CN111350855A - Self-plugging method and self-plugging valve for pipeline fluid - Google Patents
Self-plugging method and self-plugging valve for pipeline fluid Download PDFInfo
- Publication number
- CN111350855A CN111350855A CN202010310427.7A CN202010310427A CN111350855A CN 111350855 A CN111350855 A CN 111350855A CN 202010310427 A CN202010310427 A CN 202010310427A CN 111350855 A CN111350855 A CN 111350855A
- Authority
- CN
- China
- Prior art keywords
- pipeline
- plug body
- pressure
- fluid
- outlet
- 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
Links
- 239000012530 fluid Substances 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000007789 gas Substances 0.000 claims abstract description 17
- 239000002360 explosive Substances 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims abstract description 4
- 231100001261 hazardous Toxicity 0.000 claims abstract 2
- 230000005484 gravity Effects 0.000 claims description 4
- 230000009286 beneficial effect Effects 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 3
- 230000035945 sensitivity Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 3
- 230000002159 abnormal effect Effects 0.000 abstract description 2
- -1 various flammable Substances 0.000 abstract 2
- 239000000463 material Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000002737 fuel gas Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012954 risk control Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 238000009423 ventilation Methods 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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
-
- 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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pipe Accessories (AREA)
Abstract
The invention relates to a pipeline fluid self-plugging method and a pipeline fluid self-plugging valve. The fluid flowing in the pipeline forms pressure difference on the plug body (2) to generate a thrust action, and the plug body is pushed to block the pipeline by the change of the pressure difference when dangerous abnormal motion occurs in the pipeline. When the working end is closed and the leakage port is closed, a chamber is formed between the working end and the outlet of the valve body (1), fluid is injected into the pressure releasing port (3), the pressure of the chamber rises, and the plug body is separated from the outlet of the valve body (1) to open a pipeline. Such fluids, including various flammable, explosive, hazardous, and other gases and liquids. The pipeline fluid self-plugging valve comprises a valve body (1), a plug body (2) and a pressure releasing port (3), wherein when a vertical installation method is adopted, a double-layer bracket (7) needs to be additionally installed in the valve body (1); when a horizontal installation method is adopted, a spring/tension spring (8) is additionally arranged between the plug body (2) and the pipeline wall.
Description
Technical Field
The invention relates to a self-blocking method for a pipeline fluid, in particular to a self-blocking method for an inflammable, explosive and dangerous pipeline when abnormal conditions occur in the transportation process.
The invention also relates to a pipeline fluid self-plugging valve which comprises a valve body (1), a plug body (2), a pressure releasing port (3), a bracket (7) or a tension spring (8).
Background
Generally, various flammable, explosive and dangerous goods are contained in the pipeline conveying fluid, leakage, overload at a working end and overpressure at an input end are easy to occur in the conveying process, once a dangerous case occurs, huge life and property losses are generated, potential risks in the pipeline fluid conveying process are prevented, and huge market and social requirements exist.
The gas self-closing valve is designed according to the working characteristics of a magnetic body, the risk potential of pipeline gas in family use is well solved, the working range of the product does not contain liquid, and the product is limited to some chemicals.
The high-temperature self-closing valve is arranged on the market, the loss caused by danger of pipeline gas in household use is well reduced through the temperature control design, the product starts to work under the condition that the indoor temperature is increased due to gas leakage and fire, and the advance prevention is not realized.
Disclosure of Invention
The invention aims to solve the problems of various flammable, explosive and dangerous goods, including the pipeline fluid self-plugging method and the pipeline fluid self-plugging valve for preventing the danger of various gases and liquids in pipeline transportation in advance, controlling the danger in the process and recovering the danger after the process.
The flowing fluid has certain pressure intensity, so that pressure difference is formed on the plug body (2) in the pipeline, and the plug body can be pushed to move when the pressure difference reaches a certain value.
Drawings
The invention will be further described with reference to the accompanying drawings and embodiments thereof
Fig. 1 shows a perspective view of the construction of the piping fluid self-plugging valve of the present invention.
