CN106352152B - Gas pipeline water check valve - Google Patents
Gas pipeline water check valve Download PDFInfo
- Publication number
- CN106352152B CN106352152B CN201610968853.3A CN201610968853A CN106352152B CN 106352152 B CN106352152 B CN 106352152B CN 201610968853 A CN201610968853 A CN 201610968853A CN 106352152 B CN106352152 B CN 106352152B
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- Prior art keywords
- plug
- stomata
- connecting rod
- chamber
- gas pipeline
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/18—Actuating devices; Operating means; Releasing devices actuated by fluid actuated by a float
- F16K31/20—Actuating devices; Operating means; Releasing devices actuated by fluid actuated by a float actuating a lift valve
- F16K31/22—Actuating devices; Operating means; Releasing devices actuated by fluid actuated by a float actuating a lift valve with the float rigidly connected to the valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/44—Details of seats or valve members of double-seat valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/08—Guiding yokes for spindles; Means for closing housings; Dust caps, e.g. for tyre valves
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Check Valves (AREA)
Abstract
A kind of gas pipeline water check valve, the first chamber is connected with second chamber by the second stomata, the second chamber is connected with third chamber by third stomata, also there is float spool, the float spool includes the first plug, second plug, connecting rod and floating body, the floating body is fixed on one end of connecting rod, first plug is fixed on the other end of connecting rod, second plug is fixed in connecting rod and is located at the top of floating body, also there is leading truck in the valve body, one end of the leading truck is fixed on the inner wall of valve body, the other end of leading truck is slidably connected with connecting rod, the connecting rod passes through the second venthole and connects floating body, first plug and the second plug；First plug, the second plug, the first venthole and the second venthole radius meet relational expression r1> r3, r2> r4.The present invention rear gas pipeline water check valve that water flow will not also be flowed into fuel gas pipeline wrong pipeline on fuel gas pipeline causes pipeline water blocking.
Description
Technical field
Present invention relates particularly to a kind of gas pipeline water check valves.
Background technique
When installing water heater, installer is easy wrong pipeline, and the fuel gas conduit that should be connected to fuel gas interface is connected to
On hot water outlet, such water flow can flow into fuel gas pipeline along fuel gas conduit, cause dying for entire building, if the evening of discovery,
Water flow even can flow to gas header pipe along gas riser causes the gas supply of entire cell to interrupt, moreover, because combustion gas is inflammable
It is explosive, if resident is not turned off gas-fired equipment and integrally answers gas and is just extremely easy to produce danger when dying, so subsequent multiple gas work
Need to answer gas, very troublesome, wasting manpower and material resources significantly from door to door.
Summary of the invention
It will not be flowed into water flow when wrong pipeline after the object of the present invention is to provide one kind on fuel gas pipeline
The gas pipeline water check valve of fuel gas pipeline.
Realizing the first technical solution of above-mentioned purpose is: a kind of gas pipeline water check valve, improvement are:
A, there is valve body, there is in the valve body first chamber, second chamber and third chamber, also have the first stomata,
Second stomata, third stomata and the 4th stomata, and the first stomata is gas outlet, the 4th stomata is air inlet, the first chamber
It is connected with second chamber by the second stomata, the second chamber is connected with third chamber by third stomata；
B, also there is float spool, the float spool includes the first plug, the second plug, connecting rod and floating body, described
Floating body is fixed on one end of connecting rod, and the first plug is fixed on the other end of connecting rod, and second plug is fixed on connecting rod
At upper and top positioned at floating body；
C, first plug is located in second chamber, and the position of the first plug is corresponding with third stomata, described floating
Body and the second plug are located in first chamber, and the position of the second plug is corresponding with the second stomata, and the connecting rod passes through the
Two stomatas simultaneously connect floating body, the second plug and the first plug；
D, also there is leading truck, one end of the leading truck is fixed on the inner wall of valve body, leading truck in the valve body
The other end is slidably connected with connecting rod；
E, the least radius of first plug 3 is r1, the least radius of the second plug 4 is r2, the radius of third stomata 1
For r3And second stomata 1 radius be r4, and meet relational expression r1> r3, r2> r4。
In the above-mentioned technical solutions, the other end of the leading truck has pilot sleeve, and the connecting rod passes through guide sleeve
Cylinder is simultaneously slidably connected with pilot sleeve.
