CN108758039A - A kind of vacuum drain valve and toilet feces collecting system of unilateral side row pressure - Google Patents
A kind of vacuum drain valve and toilet feces collecting system of unilateral side row pressure Download PDFInfo
- Publication number
- CN108758039A CN108758039A CN201810997426.7A CN201810997426A CN108758039A CN 108758039 A CN108758039 A CN 108758039A CN 201810997426 A CN201810997426 A CN 201810997426A CN 108758039 A CN108758039 A CN 108758039A
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- China
- Prior art keywords
- vacuum
- valve
- drain valve
- spacing body
- row pressure
- 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
Links
- 210000003608 fece Anatomy 0.000 title claims abstract description 8
- 239000010865 sewage Substances 0.000 claims abstract description 16
- 230000006835 compression Effects 0.000 claims description 38
- 238000007906 compression Methods 0.000 claims description 38
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 3
- 230000029142 excretion Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000011010 flushing procedure Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000009428 plumbing Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229920002943 EPDM rubber Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
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
- F16K17/0446—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 an obturating member having at least a component of their opening and closing motion not perpendicular to the closing faces
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sanitary Device For Flush Toilet (AREA)
- Self-Closing Valves And Venting Or Aerating Valves (AREA)
Abstract
The invention discloses a kind of vacuum drain valves and toilet feces collecting system of unilateral row pressure, it solves the problems, such as that excretion valve arrangement is complex, vacuum degree variation required time is longer, spacing body opening and closing speed is slower in the prior art, simplify existing vacuum drain valve structure, part die sinking manufacturing expense and maintenance difficulty are reduced, while improving the opening and closing rate of vacuum spacing body；Its technical solution is：Including valve body, body top has chamber by end cap seal, valve inner；The vacuum spacing body for separating valve body dirt inlet and sewage draining exit is equipped in the chamber；Telescopic device is equipped with above vacuum spacing body, telescopic device makes to close between dirt inlet and sewage draining exit to vacuum spacing body single-side pressurization or telescopic device rebound makes to be connected between dirt inlet and sewage draining exit.
Description
Technical field
The present invention relates to the vacuum drain valves and toilet defecate collection system of bleed valve field more particularly to a kind of unilateral row pressure
System.
Background technology
Bleed valve is one of the important composition parts of the toilets such as train feces collecting system.As control of sewage disposal passage switching
Core, the quality of bleed valve quality and performance is directly related to train toilet system blowdown stability and entire train space
Spatter property.After dirt-collecting, scattered overflow of stink can pollute use space, this is an important drawback of dirt-collecting.Row
The application of valve is let out then while realizing that dirt discharges in time, stink has been effectively relieved and has dissipated excessive problem.It leads at present to be applied
Bleed valve form has：Plate valve, moushroom valve and vacuum drain valve.Plate valve, moushroom valve are all that the opening and closing for realizing valve is pushed using cylinder, valve
Plate is easy to wear, and is easy to form dirt and gather, and cleaning is difficult, and spoilage is very high.And vacuum drain valve rapid, damage with its opening and closing
The low advantage of rate is using more and more extensive.
China Patent Publication No. CN101349070, provides a kind of vacuum drain valve, and CN202274134U provides a kind of defecate collection
The excretion valve gear of device system application, the two propose two kinds of common bleed valve forms.Its major technique type is for valve body
One larger cylindrical structure, inside superscribes, pressing member and guide rod keep upper and lower casting die same by the variation of vacuum degree in valve body
Shi Zuoyong squeezes rubber spacing body, the unlatching of control valve.The excretion valve arrangement is complex, and included part is more, complicated,
It is high to mold manufacturing expense, and it is big to damage maintenance difficulty；Simultaneously because body cavity is larger, the time required to vacuum degree variation relatively
It is long, it is slower to cause spacing body opening and closing speed；And initial tension of spring is fixed, open the change of vacuum degree and vacuum spacing body diameter compared with
For difficulty.
Invention content
For overcome the deficiencies in the prior art, the present invention provides a kind of vacuum drain valve of unilateral row pressure, simplification is existing
Vacuum drain valve structure reduces part die sinking manufacturing expense and maintenance difficulty, while improving the opening and closing rate of vacuum spacing body.
A kind of vacuum drain valve of unilateral side row pressure, including valve body, body top have chamber by end cap seal, valve inner
Room；The vacuum spacing body for separating valve body dirt inlet and sewage draining exit is equipped in the chamber；Flexible dress is equipped with above vacuum spacing body
It sets, telescopic device makes to close between dirt inlet and sewage draining exit to vacuum spacing body single-side pressurization or telescopic device rebound makes dirt inlet
It is connected between sewage draining exit.