In order to achieve the related objective, the pipeline fluid self-plugging method of the invention is described as follows by taking pipeline fuel gas as an example:
a fluid self-plugging valve of a pipeline is vertically installed,
the pressure of supplied gas is 3000 pascal, the area of the pipeline is 0.00015 square meter, the projection area of the front surface of the plug body is 0.00075 square meter,
the pressure difference of the plug body (2) during normal operation can be adjusted to 600 Pa by adjusting the minimum sectional area of the fluid passing between the plug body (2) and the valve body (1), the outlet of the pipeline fluid self-plugging valve is plugged when the pressure difference of the plug body (2) reaches 800 Pa,
and when the device normally works, the pressure difference consumed by other parts and the working end is 2400-2200 pascals, wherein the working pressure difference of the working end is 1200-1600 pascals.
The design of the pipeline fluid self-plugging valve also needs to consider the influence of fluid mechanics, the structural design adopted by the valve body (1) and the structural design adopted by the plug body (2) are beneficial to reducing the complexity brought by the fluid mechanics to the design, the evaluation is not performed temporarily in the analysis of the following theoretical design, and the actual product design calculation is more complicated.
And calculating the weight of the plug body, wherein W =800 × 0.00075/9.8N/KG =0.6N/9.8N/KG =0.06KG (the weight of the plug body is feasible).
The gas has small specific gravity, and the influence of buoyancy is not calculated (the plug body volume is practical and feasible).
And (3) inputting overpressure risk control, calculating according to the unchanged distribution relation of pressure difference among the plug body (2), other components and the working end when the pressure of the supplied gas rises to 4000 pascals step by step, wherein the pressure difference of the plug body is 800 pascals, and continuously increasing the pressure of the supplied gas, so that the plug body (2) blocks the outlet of the pipeline fluid self-blocking valve.
The output loses the pressure risk control, when the gas pressure of gas supply is stable, the number of the working ends is gradually increased, the pressure difference of the working ends is gradually reduced, overload is generated, at the moment, 3000-pascal pressure difference is distributed by the plug body (2), other components (a gas pressure gauge, a gas meter and the like) and the working ends, and when the distribution relation is unchanged, the pressure difference of the working ends is distributed by the plug body (2) and the other components.
When the working end is assigned 1600, the plug body (2) is assigned 600 and the other components are assigned 800;
when the working end is distributed at 1200, the plug body (2) is distributed at 771, and other components are distributed at 1029;
and the distribution of the working end continues to descend, the distribution of the plug body (2) exceeds 800, and the plug body (2) blocks the outlet of the pipeline fluid self-blocking valve.
And (4) controlling leakage risks, wherein the leakage causes the pressure loss of a working end, when the pressure difference of the working end caused by the leakage is less than 1133, the pressure difference borne by the plug body (2) is more than 800, and the plug body (2) blocks the outlet of the pipeline fluid self-plugging valve.
Other components (a gas pressure gauge, a gas meter, etc.) are arranged in front of the pipeline fluid self-plugging valve, and the pipeline fluid self-plugging valve is arranged at a position close to the working end.
Whether the input end is in overpressure or the output end is in decompression, the pressure is suddenly increased, the pressure difference is not evenly distributed in each position within a short time, more pipeline fluid self-plugging valves are distributed by other parts at the front part at the starting time, and less pipeline fluid self-plugging valves are distributed at the back part, so that the transient response of the pipeline fluid self-plugging valves to the overpressure of the input end is reduced, and the tolerance of the pipeline fluid self-plugging valves to the overpressure of the input end is improved; when the pressure intensity of the output end is suddenly reduced, the distribution of the pressure difference at each position in a short time is not the average distribution, the pipeline fluid self-plugging valve is close to the working end, the distribution is more, and the sensitivity of the pipeline fluid self-plugging valve is improved.
After the plug body (2) blocks the outlet of the pipeline fluid self-plugging valve, the working end is closed, the leakage port is sealed, then a chamber is formed between the outlet and the working end, the release pressure port (3) continuously injects fuel gas into the chamber, the pressure of the chamber rises, the pressure difference borne by the plug body (2) falls, finally, the plug body (2) is separated from the outlet of the pipeline fluid self-plugging valve under the combined action of gravity and the pressure difference, and the outlet is opened again.
