CN106321910B - Purging valve - Google Patents
Purging valve Download PDFInfo
- Publication number
- CN106321910B CN106321910B CN201610677530.9A CN201610677530A CN106321910B CN 106321910 B CN106321910 B CN 106321910B CN 201610677530 A CN201610677530 A CN 201610677530A CN 106321910 B CN106321910 B CN 106321910B
- Authority
- CN
- China
- Prior art keywords
- valve
- cover
- flap
- purge
- end cover
- 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
- 238000010926 purge Methods 0.000 title claims abstract description 42
- 238000007789 sealing Methods 0.000 claims abstract description 39
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000012530 fluid Substances 0.000 claims abstract description 17
- 238000003825 pressing Methods 0.000 claims description 12
- 230000036316 preload Effects 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000004806 packaging method and process Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 14
- 238000004519 manufacturing process Methods 0.000 description 12
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 10
- 229910017604 nitric acid Inorganic materials 0.000 description 10
- 238000010586 diagram Methods 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
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)
- Multiple-Way Valves (AREA)
- Lift Valve (AREA)
Abstract
The invention relates to a purge valve which comprises a valve body, a valve cover, a valve ball, a valve seat, a valve rod and end covers, wherein the valve cover is used for packaging the valve ball into the valve body, the valve rod penetrates through the valve cover, one end of the valve rod is connected with the valve ball in the valve body, the other end of the valve rod is positioned outside the valve body, the valve seat is arranged between the valve ball and the valve body, at least one end cover is internally provided with a non-return sealing structure, and multiple sealing structures are arranged between the valve cover, the valve seat and the valve body. The invention arranges the check sealing structure at the port connected with the ammonium nitrate system pipeline to prevent the ammonium nitrate from flowing into the valve body to corrode the valve body or other pipelines, and arranges the multiple sealing structures between the first valve cover and the valve seat and between the valve seat and the valve body, and the multiple grading sealing structure can ensure longer service life of the purge valve and more reliable sealing performance. And the first end cover can be used independently, so that fluid in the ammonium nitrate system pipeline can be prevented from leaking, and the maintenance of other parts of the purge valve is facilitated.
Description
Technical Field
The invention relates to a switching valve used in the chemical industry of ammonium nitrate and the like, in particular to a purge valve.
Background
In the process of producing ammonium nitrate, after the ammonium nitrate production process system is stopped, steam purging is needed to be carried out on a pipeline system, and the pipeline system must be purged once when the ammonium nitrate production process system is stopped, wherein the process system is shown as the attached drawing 1:
i: when the ammonium nitrate production line at the left end is stopped, the production process comprises the following steps:
1. after the pressure of the ammonium salt pipeline is reduced to zero, a small part of nitric acid medium is remained in the pipeline.
2. The port A of the three-way valve 1 is communicated with the port B, and the port D is closed; the B, C ports of the two-way ball valve 2 are communicated, and steam at the C port of the two-way ball valve 2 enters the ammonium nitrate pipeline at the left end through the B, A pipe and purges the ammonium nitrate pipeline to remove residual nitric acid in an ammonium nitrate system.
3. After purging lasts for 7-10 minutes, the three-way valve 1 and the two-way ball valve 2 rotate 90 degrees anticlockwise, B, D ports of the three-way valve 1 are communicated with each other, and an A port is closed; the B, C port of the two-way ball valve 2 is closed, and the steam at the C port of the two-way ball valve 2 is blocked at the right end of the two-way ball valve 2 to wait for the start-up operation of the ammonium nitrate production system.
II: when the ammonium nitrate production line at the left end is started to operate, the production process comprises the following steps:
1. the pressure of the pipeline at the ammonium nitrate end is slowly increased to 0.95MPa, and the pipeline is filled with nitric acid.
2. At the moment, B, D ports of the three-way valve 1 are communicated, an A port is closed, and the production process requires that the three-way valve 1 blocks nitric acid and prevents the nitric acid from entering a B, C, D pipeline, so that the nitric acid is prevented from corroding a B, C, D pipeline and the two-way ball valve 2, and a vapor pipeline system at the B, D end and the C end is protected.
In the above process, the three-way valve 1 needs to complete the switching process as shown in fig. 2:
when the three-way valve 1 is positioned at the first station 1a, the ammonium nitrate system positioned at the end A of the three-way valve is started to operate, the pressure is increased to 0.95MPa, and the temperature of nitric acid is 160 ℃. The three-way valve 1 is in a closed state. The ball of the three-way valve 1 must block the fluid medium at the a-end from entering the valve cavity of the three-way valve 1. The B port waits (fig. 1) for vapor to enter at the right end of the two-way ball valve 2.
And at 1b, stopping the ammonium nitrate system, reducing the pressure to zero, and leaving part of nitric acid in the ammonium nitrate system pipeline. The two-way ball valve 2 performs an opening sequence and steam enters the three-way valve 1 through the two-way ball valve 2. Vapor enters through the port B shown in the upper left and is discharged outwardly through the port D.
When 1c, the three-way valve 1 receives the opening signal, the sphere of the three-way valve 1 rotates anticlockwise, steam discharged from the port D of the three-way valve gradually turns to the port A of the three-way valve to be discharged, and the nitric acid deposited in the pipeline at the port A of the three-way valve is purged and cleaned.
When the three-way valve 1 is at the second station 1d, after the sphere rotates by 90 degrees, the three-way valve 1 is located at the full-open position and continuously purges the ammonium nitrate system at the A end for 7-10 minutes. Waiting for the three-way valve 1 to perform the closing procedure. When the three-way valve 1 receives a closing signal, the ball of the three-way valve 1 rotates clockwise, and the steam discharged from the port A of the three-way valve 1 is gradually diverted to the port D to be discharged. The two-way ball valve 2 executes a closing program, steam is blocked at the right end of the two-way ball valve 2, and the three-way valve 1 returns to the first station 1a state to wait for the next circulation command.
However, the sealing structure of the common three-way valve cannot meet the process requirements in the production process of ammonium nitrate.
Disclosure of Invention
In view of the above, the present invention provides a purge valve to solve the technical problems in the prior art.
The invention provides a purge valve which comprises a valve body, a valve cover, a valve ball, a valve seat, a valve rod and end covers, wherein the valve cover is used for packaging the valve ball into the valve body, the valve rod penetrates through the valve cover, one end of the valve rod is connected with the valve ball in the valve body, the other end of the valve rod is positioned outside the valve body, the valve seat is arranged between the valve ball and the end covers, at least one end cover is internally provided with a non-return sealing structure, and multiple sealing structures are arranged between the valve cover, the valve seat and the valve body.
Preferably, the check seal structure comprises a valve clack, a guide block, a spring and a first seal ring, wherein the valve clack is arranged in the end cover, the valve clack is movably arranged in the end cover, the guide block guides the movement of the valve clack, the spring provides pretightening force to press the valve clack onto the inner wall of the end cover, and the first seal ring is arranged between the valve clack and the end cover.
Preferably, the valve flap comprises a valve flap body and a guide rod, a first end of the guide rod is connected to the valve flap body, and a second end is a free end.
Preferably, the valve flap body is of a mesa structure, and the guide rod is connected to an end of the valve flap having a smaller area.
Preferably, the valve flap body is located at an end close to the valve body, and the guide rod is located at an end far from the valve body.
Preferably, the sealing device further comprises a pressing ring, the pressing ring is arranged between the valve seat and the end cover, and a sealing ring is arranged between the valve seat and the pressing ring.
Preferably, a spring washer is arranged between the end cover and the pressing ring.
Preferably, the multiple sealing structure comprises a sealing ring between the pressing ring and the valve seat and a sealing ring between the valve seat and the valve body and between the end cover and the valve body.
Preferably, the valve rod is of a top-loading structure.
The check sealing structure is arranged at the port of the purge valve connected with the ammonium nitrate system pipeline, so that the corrosion of the valve body or other pipelines caused by the inflow of ammonium nitrate into the valve body is prevented, and the multiple sealing structures are arranged between the first valve cover and the valve seat and between the valve seat and the valve body, so that the sealing property of the purge valve is further ensured. The multiple-stage sealing structure can ensure that the service life of the purge valve is longer and the sealing performance is more reliable. And the first end cover can be used independently, so that fluid in the ammonium nitrate system pipeline can be prevented from leaking, and the maintenance of other parts of the purge valve is facilitated.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a purging process in the production of ammonium nitrate;
FIG. 2 is a schematic diagram of the switching process of the three-way valve;
FIG. 3 is a schematic view of the internal structure of the purge valve of the present invention;
FIG. 4 is a schematic cross-sectional view taken at P-P of FIG. 3 with the purge valve in the first station;
FIG. 5 is a schematic cross-sectional view taken at P-P of FIG. 3 with the purge valve in the second station;
fig. 6 is a schematic diagram of the valve flap structure.
Detailed Description
Various embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Like elements in the various figures are denoted by the same or similar reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale.
FIG. 3 is a schematic view of the internal structure of the purge valve of the present invention.
As shown in fig. 3, the purge valve 100 of the present invention includes a valve body 110, a bonnet 120, a valve ball 130, a valve stem 140, an actuator 150, and an end cap, wherein the bonnet 120 encloses the valve ball 130 inside the valve body 110, the valve stem 140 passes through the bonnet 120, one end of the valve stem is connected to the valve ball 130 inside the valve body 110, and the other end of the valve stem 140 is connected to the actuator 150 outside the valve body 110, and preferably, the valve stem 140 is of a top-mounted structure. The actuator 150 can control the valve ball 130 to rotate through the valve rod 140 to realize the switching of the open and close states of the purge valve 100, and preferably, the actuator 150 is a single-acting pneumatic actuator.
Fig. 4 and 5 are schematic cross-sectional views P-P in fig. 3 of the purge valve 100 in the first and second stations, respectively.
As shown in fig. 3, 4 and 5, the end caps are four, that is, a first end cap 160, a second end cap 161, a third end cap 162 and a fourth end cap 163 (shown in fig. 4 and 5), the valve body 110 is provided with three ports, the first end cap 160, the second end cap 161 and the third end cap 162 are respectively disposed on the three ports, and the fourth end cap 163 is a closed end cap and is fixedly connected to the valve body 110.
The first end cover 160 is used for being connected with an ammonium nitrate production line pipeline, and in order to prevent nitric acid in an ammonium nitrate production line from entering a steam pipeline to corrode the pipeline system, the first end cover 160 is provided with a backflow prevention structure, so that fluid at the first end cover 160 can only realize one-way circulation.
As shown in fig. 3, a cavity 1601 is formed inside the first end cap 160, and the cavity 1601 is provided with openings communicating with both ends in the axial direction of the first end cap 160. The cavity 1601 is internally provided with a check seal structure, that is, a seal structure for preventing reverse flow of fluid, the check seal structure includes a valve flap 1602, a guide block 1603, a spring 1604 and a first seal ring 1605, as shown in fig. 6, the valve flap 1602 includes a valve flap main body 1602a and a guide rod 1602b, the valve flap main body 1602a is a truncated cone structure, preferably a circular truncated cone structure, one end of the guide rod 1602b is connected to the end of the valve flap main body 1602a with a smaller area, the second end of the guide rod 1602b is a free end, and the valve flap 1602 can move in the cavity 1601 along the axial direction of the first end cap 160. The valve flap body 1602a is located at a portion near the inside of the valve body 110, and has an end area larger than an opening area of the first end cover 160 thereat. First end cover 160 keeps away from the opening of valve body 110 department is provided with guide block 1603, the second end of guide bar 1602b can slide in guide block 1603, just the cover is equipped with spring 1604 on the guide bar 1602b, spring 1604 will valve flap main part 1602a compresses tightly cavity 161 is close to on the opening part inner wall of valve body 110, and be provided with first sealing washer 1605 at the opening edge, first sealing washer 1605 with valve flap main part 1602a contacts, and through spring 1604 provides the pretightning force, guarantees the leakproofness of this opening part.
Further, the check sealing structure on the first end cover 160 can also be used as a check valve alone, that is, when other parts of the purge valve 100 have faults, only the first end cover 160 is retained to ensure that fluid in the ammonium nitrate system pipeline cannot leak out, and the other parts of the purge valve 100 are repaired after being disassembled.
A valve seat 170 is disposed between the first end cap 160 and the valve ball 130, and a sealing ring is disposed between the valve seat 170 and the valve ball 130. In order to prevent leakage between the first end cap 160 and the valve seat 170, a pressing ring 180 is disposed between the valve seat 170 and the first end cap 160, a spring washer 190 is disposed between the pressing ring 180 and the first end cap 160, a sealing ring is disposed between the pressing ring 180 and the valve seat 170, and the pressing ring 180 is pressed against the valve seat 170 under the action of the spring washer 190 and is in close contact with the sealing ring to ensure the sealing performance there.
Further, when the check seal structure leaks, the valve seat 170 can bear the thrust of the fluid, the valve seat 170 is pressed against the valve ball 130 under the thrust of the fluid and the acting force of the spring washer 190, and the sealing performance is better when the fluid pressure is higher,
the calculation formula is as follows: f is equal to P.A,
f: thrust, in units (N);
p: fluid pressure, in units (MPa);
a: area, unit: mm is2；
A＝(M2-N2)·π/4
M: diameter of the seal ring between the outer ring of the valve seat 170 and the valve body 110, unit (mm)
N: sealing surface middle diameter unit (mm) of valve seat 170 and valve ball 130 sealing ring
Further, in order to prevent the fluid from leaking out of the purge valve 100, sealing rings are disposed between the first end cap 160 and the valve body 110, between the valve seat 170 and the valve body 110, and between the second end cap 161 and the valve body 110, between the third end cap 162 and the valve body 110, and between the fourth end cap 163 and the valve body 110, between the bonnet 120 and the valve body 110, and between the bonnet 120 and the valve stem 140.
The first end cover 160 is connected with a pipeline of an ammonium nitrate system, the second end cover 161 is connected with a steam pipeline, and the third end cover 162 is connected with an exhaust port, as shown in fig. 4, when the ammonium nitrate system is started to operate, the pressure at the first end cover 160 is 0.95MPa, the valve ball 130 is located at a first station, that is, the steam pipeline is communicated with the exhaust port, and the purge valve 100 is in a closed state.
At this time, the valve flap 1602 in the first end cap 160 is pressed against the first seal 1605 by the spring 1604 and the pressure of the fluid, so that the fluid cannot enter the valve body 110.
As shown in fig. 5, when the ammonium nitrate system stops working, the pressure at the first end cap 160 drops to 0, the valve ball 130 rotates to make it at the second position, that is, the ammonium nitrate system pipe is conducted with the steam pipe, steam flows into the valve body 110 from the second end cap 161, and when the steam flows to the valve flap 1602, the steam pushes the valve flap 1602 open, so that the steam can flow out through the cavity 1601 of the first end cap 160, and purge the ammonium nitrate system pipe.
After the purging is completed, the valve ball 130 rotates to the first station again, and waits for the instruction of the next purging operation.
The purge valve 100 provided by the invention is provided with the non-return sealing structure at the port connected with the ammonium nitrate system pipeline, so that the corrosion of the valve body 110 or other pipelines caused by the ammonium nitrate flowing into the valve body 110 is prevented, and the multiple sealing structures are arranged between the first valve cover 160 and the valve seat 170 and between the valve seat 170 and the valve body 110, so that the sealing property of the purge valve 100 is further ensured.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Finally, it should be noted that: it should be understood that the above examples are only for clearly illustrating the present invention and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the scope of the invention.
Claims (7)
1. A purge valve, comprising a valve body, a valve cover, a valve ball, a valve seat, a valve rod and an end cover, wherein the valve cover encapsulates the valve ball inside the valve body, the valve rod passes through the valve cover, one end of the valve rod is connected with the valve ball inside the valve body, the other end of the valve rod is positioned outside the valve body, the valve seat is arranged between the valve ball and the end cover,
the end covers comprise a first end cover, a second end cover and a third end cover, the first end cover and the second end cover are respectively connected with the ammonium nitrate system pipeline and the steam pipeline, the third end cover is connected with the exhaust port, when the ammonium nitrate system is started to operate, the valve ball is positioned at a first station and conducts the steam pipeline with the exhaust port, the purge valve is in a closed state,
a check sealing structure is arranged in at least one end cover, the check sealing structure is independently used as a check valve and is detachably connected with other parts of the purge valve, the first end cover is only reserved to ensure that the fluid in the ammonium nitrate system pipeline cannot leak, and multiple sealing structures are arranged among the valve cover, the valve seat and the valve body,
the check sealing structure is characterized in that a pressing ring is arranged between the valve seat and the first end cover, a spring gasket is arranged between the pressing ring and the first end cover, the pressing ring is pressed on the valve seat under the action force of the spring gasket, the valve seat can bear the thrust of leaked fluid after the check sealing structure leaks, the valve seat is pressed on the valve ball under the action force of the fluid thrust and the spring gasket, and the larger the fluid pressure is, the better the sealing performance is.
2. The purge valve of claim 1, wherein the check seal arrangement comprises a valve flap movably disposed within the end cap, a guide block, a spring, and a first seal ring, the valve flap movably disposed within the end cap, the guide block guiding movement of the valve flap, the spring providing a pre-load force to compress the valve flap against an inner wall of the end cap, the first seal ring disposed between the valve flap and the end cap.
3. The purge valve of claim 2, wherein the flap comprises a flap body and a guide rod having a first end connected to the flap body and a second end that is a free end.
4. The purge valve of claim 3, wherein the flap body is a mesa configuration and the guide rod is connected to the end of the flap having the smaller area.
5. The purge valve of claim 4, wherein the flap body is located proximate an end of the valve body and the guide rod is located distal the valve body.
6. The purge valve of claim 1, wherein the multiple seal structure comprises a seal ring between the clamping ring and the valve seat and a seal ring between the valve seat and the valve body and between the end cap and the valve body.
7. A purge valve as claimed in any one of claims 1 to 6, wherein the valve stem is of a top-loading configuration.
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 CN106321910A (en) | 2017-01-11 |
| CN106321910B true 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) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
Citations (7)
| 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 |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2016
- 2016-08-16 CN CN201610677530.9A patent/CN106321910B/en not_active Expired - Fee Related
Patent Citations (7)
| 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 |
| 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 |
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| Publication number | Publication date |
|---|---|
| CN106321910A (en) | 2017-01-11 |
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