CN108374920B - A kind of bidirectional traffics control valve - Google Patents
A kind of bidirectional traffics control valve Download PDFInfo
- Publication number
- CN108374920B CN108374920B CN201810116656.8A CN201810116656A CN108374920B CN 108374920 B CN108374920 B CN 108374920B CN 201810116656 A CN201810116656 A CN 201810116656A CN 108374920 B CN108374920 B CN 108374920B
- Authority
- CN
- China
- Prior art keywords
- fixing seat
- boss
- regulating valve
- support
- fixed column
- 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.)
- Expired - Fee Related
Links
Classifications
-
- 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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/24—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member
- F16K17/28—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only
- F16K17/30—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only spring-loaded
-
- 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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/24—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member
- F16K17/26—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in either direction
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D7/00—Control of flow
- G05D7/01—Control of flow without auxiliary power
- G05D7/0126—Control of flow without auxiliary power the sensing element being a piston or plunger associated with one or more springs
- G05D7/0133—Control of flow without auxiliary power the sensing element being a piston or plunger associated with one or more springs within the flow-path
Abstract
A kind of bidirectional traffics control valve, mainly it is made of the first fixing seat, the first spring, regulating valve, second spring and the second fixing seat, first fixing seat and the socket of the second fixing seat are connected through a screw thread, first fixing seat forms hollow cylindrical housings after connecting with the second fixing seat, the first spring, regulating valve and second spring are located in shell inner hole；Regulating valve is placed in the space formed after the first fixing seat is connected with the second fixing seat, by the way that the first spring, regulating valve and second spring are sequentially sleeved in the first fixed column, the end of the first fixed column is inserted into again in the second location hole of the second fixed column, realize that the liquid for no matter entering shell or gas are flowed toward which direction, regulating valve can play the role of controlling flow.
Description
Technical field
No matter liquid in pipeline or gas are that flowing can control flow forward or backwards the present invention relates to a kind of
Two-way valve belongs to the optimisation technique of flow control valve.
Background technique
Connection between water supply pipe, the connection between water pipe and faucet are realized by connector.To building
Supply water, it is general there are two types of mode, one is use booster pump from bottom to top send water mode, one is disposing water tank in roof,
By water-head convey from top to bottom in the way of.Either any to send water mode, different floor hydraulic pressure also can be different, can lead
Cause different floor water yields different.Therefore, the water pipe head design now with some with balanced-out water, it is intended to make different buildings
The water yield of layer tends to identical.
Especially domestic consumer, since each leading purposes is different, the requirement to water yield is also different, such as the wash vegetables in kitchen
Washing one's face for faucet and toilet and sprays head etc. at faucet, and due to the difference of purposes, the requirement to water yield is also different, such as washes
It is just much of that the water yield of face faucet is maintained at 4 liters/min, and sprays the water yield requirement of head at 8 liters/min or more.
Adjusting for gas flow, there is also the same problems.In general, the flow direction of liquid-transport pipe-line or gas pipeline is all
Unidirectional, there is the valve of some control flows for being suitable for liquid-transport pipe-line or gas pipeline, but these valves are usually applicable only to
Control unidirectional flow.But in some special occasions, may there are problems that reverse flow, the valve of existing control liquid measure
Be typically only capable to unidirectionally controlled flow, when in pipeline liquid or gas need reverse flow when, these valves cannot play control
The effect of liquid measure processed may interfere the reverse flow of liquid or gas instead.
It is, thus, sought for a kind of, no matter liquid in pipeline or gas are that forward flow or reverse flow can rise
To the flow control valve of the effect of control flow.
Summary of the invention
The object of the present invention is to provide it is a kind of no matter liquid in pipeline or gas be forward flow or reverse flow all
It can play the role of controlling the flow control valve of flow.
