,6);
Second portion (7) presses on the air inlet of described fixed part (6), and can vertically move with respect to described first;
Third part (3) is sheathed in the described first, and can vertically move with respect to described first (8), is provided with spring (10) between described third part (3) and the described second portion (7),
Described fixed part comprises:
Valve seat (6) is arranged at the bottom of described pressure limiting valve, has described air inlet and described air vent; And
Inner shell (2) is fixed in described valve seat (6),
The first of described movable part (1,8) comprising:
Shell (1) is set in the outside of described inner shell (2);
Stroke guide rod (8) is fixed in described shell (1) and goes up also extension downwards;
Described stroke guide rod (8) longitudinally is arranged to stepped, and the third part of described movable part engages with the larger-size part of described stroke guide rod (8), is provided with back-moving spring (9) between the end difference of described inner shell (2) and described stroke guide rod (8).
2. pressure limiting valve according to claim 1 is characterized in that:
The described third part of described movable part is screw thread guide (3), and described screw thread guide is provided with external screw thread, and engages by the inwall of described external screw thread with described inner shell (2).
3. pressure limiting valve according to claim 2 is characterized in that,
The inwall of described inner shell (2) is provided with the hole that holds ball (12), and described ball engages with the described external screw thread of described screw thread guide (3).
4. pressure limiting valve according to claim 2 is characterized in that,
The inwall of described inner shell (2) is provided with the female thread that engages with the described external screw thread of described screw thread guide (3).
5. pressure limiting valve according to claim 2 is characterized in that,
The second portion of described movable part is spool (7), disc is arranged to cover the described air inlet of described valve seat (6) in the bottom of described spool, the top of described spool is guide post, partly is arranged at by back-up ring (11) in the inner chamber of described stroke guide rod (8).
6. pressure limiting valve according to claim 5 is characterized in that,
The described guide post of described spool is provided with one or a plurality of arcual protuberance (71,72) that separates each other, and described protuberance (71,72) matches with the inner chamber of described stroke guide rod (8).
7. pressure limiting valve according to claim 5 is characterized in that,
Described shell (1) is provided with the first slope boss (19), described inner shell (2) is provided with the second slope boss (21) with the corresponding position of the described first slope boss (19), and the position of the described first slope boss (19) is arranged to and can be raise by the described second slope boss (21).
8. pressure limiting valve according to claim 5 is characterized in that,
The outside lower end of described shell (1) is provided with scale, and described pressure limiting valve further comprises:
Scale keeper (4) is fixed on the described inner shell (2), and shape is corresponding with the shape that is provided with graduated part of described shell (1), and described scale keeper (4) is provided with positioning mark point (20).
9. pressure limiting valve according to claim 8 is characterized in that,
Described pressure limiting valve further comprises position indicating mechanism (16,17,18), and described position indicating mechanism comprises:
Pedestal (18) is fixedly set on the described inner shell (2);
Spring (17), an end are fixed in the inner chamber of described pedestal (18);
And
Pin (16) is fixedlyed connected with the other end of the described spring (17) of described position indicating mechanism, and is partly protruded in outside the described pedestal (18),
The inwall of described shell (1) is provided with the corresponding recess of described scale (22) with described pin (16) and described shell (1).
10. pressure limiting valve according to claim 8 is characterized in that:
Described pressure limiting valve further comprises position indicating mechanism (13), described position indicating mechanism (13) is the circular arc shape, along being fixedly set on the described inner shell (2) to the small part outer peripheral edges of described inner shell (2), and described position indicating mechanism (13) is provided with elastic protrusion (131) in edge;
The inwall of described shell (1) is provided with and the described projection (131) of described position indicating mechanism (13) and the corresponding recess of described scale (22) of described shell (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007103023556A CN101219249B (en) | 2006-12-25 | 2007-12-25 | Pressure-limiting valve |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200620166422 | 2006-12-25 | ||
| CN200620166422.7 | 2006-12-25 | ||
| CN2007103023556A CN101219249B (en) | 2006-12-25 | 2007-12-25 | Pressure-limiting valve |
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| Publication Number | Publication Date |
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| CN101219249A CN101219249A (en) | 2008-07-16 |
| CN101219249B true CN101219249B (en) | 2010-06-23 |
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| CN2007103023556A Active CN101219249B (en) | 2006-12-25 | 2007-12-25 | Pressure-limiting valve |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101862497B (en) * | 2009-04-15 | 2013-08-14 | 北京谊安医疗系统股份有限公司 | Pressure control valve |
| US11452838B2 (en) | 2011-04-28 | 2022-09-27 | Michael J. Rusher | Positive expiratory pressure devices with flutter valve |
| CN103007408A (en) * | 2012-11-28 | 2013-04-03 | 宁波圣宇瑞医疗器械有限公司 | Regulating valve for breathing apparatus |
| CN104874084B (en) * | 2014-02-28 | 2019-07-05 | 北京谊安医疗系统股份有限公司 | Outlet valve and ventilator with it |
| CN104398302B (en) * | 2014-10-20 | 2017-04-05 | 周均洪 | A kind of negative pressure adjusting device being connected with ureter sheath |
| WO2021108524A2 (en) * | 2019-11-25 | 2021-06-03 | Rusher Michael J | Positive expiratory pressure devices with flutter valve |
| CN111678042B (en) * | 2020-05-22 | 2021-09-24 | 湖州贝德流体设备有限公司 | Semi-automatic switching system for gas steel cylinders |
| CN112999743B (en) * | 2021-03-22 | 2022-08-23 | 四川省分析测试服务中心 | High-pressure filter valve |
| CN114129815B (en) * | 2021-11-30 | 2024-02-02 | 中国人民解放军西部战区总医院 | Automatic deep vein thrombolysis device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2164571A (en) * | 1984-09-19 | 1986-03-26 | Boc Group Plc | Pressure limiting valve assembly |
| CN2098599U (en) * | 1991-08-06 | 1992-03-11 | 哈尔滨市延兴炉具制造厂 | Pressure valve with pressure-regulating spring |
| US5425358A (en) * | 1992-08-03 | 1995-06-20 | Vital Signs, Inc. | Pressure limiting valve for ventilation gas apparatus |
| US5950623A (en) * | 1997-10-16 | 1999-09-14 | Ohmeda Inc. | Adjustable pressure limiting valve for anesthesia breathing circuit |
-
2007
- 2007-12-25 CN CN2007103023556A patent/CN101219249B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2164571A (en) * | 1984-09-19 | 1986-03-26 | Boc Group Plc | Pressure limiting valve assembly |
| CN2098599U (en) * | 1991-08-06 | 1992-03-11 | 哈尔滨市延兴炉具制造厂 | Pressure valve with pressure-regulating spring |
| US5425358A (en) * | 1992-08-03 | 1995-06-20 | Vital Signs, Inc. | Pressure limiting valve for ventilation gas apparatus |
| US5950623A (en) * | 1997-10-16 | 1999-09-14 | Ohmeda Inc. | Adjustable pressure limiting valve for anesthesia breathing circuit |
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| CN101219249A (en) | 2008-07-16 |
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