CN102374332B - Water supply and gas seal valve - Google Patents
Water supply and gas seal valve Download PDFInfo
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- CN102374332B CN102374332B CN 201010256479 CN201010256479A CN102374332B CN 102374332 B CN102374332 B CN 102374332B CN 201010256479 CN201010256479 CN 201010256479 CN 201010256479 A CN201010256479 A CN 201010256479A CN 102374332 B CN102374332 B CN 102374332B
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Abstract
The invention relates to a water supply and gas seal valve, which belongs to the technical field of gas pipeline safety installations. The valve is in a funnel shape; the upper part of the valve is provided with an overflow hole; an inlet pipe extending at the bottom end of a conical shell at the lower part of the valve is communicated with a U-shaped pipe in a gas conveying pipeline through a connecting pipe; a valve seat hole in the inlet pipe is provided with a valve core; the upward side of the valve core is connected with a floating ball through an upwards extending valve rod; guide plates extending in the radial direction are fixedly connected with a conical shield in the conical shell; ring conical runners separated by the guide plates are formed between the conical shell and the conical shield; the valve rod and a positioning central hole at the bottom end of the conical shield are in movable fit; and the floating ball is located in the conical shield. According to the water supply and gas seal valve, when abnormally high pressure is generated on gas, the valve core can overcome the high pressure under the combined action of both dead weight and backflow force to rapidly close a valve seat, and thereby, the gas is prevented from leaking. Subsequently, water is gradually supplemented to the U-shaped pipe, and when the water supplement height meets the requirement, the floating ball automatically floats, thereby, the valve is opened, so that a water seal normally performs an action.
Description
Technical field
The present invention relates to a kind of envelope air valve, especially a kind of water flowing envelope air valve belongs to gaspipe line safety installations technical field.
Background technique
Along with deepening continuously of energy-saving and emission-reduction work, the coal gas diffusion rate continues to reduce, the possibility of coal gas system pressure surge also increases greatly, especially when coal gas discharge pressure during in a high position, run into some special circumstances such as moment, be easy to cause the pressure surge of coal gas, the result, gas pipe line water seal on the way will produce the problem of breaking through because of superpressure moment.
At present, the coal gas gas holder is being born the pressure controlled effect of coal gas system in coal gas system: when gas pressure is low, and exhaust; When pressure is high, gas storage.But when gas pressure moment rising, be difficult to play a role.In addition, although gas bleeding valve can play the discharging effect, when gas pressure surpasses specified height in limited time, automatically open the valve emission coal gas, diffuse in the situation at long-term " zero ", gas bleeding valve because of for a long time need not, very difficult assurance is diffused successfully at every turn.
Understand according to the claimant, the water seal for coal gas of domestic use has U-shaped water seal and multiple flow water seal, has determined its water seal height during front a kind of installation, rear a kind of height that improves water shutoff by increasing flow process.In general, when water shutoff is broken through, just there is the gas leakage problem in moment when not resisting the active force of gas pressure.Therefore, how to guarantee gaspipe line when abnormal pressure occurring, still can reliably prevent gas leakage, become gas supply and use a large crucial research topic of system.
Summary of the invention
The object of the invention is to: for the demand for security on existing gas conveying tube road, propose a kind of can be after water seal be broken through by high pressure, rapid closing passage, reliably prevent the water flowing envelope air valve of gas leakage, and when this valve highly reaches requirement when moisturizing, can automatically open, thereby water seal is normally played a role.
In order to reach above purpose, water flowing envelope air valve of the present invention is funnel-like, and top has flow-off, and the U-shaped pipe that the extended inlet tube in conical shell bottom of bottom passes through to take over in the gas conveying tube road is communicated with; On the valve seat orifice in the described inlet tube spool is housed, described spool top is connected with ball float by upwardly extending valve rod; Be connected by water conservancy diversion leaf and the cone-shaped hood that radially extends in the described conical shell, form the ring tapered runner that diversed leaf is separated between described conical shell and the cone-shaped hood; Described valve rod becomes movingly with the positioning center hole of cone-shaped hood bottom, and described ball float is positioned at cone-shaped hood.
During normal operation, owing to be marked with water in the U-shaped pipe, therefore can work as gas pressure when certain limit fluctuates, prevent that it from leaking.When abnormal pressure occurring, coal gas will promote the water in the U-shaped pipe, overflow from flow-off and water seal is broken through.Therefore at this moment, because current through the ring tapered runner, according to fluid mechanics principle, will produce backflow power to the top of ball float, make spool simultaneously under the acting in conjunction of deadweight and backflow power, overcome high pressure, and close rapidly valve seat, thereby prevent that coal gas from leaking.Afterwards, gradually moisturizing in the U-shaped pipe, when moisturizing highly reaches requirement, ball float will float automatically, thereby open valve, and water seal is normally played a role.
