CN103511696B - A kind of excess flow valve that can realize automatically reseting with zero leakage - Google Patents
A kind of excess flow valve that can realize automatically reseting with zero leakage Download PDFInfo
- Publication number
- CN103511696B CN103511696B CN201310435009.0A CN201310435009A CN103511696B CN 103511696 B CN103511696 B CN 103511696B CN 201310435009 A CN201310435009 A CN 201310435009A CN 103511696 B CN103511696 B CN 103511696B
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- CN
- China
- Prior art keywords
- flap
- guide pin
- pin bushing
- valve
- excess flow
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- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/24—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member
- F16K17/28—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only
- F16K17/30—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only spring-loaded
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
- F16K1/38—Valve members of conical shape
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0254—Construction of housing; Use of materials therefor of lift valves with conical shaped valve members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0272—Construction of housing; Use of materials therefor of lift valves valves provided with a lining
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
The present invention relates to pipeline flow guard technology, specifically disclose a kind of excess flow valve that can realize and automatically reseting with zero leakage.Including valve body, flap, adjustment packing ring, guide pin bushing, locking lasso, spring, upper spring seat, locking nut, stop valve, by-pass line, adjustment packing ring is set between guide pin bushing and valve body, the top of guide pin bushing is provided with ledge structure can fix spring bottom, flap traverse guide pin bushing, upper spring seat is connected with flap bar portion, by special bypass reset adjustment structure, cone-shaped seal structure, it is ensured that the high leakproofness after excess flow valve closedown, the reality of the reliability of reset and control point resetting time.The use closing the double; two adjustment structure of flow adds the range of accommodation closing flow and closes the accuracy of flow.
Description
Technical field
The invention belongs to flow guard technology, be specifically related to a kind of fast shut-off valve.
Background technology
Excess flow valve is a kind of flow preventer, and in normal operating conditions, when passing through the flow in prescribed limit in pipeline, valve is on, and medium can pass through from excess flow valve.When occurring that pipeline or auxiliary device break, and filler come off etc. accident time, the rate-of flow in pipeline can increase sharply, and after exceeding setting, this valve is then automatically switched off, to prevent medium in basin to run off in a large number.
Common excess flow valve has two kinds of forms, and a kind of structure is without bypass, and excess flow valve, after occurring that flow is excessive and causing valve closing, must be pulled down and the flap of excess flow valve could be allowed to reset by this type of valve.Another kind of structure is band discharge orifice on flap, repair complete at the equipment broken down, and after closedown valve downstream, medium flows through aperture, through after a period of time, excess flow valve upstream and downstream pressure differential reaches balance, and flap can automatically reset, the valve in downstream, system recovery normal operation is opened again after excess flow valve automatically resets.But owing to there being aperture on flap, this type of valve still has a large amount of medium to flow out from flap after closedown and causes waste, and is likely to result in environmental pollution.Additionally if distant or valve downstream the sealing of distance of excess flow valve and valve downstream has been not as, the resetting time of valve can very be grown and even cannot reset.
Summary of the invention
It is an object of the invention to provide a kind of excess flow valve that can realize and automatically reseting with zero leakage.
Technical scheme is as follows:
A kind of excess flow valve that can realize automatically reseting with zero leakage, it includes valve body and flap, the processing of its center has stepped throughhole, flap it is provided with in through hole, described flap is by disk and shaft-like forms, and the stem portion of described flap is set with guide pin bushing, spring, upper spring seat and locking nut from bottom to up successively, and described valve body side is additionally provided with by-pass line, it is connected with the through hole in valve body, and by-pass line is provided with stop valve.
At above-mentioned a kind of excess flow valve that can realize automatically reseting with zero leakage, the top and bottom of described valve body are provided with bypass endoporus, connect with the through hole in valve body by by-pass line by bypassing endoporus.
At above-mentioned a kind of excess flow valve that can realize automatically reseting with zero leakage, the center of described guide pin bushing is provided with prominent round platform, and guide pin bushing center is provided with installing hole, outside making guide pin bushing be sleeved on the stem portion of flap by installing hole.
At above-mentioned a kind of excess flow valve that can realize automatically reseting with zero leakage, between described guide pin bushing bottom surface and the stair-step of through hole, it is provided with adjustment packing ring.
At above-mentioned a kind of excess flow valve that can realize automatically reseting with zero leakage, the step place processing of the stepped throughhole lower end of described valve body has taper disc, and the disk lower surface processing of the lower end of flap has taper disc, is formed and seals structure.
At above-mentioned a kind of excess flow valve that can realize automatically reseting with zero leakage, the thread segment of described guide pin bushing is provided with guide frame.
The remarkable result of the present invention is in that:
When, after the failture evacuation of system, closing the valve in excess flow valve downstream, open the bypass stop valve of excess flow valve, the pressure differential on excess flow valve flap can slowly reduce, and when pressure differential is less than the compression stress of spring, flap reopens, thus realizing the reset function of excess flow valve.