Calculating the leakage amount of the relief pressure port (3): assuming that the self-closing valve of the pipeline fluid is started for 0.25 hour and the chamber is filled, the self-closing valve can be started (actually, the chamber is not required to be filled completely and can be started automatically, and the amount of injected fluid is 73 percent of the chamber, the pressure releasing port (3) is released for 40 hours and the leakage port and the working end are closed.
Assuming that the total length of the pipeline from the pipeline fluid self-plugging valve to each working end is 10M, the known pipeline cross-sectional area is 0.00015 square meter,
the amount of leakage from the pressure relief port was calculated as V =40 hours/0.25 hours × 10M × 0.00015.00015 square meter =0.24M3,
the natural gas density is 0.72KG/M3, about 0.17KG of leakage amount in 40 hours, and family kitchen ventilation is better, and the risk that the less leakage amount produced is little, and no matter the risk size user all should in time deal with relevant risk (prove that the leakage risk that the pressure port that releases produced is controllable).
In this way, it is possible to prevent danger in advance, control danger in the middle of the event, and recover danger later.
In order to achieve the aim, the pipeline fluid self-plugging valve comprises a valve body (1), a plug body (2) and a pressure releasing port (3),
when a vertical installation method is adopted, a double-layer bracket (7) is required to be arranged in the valve body;
the valve body (1) is a cylindrical hollow cylinder, the head part is thick and is a fluid outlet part, the tail part is thin and is a fluid inlet part, and the tail part is gradually reduced to the same size of a pipeline from thick to thin; the plug body (2) consists of a head part, a middle part and a tail part, the head part is a spherical surface body, the middle part is an outer convex arc line type cylinder from thick to thin, and the tail part is thin and is additionally provided with (3) blades; the head, the middle and the tail are connected in a uniform flow line manner.
When the plug body (2) is made of soft materials with high plasticity, the pressure release port (3) is formed in the pipe wall of the outlet of the valve body, the terminal point exceeds the bending position of the valve body by 2 mm and is a thin and long groove, and the pressure release port (3) is prevented from being blocked by the plug body (2); when the plug body (2) is made of harder material with smaller plasticity, the pressure release port (3) can be opened on the spherical surface at the head part of the plug body (2) and is a thin and long groove, the groove starts from the center of the spherical surface at the head part of the plug body (2), the terminal point exceeds the edge of the spherical surface at the head part of the plug body (2) and is folded to the middle part of the plug body (2) by 2 millimeters, and when the outlet is blocked by the plug body (2), the pressure release port is formed; the size of the pressure release port (3) is determined according to indexes such as the time for the pipeline fluid to recover from the blocking valve and open.
The influence on the buoyancy of the plug body (2) is large due to different fluids and different fluid densities, and the influence on the buoyancy of the plug body (2) in resisting and utilizing the weight of the plug body can be adjusted.
The fluids are different, the chemical properties of the fluids are different, the corrosivity of the plug body (2) made of different materials is different, and the plug body (2) is made of the material with the appropriate chemical property in a targeted mode.
The radius of the spherical surface of the head of the plug body (2) is the same as the arc radius of the outlet pipe wall of the valve body (1), so that the plug body (2) is better attached to the valve body (1) and helps the plug body (2) to align to the outlet of the valve body (1), and the plug body (2) can completely prevent the flow of fluid in a pipeline when blocking the outlet of the valve body (1).
The double-layer bracket (7) mainly plays a role in supporting the plug body (2) and forming pressure difference by the bracket close to the head, the gravity center of the plug body (2) can be stabilized by the bracket behind the double-layer bracket, the plug body (2) is prevented from swinging, the double-layer bracket can ensure that the plug body (2) is aligned with the outlet of the valve body (1), and the action is accurately finished.
The pipeline fluid self-plugging valve can be installed vertically or horizontally, when the pipeline fluid self-plugging valve is installed horizontally, a tension spring or a spring (8) needs to be installed between the plug body (2) and the valve body (1), and resistance generated when the tension spring is stretched or the spring is compressed is balanced with thrust borne by the plug body (2).