The technical scheme is that a kind of bidirectional traffics control valve, mainly by the first fixing seat 1, the first spring 2, tune
Valve 3, second spring 4 and the second fixing seat 5 composition are saved, the first fixing seat and the second fixing seat are socketed or are connected through a screw thread, the
One fixing seat forms hollow cylindrical housings after connecting with the second fixing seat, the first spring, regulating valve and second spring are located at
In shell inner hole；It is equipped in the first fixing seat inner wall to the one of inner process and encloses first boss 11, in the first fixing seat far from second
It is equipped with first support 12 between one end and first boss 11 of fixing seat, is equipped at the center of first support 12 fixed towards second
Seat cylindrical first fixed column 13 outstanding is equipped with to the one of inner process in 5 inner wall of the second fixing seat and encloses second boss 51, the
It is equipped with second support 52 between two fixing seats one end and second boss far from the first fixing seat, is equipped at the center of second support
Towards the second fixed column of cylinder 53 of the first fixing seat, the second fixed column is equipped with far from the end of second support to second support
The second location hole 54 of direction recess；The regulating valve 3 is equipped with the central through hole cooperated with the first fixed column, in the work of external force
Under, regulating valve 3 can be moved forward and backward along the first fixed column；The regulating valve is along its center vertical with shell central axes
Section is divided into the part towards first support and the part towards second support, towards the part of first support and towards second
The part of frame mirror image each other；The regulating valve is cone towards the part of first support, and the vertex of a cone is towards first support；Assembling
When, by the first spring pocket in the first fixed column, then valve pocket will be adjusted and covered in the first fixed column, then by second spring first
In fixed column, finally the first fixing seat is connected with the second fixing seat, enters the first fixed column far from the end of first support
Second location hole 54；The stop bit cylinder extended to second support direction, the stop bit circle are set around the first fixed column root
The end of column is between first support and the central point of first boss；The center that the outer diameter of second fixed column is greater than regulating valve is logical
The aperture in hole, the length of the second fixed column is less than the distance between second support to second boss central point；In use, by two-way
Flow control valve is filled in pipeline and is positioned, and when the upstream end of shell has enough pressure, pressure overcomes the first spring or second
The first spring of pre-stressed compression or second spring of spring keep regulating valve mobile to the direction of outlet end, and regulating valve is convex to second
Platform or first boss are mobile, keep the gap between regulating valve and second boss or first boss smaller and smaller, when regulating valve maximum
When the position of outer diameter is moved to second boss or the smallest place in first boss aperture, by the position-limiting action of the second fixed column or the
The position-limiting action of stop bit cylinder in one fixed column, regulating valve stop movement.
When no hydraulic or air pressure pushes regulating valve, regulating valve between first boss and second boss in
Heart point.
When no hydraulic or air pressure pushes regulating valve, the wall surface of first boss and second boss towards regulating valve is mutual
For mirror image, the two shape is identical, and size is also identical.
The external screw thread to match with the internal screw thread in inner bore of pipeline is set outside shell, shell is screwable into pipeline.
The outwardly projecting circle flange of setting in one end of shell, it is prominent on shell after filling in shell in pipeline
Edge by pipe ends extruding and play the role of positioning.
Directly the both ends of shell are connected by screw thread with the both ends of pipeline respectively or are connected by socket or are directly welded
Together.
The utility model has the advantages that
1, regulating valve is placed in the space formed after the first fixing seat is connected with the second fixing seat, by by the first bullet
Spring, regulating valve and second spring are sequentially sleeved in the first fixed column, then the end of the first fixed column is inserted into the second fixed column
In second location hole, realize that the liquid for no matter entering shell or gas are flowed toward which direction, regulating valve can play control
The effect of flow.
Detailed description of the invention
Fig. 1 is the surface structure schematic diagram of an angle of the invention；
Fig. 2 is the surface structure schematic diagram of another angle of the invention；
Fig. 3 is explosive view of the invention；
Fig. 4 is the fragmentary sectional view of Fig. 3；
Fig. 5 is the partial cutaway schematic that the present invention is in pressure balance；
Fig. 6 is that right atrial pressure that the present invention is subject in regulating valve is larger and the partial cutaway schematic that is moved to the left.
Specific embodiment
As shown in Fig. 1 to Fig. 6, a kind of bidirectional traffics control valve, mainly by the first fixing seat 1, the first spring 2, regulating valve
3, second spring 4 and the second fixing seat 5 composition, the first fixing seat form hollow circular cylindrical shell after connecting with the second fixing seat
Body, the first spring, regulating valve and second spring are located in shell inner hole.
It is equipped in the first fixing seat inner wall to the one of inner process and encloses first boss 11, it is fixed far from second in the first fixing seat
It is equipped with first support 12 between one end and first boss 11 of seat, is equipped at the center of first support 12 prominent towards the second fixing seat
The first fixed column of cylinder 13 out is equipped with to the one of inner process in 5 inner wall of the second fixing seat and encloses second boss 51, solid second
It is equipped with second support 52 between reservation one end and second boss far from the first fixing seat, is equipped with direction at the center of second support
The second fixed column of cylinder 53 of first fixing seat, the second fixed column are equipped with far from the end of second support to second support direction
The second location hole 54 of recess；The regulating valve 3 is equipped with the central through hole cooperated with the first fixed column, in the effect of external force
Under, regulating valve 3 can be moved forward and backward along the first fixed column；The regulating valve along its it is vertical with shell central axes in it is anxious
Face is divided into the part towards first support and the part towards second support, towards the part of first support and towards second support
Part mirror image each other；The regulating valve is cone towards the part of first support, and the vertex of a cone is towards first support；Assembling
When, by the first spring pocket in the first fixed column, then valve pocket will be adjusted and covered in the first fixed column, then by second spring first
In fixed column, finally the first fixing seat is connected with the second fixing seat, enters the first fixed column far from the end of first support
Second location hole 54.
First fixing seat and the socket of the second fixing seat are connected through a screw thread, or are welded directly together.
When no hydraulic or air pressure pushes regulating valve, regulating valve between first boss and second boss in
Heart point.When no hydraulic or air pressure pushes regulating valve, first boss and second boss towards regulating valve wall surface each other
Mirror image, i.e. the two shape is identical, and size is also identical.
It is arranged around the central through hole of regulating valve for fixing the first spring on end face of the regulating valve towards first support
The first groove, on end face of the regulating valve towards second support around regulating valve central through hole be arranged for fixing the second bullet
Second groove of spring.
For the enabling capabilities for reinforcing first support, by the connecting portion of first support and first boss along the outer of first boss
Wall extends to the smallest place in first boss aperture.
For the enabling capabilities for reinforcing second support, by the connecting portion of second support and second boss along the outer of second boss
Wall extends to the smallest place in second boss aperture.
The first support and second support is linear type or triangle or cross.
13 outer wall of the first fixed column between 12 center of first boss 11 and first support is equipped with outwardly projecting stop bit
Flange, the central point for preventing regulating valve from crossing first boss is mobile to the direction of first support, i.e. regulating valve largest outside diameter
Place reach the smallest place in first boss aperture after, by the inhibition of the first fixed column outer wall stop bit flange, regulating valve
Can not be mobile to the direction of first support again, i.e., the pressure that ought be applied in regulating valve is more than preset Pressure maximum value
When, regulating valve can not be pushed mobile to the direction of first support again.
The stop bit flange for being located at the first fixed column outer wall, can also be around the first fixed column root to second
The stop bit cylinder or a stop bit rib that frame direction extends, the end of the stop bit cylinder or stop bit rib are located at first support and the
Between the central point of one boss, likewise, after the place of regulating valve largest outside diameter reaches the smallest place in first boss aperture, just
The inhibition that will receive stop bit cylinder or stop bit rib can not be mobile to the direction of first support again.
The outer diameter of second fixed column is greater than the aperture of the central through hole of regulating valve, and the length of the second fixed column is less than second
Frame is the distance between to second boss central point, for preventing regulating valve from crossing the central point of second boss to the side of second support
To movement, i.e. after the place of regulating valve largest outside diameter reaches the smallest place in second boss aperture, by the obstruction of the second fixed column
Effect, regulating valve can not be mobile to the direction of second support again, i.e., the pressure that ought be applied in regulating valve is more than to preset
Pressure maximum value when, can not push regulating valve mobile to the direction of second support again.
In use, by being positioned in bidirectional traffics control valve plug inlet pipe road, when the upstream end of shell has enough pressure, pressure
Power overcomes the first spring of pre-stressed compression or second spring of the first spring or second spring, makes direction of the regulating valve to outlet end
Mobile, regulating valve is mobile to second boss or first boss, gets over the gap between regulating valve and second boss or first boss
It is next smaller, when the position of regulating valve maximum outside diameter is moved to second boss or first boss aperture is the smallest local, by second
The position-limiting action of stop bit flange on the position-limiting action of fixed column or the first fixed column, regulating valve stop movement, second spring and
First spring will not further be compressed.
To realize the positioning of bidirectional traffics control valve in the duct, setting and the internal screw thread phase in inner bore of pipeline outside shell
Matched external screw thread, shell is screwable into pipeline, or in the outwardly projecting circle flange of one end of shell setting, being used for will
After shell is filled in pipeline, flange on shell by pipe ends extruding and play the role of positioning；Alternatively, directly by shell
Both ends be connected respectively with the both ends of pipeline by screw thread or by be socketed be connected or be welded directly together.
Above-described embodiment is intended merely to interpretation purposes of the invention, and is not limitation of the present invention, this technology
The those of ordinary skill in field makes a variety of changes or substitutes within the essential scope of the present invention, also should belong to guarantor of the invention
Protect scope.
Claims (6)
1. a kind of bidirectional traffics control valve, it is characterised in that: mainly by the first fixing seat (1), the first spring (2), regulating valve
(3), second spring (4) and the second fixing seat (5) composition, the first fixing seat and the socket of the second fixing seat are connected through a screw thread,
First fixing seat forms hollow cylindrical housings, the first spring, regulating valve and second spring position after connecting with the second fixing seat
In shell inner hole；It is equipped in the first fixing seat inner wall to the one of inner process and encloses first boss (11), it is separate in the first fixing seat
First support (12) are equipped between one end of second fixing seat and first boss (11), are equipped with court at the center of first support (12)
To the second fixing seat cylindrical first fixed column (13) outstanding, the circle to inner process is equipped in the second fixing seat (5) inner wall
Second boss (51) in the one end of the second fixing seat far from the first fixing seat and is equipped with second support (52) between second boss,
It is equipped with the second fixed column of cylinder (53) towards the first fixing seat at the center of second support, the second fixed column is far from second
The end of frame is equipped with the second location hole (54) being recessed to second support direction；The regulating valve (3) is equipped with fixes with first
The central through hole of column cooperation, under the effect of external force, regulating valve (3) can be moved forward and backward along the first fixed column；The tune
It saves valve and is divided into the part towards first support and the part towards second support along its center section vertical with shell central axes,
Part towards first support and the part towards second support mirror image each other；The regulating valve is towards the part of first support
For cone, the vertex of a cone is towards first support；When assembling, by the first spring pocket in the first fixed column, then valve pocket will be adjusted the
In one fixed column, then second spring covered in the first fixed column, the first fixing seat is connected with the second fixing seat finally, makes
One fixed column enters second location hole (54) far from the end of first support；It is arranged around the first fixed column root to second support
The stop bit cylinder that direction extends, the end of the stop bit cylinder is between first support and the central point of first boss；
The outer diameter of second fixed column is greater than the aperture of the central through hole of regulating valve, and the length of the second fixed column is arrived less than second support
The distance between second boss central point；In use, by being positioned in bidirectional traffics control valve plug inlet pipe road, when the upstream end of shell
When having enough pressure, pressure overcomes the first spring of pre-stressed compression or second spring of the first spring or second spring, makes to adjust
It is mobile to the direction of outlet end to save valve, regulating valve is mobile to second boss or first boss, makes regulating valve and second boss or the
Gap between one boss is smaller and smaller, when the position of regulating valve maximum outside diameter is moved to second boss or first boss aperture most
When small place, by the position-limiting action of the stop bit cylinder in the position-limiting action of the second fixed column or the first fixed column, regulating valve is stopped
Only move.
2. bidirectional traffics control valve according to claim 1, it is characterised in that: push regulating valve in no hydraulic or air pressure
When, central point of the regulating valve between first boss and second boss.
3. bidirectional traffics control valve according to claim 1, it is characterised in that: push regulating valve in no hydraulic or air pressure
When, towards the wall surface mirror image each other of regulating valve, the two shape is identical for first boss and second boss,
Size is also identical.
4. bidirectional traffics control valve according to claim 1, it is characterised in that: outside shell in setting and inner bore of pipeline
The external screw thread that internal screw thread matches, shell is screwable into pipeline.
5. bidirectional traffics control valve according to claim 1, it is characterised in that: in one end of shell, setting is outwardly projecting
One circle flange, after shell is filled in pipeline, flange on shell by pipe ends extruding and play the role of positioning.
6. bidirectional traffics control valve according to claim 1, it is characterised in that: directly by the both ends of shell respectively with pipeline
Both ends by screw thread be connected or by be socketed be connected or be welded directly together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810116656.8A CN108374920B (en) | 2016-01-07 | 2016-01-07 | A kind of bidirectional traffics control valve |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610012721.3A CN105508676B (en) | 2016-01-07 | 2016-01-07 | A kind of bidirectional traffics control valve |
| CN201810116656.8A CN108374920B (en) | 2016-01-07 | 2016-01-07 | A kind of bidirectional traffics control valve |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610012721.3A Division CN105508676B (en) | 2016-01-07 | 2016-01-07 | A kind of bidirectional traffics control valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108374920A CN108374920A (en) | 2018-08-07 |
| CN108374920B true CN108374920B (en) | 2019-07-02 |
Family
ID=55716872
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810116656.8A Expired - Fee Related CN108374920B (en) | 2016-01-07 | 2016-01-07 | A kind of bidirectional traffics control valve |
| CN201610012721.3A Active CN105508676B (en) | 2016-01-07 | 2016-01-07 | A kind of bidirectional traffics control valve |
| CN201810116264.1A Pending CN108386586A (en) | 2016-01-07 | 2016-01-07 | A kind of flow control valve |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610012721.3A Active CN105508676B (en) | 2016-01-07 | 2016-01-07 | A kind of bidirectional traffics control valve |
| CN201810116264.1A Pending CN108386586A (en) | 2016-01-07 | 2016-01-07 | A kind of flow control valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (3) | CN108374920B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108374920B (en) * | 2016-01-07 | 2019-07-02 | 上海安巢在线控制技术股份有限公司 | A kind of bidirectional traffics control valve |
| CN107725853B (en) * | 2017-11-14 | 2023-12-05 | 吉林大学 | Pressure-based flow self-regulating control valve |
| CN113757425A (en) * | 2021-08-31 | 2021-12-07 | 西安热工研究院有限公司 | Wide-load self-adaptive variable flow area throttling and pressure stabilizing structure and method |
| CN114233902A (en) * | 2021-11-09 | 2022-03-25 | 中国长江电力股份有限公司 | Gauge front pipe fitting capable of being automatically closed in case of pressure loss |
