CN2787946Y - Quick shut-off butterfly valve - Google Patents
Quick shut-off butterfly valve Download PDFInfo
- Publication number
- CN2787946Y CN2787946Y CN 200520088883 CN200520088883U CN2787946Y CN 2787946 Y CN2787946 Y CN 2787946Y CN 200520088883 CN200520088883 CN 200520088883 CN 200520088883 U CN200520088883 U CN 200520088883U CN 2787946 Y CN2787946 Y CN 2787946Y
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- China
- Prior art keywords
- hydraulic cylinder
- butterfly valve
- diameter
- auxiliary
- accumulator
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- Expired - Fee Related
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Abstract
The utility model relates to a butterfly quick-closing valve which is provided with a butterfly valve, wherein a valve rod of the butterfly valve is connected with an opening hydraulic cylinder through a driving device, and the opening hydraulic cylinder is used for driving the opening of the butterfly valve; the opening hydraulic cylinder is connected with an elastic energy accumulator, and cylinder barrels of the opening hydraulic cylinder are a main hydraulic cylinder barrel and an auxiliary hydraulic cylinder barrel. The length and the diameter of the auxiliary hydraulic cylinder barrel are smaller than the length and the diameter of the main hydraulic cylinder barrel, and axes of the main hydraulic cylinder barrel and the auxiliary hydraulic cylinder barrel are positioned on a same straight line. The auxiliary hydraulic cylinder is arranged at one end of the main hydraulic cylinder. Pistons of the opening hydraulic cylinder are a main piston and an auxiliary piston which are respectively matched with the main hydraulic cylinder and the auxiliary hydraulic cylinder. One end of the auxiliary hydraulic cylinder barrel is provided with an inlet and an outlet of a main oil path, and the main hydraulic cylinder barrel is provided with an inlet and an outlet of an auxiliary oil path at one end which is connected with the auxiliary hydraulic cylinder barrel. The areas of the inlet and the outlet of the auxiliary oil path are smaller than the areas of the inlet and the outlet of the main oil path, and the inlet and the outlet of the auxiliary oil path are connected with the inlet and the outlet of the main oil path through regulating valves. The elastic energy accumulator of the utility model is used as a quick-closing driving device, and is used for supplying the closing driving force when the butterfly valve is closed, therefore the butterfly valve can be closed quickly according to the requirement.
Description
Technical field
The utility model relates to a kind of quick shutoff butterfly valve.
Background technique
The steam that thermoelectricity plant could generate electricity and export elevated pressures provides heat to the user.In thermoelectricity plant, the high pressure steam that boiler produces passes through steam turbine earlier, part energy drives steam turbine and rotates the drive generator for electricity generation, the pressure that discharge from the steam turbine tail end generating back decreases but still steam with elevated pressures of certain energy, and the pipeline by heating system offers the user and uses.In this heating system, when the boiler in the thermoelectricity plant or steam turbine meet accident fault, when causing pressure in boiler or the steam turbine to reduce, the steam of the elevated pressures of user's one end can oppositely flow back to steam turbine along the pipeline of heating system, steam turbine is caused reverse impact, steam turbine is wrecked because of reverse impact.In order to prevent the opposing steam flow of user's one end elevated pressures, in the prior art, have at the pipeline of heating system and settle safety check, safety check generally has the hydraulic driving opening device, but there is not the drive unit of shutoff fast, just rely on and reflux Shuttoff Valve, boiler in thermoelectricity plant or the steam turbine fault that meets accident, pressure in boiler or the steam turbine reduces, the steam of the elevated pressures of user's one end along the pipeline reverse flow of heating system when the steam turbine, safety check is not because there is the drive unit of shutoff fast, can not turn-off fast, because the safety check shutoff is untimely, the steam of the elevated pressures of user's one end still can be back in the steam turbine steam turbine is damaged sometimes.
Summary of the invention
The purpose of this utility model is in order to overcome above-mentioned deficiency, to propose a kind of butterfly valve with quick shutoff drive unit.
The utility model is realized with the following method.
Turn-off butterfly valve fast butterfly valve is arranged, the valve rod of butterfly valve is connected with by transmission device and drives the unlatching oil hydraulic cylinder that butterfly valve is opened usefulness, open oil hydraulic cylinder and be connected with the elasticity accumulator, the cylinder barrel of opening oil hydraulic cylinder has master hydraulic cylinder tube and secondary hydraulic cylinder, the diameter of master hydraulic cylinder tube is greater than the diameter of secondary hydraulic cylinder, the diameter of master hydraulic cylinder tube and the diameter ratio of secondary hydraulic cylinder are less than or equal to 10, the axis of master hydraulic cylinder tube and secondary hydraulic cylinder is on same straight line, secondary oil hydraulic cylinder is at an end of master hydraulic cylinder, master hydraulic cylinder tube and secondary hydraulic cylinder communicate, the piston of opening oil hydraulic cylinder have the main piston that matches with the master hydraulic cylinder tube respectively and with the gapped sub-piston that cooperates of secondary hydraulic cylinder, an end of secondary hydraulic cylinder has working connection to import and export.
The shutoff butterfly valve is installed in thermoelectricity plant fast provides to the user on the heating system pipeline of elevated pressures steam, and working connection is imported and exported and is connected with hydraulic station.
During use, start hydraulic station and drive the unlatching oil hydraulic cylinder promotes butterfly valve by transmission device valve rod opened butterfly valve, and make butterfly valve be held open state with hydraulic pressure, at this moment, sub-piston leaves secondary hydraulic cylinder, in the valve rod of opening the cylinder pushes butterfly valve, make the elasticity accumulator under hydraulic pressure, keep energy accumulating state.Pressure in the boiler in the thermoelectricity plant or steam turbine meet accident fault, boiler or steam turbine reduces, the steam of the elevated pressures of user's one end is along the pipeline reverse flow of heating system during to steam turbine, because of backflow signal hydraulic station stops to drive, the energy of elasticity accumulator discharges fast, the piston returning quickly turn-offs butterfly valve fast.At the piston return, in the process that butterfly valve turn-offs fast, overwhelming majority oil is imported and exported by working connection and is flow back into hydraulic station fast in the master hydraulic cylinder tube, in the later stage of piston returning quickly, sub-piston enters secondary hydraulic cylinder, a small amount of oil in the master hydraulic cylinder tube can only flow back to hydraulic station by the gap between sub-piston and the secondary hydraulic cylinder, because the gap throttling action between sub-piston and the secondary hydraulic cylinder, piston reduces in the later stage of returning quickly speed, make butterfly valve in quick turn off process, valve plate is finished overwhelming majority pass apace and is had no progeny, when the periphery of valve plate makes butterfly valve near shutoff near valve body, turn-off speed lowers, and prevents that the sealing pair between valve plate and valve body from damaging when turn-offing fast.
Elasticity accumulator of the present utility model is as the quick shutoff drive unit of butterfly valve; when butterfly valve closing, can provide the shutoff driving force; butterfly valve can be turn-offed when needed fast; owing to open oil hydraulic cylinder bigger master hydraulic cylinder tube of diameter and the less secondary hydraulic cylinder of diameter are arranged; piston have the main piston that matches with master hydraulic cylinder respectively and with the gapped sub-piston that cooperates of secondary oil hydraulic cylinder; later stage that butterfly valve turn-offs fast because of the gap throttling, turn-off speed is lowered, the protection sealing pair is not damaged.
Below in conjunction with accompanying drawing, the utility model is further described.
Description of drawings
Fig. 1 is that schematic representation cuts open in the master office of looking of turn-offing butterfly valve fast;
Fig. 2, Fig. 3 are that the elasticity accumulator is that schematic representation cuts open in the master office of looking of helical spring quick shutoff butterfly valve;
Fig. 4 is that schematic representation cuts open in quick shutoff butterfly valve master the look office of helical spring in hydraulic cylinder.
Embodiment
Among Fig. 1, turn-off butterfly valve fast butterfly valve 1 is arranged, the valve rod 2 of butterfly valve is connected with by transmission device 3 and drives the unlatching oil hydraulic cylinder 4 that butterfly valve is opened usefulness, open oil hydraulic cylinder and be connected with elasticity accumulator 5, the cylinder barrel 6 of opening oil hydraulic cylinder has master hydraulic cylinder tube 7 and secondary hydraulic cylinder 8, the diameter of master hydraulic cylinder tube is greater than the diameter of secondary hydraulic cylinder, the diameter of master hydraulic cylinder tube and the diameter ratio of secondary hydraulic cylinder are less than or equal to 5, the axis of master hydraulic cylinder tube and secondary hydraulic cylinder is on same straight line, secondary oil hydraulic cylinder is at an end of master hydraulic cylinder, master hydraulic cylinder tube and secondary hydraulic cylinder communicate, the piston 9 of opening oil hydraulic cylinder have the main piston 10 that matches with the master hydraulic cylinder tube respectively and with the gapped sub-piston that cooperates 11 of secondary hydraulic cylinder, an end of secondary hydraulic cylinder has working connection to import and export 12.
Above-mentioned elasticity accumulator can be that bladder accumulator also can be a piston accumulator.
Above-mentioned elasticity accumulator also can be the helical spring type accumulator.The helical spring type accumulator has the helical spring telescopic guide.Telescopic guide can be the cylindrical shape guide cylinder, and helical spring is in guide cylinder.
Among Fig. 2, Fig. 3, the elasticity accumulator that turn-offs butterfly valve fast is a helical spring type accumulator 15, and the helical spring type accumulator has the helical spring guide cylinder 16 that stretches, and helical spring 17 is arranged in the guide cylinder.
Above-mentioned helical spring type accumulator is what to separate with opening oil hydraulic cylinder, and the flexible guide cylinder of helical spring also can be the cylinder that links to each other with opening hydraulic cylinder.
Among Fig. 4, the flexible guide cylinder of helical spring that turn-offs the helical spring type accumulator of butterfly valve fast is the cylinder 18 that links to each other with opening hydraulic cylinder.
Above-mentioned quick shutoff butterfly valve is in the later stage of turn-offing fast, be with the gap throttling action between sub-piston and the secondary hydraulic cylinder, piston is reduced in the later stage of returning quickly speed, and the gap between sub-piston and the secondary hydraulic cylinder is can not regulating of fixing, and the size of throttling action can not be regulated.For the size that makes throttling action can be regulated, there is auxiliary oil circuit to import and export at the end that links to each other with secondary hydraulic cylinder of master hydraulic cylinder tube.
Among Fig. 1, Fig. 2, Fig. 3 and Fig. 4, end that links to each other with secondary hydraulic cylinder at the master hydraulic cylinder tube has auxiliary oil circuit to import and export 13, auxiliary oil circuit is imported and exported by modulating valve 14 and is linked to each other with the working connection import and export, the diameter that working connection is imported and exported greater than auxiliary oil circuit import and export diameter, the diameter that working connection is imported and exported and auxiliary oil circuit import and export diameter ratio be less than or equal to 100.Regulate the aperture of above-mentioned modulating valve, the throttling action size in the time of can being adjusted in valve plate near valve body, the turn-off speed when promptly being adjusted in valve plate near valve body.
Gap between diameter, sub-piston and the secondary hydraulic cylinder that diameter that the length of above-mentioned master hydraulic cylinder tube and secondary hydraulic cylinder and diameter, working connection are imported and exported and auxiliary oil circuit are imported and exported, this professional those of ordinary skill can be determined with the time requirement of turn-offing fast at an easy rate according to the characteristic of butterfly valve.
Claims (6)
1. one kind is turn-offed butterfly valve fast, butterfly valve is arranged, the valve rod of butterfly valve is connected with by transmission device and drives the unlatching oil hydraulic cylinder that butterfly valve is opened usefulness, it is characterized in that: open oil hydraulic cylinder and be connected with the elasticity accumulator, the cylinder barrel of opening oil hydraulic cylinder has master hydraulic cylinder tube and secondary hydraulic cylinder, the diameter of master hydraulic cylinder tube is greater than the diameter of secondary hydraulic cylinder, the diameter of master hydraulic cylinder tube and the diameter ratio of secondary hydraulic cylinder are less than or equal to 10, the axis of master hydraulic cylinder tube and secondary hydraulic cylinder is on same straight line, secondary oil hydraulic cylinder is at an end of master hydraulic cylinder, master hydraulic cylinder tube and secondary hydraulic cylinder communicate, the piston of opening oil hydraulic cylinder have the main piston that matches with the master hydraulic cylinder tube respectively and with the gapped sub-piston that cooperates of secondary hydraulic cylinder, an end of secondary hydraulic cylinder has working connection to import and export.
2. by the described quick shutoff butterfly valve of claim 1, it is characterized in that: an end that links to each other with secondary hydraulic cylinder of described master hydraulic cylinder tube has auxiliary oil circuit to import and export, the diameter that working connection is imported and exported greater than auxiliary oil circuit import and export diameter, auxiliary oil circuit is imported and exported to import and export with working connection by modulating valve and is linked to each other, diameter that working connection is imported and exported and auxiliary oil circuit import and export diameter ratio be less than or equal to 100.
3. by claim 1 or 2 described quick shutoff butterfly valves, it is characterized in that: described elasticity accumulator is bladder accumulator or piston accumulator.
4. by claim 1 or 2 described quick shutoff butterfly valves, it is characterized in that: described elasticity accumulator is the helical spring type accumulator, and the helical spring type accumulator has the helical spring guide cylinder that stretches, and helical spring is arranged in the guide cylinder.
5. by the described quick shutoff butterfly valve of claim 4, it is characterized in that: the guide cylinder of described helical spring type accumulator is what to separate with opening hydraulic cylinder.
6. by the described quick shutoff butterfly valve of claim 4, it is characterized in that: the guide cylinder of described helical spring type accumulator links to each other with the unlatching hydraulic cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520088883 CN2787946Y (en) | 2005-01-11 | 2005-01-11 | Quick shut-off butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520088883 CN2787946Y (en) | 2005-01-11 | 2005-01-11 | Quick shut-off butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2787946Y true CN2787946Y (en) | 2006-06-14 |
Family
ID=36786241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520088883 Expired - Fee Related CN2787946Y (en) | 2005-01-11 | 2005-01-11 | Quick shut-off butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2787946Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103807490A (en) * | 2014-01-15 | 2014-05-21 | 同济大学 | Gas-liquid linkage fast-closing valve system |
| CN108953738A (en) * | 2018-07-12 | 2018-12-07 | 温州大学激光与光电智能制造研究院 | The control method of dual-valve body apparatus system |
-
2005
- 2005-01-11 CN CN 200520088883 patent/CN2787946Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103807490A (en) * | 2014-01-15 | 2014-05-21 | 同济大学 | Gas-liquid linkage fast-closing valve system |
| CN103807490B (en) * | 2014-01-15 | 2016-04-20 | 同济大学 | A kind of gas-liquid linked fast valve door system |
| CN108953738A (en) * | 2018-07-12 | 2018-12-07 | 温州大学激光与光电智能制造研究院 | The control method of dual-valve body apparatus system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060614 Termination date: 20110111 |