Claims (6)
1. A self-plugging method for pipeline fluid comprises the following steps:
when the pipeline is vertically installed, a balance is formed among the gravity of the plug body, the pressure difference of the fluid to the plug body and the buoyancy; when the pipeline is horizontally installed, a spring/tension spring is additionally arranged between the plug body and the wall of the pipeline to form pushing force/pulling force, and the pushing force/pulling force and the pressure difference of the fluid to the plug body form balance;
the pressure at the inlet end of the pipeline rises, the pressure distributed by the plug body rises, the pressure difference becomes large, and when the pressure difference reaches a set value, the plug body blocks the outlet; the pressure at the outlet end of the pipeline is reduced, the pressure distributed by the plug body is increased, the pressure difference is increased, and when the pressure difference reaches a set value, the plug body blocks the outlet;
the plug body blocks the outlet, a pressure releasing outlet is reserved between the plug body and the pipeline wall of the outlet, the working end is closed, the leakage port is closed, a bin is formed between the working end and the outlet end, fluid is continuously injected into the bin through the pressure releasing outlet, the pressure of the bin rises, the pressure difference applied to the plug body continuously drops, and the plug body is separated from the outlet.
2. A method of self-plugging a pipeline fluid according to claim 1, wherein: such fluids include various flammable, explosive, and hazardous gases and liquids.
3. A method of self-plugging a pipeline fluid according to claim 1, wherein: the inlet end of the pipeline gradually increases the pressure intensity, the pressure intensity difference distributed by each section of the pipeline gradually increases, the distribution relation of the pressure intensity difference between the plug body and each section is stable, the inlet end of the pipeline suddenly increases the pressure intensity, the pressure intensity difference distributed by the plug body suddenly increases, the pressure intensity difference distributed by the outlet end increases after pressing, and the wave crest phenomenon is beneficial to improving the sensitivity of the plug body; the pressure intensity of the outlet end of the pipeline is gradually reduced, the pressure intensity difference distributed by each section of the pipeline is gradually improved, the pressure intensity difference matching relation between the plug body and each section is stable, the pressure intensity of the outlet end of the pipeline is suddenly reduced, the pressure intensity difference distributed by the plug body is suddenly increased, the distributed pressure intensity difference at the inlet end is increased after being extruded, and the wave trough phenomenon is beneficial to improving the sensitivity of the plug body.
4. A self-plugging valve for pipeline fluid for realizing the method of claim 1 or 2, which comprises a valve body (1), a plug body (2) and a pressure relief port (3), and is characterized in that the valve body (1) is a cylindrical hollow cylinder, the head part is a fluid outlet part, the tail part is a fluid inlet part, and the tail part is gradually reduced to the same size of the pipeline from thick to thin; the plug body consists of a head part (4), a middle part (5) and a tail part (6), wherein the head part is a spherical surface body, the middle part is an outer arc line type cylinder from thick to thin, and the tail part is thin and is additionally provided with (3) blades; the head, the middle and the tail are connected in a uniform flow line manner; the pressure releasing port is arranged on the pipe wall of the outlet of the valve body (1) and is very thin, and the size of the pressure releasing port is determined according to indexes such as the time for the pipeline fluid to restore from the blocking valve and the like.
5. The pipeline fluid self-plugging valve according to claim 4 wherein: the pipeline fluid self-closing valve is vertically installed and is vertical to the horizontal direction, a bracket (7) is installed at the head of the valve body (1), and the plug body (2) is supported by the bracket (7).