In the above-mentioned technical solutions, the other end of the leading truck has guiding lantern ring, and the connecting rod passes through guide sleeve
Ring is simultaneously slidably connected with guiding lantern ring.
In the above-mentioned technical solutions, first plug and the second plug are cylindrical body, and the upper surface of cylindrical body is
Plane.
In the above-mentioned technical solutions, first plug and the second plug are stepped ramp type cylindrical body, first plug
Stepped ramp type cylindrical body upper end have the first center frustum and first annular end face, the stepped ramp type cylindrical body of second plug
Upper end there is the second center frustum and the second annular end face, the upper surface of first center frustum and the second center frustum
Radius is respectively r3-1, r4-1, the exradius of the first annular end face and the second annular end face is respectively r3-2, r4-2, and it is full
Sufficient relational expression r3-2>r3>r3-1, r4-2>r4>r4-1。
Realizing second of technical solution of above-mentioned purpose is: a kind of gas pipeline water check valve, improvement are:
A, there is valve body, have in the valve body first chamber and second chamber also have the first stomata, the second stomata and
Third stomata, and the first stomata is gas outlet, third stomata is air inlet, and the first chamber and second chamber pass through the second gas
Hole is connected；
B, also there is float spool, the float spool includes the first plug, the second plug, connecting rod and floating body, described
Floating body is fixed on one end of connecting rod, and the first plug is fixed on the other end of connecting rod, and second plug is fixed on connecting rod
On at the top of floating body；
C, first plug is located in second chamber, and the position of the first plug is corresponding with third stomata, described floating
Body and the second plug are located in first chamber, and the position of the second plug is corresponding with the second stomata, and the connecting rod passes through the
Two stomatas simultaneously connect floating body, the second plug and the first plug；
D, also there is leading truck, one end of the leading truck is fixed on the inner wall of valve body, leading truck in the valve body
The other end is slidably connected with connecting rod；
E, the least radius of first plug is r1, the least radius of the second plug is r2, the radius of third stomata is
r3And second stomata radius be r4, and meet relational expression r1> r3, r2> r4。
In the above-mentioned technical solutions, the other end of the leading truck has pilot sleeve, and the connecting rod passes through guide sleeve
Cylinder is simultaneously slidably connected with pilot sleeve.
The other end of the leading truck has guiding lantern ring in the above-mentioned technical solutions, and the connecting rod passes through guiding lantern ring
And it is slidably connected with guiding lantern ring.
In the above-mentioned technical solutions, first plug and the second plug are cylindrical body, and the upper surface of cylindrical body is
Plane.
In the above-mentioned technical solutions, first plug and the second plug are stepped ramp type cylindrical body, first plug
Stepped ramp type cylindrical body upper end have the first center frustum and first annular end face, the stepped ramp type cylindrical body of second plug
Upper end there is the second center frustum and the second annular end face, the upper surface of first center frustum and the second center frustum
Radius is respectively r3-1, r4-1, the exradius of the first annular end face and the second annular end face is respectively r3-2, r4-2, and it is full
Sufficient relational expression r3-2>r3>r3-1, r4-2>r4>r4-1。
Benefit of the invention is that: the present invention is mounted on the pipeline after gas meter, flow meter, and normal condition water check valve is in unimpeded shape
State, when wrong pipeline, when hot water mouth is connected with fuel gas conduit, water flow can be flowed into water check valve, and floating body floats under buoyancy,
It drives and it is floated by the first plug and the second plug of connecting rod connection, block the first venthole and the second venthole, reach
To the purpose of closure water check valve, water flow will not further flow into gas pipeline and cause pipeline water blocking.