Medium only flows out valve by flap place.When rate-of flow exceedes setting value, on flap pressure reduction increase, flap moves along media flow direction and causes valve closing, now excess flow valve main road (flap place) and bypass all be closedown, medium will not leak.
Close at control valve and be provided with two adjustment structures in flow: adjusting pad coil structures is set between guide pin bushing and valve body, spring base and locking nut structure are set at spring one end.Two adjustment structures can adjust the active force of medium and the active force of spring respectively, thus being greatly increased the adjusting range closing flow, and is easier to ensure that the decrement of spring is in the reasonable scope.
Designing conical surface sealing structure simultaneously, compared with traditional flat seal, be conducive to obtaining bigger seal pressure in sealing place, conical surface place not easily stockpiles foreign material simultaneously, further ensures sealing.
In order to be further ensured that conical surface seal has good sealing property, the basis that guide pin bushing and valve body screw thread connect arranges the guide section that fit clearance is only small, to improve the centering of flap action.
Accompanying drawing explanation
Fig. 1 is the excess flow valve schematic diagram that can realize automatically reseting with zero leakage；
Fig. 2 is for adjusting packing ring scheme of installation；
Fig. 3 is cone seal schematic diagram；
In figure: 1. valve body；2. flap；3. adjust packing ring；4. guide pin bushing；5. locking lasso；6. spring；7. upper spring seat；8. locking nut；9 stop valves；10. by-pass line；11. bypass endoporus；12. step；13. the lower surface of disk.
Detailed description of the invention
Below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.
As it is shown in figure 1, the processing of valve body 1 center has through hole, the lower end of through hole is stepped.Flap 2 is installed in through hole, is disk bottom described flap 2, disk is shaft-like.It is set with guide pin bushing 4 outside shaft-like.The center processing of described guide pin bushing 4 has prominent frustum cone structure, center processing has installing hole, outside making guide pin bushing 4 be sleeved on the stem portion of flap 2 by installing hole, described guide pin bushing 4 is provided with locking lasso 5, for threadeding between locking lasso 5 and valve body 1, by locking lasso 5, guide pin bushing 4 is locked.Described guide pin bushing 4 with valve body 1 for threadeding.
As in figure 2 it is shown, in order to adjust the flap 2 stroke in closing process, in order to changing the medium active force to flap 2, between guide pin bushing 4 bottom surface and the stair-step of through hole, fixed installation adjusts packing ring 3.
As it is shown in figure 1, the frustum cone structure at described guide pin bushing 4 center is arranged above spring 6, this spring 6 is sleeved on the frustum cone structure of guide pin bushing 3, and spring 6 is arranged above upper spring seat 7, and is locked by upper spring seat 7 by locking nut 8.Namely the stem portion of flap 2 is set with guide pin bushing 4, spring 6, upper spring seat 7 and locking nut 8 from bottom to up successively.
The present invention mainly thes improvement is that, is provided with by-pass line 10 between upper surface and the lower surface of described valve body 1, by the top and bottom of valve body 1 processing bypass endoporus 11, allowing by-pass line 10 connect with the through hole in valve body 1 by bypassing endoporus 11.And by-pass line 10 is installed stop valve 9 and controls opening and closing.
The stop valve 9 of bypass structure is normally closed, is just opened by external force when only there is a need to reset.When system malfunctions rate-of flow exceedes setting value, on flap 2, medium differential pressure increase causes that medium active force increases, and flap 2 moves along media flow direction and causes valve closing, and now two bypasses of excess flow valve are all close, and medium will not leak.When, after the failture evacuation of system, closing the valve in excess flow valve downstream, open the bypass stop valve 9 of excess flow valve, the pressure differential of the flap 2 of excess flow valve can slowly reduce, when pressure differential is smaller, the compression stress of spring 6 can open flap 2, thus realizing the reset function of excess flow valve.
As it is shown on figure 3, in order to improve sealing effectiveness further, at the step structure place of described valve body 1 through hole lower end, in the position with the step 12 of 2 times end in contact of flap, process taper disc；Also processing taper disc in the disk lower surface 13 of the lower end of flap 2, when flap 2 moves in valve body 1, above-mentioned two taper disc contacts, and it is equal to design cone angle simultaneously.
Guide pin bushing 4 and valve body 1 are threaded connection, and process one section of guide frame at the thread segment place of guide pin bushing 4 so that flap 2 keeps good centering when moving, and add the setting of taper circle surface seal structure, it is ensured that the sealing of excess flow valve.
Claims (5)
1. the excess flow valve that can realize automatically reseting with zero leakage, it includes valve body (1) and flap (2), the processing of its center has stepped throughhole, flap (2) it is provided with in through hole, described flap (2) is by disk and shaft-like forms, the stem portion of described flap (2) is set with guide pin bushing (4) from bottom to up successively, spring (6), upper spring seat (7) and locking nut (8), it is characterized in that: described valve body (1) side is additionally provided with by-pass line (10), it is connected with the through hole in valve body (1), and by-pass line (10) is provided with stop valve (9)；The top and bottom of described valve body (1) are provided with bypass endoporus (11), by bypassing endoporus (11), by-pass line (10) are connected with the through hole in valve body (1).
2. a kind of excess flow valve that can realize automatically reseting with zero leakage as claimed in claim 1, it is characterized in that: the center of described guide pin bushing (4) is provided with prominent round platform, guide pin bushing (4) center is provided with installing hole, outside making guide pin bushing (4) be sleeved on the stem portion of flap (2) by installing hole.
3. a kind of excess flow valve that can realize automatically reseting with zero leakage as claimed in claim 1, it is characterised in that: described guide pin bushing (4) is provided with adjustment packing ring (3) between bottom surface and the stair-step of through hole.
4. a kind of excess flow valve that can realize automatically reseting with zero leakage as claimed in claim 1, it is characterized in that: the step place processing of the stepped throughhole lower end of described valve body (1) has taper disc, and disk lower surface (13) processing of the lower end of flap (2) has taper disc, formed and seal structure.
5. a kind of excess flow valve that can realize automatically reseting with zero leakage as claimed in claim 4, it is characterised in that: the thread segment of described guide pin bushing (4) is provided with guide frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310435009.0A CN103511696B (en) | 2013-09-23 | 2013-09-23 | A kind of excess flow valve that can realize automatically reseting with zero leakage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310435009.0A CN103511696B (en) | 2013-09-23 | 2013-09-23 | A kind of excess flow valve that can realize automatically reseting with zero leakage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103511696A CN103511696A (en) | 2014-01-15 |
| CN103511696B true CN103511696B (en) | 2016-07-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310435009.0A Active CN103511696B (en) | 2013-09-23 | 2013-09-23 | A kind of excess flow valve that can realize automatically reseting with zero leakage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103511696B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110594462A (en) * | 2019-09-26 | 2019-12-20 | 延安大学 | Explosion-proof flow-limiting valve |
| CN113531402B (en) * | 2021-08-11 | 2023-08-15 | 三门核电有限公司 | Full-automatic high-sensitivity pipe network leakage monitoring sensor |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2591060A (en) * | 1946-03-09 | 1952-04-01 | Phillips Petroleum Co | Excess flow control valve |
| GB706674A (en) * | 1952-08-05 | 1954-03-31 | Phillips Petroleum Co | Improvements in or relating to excess flow valves |
| DE2343645A1 (en) * | 1973-08-30 | 1975-03-27 | Koch & Mueller Armaturenfab | Self closing valve - has adjustable gap between plunger and conical seat for leak protection |
| US5474105A (en) * | 1994-03-31 | 1995-12-12 | The Aro Corporation | Overrun control device |
| CN201412523Y (en) * | 2009-06-22 | 2010-02-24 | 上海宝钢化工有限公司 | Overflow valve |
| CN102777648A (en) * | 2012-06-14 | 2012-11-14 | 珠海爱迪生节能科技有限公司 | Flow limiting shutoff valve |
| CN203571151U (en) * | 2013-09-23 | 2014-04-30 | 北京航天动力研究所 | Overflow valve capable of resetting automatically and free from leakage |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8020582B2 (en) * | 2007-01-27 | 2011-09-20 | Plainsman Manufacturing Inc. | Excess flow valve |
-
2013
- 2013-09-23 CN CN201310435009.0A patent/CN103511696B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2591060A (en) * | 1946-03-09 | 1952-04-01 | Phillips Petroleum Co | Excess flow control valve |
| GB706674A (en) * | 1952-08-05 | 1954-03-31 | Phillips Petroleum Co | Improvements in or relating to excess flow valves |
| DE2343645A1 (en) * | 1973-08-30 | 1975-03-27 | Koch & Mueller Armaturenfab | Self closing valve - has adjustable gap between plunger and conical seat for leak protection |
| US5474105A (en) * | 1994-03-31 | 1995-12-12 | The Aro Corporation | Overrun control device |
| CN201412523Y (en) * | 2009-06-22 | 2010-02-24 | 上海宝钢化工有限公司 | Overflow valve |
| CN102777648A (en) * | 2012-06-14 | 2012-11-14 | 珠海爱迪生节能科技有限公司 | Flow limiting shutoff valve |
| CN203571151U (en) * | 2013-09-23 | 2014-04-30 | 北京航天动力研究所 | Overflow valve capable of resetting automatically and free from leakage |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103511696A (en) | 2014-01-15 |
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