Further, the cover internal is equipped with guide rod compatible with telescopic device, and vacuum suction is equipped at the top of end cap
Hole.
Further, the guide rod includes more elastic rods.
Further, the telescopic device includes compression bar, sleeve and spring, and the compression bar includes and the matched pressure of guide rod
Bar straight tube, compression bar straight tube outer sheath are equipped with sleeve and spring.
Further, it is connected at the top of the spring one end and sleeve, the spring other end is fixed and wrapped with end cap inside top
It is overlying on the outside of guide rod；
There is the first protrusion, the first protrusion to be contacted with vacuum spacing body for compression bar straight tube bottom.
Further, the body base is fixed with pedestal, and the base center position is equipped with boss, the boss surface
Equipped with the second protrusion.
Further, the valve body is tapered.
Further, vacuum spacing body outlet end is equipped with spacing body protrusion.
Further, it is sealed by diaphragm member between the end cap and valve body.
The present invention also provides a kind of toilet feces collecting systems, include the vacuum drain valve of above-mentioned unilateral row pressure.
Compared with prior art, the beneficial effects of the invention are as follows：
(1) two-sided compression vacuum spacing body is changed to single-side pressurization by the present invention, simplifies the structure of vacuum drain valve, shortens compression bar
Displacement distance is compressed, to reduce body cavity space；Die sinking and cost of manufacture is greatly saved, decrease assembling procedure and
Time improves working efficiency and overhaul efficiency；
(2) vacuum drain valve normality of the present invention is vacuum spacing body closed state, at this time in vacuum spacing body cavity and valve body cavity
Inside all with air communication, the two pressure is identical, and since spring is compressed, elastic force makes compression bar push vacuum spacing body, true to make
Empty spacing body is closed, and bleed valve is in closed state, and has been completely cut off dissipating for blow-off line foul smell and overflow；
(3) valve body of the invention is taper, reduces body cavity volume, thus in valve body vacuum degree generation and disappearance
It is all exceedingly fast, realizes the quick opening and closing of bleed valve, improve excretion efficiency；
(4) sleeve of the invention is placed between spring lower part and compression bar straight tube blind end, can be by changing length sleeve
Carry out the arbitrary initial compression length for changing spring, to make to open the diameter of vacuum degree and the vacuum spacing body in valve body certain
It can arbitrarily be converted in range, when remodeling only needs to expand valve body opening diameter and sleeve height, simple to save cost again；
(5) vacuum drain valve of the invention fully relies on the interference fit seal of vacuum spacing body and diaphragm member, it is no longer necessary to
Other sealing elements ensure the being completely closed property of body cavity while having saved production cost；Have among valve base one small
Protrusion, can realize secondary seal when vacuum spacing body is compacted, it is ensured that vacuum drain valve completely closes, No leakage.
Description of the drawings
The accompanying drawings which form a part of this application are used for providing further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation do not constitute the improper restriction to the application for explaining the application.
Fig. 1 is the longitudinal sectional view of the present invention；
Fig. 2 is the longitudinal sectional view of valve body of the present invention；
Fig. 3 is the vertical view of end cap of the present invention；
Fig. 4 is the A-A sectional views of end cap of the present invention；
Fig. 5 is the structural schematic diagram of compression bar of the present invention；
Fig. 6 is the A-A sectional views of compression bar of the present invention；
Fig. 7 is the scheme of installation of closed state of the present invention；
Fig. 8 is the scheme of installation of open state of the present invention；
Wherein, 1, vacuum drain valve, 2, end cap, 2-1, vacuum holes, 2-2, guide rod, 3, diaphragm member, 4, valve body, 4-1,
Boss, 4-2, the second protrusion, 5, compression bar, 5-1, compression bar straight tube, 5-2, the first protrusion, 6, spring, 7, sleeve, 8, dirt inlet, 9,
Sewage draining exit, 10, vacuum spacing body, 10-1, spacing body protrusion, 11, urinal, 12, solenoid valve, 13, flush port, 14, flushing switch, 15,
It washes by water valve module, 16, small check valve, 17, plumbing for waste water road, 18, blow-off line.
Specific implementation mode
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific implementation mode, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or combination thereof.
As background technology is introduced, exist in the prior art that excretion valve arrangement is complex, needed for vacuum degree variation
The deficiency that time is longer, spacing body opening and closing speed is slower, in order to solve technical problem as above, present applicant proposes a kind of unilateral rows
The vacuum drain valve and toilet feces collecting system of pressure.
In a kind of typical embodiment of the application, as shown in figs 1 to 6, a kind of vacuum row of unilateral row pressure is provided
Let out valve, including valve body 4, end cap 2, telescopic device, vacuum spacing body 10 and pedestal, 4 bottom mounting seat of valve body, 4 inside tool of valve body
There are chamber, cavity bottom one end to connect dirt inlet 8, the other end connects sewage draining exit 9；It is connected between chamber, dirt inlet, sewage draining exit true
Empty spacing body.
The size of 4 intracavity space of valve body directly affects the time for reaching and opening vacuum degree, to influence vacuum spacing body 10
Therefore valve body 4 it is tapered to be located at dirt inlet 8, the main part setting of the top of sewage draining exit 9, is subtracted by opening/closing time and working efficiency
Small 4 cavity volume of valve body improves the work of vacuum drain valve 1 to improve the speed that certain vacuum degree is realized and disappeared
Make efficiency.
10 outlet end entad of the vacuum spacing body is equipped with a spacing body protrusion 10-1 thickeied, is conducive to vacuum spacing body
10 contact areas when being compressed are smooth, leakproofness is good.
Telescopic device is equipped between the vacuum spacing body 10 and end cap 2.
The base upper surface center is equipped with equipped with the surfaces boss 4-1, the boss 4-1 and is matched with telescopic device
The second protrusion 4-2, the second protrusion 4-2 size be much smaller than boss 4-1；Second protrusion 4-2 can be stretched in vacuum spacing body 10
Compression apparatus realizes secondary seal when compressing, it is ensured that vacuum drain valve 1 completely closes, No leakage.
The end cap 2 is installed on 4 top of valve body, and diaphragm member 3 is equipped between end cap 2 and valve body 4, passes through end cap 2, diaphragm
Part 3 seals valve body 4.
2 top side of end cap is equipped with vacuum holes 2-1, and vacuum holes 2-1 is connect with vacuum ejector, for aspirating
Vacuum in valve body 4.
2 inner hub location of end cap is equipped with groove, and guide rod 2-2 is fixed in groove；The guide rod 2-2 includes four elasticity
Bar, elastic rod can be compressed or be sprung back.
The elastic rod is made of elastic material.
Preferably, the elastic rod is made of POM plastic.
The vacuum spacing body 10 and diaphragm member 3 are made of EPDM rubber material, and spring material is 304 stainless steels, other
Component is all made of POM plastic and is made
The telescopic device includes spring 6, compression bar 5 and sleeve 7, and compression bar 5 includes open top, the internal pressure with cavity
First protrusion 5-2 of bar straight tube 5-1 and the bottoms compression bar straight tube 5-1, the first protrusion 5-2 are contacted with vacuum spacing body 10；Inside end cap 2
Guide rod 2-2 can move up and down in compression bar straight tube 5-1 internal cavities.
There are two first protrusion 5-2, and the two is spaced a distance, and the position of the second protrusion 4-2 is first convex between two
Rise 5-2 between；Two first protrusion 5-2 push 10 top of vacuum spacing body, coordinate second be located at below vacuum spacing body 10 convex
4-2 is played, when compression bar 5, which pushes, closes vacuum spacing body 10, plays the effect of secondary seal.
The bottom lock end diameter of 5 straight tube of compression bar is more than its main body portion diameter, and the sleeve 7 is sheathed on compression bar straight tube 5-
1 outside and 7 bottom of sleeve and the blind end of compression bar straight tube 5-1 are fixed.
It is connected by spring 6 between the top of sleeve 7 and 2 interior grooves of end cap, the spring 6 is sheathed on guide rod 2-2, pressure
The outside of bar straight tube 5-1；Guide rod 2-2 can prevent 6 top of spring from deviating, and compression bar straight tube 5-1 can ensure in 6 telescopic process of spring
Smooth motion.
Spring 6 extends, and band moving sleeve 7 and compression bar 5 push, and vacuum spacing body 10 is made to be closed；Spring 6 bounces back, compression bar 5 and sleeve
7 rise therewith, and vacuum spacing body 10 is made to open.
By adjusting the height of sleeve 7 vacuum degree is opened come 6 initial compression length of arbitrary adjustment spring and vacuum drain valve 1
Size.
1 normality of the application vacuum drain valve is 10 closed state of vacuum spacing body, in 10 cavity of vacuum spacing body with 4 chamber of valve body
Inside all with air communication, the two pressure is identical, and since spring 6 is compressed, elastic force makes compression bar push vacuum spacing body 10, to make
Vacuum spacing body 10 is closed, and vacuum drain valve 1 is in closed state, and has been completely cut off dissipating for blow-off line foul smell and overflow.
In the another embodiment of the application, as shown in Figs. 7-8, a kind of toilet feces collecting system is provided, including
Vacuum drain valve 1 in the above embodiment, vacuum drain valve 1 are connected by plumbing for waste water road 17 with urinal 11, and urinal 11 is washed by water
Then controlled by bath valve module 15 and flushing switch 14；The sewage draining exit of vacuum drain valve 1 connects blow-off line 18, with dirt-collecting
Device is connected；Vacuum holes are connected by air valve with vacuum source, and the control closed by control module solenoid valve 12 is acted.
As shown in fig. 7, vacuum drain valve 1 is closed, bath valve module 15, vacuum source and air valve etc. are not all opened
It opens, body cavity air pressure identical as the inner cavity air pressure of vacuum spacing body is all atmospheric pressure, and compression bar is pushed by spring force, makes vacuum spacing body
It is compressed, inner wall tightly fits together, and two first protrusion of compression bar lower part and the second male cooperation of body base are formed dual close
Envelope, it is ensured that vacuum spacing body is closed good, and gas leakage drainage does not occur.
As shown in figure 8,1 open state of vacuum drain valve, flushing switch 14 is pressed at this time, and bath valve module 15 works,
Vacuum source starts, and air valve is opened, and body cavity air is pumped by vacuum holes, and air pressure declines, and forms certain vacuum degree,
The inside and outside certain pressure that formed of vacuum spacing body chamber is poor at this time, and the compression bullet for overcoming spring is combined with vacuum spacing body screen resilience itself
Power makes vacuum spacing body spring back, and inner cavity is opened, to be connected to dirt inlet and sewage draining exit.At this point, the vacuum due to blow-off line is made
With dirt is pumped by vacuum drain valve 1 in urinal 11, realizes the discharge of dirt.
Flushing period terminates, and vacuum source is closed, and for body cavity again with atmosphere, it is atmospheric pressure that air pressure, which is gone up rapidly,
Vacuum spacing body chamber internal and external pressure balance, due to generating rebound by compression, compression bar pushes, makes again in vacuum spacing body chamber spring
Wall is bonded by compression, and vacuum drain valve 1 is closed.
The foregoing is merely the preferred embodiments of the application, are not intended to limit this application, for the skill of this field
For art personnel, the application can have various modifications and variations.Within the spirit and principles of this application, any made by repair
Change, equivalent replacement, improvement etc., should be included within the protection domain of the application.
Claims (10)
1. a kind of vacuum drain valve of unilateral side row pressure, which is characterized in that including valve body, body top is by end cap seal, in valve body
Portion has chamber；The vacuum spacing body for separating valve body dirt inlet and sewage draining exit is equipped in the chamber；It is set above vacuum spacing body
There is telescopic device, telescopic device makes to close between dirt inlet and sewage draining exit to vacuum spacing body single-side pressurization or telescopic device is sprung back
Make to be connected between dirt inlet and sewage draining exit.
2. a kind of vacuum drain valve of unilateral row pressure according to claim 1, which is characterized in that the cover internal is equipped with
Guide rod compatible with telescopic device, end cap top are equipped with vacuum holes.
3. a kind of vacuum drain valve of unilateral row pressure according to claim 2, which is characterized in that the guide rod includes more
Elastic rod.
4. a kind of vacuum drain valve of unilateral row pressure according to claim 2, which is characterized in that the telescopic device includes
Compression bar, sleeve and spring, the compression bar include being equipped with sleeve and bullet with the matched compression bar straight tube of guide rod, compression bar straight tube outer sheath
Spring；
It is connected at the top of the spring one end and sleeve, the spring other end is fixed with end cap inside top and is coated on the outside of guide rod.
5. a kind of vacuum drain valve of unilateral row pressure according to claim 4, which is characterized in that compression bar straight tube bottom
With the first protrusion, the first protrusion is contacted with vacuum spacing body.