6. The pipeline fluid self-plugging valve according to claim 4 wherein: the pipeline fluid self-plugging valve is horizontally installed and is parallel to the horizontal direction, and a spring/tension spring (8) is additionally installed between the plug body (2) and the pipeline wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010310427.7A CN111350855A (en) | 2020-04-22 | 2020-04-22 | Self-plugging method and self-plugging valve for pipeline fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010310427.7A CN111350855A (en) | 2020-04-22 | 2020-04-22 | Self-plugging method and self-plugging valve for pipeline fluid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111350855A true CN111350855A (en) | 2020-06-30 |
Family
ID=71194943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010310427.7A Pending CN111350855A (en) | 2020-04-22 | 2020-04-22 | Self-plugging method and self-plugging valve for pipeline fluid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111350855A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2416303Y (en) * | 2000-01-25 | 2001-01-24 | 山东小鸭电器股份有限公司 | Duplex one-way ball valve |
| TWM270290U (en) * | 2004-09-29 | 2005-07-11 | Huan Gu Entpr Co Ltd | Check valve |
| CN102401160A (en) * | 2011-08-09 | 2012-04-04 | 汪砚秋 | Conical core pressure difference one-way valve |
| CN105257831A (en) * | 2015-10-29 | 2016-01-20 | 重庆迎瑞升压铸有限公司 | Cam type torpedo vacuum valve for die casting |
| CN109114434A (en) * | 2018-09-03 | 2019-01-01 | 蒋晓武 | A kind of gas pipeline leak detecting and alarming device with emergency cut-off |
| CN209458448U (en) * | 2018-08-10 | 2019-10-01 | 盐城工学院 | A belt pass safety valve applied to gas transportation pipeline |
| CN212899932U (en) * | 2020-04-22 | 2021-04-06 | 周睿 | Self-blocking valve for pipeline fluid |
-
2020
- 2020-04-22 CN CN202010310427.7A patent/CN111350855A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2416303Y (en) * | 2000-01-25 | 2001-01-24 | 山东小鸭电器股份有限公司 | Duplex one-way ball valve |
| TWM270290U (en) * | 2004-09-29 | 2005-07-11 | Huan Gu Entpr Co Ltd | Check valve |
| CN102401160A (en) * | 2011-08-09 | 2012-04-04 | 汪砚秋 | Conical core pressure difference one-way valve |
| CN105257831A (en) * | 2015-10-29 | 2016-01-20 | 重庆迎瑞升压铸有限公司 | Cam type torpedo vacuum valve for die casting |
| CN209458448U (en) * | 2018-08-10 | 2019-10-01 | 盐城工学院 | A belt pass safety valve applied to gas transportation pipeline |
| CN109114434A (en) * | 2018-09-03 | 2019-01-01 | 蒋晓武 | A kind of gas pipeline leak detecting and alarming device with emergency cut-off |
| CN212899932U (en) * | 2020-04-22 | 2021-04-06 | 周睿 | Self-blocking valve for pipeline fluid |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2021307402B2 (en) | Gaseous fueling system | |
| CN212899932U (en) | Self-blocking valve for pipeline fluid | |
| CN108895474A (en) | A kind of surplus coal gas automatic relief system | |
| CN100507331C (en) | Differential pressure automatic shut-off valve | |
| CN111350855A (en) | Self-plugging method and self-plugging valve for pipeline fluid | |
| CN113466056B (en) | Pressure loading system for high-temperature bulge test of miniature metal test piece | |
| CN215374898U (en) | Pressure loading system for micro metal test piece high-temperature bulging test | |
| CN208761373U (en) | Explosion-proof fluid reservoir | |
| CN103499427B (en) | vacuum plume effect experiment system alcohol/kerosene system | |
| CN101326353A (en) | Device for eliminating momentary pressure peaks in rigid fluid systems | |
| GB2231697A (en) | Valve assembly | |
| CN109973692B (en) | Pressure-reducing and stabilizing starting valve for fire control | |
| CN216715372U (en) | Pneumatic ball valve cuts off fast | |
| CN108869822A (en) | The stop valve that timing is closed when less than certain flow | |
| CN205446876U (en) | Magnetic valve device | |
| CN108426071A (en) | The synergistic formula nonflame explosion venting device of series connection | |
| CN213630554U (en) | Liquid fuel combustion safety system | |
| CN206419537U (en) | A kind of pressure regulator and fuel gas transmission equipment | |
| CN215059665U (en) | Novel high liquid level cut-off valve for storage tank | |
| CN212156002U (en) | Cascadable pressure reducing device and cascade system | |
| CN110870959A (en) | Automatic exhaust type fire damper for positive pressure cabinet | |
| CN221097589U (en) | Self-closing liquid taking valve of liquefied petroleum gas intrinsically safe mechanical linkage | |
| CN222950823U (en) | Control valve for liquefied petroleum gas | |
| CN223020003U (en) | An online additive system for oil blending | |
| CN222950834U (en) | Liquefied hydrocarbon spherical tank safety water injection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |