CN103182141A - Two-way tee valve - Google Patents
Two-way tee valve Download PDFInfo
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- CN103182141A CN103182141A CN2011104577137A CN201110457713A CN103182141A CN 103182141 A CN103182141 A CN 103182141A CN 2011104577137 A CN2011104577137 A CN 2011104577137A CN 201110457713 A CN201110457713 A CN 201110457713A CN 103182141 A CN103182141 A CN 103182141A
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Abstract
The invention discloses a two-way tee valve. The two-way tee valve comprises a valve body and a valve cap connected with the valve body, wherein the valve body is provided with a first intake passage and a second intake passage; the valve cap is provided with a third intake passage; a valve core assembly is arranged in a space formed by the third intake passage and the second intake passage, and comprises a gland bush, an upper spring, an upper valve rod, a sealing gasket, a lower valve rod and a lower spring, which are arranged sequentially from top to bottom; a framework assembly is arranged at the junction of the first intake passage and the second and third intake passages, and comprises an upper valve gasket, a framework and a lower valve gasket, which are arranged sequentially from top to bottom; the sealing gasket is positioned in the framework; the up and down movement of the sealing gasket can be realized according to the elastic force of the upper spring and the lower spring; the sealing gasket is in contact with the upper valve gasket; the first intake passage is communicated with the second intake passage; the sealing gasket is in contact with the lower valve gasket; and the first intake passage is communicated with the third intake passage. The two-way tee valve has the advantages of simple structure, good leak tightness, small air lock and long gland bush travelling.
Description
Technical field
The present invention relates to a kind of two position three-way valve, relate in particular to a kind of anesthesia respirator two position three-way valve.
Background technology
Anesthesia respirator is hospital when undergoing surgery, and to the important medical apparatus and instruments that patient anaesthetizes sb. generally, its major function is to suck anesthetis, oxygen supply and provide auxiliary or control is breathed for patient.
Anesthesia evaporator is the important composition parts on the anesthetic machine, and it provides stable, concentration to anaesthetize mist accurately by anesthetic machine to patient.
Anesthesia respirator links to each other by two position three-way valve with anesthesia evaporator.When the access failure anesthesia evaporator, anesthesia respirator is carried gas by two position three-way valve to patient, and this moment, two position three-way valve should guarantee outwards leakage of gas, and the gas of the two position three-way valve of flowing through does not have vapour lock or vapour lock is very little; After connecting anesthesia evaporator, self closes two position three-way valve, all gas anesthesia evaporator of flowing through, and this moment, two position three-way valve should guarantee that anesthetis do not reveal.There is following defective in traditional two position three-way valve: complex structure, sealing is poor, vapour lock is big, the gland stroke is short.
Summary of the invention
The objective of the invention is to solve the problem of defectives such as there is complex structure in traditional two position three-way valve, sealing is poor, vapour lock is big and the gland stroke is short, provide a kind of two position three-way valve, the advantage that it has simple in structure, good airproof performance, vapour lock is little and the gland stroke is long.
The objective of the invention is to be achieved through the following technical solutions:
A kind of two position three-way valve, comprise valve body and the valve gap that joins with it, described valve body has first inlet channel and second inlet channel, described valve gap has the 3rd inlet channel, inside at second inlet channel and the 3rd inlet channel is equipped with core assembly jointly, intersection at first inlet channel and second inlet channel, the 3rd inlet channel is equipped with skeleton component, by cooperating of core assembly and skeleton component, so that first inlet channel is connected with second inlet channel, the equal selectivity of the 3rd inlet channel.
Preferably, described valve body upper end offers first cannelure, second cannelure, second inlet channel downwards successively, and has the first step face bottom described first cannelure, and described second cannelure bottom has the second step face;
Offer the 3rd cannelure, first inlet channel successively in described valve body one side direction, and first inlet channel intersects with second cannelure and is communicated with, described the 3rd cannelure air inlet pipe joint that outwards has been threaded.
Preferably, described skeleton component comprises by the last valve pad that sets gradually under last, skeleton, following valve pad, described upward valve pad is installed on the valve gap bottom and is positioned on the first step face, described skeleton, following valve pad are installed in second cannelure successively, and making skeleton upwards contact upward valve pad, following valve pad is positioned at downwards on the second step face.
