CN109027346A - Non-return air valve - Google Patents
Non-return air valve Download PDFInfo
- Publication number
- CN109027346A CN109027346A CN201811071922.6A CN201811071922A CN109027346A CN 109027346 A CN109027346 A CN 109027346A CN 201811071922 A CN201811071922 A CN 201811071922A CN 109027346 A CN109027346 A CN 109027346A
- Authority
- CN
- China
- Prior art keywords
- tube body
- sliding slot
- return air
- air valve
- activity adjustment
- 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.)
- Pending
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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
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/06—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure
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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
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/06—Check valves with guided rigid valve members with guided stems
- F16K15/063—Check valves with guided rigid valve members with guided stems the valve being loaded by a spring
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
The invention belongs to check valve technical fields.Solve the problems, such as that existing Non-return air valve starting differential pressure is fixed.This Non-return air valve is equipped with air inlet (3) on the end face (2) of tube body (1), spool (4) and adjustment spring (5) are equipped in tube body (1), activity adjustment column (6) are equipped in tube body (1), activity adjustment column (6) can be axially moved in the circular cavity of tube body (1), adjustment spring (5) is arranged between spool (4) and activity adjustment column (6), make spool (4) that closure air inlet (3) on end face (2) can be withstood on, activity adjustment column (6) side wall is equipped with annular convex platform (7), annular convex platform (7) is equipped with and opens up at least two sliding slots (8) forward from rear end, the depth of adjacent sliding slot (8) its slot successively differs certain height, tube body (1) inner wall is equipped with the convex ribs (9) that may be stuck in sliding slot (8), the starting differential pressure of Non-return air valve can be adjusted Section.
Description
Technical field
The invention belongs to check valve technical fields.
Background technique
In application number: 201510291645X, a kind of denomination of invention: vacuum suction cup Reed type Non-return air valve device
Chinese patent literature in disclose a kind of Non-return air valve device, be made of pedestal, sheet rubber, spring and nut cap；Its feature
Be: the sheet rubber is the oblate rubber sheet of surfacing, the half of middle section diameter outside a diameter of nut cap；Institute
The pedestal shape stated is bolt, and center is through-hole, and the diameter of through-hole is the one third of sheet rubber diameter, the upper end of the through-hole
Rounded corner is loudspeaker D；The spring outer diameter is 2/3rds of sheet rubber diameter, and length is that sheet rubber diameter is identical；It is described
Nut cap be circular cone column, while being gas nozzle dock with air-breathing system again, internal for three sections of through-holes, i.e. lower section is and pedestal
The corresponding screw hole of screw thread, upper section are the through-hole with chassis interior through-hole same apertures, and the length is three points of sheet rubber diameter
Two, middle section through-hole diameter and length are 12 times of sheet rubber diameter；Successively by spring, sheet rubber and pedestal from nut cap bottom
Portion's through-hole is installed inward, that is, it is whole to form a Reed type Non-return air valve device.The disadvantage is that being solid there is starting differential pressure
Fixed, the problem of can not can be adjusted as needed.
Summary of the invention
The purpose of the present invention is to provide a kind of by pressing the Non-return air valve converted to realize starting differential pressure adjusting.
To achieve the purpose of the present invention, the Non-return air valve includes tube body, and the tube body front end is equipped with end face,
The end face is equipped with air inlet, and spool and adjustment spring are equipped in the tube body, activity is equipped in the tube body and adjusts
Segmented column, the activity adjustment column can be axially moved in the circular cavity of tube body, the described adjustment spring setting spool with
It between activity adjustment column, withstands on spool and blocks air inlet on end face, the activity adjustment column side wall is equipped with annular
Boss, the annular convex platform are equipped with the sliding slot opened up forward from rear end, the sliding slot at least two, and adjacent cunning
Slot, the depth of slot successively differ certain height, and the inboard wall of tube body is equipped with convex ribs, and the convex ribs may be stuck in sliding slot
In, allow the longitudinal movement in tube body of activity adjustment column, until being detached from convex ribs.
