CN202397936U - Laughing gas inlet valve - Google Patents
Laughing gas inlet valve Download PDFInfo
- Publication number
- CN202397936U CN202397936U CN 201120570451 CN201120570451U CN202397936U CN 202397936 U CN202397936 U CN 202397936U CN 201120570451 CN201120570451 CN 201120570451 CN 201120570451 U CN201120570451 U CN 201120570451U CN 202397936 U CN202397936 U CN 202397936U
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- CN
- China
- Prior art keywords
- valve
- spool
- laughing gas
- sealing ring
- gas intake
- 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.)
- Withdrawn - After Issue
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Abstract
The utility model discloses a laughing gas inlet valve which comprises a valve body and a valve core, wherein the valve body is arranged inside the valve body; the valve core comprises a valve head and a valve rod; a plurality of semicircular vents are uniformly distributed on the outer ring of the valve head; the valve head is provided with a groove for mounting a spring; the end surface of the top of the groove is the upper end surface of the valve core, and is provided with an inner side line with an arc chamfer and an outer side line with an arc chamfer; and an arc sealing ring boss is arranged at the connection part of the valve head and the valve head. The cross section of the valve core is changed into a semicircular structure, so that the ventilation can be achieved, the machining is facilitated, and the axial positioning effect is good; through filleting the inner side line of the upper end surface of the valve core, the collision between the upper end surface of the valve core and the spring is avoided; through filleting the outer side line of the upper end surface of the valve core, the friction force at the contact part of the outer side line and the inner wall of the valve body can be reduced; and the contact part of the valve core and a sealing ring is designed to be arc-shaped, so that the phenomenon of too great deformation of the sealing ring due to long-time use can be avoided.
Description
Technical field
This utility model relates to medical instruments field, relates in particular to a kind of laughing gas intake valve.
Background technology
When using anesthetic machine, need flow to patient then with oxygen and laughing gas according to the mixed of being scheduled to.In the anesthetic machine use, very strict to the requirement of this ratio, no matter be that concentration of oxygen is too high; Or the excessive concentration of laughing gas; All might influence patient's health, even threat to life, the degree accurate in scale of laughing gas and oxygen is the successful key of operation; Even so after anesthetic machine is by life-time service, also all require the gas control valve of anesthetic machine can accurately control this ratio.
But the control valve of existing anesthetic machine does not also reach above-mentioned requirements, and this is that the ratio that causes oxygen and laughing gas is not in the scope that requires because the laughing gas intake valve in the control valve behind life-time service, reduces owing to a variety of causes causes degree of accuracy.Like Fig. 1, shown in 5～8, there is following problem in present laughing gas intake valve: the first, laughing gas intake valve spool belongs to axial location, and section structure is six sides; But because the spool size is less; It is asymmetric to mill out the hexagonal structure that comes, and the axial location error increases, and causes spool 4 biasings; The second, when laughing gas intake valve spool groove inner edge and spring bump; Spring will no longer receive the power of even variation; Simultaneously valve port also not evenly gradual change open, effusive laughing gas can not be an even variation, spool groove inner edge is set to rectangular edge here; Only can increase the weight of the collision of spring, influence the output of laughing gas; Three, laughing gas intake valve spool groove outer edge rubs with valve interior wall mutually; Frictional force will be destroyed spring and evenly compress; Cause that valve port is inhomogeneous to be opened, the laughing gas flow is affected, and spool groove outer edge also is set to rectangular edge here; Only can increase the frictional force of spool 4 and valve interior wall, make the situation of the inhomogeneous compression of spring more serious; Four, spool 4 is provided with O RunddichtringO 5 with the valve port contact position, and O RunddichtringO 5 excessive deformations are caused in the gap between O RunddichtringO 5 and the spool 4 easily, and long-time use can make 5 deformation failures of O RunddichtringO, and causing just has laughing gas to flow out when also not promoting spool.
The utility model content
The purpose of this utility model be to solve since the spool that causes of process issues can not location, spool with spring collides, spool and valve body internal friction and use sealing ring to be out of shape excessive problem for a long time; A kind of laughing gas intake valve is provided, its have simple in structure, easy to use, sealing ring long-time use do not lose efficacy yet, the laughing gas export ratio at claimed range with advantage interior, that the spool axial location is better and easy to process.
The purpose of this utility model is to realize through following technical scheme:
A kind of laughing gas intake valve comprises valve body and spool, and said spool is arranged on valve inner; Said spool comprises valve head and valve rod two parts; Said valve head outer ring evenly is provided with some semicircle passages, and said valve head is provided for the groove of mounting spring, and said recess top surface is said spool upper surface; It has the inner edge of band circular arc chamfering and the outer edge of band circular arc chamfering, and said valve head and valve rod junction are provided with circular arc sealing ring boss.
Further; Set gradually cavity one, cavity two, gas outlet in the said valve body from top to bottom; On the said valve body air inlet is set, said air inlet is communicated to cavity two, and said cavity one is communicated with through the some semicircle passage that is provided with on the valve head with cavity two; Between cavity two and gas outlet, at said valve inner valve port is set, the valve rod of said spool passes valve port and extends in the gas outlet.
Preferably, in the said sealing ring boss sealing ring is set.
Preferably, some spool positioning boss that said valve head outer ring is evenly arranged, and each spool positioning boss is between adjacent passage.
Further, said valve inner is provided with screw plug, and said screw plug is positioned at the spool top, and links to each other with spool through spring.
Preferably, the internal diameter of said valve port is greater than the external diameter of valve rod.
Preferably, the external diameter of said valve head is less than the internal diameter of said cavity one.
Preferably, said screw plug and valve body be through being threaded, and said screw plug and valve body junction are provided with sealing ring.
Preferably, said screw plug lower end has boss, and it is peripheral that said spring one end is enclosed within said boss, in other end installation and the valve head upper grooves.
Preferably, said sealing ring is the O RunddichtringO.
The beneficial effect of this utility model is: the section structure through with spool changes to semicircular structure, not only can realize ventilation, can also make things convenient for machining, and axial location is also better; Through with spool end inner edge and spring contact surface rounding, avoid causing spool end and spring to collide, influence then that valve port is inhomogeneous to be opened; Through with spool end outer edge rounding, can reduce spool end outer edge and valve interior wall touching position friction force; Contact position through spool and the 2nd O RunddichtringO is set to circular arc; Can avoid the 2nd O RunddichtringO to cause distortion excessive because of permanent the use; The contrast prior art, its have simple in structure, convenient and reliable, O RunddichtringO long-time use do not lose efficacy yet, the laughing gas export ratio at claimed range with advantage interior, that the spool axial location is better and easy to process.
Description of drawings
According to accompanying drawing and embodiment this utility model is done further explain below.
Fig. 1 is the cross-sectional schematic of the described laughing gas intake valve of this utility model;
Fig. 2 is the schematic perspective view of the described laughing gas intake valve of this utility model spool;
Fig. 3 is the cross-sectional schematic of the described laughing gas intake valve of this utility model spool;
Fig. 4 is the schematic top plan view of the described laughing gas intake valve of this utility model spool;
Fig. 5 is the schematic perspective view of existing laughing gas intake valve spool;
Fig. 6 is the cross-sectional schematic of existing laughing gas intake valve spool;
Fig. 7 is the assembling sketch map of existing laughing gas intake valve spool and sealing ring thereof;
Fig. 8 is the deformation pattern of existing laughing gas intake valve sealing ring.
Among the figure:
1, screw plug; 11, boss;
2, sealing ring;
3, spring;
4, spool;
41, valve head; 411, inner edge; 412, outer edge; 413, spool positioning boss; 414, passage;
42, valve rod; 43, sealing ring boss; 44, spool lower surface;
5, O RunddichtringO;
6, valve body; 61, valve interior wall; 62, cavity one; 63, cavity two; 64, air inlet; 65, valve port; 66, gas outlet.
The specific embodiment
Shown in Fig. 1～4, in present embodiment, the described laughing gas intake valve of this utility model; Comprise valve body 6 and spool 4, spool 4 is arranged on valve body 6 inside, and spool 4 comprises valve head 41 and valve rod 42 two parts; Valve head 41 outer rings evenly are provided with some semicircle passages 414; Be provided for the groove of mounting spring 3 on the valve head 41, recess top surface is the spool upper surface, and it has the inner edge 411 of band circular arc chamfering; With band circular arc chamfering outer edge 412, valve head 41 is provided with circular arc sealing ring boss 43 with valve rod 42 junctions.
Wherein, Set gradually cavity 1, cavity 2 63, gas outlet 66 in the valve body 6 from top to bottom; Air inlet 64 is set on the valve body 6, and air inlet 64 is communicated to cavity 2 63, and cavity 1 is communicated with through the some semicircle passage 414 that is provided with on the valve head 41 with cavity 2 63; At valve body 6 set inside valve ports 65, the valve rod 42 of spool 4 passes valve port 65 and extends in the gas outlet 66 between cavity 2 63 and gas outlet 66.
Be provided with sealing ring 2 in the sealing ring boss 43, strengthen the air-tightness of gas outlet, can 66 gas leakage when guaranteeing work from the gas outlet.
Some spool positioning boss 413 are evenly arranged in valve head 41 outer rings, and each spool positioning boss 413 is between adjacent passage 414.
Valve body 6 set inside screw plugs 1; Screw plug 1 is positioned at spool 4 tops, and links to each other with spool 4 through spring 3, and screw plug 1 and valve body 6 are through being threaded; And screw plug 1 is provided with sealing ring 2 with valve body 6 junctions; Screw plug 1 lower end has boss 11, and spring 3 one ends are enclosed within boss 11 peripheries, in other end installation and valve head 41 upper grooves.
The internal diameter of valve port 65 is slightly larger than the external diameter of valve rod 42, so that valve rod 42 can pass valve port 65.
The external diameter of valve head 41 is slightly less than the internal diameter of cavity 1, so that form the slit between valve head 41 and the valve body 6.
The preferred sealing ring 2 of this utility model is the O RunddichtringO.
Shown in Fig. 1～4, the laughing gas intake valve is arranged on anesthetic machine with (anesthetic machine is with not shown on the Pneumatic valve figure) on the Pneumatic valve, and laughing gas flows to air inlet 64 from source of the gas; Then get into cavity 2 63, because this moment, the spring 3 in the cavity 1 was in compressive state, so spool 4 is exerted pressure by spring 3; The pressure of spring 3 passes on the sealing ring 2 through spool 4 simultaneously; Make sealing ring 2 be in the compression stage, 2 pairs of valve ports 65 of sealing ring seal simultaneously, make laughing gas can not pass through valve port 65 entering gas outlets 66; This moment, laughing gas can only get into cavitys 1 through the passage on cavity 2 63 and the spool 4 414; Laughing gas pressure effect screw plug 1, cavity 2 63 is identical with cavity 1 pressure at this moment, so spring 3 does not receive the influence of this gas pressure.
When applying the power of an even variation on the spool lower surface 44 at spool 4; Spool 4 at the uniform velocity moves upward, because the 413 pairs of spools 4 of spool positioning boss on the spool 4 play positioning action, so spool 4 can not tilt; In valve body, move on steadily; After spring 3 equal proportions were compressed, valve port 65 equal proportions were opened, and flowed out the equal proportion laughing gas.
As shown in Figure 1, on valve interior wall 61 tops of valve body 6 female thread is set, the coupling female thread is provided with external screw thread on screw plug 1; Can make screw plug 1 be tightened on the inside of valve body 6; And in order to guarantee the sealing of screw plug 1, a sealing ring is installed on the contact surface of screw plug 1 and valve body 6, is guaranteed its air-tightness; One spring 3 is installed in the cavity 1 of valve body 6 simultaneously; These spring 3 one ends are fixed on the boss 11 of screw plug 1, and the other end is fixed in valve head 41 grooves of spool 4, and spool 4 is opened through the elastic force of spring 3.
Shown in Fig. 2～4, spool 4 is made up of valve head 41 and valve rod 42, and the outer ring of valve head 41 evenly is provided with eight semicircle passages 414; And between per two semicircle passages 414 a spool positioning boss 413 is set; So not only can utilize semicircle passage 414 to ventilate, can also utilize spool positioning boss 413 to carry out axial location, and spool 4 design structure for this reason; Can also conveniently process, make machining accuracy reach requirement.
Valve head 41 is provided with sealing ring boss 43 with valve rod 42 junctions, and sealing ring boss 43 is processed into circular arc, and sealing ring 2 distortion that can avoid being installed in the sealing ring boss 43 are excessive, the long-time problem that lost efficacy of using.
Go up fillet with on the valve head 41 intermediary grooves spool end inner edge 411 being set; The spring 3 that can avoid installing in the groove collides with spool end inner edge 411; Be the power that spring 3 continues to receive even variation, while valve port 65 is opening of even gradual change also, makes and flow out the laughing gas even variation.
Spool end outer edge 412 on the valve head 41 is gone up chamfering, can reduce laughing gas intake valve spool end outer edge 412 and rub mutually, reduce frictional force, valve port 65 is evenly opened, the laughing gas flow unchangedization the evenly influence of compression of spring 3 with valve interior wall 61.
Claims (10)
1. laughing gas intake valve; Comprise valve body (6) and spool (4), said spool (4) is arranged on valve body (6) inside, it is characterized in that; Said spool (4) comprises valve head (41) and valve rod (42) two parts; Said valve head (41) outer ring evenly is provided with some semicircle passages (414), and said valve head (41) is provided for the groove of mounting spring (3), and said recess top surface is said spool upper surface; It has the inner edge (411) of band circular arc chamfering and the outer edge (412) of band circular arc chamfering, and said valve head (41) is provided with circular arc sealing ring boss (43) with valve rod (42) junction.
2. laughing gas intake valve according to claim 1; It is characterized in that; Set gradually cavity one (62), cavity two (63), gas outlet (66) in the said valve body (6) from top to bottom; Air inlet (64) is set on the said valve body (6), and said air inlet (64) is communicated to cavity two (63), and said cavity one (62) and cavity two (63) are gone up the some semicircle passage (414) that is provided with through valve head (41) and be communicated with; Be positioned between cavity two (63) and gas outlet (66) at said valve body (6) set inside valve port (65), the valve rod (42) of said spool (4) passes valve port (65) and extends in the gas outlet (66).
3. laughing gas intake valve according to claim 1 is characterized in that, sealing ring (2) is set in the said sealing ring boss (43).
4. laughing gas intake valve according to claim 1 is characterized in that, some spool positioning boss (413) that said valve head (41) outer ring is evenly arranged, and each spool positioning boss (413) is positioned between the adjacent passage (414).
5. laughing gas intake valve according to claim 2 is characterized in that, said valve body (6) set inside screw plug (1), said screw plug (1) are positioned at spool (4) top, and links to each other with spool (4) through spring (3).
6. laughing gas intake valve according to claim 2 is characterized in that, the internal diameter of said valve port (65) is greater than the external diameter of valve rod (42).
7. laughing gas intake valve according to claim 2 is characterized in that, the external diameter of said valve head (41) is less than the internal diameter of said cavity one (62).
8. laughing gas intake valve according to claim 5 is characterized in that, said screw plug (1) and valve body (6) are through being threaded, and said screw plug (1) is provided with sealing ring (2) with valve body (6) junction.
9. laughing gas intake valve according to claim 5 is characterized in that, said screw plug (1) lower end has boss (11), and said spring (3) one ends are enclosed within said boss (11) periphery, in other end installation and valve head (41) upper grooves.
10. laughing gas intake valve according to claim 8 is characterized in that, said sealing ring (2) is the O RunddichtringO.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120570451 CN202397936U (en) | 2011-12-30 | 2011-12-30 | Laughing gas inlet valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120570451 CN202397936U (en) | 2011-12-30 | 2011-12-30 | Laughing gas inlet valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202397936U true CN202397936U (en) | 2012-08-29 |
Family
ID=46695617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120570451 Withdrawn - After Issue CN202397936U (en) | 2011-12-30 | 2011-12-30 | Laughing gas inlet valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202397936U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103182130A (en) * | 2011-12-30 | 2013-07-03 | 北京谊安医疗系统股份有限公司 | Laughing gas inlet valve |
| CN111973856A (en) * | 2020-08-26 | 2020-11-24 | 四川大学华西医院 | ICU remote monitoring and intelligent oxygen supply system for respiratory infectious disease patients |
-
2011
- 2011-12-30 CN CN 201120570451 patent/CN202397936U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103182130A (en) * | 2011-12-30 | 2013-07-03 | 北京谊安医疗系统股份有限公司 | Laughing gas inlet valve |
| CN103182130B (en) * | 2011-12-30 | 2015-12-02 | 北京谊安医疗系统股份有限公司 | Laughing gas intake valve |
| CN111973856A (en) * | 2020-08-26 | 2020-11-24 | 四川大学华西医院 | ICU remote monitoring and intelligent oxygen supply system for respiratory infectious disease patients |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120829 Effective date of abandoning: 20151202 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |