CN106321910A - Purge valve - Google Patents
Purge valve Download PDFInfo
- Publication number
- CN106321910A CN106321910A CN201610677530.9A CN201610677530A CN106321910A CN 106321910 A CN106321910 A CN 106321910A CN 201610677530 A CN201610677530 A CN 201610677530A CN 106321910 A CN106321910 A CN 106321910A
- Authority
- CN
- China
- Prior art keywords
- valve
- end cap
- flap
- blow down
- valve body
- 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.)
- Granted
Links
- 238000010926 purge Methods 0.000 title abstract description 14
- 238000007789 sealing Methods 0.000 claims abstract description 42
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 abstract description 30
- 239000012530 fluid Substances 0.000 abstract description 13
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 15
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 11
- 229910017604 nitric acid Inorganic materials 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 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
- F16K15/00—Check valves
- F16K15/18—Check valves with actuating mechanism; Combined check valves and actuated valves
- F16K15/184—Combined check valves and actuated valves
- F16K15/1848—Check valves combined with valves having a rotating tap or cock
-
- 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
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/08—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks
- F16K11/087—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks with spherical plug
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
- Multiple-Way Valves (AREA)
Abstract
The invention relates to a purge valve. The purge valve comprises a valve body, a valve cover, a valve ball, a valve seat, a valve rod and end covers. The valve cover enables the valve ball to be installed inside the valve body in a sealing mode. The valve rod penetrates through the valve cover, one end of the valve rod is connected with the valve ball located inside the valve body, and the other end of the valve rod is located outside the valve body. The valve seat is arranged between the valve ball and the valve body. No-return sealing structures are arranged in at least one end cover, and multiple sealing structures are arranged between the valve cover and the valve seat and between the valve cover and the valve body. According to the purge valve, due to the fact that the no-return sealing structures are arranged at the ends, connected with ammonium nitrate system pipelines, of the purge valve, the phenomenon that ammonium nitrate flows into the valve body to corrode the valve body or other pipelines is avoided; and due to the fact that the multiple sealing structures are arranged between the first valve cover and the valve seat and between the valve seat and the valve body, the multiple grading sealing structures can ensure that the service life of the purge valve is longer, and the sealing performance is more reliable. In addition, the first end cover can be independently used, fluid in the ammonium nitrate system pipelines can be prevented from leaking, and repair and maintenance of other parts of the purge valve are facilitated.
Description
Technical field
The present invention relates to the switching valve used in the chemical industries such as ammonium nitrate, particularly a kind of blow down valve.
Background technology
During ammonium nitrate produces, need after Ammonium Nitrate system-down tubing is carried out purge vapor
Pigging, often shuts down once, it is necessary to purging pigging once, its process system as shown in Figure 1:
I: after the ammonium nitrate production line of left end is shut down, its production technology is as follows:
1, after acid ammonium pipeline pressure reduces to zero, sub-fraction nitric acid medium in pipeline, is also remained.
2, the A port of three-way valve 1 connects with B port, D port shutdown；B, C port intercommunication of two-way valve 2, is in two-way
The steam of the C port of ball valve 2 enters the ammonium nitrate pipeline of left end by B, A pipe and purges ammonium nitrate pipeline, removes nitre
The nitric acid of residual in acid ammonium system.
3, after lasting 7～10 minutes to be purged, three-way valve 1 and two-way valve 2 90-degree rotation counterclockwise, B, D of three-way valve 1
Port intercommunication, A port shutdown；B, C port shutdown of two-way valve 2, the steam of the C port being in two-way valve 2 is blocked in
The right-hand member of two-way valve 2, waits that ammonium nitrate production system boot runs.
II: after the ammonium nitrate production line of left end is started shooting and run, its production technology is as follows:
1, ammonium nitrate end pipeline pressure is slowly increased to 0.95MPa, is full of nitric acid in pipeline.
2, B, D port intercommunication of now three-way valve 1, A port shutdown, manufacturing technique requirent three-way valve 1 must intercept nitric acid
And make nitric acid can not enter B, C, D pipeline, prevent nitric acid corrosion B, C, D pipeline and two-way valve 2, thus protect B, D and C end
Steam pipe system.
In above process, three-way valve 1 has needed as shown in Figure 2, handoff procedure:
When three-way valve 1 is in the first station 1a, the ammonium nitrate system boot being in this valve A end runs, and pressure rises to
0.95MPa, nitric acid temperature 160 DEG C.Three-way valve 1 is closed.The spheroid of three-way valve 1 must stop the fluid media (medium) of A end
Enter the valve pocket of three-way valve 1.B port waits that in (Fig. 1), the steam of two-way valve 2 right-hand member enters.
When 1b, ammonium nitrate system-down, pressure drops to zero, remains part nitric acid in ammonium nitrate system pipeline.'s
Two-way valve 2 performs opening program, and steam enters three-way valve 1 by two-way valve 2.Steam passes through the B port shown in upper left figure
Enter, outwards discharge through D port.
When 1c, three-way valve 1 receives unlatching signal, and the spheroid of three-way valve 1 rotates counterclockwise, three-way valve D port arrange
The steam released is increasingly turned to three-way valve A port and discharges, and carries out the nitric acid being deposited in this valve A end pipeline purging pigging.
Three-way valve 1 is when the second station 1d, and after spheroid 90-degree rotation, three-way valve 1 is in the standard-sized sheet position steam nitric acid to A end
After ammonium systems stay purges the time of 7～10 minutes.Wait that three-way valve 1 performs bolt down procedure.When shutdown signal received by three-way valve 1
Time, the spheroid of three-way valve 1 rotates clockwise, the A port of three-way valve 1 steam given off is increasingly turned to D port and discharges.Two-way
Ball valve 2 performs bolt down procedure, and steam is blocked in the right-hand member of two-way valve 2, and three-way valve 1 returns to the first station 1a state, waits
Recursion instruction next time.
But, plain triple valve seals structure can not meet the process requirements in Process of Ammonium Nitrate Production.
Summary of the invention
In view of this, it is an object of the invention to provide a kind of blow down valve, to solve technical problem of the prior art.
The present invention provides a kind of blow down valve, and including valve body, valve gap, valve ball, valve seat, valve rod and end cap, described valve gap is by institute
Stating valve ball and be encapsulated into described valve inner, described valve rod passes described valve gap, and one end connects with the described valve ball of described valve inner
Connecing, the other end is positioned at outside described valve body, and described valve seat is arranged between described valve ball and end cap, at least one described end cap
It is provided with check sealing and is provided with multi-sealing structure between structure, and described valve gap and valve seat and valve body.
Preferably, described check sealing structure includes that the flap, guide pad, spring and first that are arranged in described end cap are close
Seal, described flap is movably disposed at described cover internal, and the movement of described flap is play the guiding role by described guide pad,
Described spring provides pretightning force to be pressed on by described flap on described end cap inwall, and described first sealing ring is arranged on described flap
And between end cap.
Preferably, described flap includes flap main body and guide post, and the first end of described guide post is connected to described flap
In main body, the second end is free end.
Preferably, described flap main body is bench-type structure, and described guide post is connected to the end that described flap area is less.
Preferably, described flap main body is located close to one end of described valve body, and described guide post is located remotely from described valve body
One end.
Preferably, also include that trim ring, described trim ring are arranged between described valve seat and end cap, described valve seat and described trim ring
Between be provided with sealing ring.
Preferably, it is provided with spring washer between described end cap and described trim ring.
Preferably, described multi-sealing structure includes the sealing ring between described trim ring and valve seat and valve seat and valve body, end
Sealing ring between lid and valve body.
Preferably, described valve rod is upper dress formula structure.
The blow down valve that the present invention provides arranges check and seals structure in the port being connected with ammonium nitrate system pipeline, prevents
Valve body or other pipelines are caused corrosion in flowing into valve body by ammonium nitrate, and set between the first valve gap and valve seat and valve seat and valve body
Put multi-sealing structure, further ensure the sealing of blow down valve.Multiple classification seals structure and can guarantee that the use of blow down valve
Life-span is longer, and sealing property is relatively reliable.And first end cap can also be used alone, the fluid in ammonium nitrate system pipeline can be prevented
Leakage, facilitates maintenance and the maintenance of other parts of blow down valve.
Accompanying drawing explanation
By description to the embodiment of the present invention referring to the drawings, above-mentioned and other purposes of the present invention, feature and
Advantage will be apparent from, in the accompanying drawings:
Fig. 1 is purging process schematic diagram in ammonium nitrate production；
Fig. 2 is that three-way valve switches work step schematic diagram；
Fig. 3 is blow down valve internal structure schematic diagram of the present invention；
Fig. 4 is generalized section at P-P in blow down valve Fig. 3 when the first station；
Fig. 5 is generalized section at P-P in blow down valve Fig. 3 when the second station；
Fig. 6 is valve flap structure schematic diagram.
Detailed description of the invention
It is more fully described various embodiments of the present invention hereinafter with reference to accompanying drawing.In various figures, identical element
Same or similar reference is used to represent.For the sake of clarity, the various piece in accompanying drawing is not necessarily to scale.
Fig. 3 is blow down valve internal structure schematic diagram of the present invention.
As it is shown on figure 3, the present invention provide blow down valve 100, including valve body 110, valve gap 120, valve ball 130, valve rod 140,
Executor 150 and end cap, it is internal that described valve ball 130 is encapsulated into described valve body 110 by described valve gap 120, and described valve rod 140 passes
Described valve gap 120, one end is connected with the described valve ball 130 within described valve body 110, outside the other end and described valve body 110
Described executor 150 connects, it is preferable that described valve rod 140 is upper dress formula structure.Described executor 150 can pass through described valve rod
140 control described valve balls 130 rotates, and switches open and-shut mode realizing described blow down valve 100, it is preferable that described executor 150 is
Single-action pneumatic executor.
Fig. 4,5 it is respectively blow down valve 100 generalized section at P-P in Fig. 3 when the first station and the second station.
As shown in Fig. 3,4,5, described end cap is provided with four, respectively first end cap the 160, second end cap the 161, the 3rd end
Lid 162 and the 4th end cap 163 (Fig. 4,5 shown in), described valve body 110 is provided with three ports, described first end cap 160, the
Two end caps 161 and the 3rd end cap 162 are separately positioned on three ports, and described 4th end cap 163 is the end cap closed, the company of fixing
Receive on described valve body 110.
Described first end cap 160 is for being connected with ammonium nitrate production spool road, in order to prevent nitric acid in ammonium nitrate production line
Enter jet chimney causes corrosion, described first end cap 160 to possess backflow preventing structure, make described first end cap to tubing
At 160, fluid can only realize one-way flow.
As it is shown on figure 3, described first end cap 160 has been internally formed cavity 1601, described cavity 1601 is along described first
Two ends on end cap 160 is axial are provided with the opening of connection.Described cavity 1601 is internally provided with check and seals structure, i.e. stops
The sealing structure that fluid inversely circulates, described check seals structure and includes flap 1602, guide pad 1603, spring 1604 and first
Sealing ring 1605, as shown in Figure 6, described flap 1602 includes flap main body 1602a and guide post 1602b, described flap main body
1602a is bench-type structure, preferably circular platform type structure, and one end of described guide post 1602b is connected to described flap main body 1602a
The end that area is less, second end of described guide post 1602b is free end, and described flap 1602 can be in described cavity 1601
Along moving axially of described first end cap 160.Described flap main body 1602a is located close to the part within described valve body 110, and
Its end area is more than described first end cap 160 aperture area in this place.Described first end cap 160 is away from described valve body 110
The opening at place is provided with guide pad 1603, and second end of described guide post 1602b can slide in described guide pad 1603, and institute
Stating and be set with spring 1604 on guide post 1602b, described flap main body 1602a is pressed on described cavity by described spring 1604
161 on the opening part inwall of described valve body 110, and edge of opening is provided with the first sealing ring 1605, described first close
Seal 1605 contacts with described flap main body 1602a, and provides pretightning force by described spring 1604, it is ensured that this opening part close
Feng Xing.
Further, the sealing of the check on described first end cap 160 structure also can use separately as check-valves, i.e. when
When described other parts of blow down valve 100 break down, only retain in described first end cap 160 can ensure ammonium nitrate system pipeline
Fluid will not leak, and carries out keeping in repair after other partial dismantling of described blow down valve 100.
Valve seat 170, described valve seat 170 and described valve ball it is provided with between described first end cap 160 and described valve ball 130
Sealing ring is set between 130.In order to prevent leaking, at described valve seat between described first end cap 160 and described valve seat 170
It is provided with trim ring 180 between 170 and described first end cap 160, is provided with between described trim ring 180 and described first end cap 160
Spring washer 190, arranges sealing ring between described trim ring 180 and described valve seat 170, described trim ring 180 is at described spring washer
It is pressed under the active force of 190 on described valve seat 170, and is in close contact, with sealing ring, the sealing ensured at this.
Further, after described check sealing structure leaks, described valve seat 170 can bear the thrust of fluid,
Described valve seat 170 is made to be pressed on described valve ball 130 under the active force of fluid thrust and spring washer 190, and fluid pressure
The biggest sealing is the best,
Its computing formula is: F=P A,
F: thrust, unit (N)；
P: fluid pressure, unit (MPa)；
A: area, unit: mm2；
A=(M2-N2)·π/4
Seal diameter between M: valve seat 170 outer shroud and valve body 110, unit (mm)
Sealing surface central diameter at N: valve seat 170 and valve ball 130 sealing ring, unit (mm)
Further, in order to prevent fluid from escaping to outside described blow down valve 100, at described first end cap 160 and described valve
Between body 110, between described valve seat 170 and described valve body 110 and between described second end cap 161 and described valve body 110, the 3rd
Between end cap 162 and described valve body 110 and between described 4th end cap 163 and valve body 110, described valve gap 120 and described valve body
It is provided with sealing ring between 110 and between described valve gap 120 and described valve rod 140.
Described first end cap 160 is connected with ammonium nitrate system pipeline, and described second end cap 161 is connected with steam pipework, institute
State the 3rd end cap 162 to be connected with air vent, as shown in Figure 4, when ammonium nitrate system boot runs, at described first end cap 160
Pressure be 0.95MPa, described valve ball 130 is in the first station, will steam pipework and air vent turn on, described blow down valve
100 are closed.
Now, the described flap 1602 in described first end cap 160, under the effect of spring 1604 and fluid pressure, compresses
On described first sealing ring 1605, make fluid can not enter described valve body 110 internal.
As it is shown in figure 5, ammonium nitrate system stalls, the pressure at described first end cap 160 drops to 0, described valve ball
130 rotate so that it is being in the second station, i.e. ammonium nitrate system pipeline and turn on steam pipework, steam is by described second end cap 161
It is internal that place flows into described valve body 110, and when flowing at described flap 1602, described flap 1602 is pushed open by steam, enables steam
Flow out through the cavity 1601 of described first end cap 160, and ammonium nitrate system pipeline is purged.
After having purged, described valve ball 130 turns to the first station again, waits the instruction of purge operations next time.
The blow down valve 100 that the present invention provides arranges check and seals structure in the port being connected with ammonium nitrate system pipeline,
Prevent from ammonium nitrate from flowing in valve body 110 valve body 110 or other pipelines are caused corrosion, and at the first valve gap 160 and valve seat 170 and
Between valve seat 170 and valve body 110, multi-sealing structure is set, further ensures the sealing of blow down valve 100.
It should be noted that, in this article, the relational terms of such as first and second or the like is used merely to a reality
Body or operation separate with another entity or operating space, and deposit between not necessarily requiring or imply these entities or operating
Relation or order in any this reality.And, term " includes ", " comprising " or its any other variant are intended to
Comprising of nonexcludability, so that include that the process of a series of key element, method, article or equipment not only include that those are wanted
Element, but also include other key elements being not expressly set out, or also include for this process, method, article or equipment
Intrinsic key element.In the case of there is no more restriction, statement " including ... " key element limited, it is not excluded that
Including process, method, article or the equipment of described key element there is also other identical element.
It is last that it is noted that obviously above-described embodiment is only for clearly demonstrating example of the present invention, and also
The non-restriction to embodiment.For those of ordinary skill in the field, can also do on the basis of the above description
Go out change or the variation of other multi-form.Here without also cannot all of embodiment be given exhaustive.And thus drawn
What Shen went out obviously changes or changes among still in protection scope of the present invention.
Claims (9)
1. a blow down valve, including valve body, valve gap, valve ball, valve seat, valve rod and end cap, described valve ball is encapsulated into by described valve gap
Described valve inner, described valve rod passes described valve gap, and one end is connected with the described valve ball of described valve inner, and the other end is positioned at
Outside described valve body, described valve seat is arranged between described valve ball and end cap, it is characterised in that set at least one described end cap
It is equipped with check sealing and is provided with multi-sealing structure between structure, and described valve gap and valve seat and valve body.
Blow down valve the most according to claim 1, it is characterised in that described check seals structure and includes being arranged on described end cap
Interior flap, guide pad, spring and the first sealing ring, described flap is movably disposed at described cover internal, described guiding
The movement of described flap is play the guiding role by block, and described spring provides pretightning force that described flap is pressed on described end cap inwall
On, described first sealing ring is arranged between described flap and end cap.
Blow down valve the most according to claim 2, it is characterised in that described flap includes flap main body and guide post, described
First end of guide post is connected in described flap main body, and the second end is free end.
Blow down valve the most according to claim 3, it is characterised in that described flap main body is bench-type structure, described guide post
It is connected to the end that described flap area is less.
Blow down valve the most according to claim 4, it is characterised in that described flap main body is located close to the one of described valve body
End, described guide post is located remotely from one end of described valve body.
Blow down valve the most according to claim 1, it is characterised in that also include that trim ring, described trim ring are arranged on described valve seat
And between end cap, between described valve seat and described trim ring, it is provided with sealing ring.
Blow down valve the most according to claim 6, it is characterised in that be provided with spring pad between described end cap and described trim ring
Circle.
Blow down valve the most according to claim 7, it is characterised in that described multi-sealing structure includes described trim ring and valve seat
Between sealing ring and valve seat and valve body, end cap and valve body between sealing ring.
9. according to the blow down valve described in any one of claim 1～8, it is characterised in that described valve rod is upper dress formula structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610677530.9A CN106321910B (en) | 2016-08-16 | 2016-08-16 | Purging valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610677530.9A CN106321910B (en) | 2016-08-16 | 2016-08-16 | Purging valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106321910A true CN106321910A (en) | 2017-01-11 |
| CN106321910B CN106321910B (en) | 2020-02-28 |
Family
ID=57740623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610677530.9A Expired - Fee Related CN106321910B (en) | 2016-08-16 | 2016-08-16 | Purging valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106321910B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108547973A (en) * | 2018-07-09 | 2018-09-18 | 长春燃气热力设计研究院有限责任公司 | A kind of logical spherical ball valve of two valve three-dimensionals |
| CN113375048A (en) * | 2021-04-23 | 2021-09-10 | 北京环宇京辉京城气体科技有限公司 | Hydrogen-returning device for hydrogen production by natural gas and hydrogen-returning process using same |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2233739A (en) * | 1989-07-04 | 1991-01-16 | Caleffi Spa | Ball valve incorporating double check valve |
| JPH0942489A (en) * | 1995-07-24 | 1997-02-14 | Kitz Corp | Ball valve having check valve |
| CN2283762Y (en) * | 1996-03-19 | 1998-06-10 | 株式会社庆东Boiler | One-way ball valve device |
| CN201391633Y (en) * | 2009-04-21 | 2010-01-27 | 宁波埃美柯铜阀门有限公司 | Non-return structure ball valve |
| CN203272899U (en) * | 2013-05-31 | 2013-11-06 | 浙江万盛机械有限公司 | Ball check valve |
| CN203703265U (en) * | 2014-01-02 | 2014-07-09 | 温州职业技术学院 | Ball valve with check function |
| CN203963102U (en) * | 2014-07-23 | 2014-11-26 | 自贡自高阀门有限公司 | A kind of T-shaped threeway fixing ball valve |
| CN204153200U (en) * | 2014-09-20 | 2015-02-11 | 宁波埃美柯铜阀门有限公司 | Static equilibrium regulates ball valve |
-
2016
- 2016-08-16 CN CN201610677530.9A patent/CN106321910B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2233739A (en) * | 1989-07-04 | 1991-01-16 | Caleffi Spa | Ball valve incorporating double check valve |
| JPH0942489A (en) * | 1995-07-24 | 1997-02-14 | Kitz Corp | Ball valve having check valve |
| CN2283762Y (en) * | 1996-03-19 | 1998-06-10 | 株式会社庆东Boiler | One-way ball valve device |
| CN201391633Y (en) * | 2009-04-21 | 2010-01-27 | 宁波埃美柯铜阀门有限公司 | Non-return structure ball valve |
| CN203272899U (en) * | 2013-05-31 | 2013-11-06 | 浙江万盛机械有限公司 | Ball check valve |
| CN203703265U (en) * | 2014-01-02 | 2014-07-09 | 温州职业技术学院 | Ball valve with check function |
| CN203963102U (en) * | 2014-07-23 | 2014-11-26 | 自贡自高阀门有限公司 | A kind of T-shaped threeway fixing ball valve |
| CN204153200U (en) * | 2014-09-20 | 2015-02-11 | 宁波埃美柯铜阀门有限公司 | Static equilibrium regulates ball valve |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108547973A (en) * | 2018-07-09 | 2018-09-18 | 长春燃气热力设计研究院有限责任公司 | A kind of logical spherical ball valve of two valve three-dimensionals |
| CN108547973B (en) * | 2018-07-09 | 2023-10-10 | 长春燃气热力设计研究院有限责任公司 | Two-flap three-way ball valve |
| CN113375048A (en) * | 2021-04-23 | 2021-09-10 | 北京环宇京辉京城气体科技有限公司 | Hydrogen-returning device for hydrogen production by natural gas and hydrogen-returning process using same |
| CN113375048B (en) * | 2021-04-23 | 2023-01-10 | 北京环宇京辉京城气体科技有限公司 | Hydrogen-returning device for hydrogen production by natural gas and hydrogen-returning process using same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106321910B (en) | 2020-02-28 |
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Effective date of registration: 20200624 Address after: 056000 Lintan Industrial Park, Jinnan New District, Handan City, Hebei Province (Lintan Town Fan Village) Patentee after: Hebei Raymond Valve Manufacturing Co.,Ltd. Address before: 101500 Beijing Miyun City Economic Development Zone C Yan Road No. 9-1 Patentee before: RAYMOND (BEIJING) TECHNOLOGY Co.,Ltd. |
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