The active force that spool blocks on air inlet is determined by the elastic force of adjustment spring.Adjustment spring quilt in tube body
It is compressed between spool and activity adjustment column, after the distance between spool and activity adjustment column determine that adjustment spring is compressed
Length.And the length after adjustment spring is compressed determines the starting differential pressure value of Non-return air valve.The adjusting bullet of different length
Spring respectively corresponds different starting differential pressure values.As long as existing in use, adjusting convex ribs by pressing rotary moveable adjustable column
Position in each sliding slot, convex ribs are withstood in the different sliding slot of each depth, not due to position of the activity adjustment column in tube body
Together, cause adjustment spring different by compressed length in tube body, therefore generate different elastic force and suppress on spool, thus
Realize the adjusting to the starting differential pressure of Non-return air valve.It is simple with structure, it is small in size, the advantages of being conveniently adjusted.
Detailed description of the invention
The drawing of attached drawing is described as follows:
Fig. 1 is Non-return air valve assembling stereogram of the present invention.
Fig. 2 is another angle three-dimensional view of Fig. 1 middle tube body.
Fig. 3 is the structure sectional view that Non-return air valve of the present invention is in the first state.
Fig. 4 is the structure sectional view that Non-return air valve of the present invention is in second of state.
Fig. 5 is that dotted line around axial line makees annular section view expanded schematic diagram to annular convex platform, convex ribs and top along Fig. 4.
Fig. 6 is that there are two the different sliding slot of convex ribs, two groups of three kinds of depth and top expanded schematic diagrams for tool.
Fig. 7 is convex ribs, sliding slot, the combined normality schematic diagram in top in Fig. 6.
Fig. 8 is that the end face of activity adjustment column in Fig. 7 is slipped to the status diagram on top surface from end.
Fig. 9 is the status diagram of key automatic rebounding after unclamping key in Fig. 8.
Figure 10 is that end face slips over to sliding slot the status diagram reached on convex ribs from top surface rotation in Fig. 9.
Specific embodiment
With reference to the accompanying drawing, the specific embodiment of Non-return air valve of the present invention and its door and window is described in further detail:
As shown in Fig. 1~4, Non-return air valve of the present invention includes tube body 1, and 1 front end of tube body is equipped with end face 2, and end face 2 is equipped with
Air inlet 3 is equipped with spool 4 and adjustment spring 5 in tube body 1, is equipped with activity adjustment column 6 in tube body 1, activity adjustment column 6 can be in pipe
It is axially moved in the circular cavity of body 1, adjustment spring 5 is arranged between spool 4 and activity adjustment column 6, withstands on spool 4
Air inlet 3 is blocked on end face 2,6 side wall of activity adjustment column is equipped with annular convex platform 7, and annular convex platform 7 is equipped with and opens forward from rear end
If sliding slot 8, sliding slot 8 at least two, and adjacent sliding slot 8, the depth of slot successively differs certain height, in tube body 1
Wall is equipped with convex ribs 9, and convex ribs 9 may be stuck in sliding slot 8, allows the longitudinal movement in tube body 1 of activity adjustment column 6, until being detached from
Convex ribs 9.
The circular cavity of tube body 1 refers to that its section cavity is rounded, rotates activity adjustment column 6 wherein.Annular
Boss 7 is the protrusion part being arranged in around cylindrical core.Due to there is an annular convex platform 7 on 6 side wall of activity adjustment column, and tube body
There are convex ribs 9 on 1 inner sidewall, therefore the gear of convex ribs 9, on annular convex platform 7, mainly gear can limit spool 4 in the bottom of sliding slot 8
It moves backward.
The combination of convex ribs 9 and sliding slot 8, on the one hand, when convex ribs 9 are stuck in sliding slot 8, activity adjustment column 6 can be made along axial direction
Movement, prevents it to be rotated about axis.On the other hand, once activity adjustment column 6 is pressed, so that convex ribs 9 are deviate from from sliding slot 8,
Then activity adjustment column 6 can be rotated about axis.
Several corresponding sliding slots 8 of one section of convex ribs 9, the depth of each sliding slot 8 are different.In this way, when convex ribs 9 fall in difference
Sliding slot 8 in, activity adjustment column 6 is relative to spool 4 apart from difference.As shown in Figure 5, dotted line will be on annular convex platform 7 in figure
Inclined-plane be divided into two parts, wherein left-hand component indicate be sliding slot 8 bottom surface 11, right-hand component indicate annular convex platform
7 end face 10.It is provided with three groups of different sliding slots 8 of two kinds of depth on the annular convex platform 7 of activity adjustment column 6, amounts to six cunnings
Slot 8.The convex ribs 9 being spacedly distributed there are three being set on 1 inner wall of tube body.When work, a spool 4 will receive the branch of three convex ribs 9
Support, i.e. three convex ribs 9 can fall in three identical deeper sliding slots 8 or shallower sliding slot 8 simultaneously, two kinds of starting differential pressures may be implemented
Switching is adjusted.
As shown in Figure 6, dotted line is benchmark line in figure, indicates the position under movable sliding 8, convex ribs 9,14 normalities of top
Relationship.It is moved along the reference line, as shown in dotted line vertical in figure, sliding slot 8 can be snapped on convex ribs 9.In activity adjustment column 6
It is provided with two groups of different sliding slots 8 of three kinds of depth on annular convex platform 7, amounts to six sliding slots 8.1 inner wall of tube body is equipped with two etc.
The convex ribs 9 being spaced apart, two convex ribs 9 are respectively in first left sliding slot 8 and the 4th 8 position of sliding slot.When work, one
A activity adjustment column 6 will receive the support of two convex ribs 9, i.e. two convex ribs 9 can be fallen in simultaneously in two identical sliding slots 8, altogether
Meter is in the sliding slot 8 of deep, intermediate, shallow three kinds of different depths, forms three kinds of location status.
As shown in Figure 7, in the case of normality, convex ribs 9 can be fallen in any one sliding slot 8.In the figure,
Two articles of convex ribs 9 have been respectively fallen in first and the 4th same shallowly two sliding slots 8 of depth.Key 13 is pushed according to the direction F2,
Top 14 thereon can withstand on the end face 10 of annular convex platform 7, and activity adjustment column 6 can be made to move upwards.For convex ribs 9,
It is equivalent to the dotted line position of convex ribs 9 from figure of convex ribs 9 and moves downwardly to realization position.
As shown in Figure 8, annular convex platform 7 will be moved upwards by the external force in the direction F2 on key 13.
The end face 10 of annular convex platform 7 is moved to the direction of the bottom surface 11 far from sliding slot 8 on activity adjustment column 6, and top 14 will be kept along point
Setting-out track is pushed up to the end face of annular convex platform 7 10, until the end face 10 of annular convex platform 7 and the top surface 12 of convex ribs 9 are in contact line
Position, as shown in horizontal dotted line in figure.Since activity adjustment column 6 is regulated the elastic force effect of spring 5, activity adjustment column always
6 start to move to the direction F1, start simultaneously at and move to the direction F3, if convex ribs 9 leave from the bottom surface of sliding slot 8 11 in figure, such as dotted line
Shown in part, until entering sliding intermediate state as shown in Figure 8.So-called sliding intermediate state.It is exactly the end face 10 of boss 7
It is slided since on the end 15 of the top of key 13 14, the status diagram on the top surface 12 for withstanding on convex ribs 9.At this point, top
First 14 fall in sliding slot 8, so that activity adjustment column 6 is blocked and can not be rotated by top 14.
As shown in Figure 9, key 13 is unclamped, annular convex platform 7 continues the elastic force effect for being regulated spring 5, will start edge
The direction F3 moves downward.Until the end face 10 of annular convex platform 7 and the end 15 of top 14 are in contact line position, such as level in figure
Shown in dotted line.At this point, top 14 has left sliding slot 8, so that activity adjustment column 6 is released and starts to have rotated.
As shown in Figure 10, sliding slot 8 is once skidded off from convex ribs 9, since the end face 10 of boss 7 also withstands on convex ribs 9 at this time
Top surface 12 on, the inclined-plane mutual extrusion of the two so that annular convex platform 7 then start generate rotation, sliding slot 8 thereon will be to the side F1
To movement a distance, starts simultaneously at and moved to the direction F3, until enter end-state as shown in Figure 10, this completes
Convex ribs 9 enter the conversion of second left sliding slot 8 from first left sliding slot 8.
It loops back and forth like this, every to press key 13, top 14 thereon will jack up activity adjustment column 6, living
Dynamic adjustable column 6 rotates, and convex ribs 9 will be sequentially inserted into next adjacent sliding slot 8, and three kinds of starting differential pressures may be implemented
Cyclic switching is adjusted.
According to Hooke's law F=kx or △ F=k Δ x, between above-mentioned every two state, spool 4 is blocked in air inlet
There is pressure difference △ F=k Δ x for elastic force on 3, and wherein k is the coefficient of elasticity of adjustment spring 5, and F is elastic force, and x adjusts bullet
Spring deformation distance.Therefore, this Non-return air valve can be easy to as needed or require design a variety of starting differential pressure values.
As long as in use, from the tail end of tube body 1 press activity adjustment column 6, so that it is travelled forward, until 9 front end of convex ribs from
Most deep sliding slot 8 skids off, then activity adjustment column 6 is rotated an angle, and convex ribs 9 is made to fall into the sliding slot 8 of intermediate depth again, living
Dynamic adjustable column 6 can changes delta x at a distance from spool 4.Similarly, then by convex ribs 9 from the sliding slot 8 of intermediate depth it adjusts to most shallow
Sliding slot 8, in this way, can realize the variations of two, three starting differential pressures by adjusting activity adjustment column 6, being formed has unlatching
The adjustable Non-return air valve of pressure difference.The sliding slot 8 that different number, different depth can be set as needed, can form multistage
The regulatory function of starting differential pressure.
1 inner sidewall of tube body is equipped at least two equally distributed convex ribs 9, and annular convex platform 7 is corresponding equipped at least two groups
The sliding slot 8 of distribution.
Above-mentioned most deep, intermediate depth the and most shallow three kinds sliding slots 8 that are spacedly distributed are generalized into one group of sliding slot 8, are made
It corresponds to a convex ribs 9, so that it may realize the variation adjustment structure of three starting differential pressures.And two convex ribs 9 are symmetrical, it is corresponding
Two groups of sliding slots 8 be sequentially distributed in most deep slot, the slot of intermediate depth, most shallow slot, most deep slot, the slot of intermediate depth, most
Shallow slot, and be the circulation with specific rule variation.In use, as long as activity adjustment column 6 is made to rotate a small angle
It can be carried out adjusting.Activity adjustment column 6 is supported in tube body 1 by two convex ribs 9, under any position stress, any state
Movement, stationarity, smoothly property can be consistent.
The end face 10 of the annular convex platform 7 at position is arranged to inclined-plane between adjacent sliding slot 8.Press the end face of annular convex platform 7
10, activity adjustment column 6 can be made to move to 3 direction of air inlet.Once activity adjustment column 6 is depressed to the top surface 12 of convex ribs 9
It sets, sliding slot 8 is then deviate from from convex ribs 9, at this point, activity adjustment column 6 can rotate in the circular cavity of tube body 1.Due to external force
It acts on the inclined-plane of end face 10, activity adjustment column 6 can rotate automatically.As long as slightly a bit by the rotation of activity adjustment column 6, making it
There are a point contact in the end face 10 of upper annular convex platform 7 and the top surface 12 of convex ribs 9, in the case where pressing force loses, activity adjustment column 6
It can then be moved automatically away from the direction of air inlet 3 under the elastic force effect of adjustment spring 5, while keep rotating, until turning
The bottom surface 11 of next sliding slot 8 is touched to the top surface of convex ribs 9 12.
The bottom surface 11 of phase sliding slot 8 is arranged to inclined-plane.No matter the top surface 12 of convex ribs 9 touches appointing on the bottom surface 11 of sliding slot 8
What position, the inclined-plane of the two can form face contact.Once losing external force, elastic force of the activity adjustment column 6 in adjustment spring 5
Under effect, it will moved toward far from 3 direction of air inlet.And due to the effect of oppressing on inclined-plane, activity adjustment column 6 also has rotation
Turn movement or trend, make sliding slot 8 on one side lean against always convex ribs 9 while.No matter gap between sliding slot 8 and convex ribs 9 or
Between be separated with much, as long as being pressed along one side of the convex ribs 9 to activity adjustment column 6 with a bar or rod, can necessarily withstand on
On end face 10.
The top surface 12 of convex ribs 9 is arranged to inclined-plane.Once the end face 10 of boss 7 is fallen on the top surface 12 of convex ribs 9, activity adjustment
Column 6 can generate rotation under the elastic force effect of adjustment spring 5 in tube body 1, and making convex ribs 9, sliding is fallen into sliding slot 8 automatically.
The key 13 that is axially movable and can touch activity adjustment column 6 is equipped in tube body 1.1 tail end of tube body is equipped with one
The tail end of a circular hole, key 13 is exposed except tube body 1 by circular hole, is pressed convenient for finger.As long as in use, pressing lightly on one
Lower key 13, the front end of key 13 just will push activity adjustment column 6 and move to 3 direction of air inlet, make convex on activity adjustment column 6
Deviate from the slave sliding slot 8 of muscle 9.
Key 13 is equipped with top 14, and the setting of end 15 for coming directly towards 14 is in inclined-plane.It is set on activity adjustment column 6 in the present embodiment
There are six inclined-planes.Correspondingly on key 13 altogether setting there are six top 14, the end for coming directly towards 14 also is provided with inclined-plane, so as to ring
Face and face contact are realized in the end face 10 of shape boss 7, and promotion is smooth, are hardly damaged.After convex ribs 9 leave sliding slot 8, activity adjustment column
6 in can be with rotary state.Since the top 14 on key 13 is withstood on the inclined-plane of end face 10 of annular convex platform 7, work is forced
Dynamic adjustable column 6 rotates.Therefore, in use, every press key 13, activity adjustment column 6 can then be automatically brought to adjacent one
In sliding slot 8, the gradually rotation conversion of starting differential pressure is realized, it is simple, convenient, quick.
Key 13 is equipped with the through slot 16 that may be stuck on convex ribs 9.Convex ribs 9 allow key 13 in pipe in through slot 16
It can only slide axially and can not rotate in body 1, it is ensured that top 14 withstands on the inclined-plane of the end face 10 of annular convex platform 7 always
On.
It is arranged to be threadedly coupled between tube body 1 and end face 2.By rotating tubular body 1 and end face 2, adjustable end face 2 and work
The distance between dynamic adjustable column 6, same adjustable starting differential pressure, end face 2 is with activity adjustment column 6 apart from long-range, starting differential pressure
Smaller, apart from remote small, starting differential pressure is bigger for end face 2 and activity adjustment column 6.
Convex ribs 9 withstand on each different 8 bottom of sliding slot, can determine that activity adjustment column 6 is each apart from position to air inlet 3
It sets.Since there is errors for the elastic force of adjustment spring 5, coefficient of elasticity and compressed length, it is easy to cause starting differential pressure not
Unanimously.Therefore by adjusting screw thread between tube body 1 and end face 2, in conjunction with the cooperation between convex ribs 9 and each different sliding slot 8,
It can reach any desired starting differential pressure.
1 tail portion of tube body is equipped with stopper 17, and key 13 can be blocked in the tail portion of tube body 1 by stopper 17.Key 13 and activity are adjusted
Reset spring 18 is equipped between segmented column 6.Reset spring 18 can make key 13 keep bouncing and exposing in the tail portion that tube body 1 goes out.It presses
Key 13 is equipped with gas vent 19, and activity adjustment column 6 is equipped with the channel 20 that can be vented, convenient for smooth by the gas of air inlet 3
Ground discharge.The gas for of course passing through air inlet 3 can also gap between activity adjustment column 6 and 13 periphery of key and tube body 1
Centre discharge.
Claims (10)
1. a kind of Non-return air valve includes tube body (1), the end face (2) of the tube body (1) is equipped with air inlet (3), described
Spool (4) and adjustment spring (5) are equipped in tube body (1), it is characterized in that activity adjustment column (6) are equipped in the tube body (1), institute
The activity adjustment column (6) stated can be axially moved in the circular cavity of tube body (1), and the adjustment spring (5) is arranged in spool
(4) between activity adjustment column (6), make spool (4) that closure air inlet (3), the activity adjustment on end face (2) can be withstood on
Column (6) side wall is equipped with annular convex platform (7), and the annular convex platform (7) is equipped with the sliding slot (8) opened up forward from rear end, institute
The sliding slot (8) at least two stated, and the depth of adjacent sliding slot (8) its slot successively differs certain height, the tube body
(1) inner wall is equipped with convex ribs (9), and the convex ribs (9) may be stuck in sliding slot (8), makes activity adjustment column (6) can be in tube body
(1) longitudinal movement in, until being detached from convex ribs (9).
2. Non-return air valve according to claim 1, it is characterized in that tube body (1) inner sidewall is equipped at least two
The convex ribs (9) of even distribution, the annular convex platform (7) are equipped with the sliding slot (8) of the corresponding distribution of at least two groups.
3. Non-return air valve according to claim 1, it is characterized in that between adjacent sliding slot (8) position annular convex platform (7)
End face (10) be arranged to inclined-plane.
4. Non-return air valve according to claim 2, it is characterized in that between adjacent sliding slot (8) position annular convex platform (7)
End face (10) be arranged to inclined-plane.
5. Non-return air valve according to claim 1,2,3 or 4, it is characterized in that the bottom surface (11) of sliding slot described in phase (8) is set
It is set to inclined-plane.
6. Non-return air valve according to claim 1,2,3 or 4, it is characterized in that the top surface (12) of the convex ribs (9) is arranged
At inclined-plane.
7. Non-return air valve according to claim 1,2,3 or 4, it is characterized in that being equipped in the tube body (1) axially to transport
Key (13) dynamic and that activity adjustment column (6) can be touched.
8. Non-return air valve according to claim 7, it is characterized in that the key (13) is equipped with top (14), it is described
Top (14) is equipped with the inclined-plane that can be pasted on top to the end face (10) of annular convex platform (7).
9. Non-return air valve according to claim 8 may be stuck on convex ribs (9) it is characterized in that the key (13) is equipped with
Through slot (16).
10. Non-return air valve according to claim 1,2,3 or 4, it is characterized in that between the tube body (1) and end face (2)
It is arranged to be threadedly coupled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811071922.6A CN109027346A (en) | 2018-09-14 | 2018-09-14 | Non-return air valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811071922.6A CN109027346A (en) | 2018-09-14 | 2018-09-14 | Non-return air valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109027346A true CN109027346A (en) | 2018-12-18 |
Family
ID=64621417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811071922.6A Pending CN109027346A (en) | 2018-09-14 | 2018-09-14 | Non-return air valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109027346A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112728169A (en) * | 2020-12-16 | 2021-04-30 | 陈忠菊 | Check valve with adjusting function |
| CN113719639A (en) * | 2020-05-26 | 2021-11-30 | 苏州旭创科技有限公司 | Pipeline switching device |
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| CN103285537A (en) * | 2013-05-22 | 2013-09-11 | 上海宝亚安全装备有限公司 | Inhalation valve and breathing mask both with function of switching ambient air and air-bottle air |
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| CN206398142U (en) * | 2017-01-19 | 2017-08-11 | 宁波市镇海翔鹏旅游休闲用品有限公司 | One kind point pressure type rapid translating air valve |
| CN107514470A (en) * | 2017-09-27 | 2017-12-26 | 福建欣宇卫浴科技股份有限公司 | A kind of button switches flow controller |
| CN207302946U (en) * | 2017-10-17 | 2018-05-01 | 浙江佳龙电子有限公司 | Self-locking rotary switchs |
| CN209511200U (en) * | 2018-09-14 | 2019-10-18 | 彭灿 | Non-return air valve |
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| US5141024A (en) * | 1989-02-01 | 1992-08-25 | Intersurgical Limited | Valve with paired helical ramps |
| CN201621340U (en) * | 2010-01-22 | 2010-11-03 | 普鲁卡姆电器（上海）有限公司 | Pressure maintaining valve capable of rapidly adjusting output pressure |
| US20130239570A1 (en) * | 2012-03-19 | 2013-09-19 | William E. Woollenweber | Boost pressure control system for turbocharged internal combustion engines |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113719639A (en) * | 2020-05-26 | 2021-11-30 | 苏州旭创科技有限公司 | Pipeline switching device |
| CN113719639B (en) * | 2020-05-26 | 2024-05-17 | 苏州旭创科技有限公司 | Pipeline switching device |
| CN112728169A (en) * | 2020-12-16 | 2021-04-30 | 陈忠菊 | Check valve with adjusting function |
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