Preferably, described core assembly comprises gland, upper spring, upper valve rod, sealing gasket, lower valve rod, lower spring, and by being installed on successively under last by the 3rd inlet channel, second cannelure, in the installing space that second inlet channel is formed, and make described sealing gasket be positioned at skeleton, described upper spring is set in the upper valve rod periphery, and upper spring one end in contact gland bottom, other end contact sealing gasket upper surface, sealing gasket activity cross-under is on upper valve rod, lower valve rod inside is stretched in the upper valve rod bottom, lower spring is set in the lower valve rod periphery, and lower spring one end in contact valve body, other end contact sealing gasket lower surface.
Preferably, the first cannelure inboard, upper end of described valve body has female thread, and described valve gap lower end coupling arranges external screw thread, so that valve body is threaded with valve gap, in described valve gap periphery and to be positioned at described external screw thread root ring cutting fluted, the O RunddichtringO is installed in described groove.
Preferably, the whole cirque structure that adopts of described skeleton, its upper and lower end face is the plane, between the upper and lower end face and its excircle be provided with groove, on described groove, evenly have some air-vents; Described upper and lower valve pad all has centre bore, and has a boss in the position of centre bore correspondence, and described boss all is positioned at the side near described skeleton.
Preferably, described gland integral body is cylindrical, at its peripheral evenly rip cutting four straight flanges, and leave the circular arc guide part in the center of straight flange, gland upper end ring cutting has the 3rd step surface, the lower end has the 4th cannelure, and described upper spring one end is installed in the 4th cannelure, and the other end is set in described upper valve rod periphery and contacts described sealing gasket upper surface; Described valve gap adopts hollow structure, make its inside have the 3rd inlet channel, inwardly there is projection described valve gap upper end, described gland is installed in the valve gap by the compression upper spring, guide part contact valve gap inwall so that gland moves under the elastic force effect of upper spring steadily, and makes the 3rd step surface hold out against on described projection, and described sealing gasket contacts with last valve pad under normal conditions, and first inlet channel is communicated with second inlet channel.
Preferably, described sealing gasket external diameter is greater than the centre bore aperture of upper and lower valve pad, and sealing gasket upwards contacts with last valve pad, and first inlet channel is communicated with second inlet channel, and sealing gasket contacts with following valve pad downwards, and first inlet channel is communicated with the 3rd inlet channel.
Preferably, described sealing gasket is polytetrafluoroethylene sealing gasket.
Preferably, described valve gap internal diameter is greater than described gland external diameter.
Beneficial effect of the present invention is: by in second inlet channel and the 3rd inlet channel core assembly being installed jointly, and in the intersection of first inlet channel and second inlet channel, the 3rd inlet channel skeleton component is installed, by cooperating of core assembly and skeleton component, realize that selectivity is communicated with between first inlet channel and second inlet channel, the 3rd inlet channel; Specifically, under normal conditions, sealing gasket is valve pad in contact under the elastic force effect of lower spring, because the centre bore aperture of last valve pad is less than the external diameter of sealing gasket, made the sealing gasket shutoff to the air inlet of the 3rd inlet channel, so anesthetic gases enters second inlet channel from the air-vent of first inlet channel on skeleton, enter the anesthetic machine downstream by two-position three way valve pipeline and joint again; When gland is stressed when pressing down, sealing gasket is valve pad under contact under the elastic force effect of upper spring, because the centre bore aperture of following valve pad is less than the external diameter of sealing gasket, made the sealing gasket shutoff to the air inlet of second inlet channel, so anesthetic gases enters the 3rd inlet channel from first inlet channel air-vent on skeleton, because the internal diameter of valve gap greater than the external diameter of gland, makes and forms certain clearance each other that this moment, anesthetic gases flowed to the outside of valve gap from this gap; Faying face at valve gap and valve body arranges the O RunddichtringO simultaneously, feasible whole better tightness.The contrast prior art, that this two position three-way valve has is simple in structure, good airproof performance, vapour lock is little and the gland stroke is long advantage.
Description of drawings
The present invention is described in further detail with embodiment with reference to the accompanying drawings below.