6. a kind of vacuum drain valve of unilateral row pressure according to claim 1, which is characterized in that the body base is fixed
There are pedestal, the base center position to be equipped with boss, the boss surface is equipped with the second protrusion.
7. a kind of vacuum drain valve of unilateral row pressure according to claim 1, which is characterized in that the valve body is tapered.
8. a kind of vacuum drain valve of unilateral row pressure according to claim 1, which is characterized in that the vacuum spacing body outlet
End is equipped with spacing body protrusion.
9. a kind of vacuum drain valve of unilateral row pressure according to claim 1, which is characterized in that the end cap and valve body it
Between sealed by diaphragm member.
10. a kind of toilet feces collecting system, which is characterized in that include the true of the unilateral row pressure as described in claim 1-9 is any
Empty bleed valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810997426.7A CN108758039A (en) | 2018-08-29 | 2018-08-29 | A kind of vacuum drain valve and toilet feces collecting system of unilateral side row pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810997426.7A CN108758039A (en) | 2018-08-29 | 2018-08-29 | A kind of vacuum drain valve and toilet feces collecting system of unilateral side row pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108758039A true CN108758039A (en) | 2018-11-06 |
Family
ID=63967564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810997426.7A Pending CN108758039A (en) | 2018-08-29 | 2018-08-29 | A kind of vacuum drain valve and toilet feces collecting system of unilateral side row pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108758039A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3984080A (en) * | 1973-11-12 | 1976-10-05 | Oy Wartsila Ab | Vacuum sewer valve |
| US4955582A (en) * | 1989-08-14 | 1990-09-11 | Baumann Hans D | Weirless diaphragm valve |
| DE19604163A1 (en) * | 1996-02-06 | 1997-08-07 | Harald Michael | Sealing valve for vacuum waste connection |
| CN103438237A (en) * | 2013-08-27 | 2013-12-11 | 宁波南车时代传感技术有限公司 | Suck-back-prevention vacuum blow-down valve and vacuum dirt collecting system |
| CN203703227U (en) * | 2013-11-07 | 2014-07-09 | 安徽金诚复合材料有限公司 | Eduction valve |
| CN104776244A (en) * | 2015-03-27 | 2015-07-15 | 浙江源态环保科技服务有限公司 | Vacuum pneumatic diaphragm valve |
| CN104806783A (en) * | 2015-03-03 | 2015-07-29 | 杭州聚川环保科技有限公司 | Fully-opened vacuum diaphragm valve |
| CN208793724U (en) * | 2018-08-29 | 2019-04-26 | 山东中车华腾环保科技有限公司 | A kind of vacuum drain valve and toilet feces collecting system of unilateral side row pressure |
-
2018
- 2018-08-29 CN CN201810997426.7A patent/CN108758039A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3984080A (en) * | 1973-11-12 | 1976-10-05 | Oy Wartsila Ab | Vacuum sewer valve |
| US4955582A (en) * | 1989-08-14 | 1990-09-11 | Baumann Hans D | Weirless diaphragm valve |
| DE19604163A1 (en) * | 1996-02-06 | 1997-08-07 | Harald Michael | Sealing valve for vacuum waste connection |
| CN103438237A (en) * | 2013-08-27 | 2013-12-11 | 宁波南车时代传感技术有限公司 | Suck-back-prevention vacuum blow-down valve and vacuum dirt collecting system |
| CN203703227U (en) * | 2013-11-07 | 2014-07-09 | 安徽金诚复合材料有限公司 | Eduction valve |
| CN104806783A (en) * | 2015-03-03 | 2015-07-29 | 杭州聚川环保科技有限公司 | Fully-opened vacuum diaphragm valve |
| CN104776244A (en) * | 2015-03-27 | 2015-07-15 | 浙江源态环保科技服务有限公司 | Vacuum pneumatic diaphragm valve |
| CN208793724U (en) * | 2018-08-29 | 2019-04-26 | 山东中车华腾环保科技有限公司 | A kind of vacuum drain valve and toilet feces collecting system of unilateral side row pressure |
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| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20230220 Address after: 215557 Zhengwen Road, Yushan High-tech Industrial Park, Changshu, Suzhou, Jiangsu Province Applicant after: Jiangsu CRRC Huateng Environmental Protection Technology Co.,Ltd. Address before: 250101 No. 3666 Century Avenue, Jinan High-tech Zone, Shandong Province Applicant before: SHANDONG CRRC HUATENG ENVIRONMENT Co.,Ltd. |
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Application publication date: 20181106 |
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