It is that the cone angle of described cone-shaped hood like this can more efficiently generation backflow power in 80-120 ° of scope that the present invention further improves.
Description of drawings
The present invention is further illustrated below in conjunction with accompanying drawing.
Fig. 1 is the general structure schematic representation of one embodiment of the invention.
Fig. 2 is the structure for amplifying schematic representation of water flowing envelope air valve among Fig. 1 embodiment.
Fig. 3 is the structure for amplifying schematic representation of tapered segment among Fig. 2.
Fig. 4 is the structure for amplifying schematic representation of cone-shaped hood among Fig. 3.
Among the figure: the 1-suction flange; The 2-water-adding pipe; The 3-valve seat; The 4-spool; 5-weight adjusting strip; 6-screws nut; The 7-valve rod; The 8-positioning center hole; 9-rotation water conservancy diversion leaf; 10-tapered centre cover; 10-1--cone-shaped hood groove; The 11-hollow float; The 12-valve housing; The 13-overflow; 14-discharging and peep hole; The 15-inlet tube; 16-spool buoy; 17-U shape pipe; The 18-waste pipe; The 19-drain valve; 20-U shape water seal header; 21-header wicket.
Embodiment
Embodiment one
The water flowing of present embodiment is sealed air valve as shown in Figure 2, and the profile of valve housing 12 is funnel-like, and top one side has flow-off 13, the extended inlet tube 15 in the conical shell bottom of bottom, and the U-shaped pipe 17 that this pipe passes through to take over in the gas conveying tube road is communicated with.
Adapter is made of U-shaped water seal header 20 and waste pipe 18, and the lower end of described inlet tube 15 is communicated with a place of U-shaped water seal header 20, and another place of this header is communicated with the lowest part of U-shaped pipe 17 in the gas conveying tube road by upwardly extending waste pipe 18.
Valve seat 3 centers in the inlet tube 15 have through hole, and it is the spool 4 of spherical crown surface that the bottom surface is housed on this hole, and this spool top is connected with ball float 11 by upwardly extending valve rod 7.For can adjusting dead weight, also be fixed with weight adjusting strip 5 on the spool 4.Be connected with cone-shaped hood 10 by the some water conservancy diversion leaves 9 that radially extend in the conical shell of valve housing bottom, form the ring tapered runner that diversed leaf 9 is separated between conical shell and the cone-shaped hood 10.8 one-tenth of the positioning center holes of valve rod 7 and cone-shaped hood bottom movingly, ball float 11 is positioned at cone-shaped hood 10, its top exceeds cone-shaped hood, and is fixed with the buoy 16 with scale.Water supplement port 2 also leads to peep hole 14 places at valve housing top when leading to inlet tube 15.
Present embodiment produces the theoretical foundation that acts on ball float backflow power: in fluid mechanics, flow can produce the backflow negative pressure behind obstacle behind obstacle.When the nonviscous fluid Circular Cylinder, because flow separation occurs at the rear portion, pressure can not return to the level identical with the front portion, therefore keeps negative value (gauge pressure).
Experiment records, the boundary separation of periphery pressure coefficient is o'clock about about 80 °, boundary layer transition is the separation point of separation to occur after the turbulent flow about about 120 °, so the cone angle (present embodiment is about 90 °) in 80-120 ° of scope of described cone-shaped hood, like this can more efficiently generation backflow power.In addition, fluid is different from the situation of non-rotary free jet through the distribution situation of water conservancy diversion leaf rotary jet tangential velocity, and near the speed its axle center is on the contrary little, and often is negative value.This is because swirling eddy entrainments ambient gas to get more and more, and the momentum of air-flow is certain, so speed is inevitable more and more less, and fast with decaying to of tangential velocity.Accordingly, to be beneficial to the eddy flow that produces backflow power in order being formed with, to form the helix angle (referring to Fig. 2) of 30-60 ° (preferably 45 °) between each water conservancy diversion leaf 9 and the cone-shaped hood.
During specific design, the top edge of cone-shaped hood 10 exceeds the ball float center is advisable, and engraves out four groove 10-1 (referring to Fig. 4) along the cone-shaped hood bus, as the usefulness of leaking, is conducive to further eliminate the whereabouts resistance of ball float.Every groove adds the weldering shutter.Rotation water conservancy diversion leaf is arranged in tapered centre cover and the valve housing conical shell makeup ring tapered runner, and rotation water conservancy diversion number of sheets amount is advisable greater than 8, and is uniform along ring.
Test shows, in the situation that water seal for coal gas breaks through, original water shutoff is substituted by mobile coal gas in the coal gas water shutoff pipeline, coal gas enters the water flowing envelope air valve of present embodiment, walk around the shunting of valve body tapered centre cover and rotation water conservancy diversion leaf rotary steering, backflow has been formed at (top) behind tapered centre cover and hollow float, make the ball float loss of buoyance, be subjected to the effect of the spool connection part self gravitation of valve, move down along the valve rod positioning center hole, the band ovable valve stem moves down with valve seat with spool and contacts, thus throttle down, cut off path, prevent gas leak.
Behind the valve closing, water seal water replenishing is through water supplement port moisturizing in the valve intake pipe.After water shutoff highly reached water shutoff requirement or inlet tube and advances full water, moisturizing entered valve, and hollow float floats again behind the valve full water, moves on band ovable valve stem, the spool, namely automatically opens valve, treats the overflow water outlet, and the water shutoff effect of water seal can normally be brought into play.
Evidence adopts this fact Example to improve the safety reliability of low-pressure gas water seal, drainage system, the automatic water supplement problem after efficiently solving water seal for coal gas and breaking through.
In addition to the implementation, the present invention can also have other mode of executions.All employings are equal to the technological scheme of replacement or equivalent transformation formation, all drop on the protection domain of requirement of the present invention.
Claims (6)
1. air valve is sealed in a water flowing, and water flowing envelope air valve is funnel-like, and top has flow-off, and the U-shaped pipe that the extended inlet tube in conical shell bottom of bottom passes through to take over in the gas conveying tube road is communicated with; On the valve seat orifice in the described inlet tube spool is housed, described spool top is connected with ball float by upwardly extending valve rod; Be connected by water conservancy diversion leaf and the cone-shaped hood that radially extends in the described conical shell, form the ring tapered runner that diversed leaf is separated between described conical shell and the cone-shaped hood; Described valve rod becomes movingly with the positioning center hole of cone-shaped hood bottom, and described ball float is positioned at cone-shaped hood, and the cone angle of described cone-shaped hood is 80-120 °; Form 30-60 ° helix angle between described water conservancy diversion leaf and the cone-shaped hood.
2. air valve is sealed in water flowing according to claim 1, and it is characterized in that: the bus of described cone-shaped hood is engraved out the groove of the usefulness of leaking, and described groove adds shutter.
3. air valve is sealed in water flowing according to claim 2, and it is characterized in that: the top edge of described cone-shaped hood exceeds the ball float center.
4. air valve is sealed in water flowing according to claim 3, it is characterized in that: described adapter is made of U-shaped water seal header and waste pipe, the lower end of described inlet tube is communicated with a place of U-shaped water seal header, and another place of described header is communicated with the lowest part of U-shaped pipe in the gas conveying tube road by upwardly extending waste pipe.
5. water flowing envelope air valve according to claim 4 is characterized in that: also be fixed with the weight adjusting strip on the described spool.
6. air valve is sealed in water flowing according to claim 5, it is characterized in that: water supplement port also leads to the peep hole place at valve housing top when leading to described inlet tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010256479 CN102374332B (en) | 2010-08-18 | 2010-08-18 | Water supply and gas seal valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010256479 CN102374332B (en) | 2010-08-18 | 2010-08-18 | Water supply and gas seal valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102374332A CN102374332A (en) | 2012-03-14 |
| CN102374332B true CN102374332B (en) | 2013-10-23 |
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ID=45793371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010256479 Expired - Fee Related CN102374332B (en) | 2010-08-18 | 2010-08-18 | Water supply and gas seal valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102374332B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104214407B (en) * | 2013-09-05 | 2017-06-06 | 东莞市山田精密机械有限公司 | One kind flows draining valve |
| CN111911487A (en) * | 2020-06-24 | 2020-11-10 | 燕山大学 | Exhaust valve |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4566485A (en) * | 1984-11-19 | 1986-01-28 | Ruhle James L | Free-floating neutrally-buoyant reciprocating pump valve for abrasive fluids |
| CN200968425Y (en) * | 2006-10-25 | 2007-10-31 | 林建立 | Water purifier back valve |
| CN200972055Y (en) * | 2006-10-18 | 2007-11-07 | 济南海鹰机电制造有限公司 | Gas leakage-proof device for gas pipeline drainage device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11270734A (en) * | 1998-03-20 | 1999-10-05 | Nisshin Steel Co Ltd | Gas blow preventing valve |
-
2010
- 2010-08-18 CN CN 201010256479 patent/CN102374332B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4566485A (en) * | 1984-11-19 | 1986-01-28 | Ruhle James L | Free-floating neutrally-buoyant reciprocating pump valve for abrasive fluids |
| CN200972055Y (en) * | 2006-10-18 | 2007-11-07 | 济南海鹰机电制造有限公司 | Gas leakage-proof device for gas pipeline drainage device |
| CN200968425Y (en) * | 2006-10-25 | 2007-10-31 | 林建立 | Water purifier back valve |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平11-270734A 1999.10.05 |
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| Publication number | Publication date |
|---|---|
| CN102374332A (en) | 2012-03-14 |
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Granted publication date: 20131023 Termination date: 20190818 |
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