Fig. 1 is the cross-sectional schematic of two position three-way valve of the present invention;
Fig. 2 is the cross-sectional schematic of the valve body shown in Fig. 1;
Fig. 3 is the cross-sectional schematic of the valve gap shown in Fig. 1;
Fig. 4 is the schematic perspective view of the skeleton shown in Fig. 1;
Fig. 5 is the generalized section of Fig. 4;
Fig. 6 is the cross-sectional schematic of the upper and lower valve pad shown in Fig. 1;
Fig. 7 is the schematic perspective view of the gland shown in Fig. 1;
Fig. 8 is the generalized section of Fig. 7.
Among the figure:
1, valve gap; 2, gland; 3, upper spring; 4, O RunddichtringO; 5, valve body; 6, go up valve pad; 7, skeleton; 8, sealing gasket; 9, upper valve rod; 10, following valve pad; 11, lower valve rod; 12, lower spring; 13, pipe joint; 14, first inlet channel; 15, second inlet channel; 16, the 3rd inlet channel; 17, first cannelure; 18, second cannelure; 19, first step face; 20, second step face; 21, the 3rd cannelure; 22, female thread; 23, external screw thread; 24, groove; 25, upper surface; 26, lower surface; 27, air-vent; 28, centre bore; 29, boss; 30, the 3rd step surface; 31, the 4th cannelure; 32, projection; 33, guide part.
The specific embodiment
As shown in Figure 1, in present embodiment, two position three-way valve of the present invention, the valve gap 1 that comprises valve body 5 and join with it, valve body 5 has first inlet channel 14 and second inlet channel 15, valve gap 1 has the 3rd inlet channel 16, inside at second inlet channel 15 and the 3rd inlet channel 16 is equipped with core assembly jointly, at first inlet channel 14 and second inlet channel 15, the intersection of the 3rd inlet channel 16 is equipped with skeleton component, by cooperating of core assembly and skeleton component, so that first inlet channel 14 and second inlet channel 15, the 3rd inlet channel 16 equal selectivitys are connected.
Wherein, core assembly comprises gland 2, upper spring 3, upper valve rod 9, sealing gasket 8, lower valve rod 11, lower spring 12, upper spring 3 is set in upper valve rod 9 peripheries, and upper spring 3 one end in contact glands 2 bottoms, other end contact sealing gasket 8 upper surfaces, sealing gasket 8 activity cross-under are on upper valve rod 9, lower valve rod 11 inside are stretched in upper valve rod 9 bottoms, lower spring 12 is set in lower valve rod 11 peripheries, and lower spring 12 1 end in contact valve bodies 5, other end contact sealing gasket 8 lower surfaces.
Skeleton component comprises by the last valve pad 6 that sets gradually under last, skeleton 7, following valve pad 10.
Referring to Fig. 2, show the concrete structure of valve body, valve body 5 upper ends offer first cannelure 17, second cannelure 18, second inlet channel 15 downwards successively;
First cannelure, 17 bottoms have first step face 19, and the inboard has female thread 22, and first step face 19 is used for the fixing valve pad 6 of going up, and female thread 22 is used for being threaded valve gap 1;
Second cannelure, 18 bottoms have second step face 20, the second cannelures 18 and are used for installing skeleton 7 and following valve pad 10, and second step face 20 is used for fixing valve pad 10 down;
Offer the 3rd cannelure 21, first inlet channel 14 in valve body 5 one side direction successively, and first inlet channel 14 intersects with second cannelure 18 and is communicated with;
The 3rd cannelure 21 outwards has been threaded air inlet with pipe joint 13.
Referring to Fig. 3, show the concrete structure of valve gap, valve gap 1 adopts hollow structure, make its inside have the 3rd inlet channel 16, inwardly there is projection 32 valve gap 1 upper end, this projection is used for the position of restriction gland, make gland 2 be positioned at valve gap 1 inside all the time, valve gap 1 lower end arranges the external screw thread 23 that is complementary with female thread 22, so that valve body 5 is threaded with valve gap 1, in valve gap 1 periphery and to be positioned at external screw thread 23 root ring cuttings fluted 24, this groove is used for O RunddichtringO 4 is installed, and has strengthened the sealing of valve integral body.