Detailed description of the invention
Fig. 1 is the main view schematic cross-sectional view that the first embodiment of the invention is in unimpeded state；
Fig. 2 is the main view schematic cross-sectional view that structure shown in Fig. 1 is in closed state；
Fig. 3 is the A-A schematic cross-sectional view of Fig. 1；
Fig. 4 is the B-B schematic cross-sectional view of Fig. 1；
Fig. 5 is the C-C schematic cross-sectional view of Fig. 1；
Fig. 6 is the D-D schematic cross-sectional view of Fig. 1；
Fig. 7 is the E-E schematic cross-sectional view of Fig. 2；
Fig. 8 is the F-F schematic cross-sectional view of Fig. 2；
Fig. 9 is the use state diagram of the invention when pipeline is correctly connected；
Figure 10 is the use state diagram of the invention in pipeline wrong；
Figure 11 is the main view schematic cross-sectional view of second of embodiment of the invention；
Figure 12 is the main view schematic cross-sectional view of leading truck machine guiding lantern ring in the present invention；
Figure 13 is the main view schematic cross-sectional view of the first plug and the second plug another kind embodiment in the present invention；
Figure 14 is the schematic top plan view of Figure 13.
Specific embodiment
Below in conjunction with attached drawing and the embodiment provided, the present invention is further illustrated.
The first embodiment of the invention is:
As shown in Fig. 1 ~ 10, a kind of gas pipeline water check valve has valve body 1, have in the valve body 1 first chamber 1-1,
Second chamber 1-2 and third chamber 1-3 also has the first stomata 1-4, the second stomata 1-5, third stomata 1-6 and the 4th stomata
1-7, and the first stomata 1-4 is gas outlet, the 4th stomata 1-7 is air inlet, and the first chamber 1-1 and second chamber 1-2 are logical
It crosses the second stomata 1-5 to be connected, the second chamber 1-2 is connected with third chamber 1-3 by third stomata 1-6.
As shown in Fig. 1,2,7,8,9,10, also there is float spool 2, the float spool 2 includes the first plug 3, second
Plug 4, connecting rod 5 and floating body 6, the floating body 6 are fixed on one end of connecting rod 5, and the first plug 3 is fixed on the another of connecting rod 5
One end, second plug 4 are fixed in connecting rod 5 and are located at the top of floating body 6.
As shown in Fig. 1,2,9,10, first plug 3 is located in second chamber 1-2, and the position of the first plug 3 and the
Three stomata 1-6 are corresponding, and the floating body 6 and the second plug 4 are located in first chamber 1-1, and the position and second of the second plug 4
Stomata 1-5 is corresponding, and the connecting rod 5 passes through the second stomata 1-5 and connects floating body 6, the second plug 4 and the first plug 3.
As shown in Fig. 1,2,5,6,9,10, also there is leading truck 1-8 in the valve body 1, one end of the leading truck 1-8 is solid
It is scheduled on the inner wall of valve body 1, the other end and the connecting rod 5 of leading truck 1-8 is slidably connected.
As shown in Fig. 4,5,6,7,8, the least radius of first plug 3 is r1, the least radius of the second plug 4 is r2,
The radius of third stomata 1-6 is r3And second stomata 1-5 radius be r4, and meet relational expression r1> r3, r2> r4。
As shown in Fig. 1,2,5,6,9,10,11,12, the other end of the leading truck 1-8 has pilot sleeve 1-8-1, institute
Connecting rod 5 is stated across pilot sleeve 1-8-1 and is slidably connected with pilot sleeve 1-8-1, it is of course also possible to be the leading truck 1-
8 other end passes through guiding lantern ring 1-8-2 and slides with guiding lantern ring 1-8-2 with guiding lantern ring 1-8-2, the connecting rod 5
Connection.
As shown in Fig. 1,2,7,8,9,10,11,13,14, first plug 3 and the second plug 4 are cylindrical body, and circle
The upper surface of cylinder is plane, it is of course also possible to be first plug 3 and the second plug 4 is stepped ramp type cylindrical body, it is described
The upper end of the stepped ramp type cylindrical body of first plug 3 has the first center frustum 3-1 and first annular end face 3-2, and described second is stifled
The upper end of first 4 stepped ramp type cylindrical body has the second center frustum 4-1 and the second annular end face 4-2, first center frustum
The radius of the upper surface of 3-1 and the second center frustum 4-1 is respectively r3-1, r4-1, the first annular end face 3-2 and the second ring
The exradius of shape end face 4-2 is respectively r3-2, r4-2, and meet relational expression r3-2>r3>r3-1, r4-2>r4>r4-1。
Second of embodiment of the invention is:
As shown in figure 11, a kind of gas pipeline water check valve has valve body 1, have in the valve body 1 first chamber 1-1 and
Second chamber 1-2 also has the first stomata 1-4, the second stomata 1-5 and third stomata 1-6, and the first stomata 1-4 is gas outlet,
Third stomata 1-6 is air inlet, and the first chamber 1-1 is connected with second chamber 1-2 by the second stomata 1-5；
Also there is float spool 2, the float spool 2 includes the first plug 3, the second plug 4, connecting rod 5 and floating body 6,
The floating body 6 is fixed on one end of connecting rod 5, and the first plug 3 is fixed on the other end of connecting rod 5, and second plug 4 is fixed
In connecting rod 5 and it is located at the top of floating body 6；
First plug 3 is located in second chamber 1-2, and the position of the first plug 3 is corresponding with third stomata 1-6,
The floating body 6 and the second plug 4 are located in first chamber 1-1, and the position of the second plug 4 is corresponding with the second stomata 1-5, institute
Connecting rod 5 is stated across the second stomata 1-5 and connects floating body 6, the second plug 4 and the first plug 3；
Also there is leading truck 1-8, one end of the leading truck 1-8 is fixed on the inner wall of valve body 1, leads in the valve body 1
It is slidably connected to the other end of frame 1-8 with connecting rod 5.
As shown in Fig. 4,5,6,7,8, the least radius of first plug 3 is r1, the least radius of the second plug 4 is r2,
The radius of third stomata 1-6 is r3And second stomata 1-5 radius be r4, and meet relational expression r1> r3, r2> r4。
As shown in Fig. 1,2,5,6,9,10,11,12, the other end of the leading truck 1-8 has pilot sleeve 1-8-1, institute
Connecting rod 5 is stated across pilot sleeve 1-8-1 and is slidably connected with pilot sleeve 1-8-1, it is of course also possible to be the leading truck 1-
8 other end passes through guiding lantern ring 1-8-2 and slides with guiding lantern ring 1-8-2 with guiding lantern ring 1-8-2, the connecting rod 5
Connection.
As shown in Fig. 1,2,7,8,9,10,11,13,14, first plug 3 and the second plug 4 are cylindrical body, and circle
The upper surface of cylinder is plane, it is of course also possible to be first plug 3 and the second plug 4 is stepped ramp type cylindrical body, it is described
The upper end of the stepped ramp type cylindrical body of first plug 3 has the first center frustum 3-1 and first annular end face 3-2, and described second is stifled
The upper end of first 4 stepped ramp type cylindrical body has the second center frustum 4-1 and the second annular end face 4-2, first center frustum
The radius of the upper surface of 3-1 and the second center frustum 4-1 is respectively r3-1, r4-1, the first annular end face 3-2 and the second ring
The exradius of shape end face 4-2 is respectively r3-2, r4-2, and meet relational expression r3-2>r3>r3-1, r4-2>r4>r4-1。
Claims (10)
1. a kind of gas pipeline water check valve, it is characterised in that:
A, there is valve body (1), there is first chamber (1-1), second chamber (1-2) and third chamber (1- in the valve body (1)
3), also there is the first stomata (1-4), the second stomata (1-5), third stomata (1-6) and the 4th stomata (1-7), and the first stomata
(1-4) is gas outlet, and the 4th stomata (1-7) is air inlet, and the first chamber (1-1) and second chamber (1-2) pass through second
Stomata (1-5) is connected, and the second chamber (1-2) is connected with third chamber (1-3) by third stomata (1-6)；
B, also there are float spool (2), the float spool (2) includes the first plug (3), the second plug (4), connecting rod (5)
With floating body (6), the floating body (6) is fixed on one end of connecting rod (5), and the first plug (3) is fixed on the another of connecting rod (5)
End, second plug (4) are fixed on connecting rod (5) and are located at the top of floating body (6)；
C, first plug (3) is located in second chamber (1-2), and the position of the first plug (3) and third stomata (1-6) phase
Corresponding, the floating body (6) and the second plug (4) are located in first chamber (1-1), and the position of the second plug (4) and the second gas
(1-5) is corresponding in hole, and the connecting rod (5) passes through the second stomata (1-5) and connects floating body (6), the second plug (4) and first blocks up
Head (3)；
D, also there is leading truck (1-8) in the valve body (1), one end of the leading truck (1-8) is fixed on the inner wall of valve body (1)
On, the other end and the connecting rod (5) of leading truck (1-8) are slidably connected；
E, the least radius of first plug (3) is r1, the least radius of the second plug (4) is r2, third stomata (1-6)
Radius is r3And second stomata (1-5) radius be r4, and meet relational expression r1> r3, r2> r4。
2. gas pipeline water check valve according to claim 1, it is characterised in that: the other end of the leading truck (1-8) has
Have pilot sleeve (1-8-1), the connecting rod (5), which passes through pilot sleeve (1-8-1) and slides with pilot sleeve (1-8-1), to be connected
It connects.
3. gas pipeline water check valve according to claim 1, it is characterised in that: the other end of the leading truck (1-8) has
Have guiding lantern ring (1-8-2), the connecting rod (5) passes through guiding lantern ring (1-8-2) and connects with guiding lantern ring (1-8-2) sliding
It connects.
4. gas pipeline water check valve according to claim 1, it is characterised in that: first plug (3) and the second plug
It (4) is cylindrical body, and the upper surface of cylindrical body is plane.
5. gas pipeline water check valve according to claim 1, it is characterised in that: first plug (3) and the second plug
It (4) is stepped ramp type cylindrical body, the upper end of the stepped ramp type cylindrical body of first plug (3) has the first center frustum (3-1)
And first annular end face (3-2), the upper end of the stepped ramp type cylindrical body of second plug (4) have the second center frustum (4-1)
And second annular end face (4-2), the radius point of the upper surface of first center frustum (3-1) and the second center frustum (4-1)
It Wei not r3-1, r4-1, the exradius of the first annular end face (3-2) and the second annular end face (4-2) is respectively r3-2, r4-2,
And meet relational expression r3-2>r3>r3-1, r4-2>r4>r4-1。
6. a kind of gas pipeline water check valve, it is characterised in that:
A, there is valve body (1), also there is the first stomata with first chamber (1-1) and second chamber (1-2) in the valve body (1)
(1-4), the second stomata (1-5) and third stomata (1-6), and the first stomata (1-4) be gas outlet, third stomata (1-6) be into
Port, the first chamber (1-1) are connected with second chamber (1-2) by the second stomata (1-5)；
B, also there are float spool (2), the float spool (2) includes the first plug (3), the second plug (4), connecting rod (5)
With floating body (6), the floating body (6) is fixed on one end of connecting rod (5), and the first plug (3) is fixed on the another of connecting rod (5)
End, second plug (4) be fixed on connecting rod (5) at the top of floating body (6)；
C, first plug (3) is located in second chamber (1-2), and the position of the first plug (3) and third stomata (1-6) phase
Corresponding, the floating body (6) and the second plug (4) are located in first chamber (1-1), and the position of the second plug (4) and the second gas
(1-5) is corresponding in hole, and the connecting rod (5) passes through the second stomata (1-5) and connects floating body (6), the second plug (4) and first blocks up
Head (3)；
D, also there is leading truck (1-8) in the valve body (1), one end of the leading truck (1-8) is fixed on the inner wall of valve body (1)
On, the other end and the connecting rod (5) of leading truck (1-8) are slidably connected；
E, the least radius of first plug (3) is r1, the least radius of the second plug (4) is r2, third stomata (1-6)
Radius is r3And second stomata (1-5) radius be r4, and meet relational expression r1> r3, r2> r4。
7. gas pipeline water check valve according to claim 6, it is characterised in that: the other end of the leading truck (1-8) has
Have pilot sleeve (1-8-1), the connecting rod (5), which passes through pilot sleeve (1-8-1) and slides with pilot sleeve (1-8-1), to be connected
It connects.
8. gas pipeline water check valve according to claim 6, it is characterised in that: the other end of the leading truck (1-8) has
Have guiding lantern ring (1-8-2), the connecting rod (5) passes through guiding lantern ring (1-8-2) and connects with guiding lantern ring (1-8-2) sliding
It connects.
9. gas pipeline water check valve according to claim 6, it is characterised in that: first plug (3) and the second plug
It (4) is cylindrical body, and the upper surface of cylindrical body is plane.
10. gas pipeline water check valve according to claim 6, it is characterised in that: first plug (3) and the second plug
It (4) is stepped ramp type cylindrical body, the upper end of the stepped ramp type cylindrical body of first plug (3) has the first center frustum (3-1)
And first annular end face (3-2), the upper end of the stepped ramp type cylindrical body of second plug (4) have the second center frustum (4-1)
And second annular end face (4-2), the radius point of the upper surface of first center frustum (3-1) and the second center frustum (4-1)
It Wei not r3-1, r4-1, the exradius of the first annular end face (3-2) and the second annular end face (4-2) is respectively r3-2, r4-2,
And meet relational expression r3-2>r3>r3-1, r4-2>r4>r4-1。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610968853.3A CN106352152B (en) | 2016-11-03 | 2016-11-03 | Gas pipeline water check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610968853.3A CN106352152B (en) | 2016-11-03 | 2016-11-03 | Gas pipeline water check valve |
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| Publication Number | Publication Date |
|---|---|
| CN106352152A CN106352152A (en) | 2017-01-25 |
| CN106352152B true CN106352152B (en) | 2019-02-05 |
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|---|---|---|---|
| CN201610968853.3A Active CN106352152B (en) | 2016-11-03 | 2016-11-03 | Gas pipeline water check valve |
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| JP6944205B2 (en) * | 2019-12-26 | 2021-10-06 | 有限会社ジェニス・ホワイト | Condensed water storage tube |
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|---|---|---|---|---|
| GB1588904A (en) * | 1977-12-30 | 1981-04-29 | Neptune Glenfield Ltd | Fluid flow control valves |
| CN101761679B (en) * | 2009-11-20 | 2012-05-23 | 卓旦春 | Automatic exhaust valve |
| CN101922578B (en) * | 2010-09-06 | 2011-11-23 | 周智宇 | Water backflow preventing valve and water backflow preventing and gas leakage preventing automatic self-closing gas valve |
| CN102954252B (en) * | 2011-08-19 | 2014-03-12 | 淮南矿业(集团)有限责任公司 | Water drainer |
| CN103591368A (en) * | 2013-10-17 | 2014-02-19 | 沈阳建筑大学 | Anti-return-air automatic exhaust valve |
| CN204267796U (en) * | 2014-12-03 | 2015-04-15 | 巩义市金岭耐火材料有限公司 | A kind of gas pipe line rapid water seal apparatus |
| CN205401909U (en) * | 2016-01-25 | 2016-07-27 | 苏州巨瀚阀门有限公司 | Leakage prevention exhaust valve |
| CN105422944A (en) * | 2016-01-25 | 2016-03-23 | 苏州巨瀚阀门有限公司 | Anti-leakage air release valve |
| CN206175785U (en) * | 2016-11-03 | 2017-05-17 | 常州港华燃气有限公司 | Gas pipeline stagnant water valve |
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