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| DE1708082A1 (en) * | 1966-05-23 | 1971-04-22 | Hugo Rickenbach | Facility for air raids |
| DE2547470A1 (en) * | 1975-10-23 | 1977-04-28 | Interatom | Safety valve closure upstream of burst duct - has spring-loaded closure plug actuated by change in flow dynamics |
| US5280131A (en) * | 1992-07-06 | 1994-01-18 | Sarro Claude A | Fluid-filled electric power cable system with two-way piston check valve |
| CN104653917A (en) * | 2013-11-25 | 2015-05-27 | 中山市雅西环保科技有限公司 | Bidirectional adjustment water pipe joint |
| CN204717186U (en) * | 2015-06-10 | 2015-10-21 | 长乐市丽智产品设计有限公司 | A kind of water supply pipe flow control valve |
| CN105508676A (en) * | 2016-01-07 | 2016-04-20 | 中山市雅西环保科技有限公司 | Bidirectional flow control valve |
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| DE2303431C2 (en) * | 1973-01-24 | 1983-12-15 | Anton Piller Kg, 3360 Osterode | Quick-closing valve for ventilation lines in shelter structures |
| GB8708655D0 (en) * | 1987-04-10 | 1987-05-13 | Compair Power Tools Ltd | Safety valve |
| CN2809373Y (en) * | 2004-12-07 | 2006-08-23 | 陈俊平 | Two-way stop valve |
| CN2883835Y (en) * | 2006-03-16 | 2007-03-28 | 鲍峰 | Liquid flow auto-balancing regulating valve |
| CN201173360Y (en) * | 2008-01-31 | 2008-12-31 | 赖建辅 | Bidirectional stop type fast joint improvement structure |
| CN202349316U (en) * | 2011-10-21 | 2012-07-25 | 宁波力利智能控制设备有限公司 | Anti-surging device for gas pressure regulator |
| CN102537449B (en) * | 2011-12-07 | 2013-08-28 | 三一重型装备有限公司 | Bidirectional self-adaptive damping valve |
| CN203516869U (en) * | 2013-07-23 | 2014-04-02 | 北汽福田汽车股份有限公司 | Two-way pressure valve and automobile cooling system comprising same |
| CN203453563U (en) * | 2013-09-09 | 2014-02-26 | 苏州萃智新技术开发有限公司 | Double-pipe balance valve |
| CN103591344A (en) * | 2013-11-28 | 2014-02-19 | 天津市国威给排水设备制造有限公司 | Two-way controllable non-return valve |
| CN203770770U (en) * | 2014-01-13 | 2014-08-13 | 胡光荣 | Two-directional flow valve |
| CN104964077A (en) * | 2015-05-20 | 2015-10-07 | 天津斯维克阀业有限公司 | Bi-directional flow-limiting valve |
-
2016
- 2016-01-07 CN CN201810116656.8A patent/CN108374920B/en not_active Expired - Fee Related
- 2016-01-07 CN CN201610012721.3A patent/CN105508676B/en active Active
- 2016-01-07 CN CN201810116264.1A patent/CN108386586A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1708082A1 (en) * | 1966-05-23 | 1971-04-22 | Hugo Rickenbach | Facility for air raids |
| DE2547470A1 (en) * | 1975-10-23 | 1977-04-28 | Interatom | Safety valve closure upstream of burst duct - has spring-loaded closure plug actuated by change in flow dynamics |
| US5280131A (en) * | 1992-07-06 | 1994-01-18 | Sarro Claude A | Fluid-filled electric power cable system with two-way piston check valve |
| CN104653917A (en) * | 2013-11-25 | 2015-05-27 | 中山市雅西环保科技有限公司 | Bidirectional adjustment water pipe joint |
| CN204717186U (en) * | 2015-06-10 | 2015-10-21 | 长乐市丽智产品设计有限公司 | A kind of water supply pipe flow control valve |
| CN105508676A (en) * | 2016-01-07 | 2016-04-20 | 中山市雅西环保科技有限公司 | Bidirectional flow control valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108374920A (en) | 2018-08-07 |
| CN108386586A (en) | 2018-08-10 |
| CN105508676B (en) | 2018-03-27 |
| CN105508676A (en) | 2016-04-20 |
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