Referring to Fig. 4～5, show the concrete structure of skeleton, the skeleton 7 whole cirque structures that adopt, its upper and lower end face 25,26 is the plane, between the upper and lower end face 25,26 and its excircle be provided with groove, evenly have eight air-vents 27 on groove, air-vent 27 plays the effect of a center-aisle, is responsible for being delivered to second inlet channel 15 or the 3rd inlet channel 16 by the anesthetic gases that first inlet channel 14 enters.
Referring to Fig. 6, show the concrete structure of upper and lower valve pad, upper and lower valve pad 6,10 all has centre bore 28, and has a boss 29 in the position of centre bore 28 correspondences, boss 29 all is positioned near described skeleton 7 one sides, and centre bore 28 is actual to be air inlet to second inlet channel 15 or the 3rd inlet channel 16.
Referring to Fig. 7～8, show the concrete structure of gland, gland 2 is whole cylindrical, at its peripheral evenly rip cutting four straight flanges, and leave circular arc guide part 33 in the center of straight flange, gland 2 upper end ring cuttings have the 3rd step surface 30, and the lower end has the 4th cannelure 31; Guide part 33 can make that gland 2 motion in its pressure journey is stable more, reliable; The 3rd step surface 30 matches with the projection 32 of valve gap inboard, has formed the position-limit mechanism of gland, guarantees that gland 2 does not break away from valve gap 1 in its stroke; The 4th cannelure 31 is used for installing spring 3.
Preferably, but sealing gasket 8 and upper and lower valve pad 6,10 both sides end face encapsulates.
Preferably, sealing gasket 8 and upper and lower valve pad 6,10 both sides end faces are encapsulate not, can adopt rubber, politef, macromolecular material to make.
During assembling, (1) at first will be descended valve pad 10 to be installed in second cannelure 18 and place on the second step face 20, and the boss 29 on it extends upward;
(2) lower spring 12 is enclosed within lower valve rod 11 peripheries, and passes down the centre bore 28 of valve pad, place second inlet channel 15 downwards, and make the lower end of lower spring 12 contact with valve body 5;
(3) then skeleton 7 is installed in down valve pad 10 tops;
(4) in advance upper spring 3 one ends are installed in the 4th cannelure 31 of gland 2 bottoms, the other end is enclosed within upper valve rod 9 peripheries, and contacts with sealing gasket 8 upper surfaces that are socketed in upper valve rod 9 middle parts;
(5) lower valve rod 11 inside are inserted in upper valve rod 9 bottoms, make sealing gasket 8 be positioned at skeleton 7, install valve pad 6 on skeleton 7 tops this moment, and the boss on it 29 extends downwards, and upper and lower two boss 29 are controlled sealing gasket 8 in the zone that skeleton 7, two boss 29 surround;
(6) in valve gap 1 peripheral grooves 24, snap in O RunddichtringO 4, and with gland 2 alignment and valve gap inside, screw in valve gap downwards, make valve gap 1 bottom will go up valve pad 6 and withstand on the first step face 19, go into pipe joint 13 at valve body 5 one sidespins at last, can finish installation.
When gland 2 is in the normal state, sealing gasket 8 is valve pad boss 29 in contact under the elastic force effect of lower spring 12, because centre bore 28 apertures of last valve pad are less than sealing gasket 8 external diameters, sealing gasket 8 shutoff have been made to the air inlet of the 3rd inlet channel 16, so anesthetic gases enters second inlet channel 15 from the air-vent 27 of first inlet channel 14 on skeleton, enter the anesthetic machine downstream by two-position three way valve pipeline and joint (accompanying drawing is not shown) again.
When gland 2 stressed pressing down, sealing gasket 8 is valve pad boss 29 under contact under the elastic force effect of upper spring 3, because centre bore 28 apertures of following valve pad are less than sealing gasket 8 external diameters, sealing gasket 8 shutoff have been made to the air inlet of second inlet channel 15, so anesthetic gases enters the 3rd inlet channel 16 from first inlet channel 14 air-vent 27 on skeleton, because valve gap 1 internal diameter is greater than gland 2 external diameters, and at peripheral evenly rip cutting four straight flanges of gland, make to form certain clearance each other that this moment, anesthetic gases flowed to the outside of valve gap from this gap.
Claims (10)
1. two position three-way valve, the valve gap (1) that comprises valve body (5) and join with it, it is characterized in that: described valve body (5) has first inlet channel (14) and second inlet channel (15), described valve gap (1) has the 3rd inlet channel (16), inside at second inlet channel (15) and the 3rd inlet channel (16) is equipped with core assembly jointly, at first inlet channel (14) and second inlet channel (15), the intersection of the 3rd inlet channel (16) is equipped with skeleton component, by cooperating of core assembly and skeleton component, so that first inlet channel (14) and second inlet channel (15), the 3rd inlet channel (16) all selectivity is connected.
2. two position three-way valve according to claim 1, it is characterized in that: described valve body (5) upper end offers first cannelure (17), second cannelure (18), second inlet channel (15) downwards successively, and described first cannelure (17) bottom has first step face (19), and described second cannelure (18) bottom has second step face (20);
Offer the 3rd cannelure (21), first inlet channel (14) successively in described valve body (5) one side direction, and first inlet channel (14) intersects with second cannelure (18) and is communicated with, described the 3rd cannelure (21) the air inlet pipe joint (13) that outwards has been threaded.
3. two position three-way valve according to claim 1, it is characterized in that: described skeleton component comprises by the last valve pad (6) that sets gradually under last, skeleton (7), following valve pad (10), described upward valve pad (6) is installed on valve gap (1) bottom and is positioned on the first step face (19), described skeleton (7), following valve pad (10) are installed in second cannelure (18) successively, and making skeleton (7) upwards contact upward valve pad (6), following valve pad (10) is positioned at downwards on the second step face (20).
4. two position three-way valve according to claim 1, it is characterized in that: described core assembly comprises gland (2), upper spring (3), upper valve rod (9), sealing gasket (8), lower valve rod (11), lower spring (12), and by being installed on successively under last by the 3rd inlet channel (16), second cannelure (18), in the installing space that second inlet channel (15) is formed, and make described sealing gasket (8) be positioned at skeleton (7), described upper spring (3) is set in upper valve rod (9) periphery, and upper spring (3) one end in contact glands (2) bottom, other end contact sealing gasket (8) upper surface, sealing gasket (8) activity cross-under is on upper valve rod (9), lower valve rod (11) inside is stretched in upper valve rod (9) bottom, lower spring (12) is set in lower valve rod (11) periphery, and lower spring (12) one end in contact valve bodies (5), other end contact sealing gasket (8) lower surface.
5. two position three-way valve according to claim 1, it is characterized in that: upper end first cannelure (17) inboard of described valve body (5) has female thread (22), described valve gap (1) lower end coupling arranges external screw thread (23), so that valve body (5) is threaded with valve gap (1), peripheral and be positioned at described external screw thread (23) root ring cutting fluted (24) at described valve gap (1), O RunddichtringO (4) is installed in described groove (24).
6. two position three-way valve according to claim 3, it is characterized in that: the whole cirque structure that adopts of described skeleton (7), its upper and lower end face (25,26) is the plane, be positioned between the upper and lower end face (25,26) and its excircle is provided with groove, on described groove, evenly have some air-vents (27); Described upper and lower valve pad (6,10) all has centre bore (28), and has a boss (29) in the corresponding position of centre bore (28), and described boss (29) all is positioned at the side near described skeleton (7).
7. two position three-way valve according to claim 4, it is characterized in that: described gland (2) is whole cylindrical, at its peripheral evenly rip cutting four straight flanges, and leave circular arc guide part (33) in the center of straight flange, gland (2) upper end ring cutting has the 3rd step surface (30), the lower end has the 4th cannelure (31), and described upper spring (3) one ends are installed in the 4th cannelure (31), and the other end is set in described upper valve rod (9) periphery and contacts described sealing gasket (8) upper surface; Described valve gap (1) adopts hollow structure, make its inside have the 3rd inlet channel (16), inwardly there is projection (32) described valve gap (1) upper end, described gland (2) is installed in the valve gap (1) by compression upper spring (3), guide part (33) contact valve gap (1) inwall, so that gland (2) moves under the elastic force effect of upper spring (3) steadily, and make the 3rd step surface (30) hold out against on described projection (32), and described sealing gasket (8) contacts with last valve pad (6) under normal conditions, and first inlet channel (14) is communicated with second inlet channel (15).
8. according to claim 4 or 7 arbitrary described two position three-way valves, it is characterized in that: described sealing gasket (8) external diameter is greater than centre bore (28) aperture of upper and lower valve pad (6,10), sealing gasket (8) upwards contacts with last valve pad (6), first inlet channel (14) is communicated with second inlet channel (15), sealing gasket (8) contacts with following valve pad (10) downwards, and first inlet channel (14) is communicated with the 3rd inlet channel (16).
9. according to claim 4 or 7 arbitrary described two position three-way valves, it is characterized in that: described sealing gasket (8) is polytetrafluoroethylene sealing gasket.
10. according to claim 3 or 5 or 7 arbitrary described two position three-way valves, it is characterized in that: described valve gap (1) internal diameter is greater than described gland (2) external diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110457713.7A CN103182141B (en) | 2011-12-30 | 2011-12-30 | Two position three-way valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110457713.7A CN103182141B (en) | 2011-12-30 | 2011-12-30 | Two position three-way valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103182141A true CN103182141A (en) | 2013-07-03 |
| CN103182141B CN103182141B (en) | 2016-03-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110457713.7A Active CN103182141B (en) | 2011-12-30 | 2011-12-30 | Two position three-way valve |
Country Status (1)
| Country | Link |
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| CN (1) | CN103182141B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103407440A (en) * | 2013-08-22 | 2013-11-27 | 瑞立集团瑞安汽车零部件有限公司 | Lever valve |
| CN104880281A (en) * | 2014-02-28 | 2015-09-02 | 北京谊安医疗系统股份有限公司 | Outer airtight testing device |
| CN104880284A (en) * | 2014-02-28 | 2015-09-02 | 北京谊安医疗系统股份有限公司 | Inner airtight testing device |
| CN109157300A (en) * | 2018-07-23 | 2019-01-08 | 深圳市瑞沃德生命科技有限公司 | Pet Anesthesia machine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4331140A (en) * | 1979-07-30 | 1982-05-25 | Brian Hallsey | Shuttle valve |
| DE19816398A1 (en) * | 1998-04-11 | 1999-10-14 | Jan Willem Marinus Myers | Two-way valve, for use in e.g., medicine |
| CN101766864A (en) * | 2008-12-29 | 2010-07-07 | 北京谊安医疗系统股份有限公司 | two-position three-way valve |
| CN102793960A (en) * | 2012-08-14 | 2012-11-28 | 苏州品诺维新医疗科技有限公司 | Air path device for pneumatic control passage switching and control method |
-
2011
- 2011-12-30 CN CN201110457713.7A patent/CN103182141B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4331140A (en) * | 1979-07-30 | 1982-05-25 | Brian Hallsey | Shuttle valve |
| DE19816398A1 (en) * | 1998-04-11 | 1999-10-14 | Jan Willem Marinus Myers | Two-way valve, for use in e.g., medicine |
| CN101766864A (en) * | 2008-12-29 | 2010-07-07 | 北京谊安医疗系统股份有限公司 | two-position three-way valve |
| CN102793960A (en) * | 2012-08-14 | 2012-11-28 | 苏州品诺维新医疗科技有限公司 | Air path device for pneumatic control passage switching and control method |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103407440A (en) * | 2013-08-22 | 2013-11-27 | 瑞立集团瑞安汽车零部件有限公司 | Lever valve |
| CN104880281A (en) * | 2014-02-28 | 2015-09-02 | 北京谊安医疗系统股份有限公司 | Outer airtight testing device |
| CN104880284A (en) * | 2014-02-28 | 2015-09-02 | 北京谊安医疗系统股份有限公司 | Inner airtight testing device |
| CN104880281B (en) * | 2014-02-28 | 2019-10-29 | 北京谊安医疗系统股份有限公司 | Outer airtight test device |
| CN104880284B (en) * | 2014-02-28 | 2019-10-29 | 北京谊安医疗系统股份有限公司 | Interior airtight test device |
| CN109157300A (en) * | 2018-07-23 | 2019-01-08 | 深圳市瑞沃德生命科技有限公司 | Pet Anesthesia machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103182141B (en) | 2016-03-02 |
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