CN104344003A - Ball valve blockage preventing mechanism - Google Patents
Ball valve blockage preventing mechanism Download PDFInfo
- Publication number
- CN104344003A CN104344003A CN201310347967.2A CN201310347967A CN104344003A CN 104344003 A CN104344003 A CN 104344003A CN 201310347967 A CN201310347967 A CN 201310347967A CN 104344003 A CN104344003 A CN 104344003A
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- CN
- China
- Prior art keywords
- valve
- ball
- valve ball
- blocking
- impurity
- 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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Taps Or Cocks (AREA)
Abstract
The invention discloses a ball valve blockage preventing mechanism. When a ball valve is blocked, a valve ball rotates towards a valve opening direction till a full-open position, the valve ball further rotates, as shown in figures, impurities 5 are blocked between a valve ball channel 3 and a valve seat channel 4, in the moving direction 6 of the valve ball, the valve ball shears with the valve seat to push the impurities 5, and the impurities 5 loose and are brought away by fluid.
Description
Technical field
The present invention relates to a kind of ball valve, it can automated cleaning after valve ball is by impurity blocking.
Background technique
Ball valve have structure simple, open and close rapidly, fluid resistance is little, the advantage of good seal performance, application is very extensive, but due to the existence of the impurity such as welding slag, iron rust, flax silk in pipeline, often causes valve ball blocking, cannot close and put in place.Now in the art for solving problems, adopting hard sealing technique, by the strong shear between metal seat valve and valve ball, cutting off impurity and overcoming blocking.But metal hard-sealing cost is higher, need very large driving moment simultaneously.
Summary of the invention
The technical problem that the present invention mainly solves: after valve ball is by impurity blocking, can loosen the impurity of blocking, reach the effect of automated cleaning.
The technological scheme that the present invention solves the problems of the technologies described above comprises following:
1, a kind of ball valve Anti-blockage mechanism, is characterized in that: after blocking, after rotating valve ball to standard-sized sheet, continues rotation angle to opening direction.
2, machine-processed as claimed in claim 1, it is characterized in that: the effective travel of the correspondence of above-mentioned angle is between 20% ~ 40%.
3, machine-processed as claimed in claim 1, be characterised in that: in the rotation of above-mentioned angle, the moment of use is greater than positive normal close valve moment.
4, machine-processed as claimed in claim 1, be characterised in that: in above process, increase rate of flow of fluid.
The beneficial effect of such scheme is:
A) loosen the impurity of blocking, reach the effect of automated cleaning.
B) namely ensure cleaning effect, turn avoid excessive valve ball stroke.
C) prevent impurity blocking tension and cannot loosen.
D) ensure that impurity can be taken away by fluid.
Accompanying drawing explanation
Fig. 1: ball valve is illustrated.
1. valve ball 2. valve seat 3. valve ball passage 4. valve base channel
Fig. 2: valve complete shut-down, valve ball passage and valve base channel stagger completely.
3. valve ball passage 4. valve base channel
Fig. 3: valve wide open, valve ball passage overlaps completely with valve base channel.
3. valve ball passage 4. valve base channel
Fig. 4: equal percentage valve ball passage.
3. valve ball passage
Fig. 5: when closing valve, blocking occurs.
3. valve ball passage 4. valve base channel 5. impurity 6. valve ball moving direction
Fig. 6: carry out clean conditions.
3. valve ball passage 4. valve base channel 5. impurity 6. valve ball moving direction
Fig. 7: 40% clean stroke.
3. valve ball passage 4. valve base channel
Embodiment
In order to make object of the present invention, technological scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Fig. 1 is the sectional drawing of ball valve, and valve ball rotates around the centre of sphere, makes valve ball passage stagger with valve base channel, overlap, realizes the Push And Release of valve.
Schematic diagram during Fig. 2 valve complete shut-down, now valve ball passage and valve base channel stagger completely, and fluid cannot circulate.In order to reliable sealing, during valve closing, valve ball often will continue to rotate to an angle from the closed positions of this figure, and valve ball passage and valve base channel are staggered certain distance, and this section of stroke is disregarded in the effective travel of this explanation.
Schematic diagram during Fig. 3 valve wide open, now valve ball passage overlaps completely with valve base channel, and flow resistance is minimum.
In order to there be better metering characteristics, often valve ball passageway machining is become special-shaped, Fig. 4 is the valve ball passage of equal percentage ball valve, can find out the easier blocking of impurity.Also have and valve base channel is processed into abnormal shape, valve ball passage keeps circular design, and the present invention is also applicable.
Fig. 5 closes the signal that blocking occurs in valve process, because impurity 5 blocks valve ball passage move right direction, the moment of valve ball is larger, and impurity 5 blocks tighter.In this figure, valve ball passage is special-shaped, more easily blocking occurs, but has both made valve ball passage for circular, and possibility blocking equally, the present invention is also applicable.
In an embodiment of the present invention, valve driver controller judges the generation of blocking by travel feedback and driving current.After blocking being detected, controller enters cleaning mode, and driving valve ball rotates to opening direction by motor.When having arrived valve wide open position, in the valve opening process of routine, now valve opening position limit switch is by action, and drive motor quits work.But in the present embodiment, as shown in Figure 6, motor will work on, valve ball is driven to continue to rotate (this section extra stroke hereinafter referred to as clean stroke), the impurity 5 being now stuck in valve ball passage place loosens being promoted by the shearing of valve ball and valve seat, is taken away, play the effect of automated cleaning by fluid.After valve ball arrives the terminal of clean stroke, controller enters normal mode of operation.
In the present embodiment, as too short in clean stroke, then the limited efficiency that may clean, as long in clean stroke, then increase clean time and the cost of mechanical mechanism.If valve ball is defined as the effective travel of valve by stroke Fig. 2 closed positions to Fig. 3 fully open position, as seen from Figure 7, when clean stroke is greater than 40% of effective travel, even the valve ball of equal percentage, runner is also more concentrated, is not easy to the small flow channels of blocking.At the present embodiment, clean stroke get effective travel 20% ~ 40% between, one stroke switch is separately set in clean stroke end and judges to facilitate controller.
If the moment of closing valve is too large, impurity card is made to obtain tension, likely in cleaning course, the shearing of valve ball and valve seat promotes to loosen impurity, therefore in the present embodiment, driver adopts direct current generator, regulates the driving voltage of motor thus regulation output moment by PWM, makes the moment of cleaning course be greater than the moment of closing valve process.
When rate of flow of fluid in pipeline is very low, the impurity loosened in cleaning course possibly cannot be taken away by fluid, causes blocking again.Therefore, in the present embodiment, after entering cleaning mode, controller notice upper-level control system, opens the rotating speed of large upstream valve or raising pump, to increase rate of flow of fluid.
Under preventing extreme case, driver because pass valve repeatedly, blocking, clean process cause mechanical wear, motor overheating, the present embodiment middle controller when continuously after clean 2 times still blocking, stop entering cleaning mode, and generate acoustooptic alarm.
Claims (4)
1. a ball valve Anti-blockage mechanism, is characterized in that:
After blocking, after rotating valve ball to standard-sized sheet to opening direction, continue rotation angle.
2. machine-processed as claimed in claim 1, it is characterized in that:
The effective travel of the correspondence of above-mentioned angle is between 20% ~ 40%.
3. machine-processed as claimed in claim 1, be characterised in that:
In the rotation of above-mentioned angle, the moment of use is greater than positive normal close valve moment.
4. machine-processed as claimed in claim 1, be characterised in that:
In above process, rate of flow of fluid is increased.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310347967.2A CN104344003A (en) | 2013-08-09 | 2013-08-09 | Ball valve blockage preventing mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310347967.2A CN104344003A (en) | 2013-08-09 | 2013-08-09 | Ball valve blockage preventing mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104344003A true CN104344003A (en) | 2015-02-11 |
Family
ID=52500217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310347967.2A Pending CN104344003A (en) | 2013-08-09 | 2013-08-09 | Ball valve blockage preventing mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104344003A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106441521A (en) * | 2016-11-04 | 2017-02-22 | 江苏金钰铭电子有限公司 | Full-automatic serial connection water meter verification and calibration device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2603884Y (en) * | 2003-01-22 | 2004-02-18 | 华英伦铜制品（宁波）有限公司 | Ball valve |
| US20080105845A1 (en) * | 2006-11-07 | 2008-05-08 | Yeary & Associates, Inc. | Ball valve with flow-through feature |
| CN201531643U (en) * | 2009-09-16 | 2010-07-21 | 四川苏克流体控制设备有限公司 | Hard seal structure of ball valve |
| CN201723769U (en) * | 2010-07-26 | 2011-01-26 | 苏州工业园区思达德阀门有限公司 | Valve seat two-way sealing ball valve |
| CN102442554A (en) * | 2011-09-14 | 2012-05-09 | 中冶南方工程技术有限公司 | Spherical flow adjusting valve |
-
2013
- 2013-08-09 CN CN201310347967.2A patent/CN104344003A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2603884Y (en) * | 2003-01-22 | 2004-02-18 | 华英伦铜制品（宁波）有限公司 | Ball valve |
| US20080105845A1 (en) * | 2006-11-07 | 2008-05-08 | Yeary & Associates, Inc. | Ball valve with flow-through feature |
| CN201531643U (en) * | 2009-09-16 | 2010-07-21 | 四川苏克流体控制设备有限公司 | Hard seal structure of ball valve |
| CN201723769U (en) * | 2010-07-26 | 2011-01-26 | 苏州工业园区思达德阀门有限公司 | Valve seat two-way sealing ball valve |
| CN102442554A (en) * | 2011-09-14 | 2012-05-09 | 中冶南方工程技术有限公司 | Spherical flow adjusting valve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106441521A (en) * | 2016-11-04 | 2017-02-22 | 江苏金钰铭电子有限公司 | Full-automatic serial connection water meter verification and calibration device |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150211 |
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| WD01 | Invention patent application deemed withdrawn after publication |