CN107806522B - Steam extraction type quick-closing check valve and working method thereof - Google Patents
Steam extraction type quick-closing check valve and working method thereof Download PDFInfo
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- CN107806522B CN107806522B CN201711196854.1A CN201711196854A CN107806522B CN 107806522 B CN107806522 B CN 107806522B CN 201711196854 A CN201711196854 A CN 201711196854A CN 107806522 B CN107806522 B CN 107806522B
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- 238000000605 extraction Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims description 6
- 238000007789 sealing Methods 0.000 claims description 45
- 230000009471 action Effects 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 4
- 239000013589 supplement Substances 0.000 claims description 3
- 230000010354 integration Effects 0.000 abstract description 2
- 230000007704 transition Effects 0.000 description 5
- 230000006378 damage Effects 0.000 description 3
- 238000005507 spraying Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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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
- F16K15/00—Check valves
- F16K15/18—Check valves with actuating mechanism; Combined check valves and actuated valves
- F16K15/182—Check valves with actuating mechanism; Combined check valves and actuated valves with actuating mechanism
- F16K15/1821—Check valves with actuating mechanism; Combined check valves and actuated valves with actuating mechanism for check valves with a hinged or pivoted closure member
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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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
- F16K31/1221—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston one side of the piston being spring-loaded
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- Mechanical Engineering (AREA)
- Check Valves (AREA)
- Control Of Turbines (AREA)
Abstract
The invention discloses a steam extraction type quick-closing check valve which comprises a check valve, an oil cylinder assembly and a control rod which are connected with each other, wherein the check valve comprises a valve seat, a main air inlet, a valve cover, an air outlet, a valve disc and a valve rod, the front end of the valve rod is connected with the lower end of the valve and the lower end of the control rod, the oil cylinder assembly comprises a cylinder body, a main oil inlet, a quick-closing control device, a piston rod, a piston and a piston spring, the rear end of the piston rod is connected with the piston, the cylinder body is fixed on the valve cover, the front end of the piston rod is connected with the rear end of the valve rod, the quick-closing control device is provided with a quick-closing oil inlet, the quick-closing oil inlet and the piston rod are positioned on the side, close to the valve rod. The steam valve can be used for realizing integration of quick closing and non-return, has a compact structure and low price, can realize steam balance, has good use stability, and ensures quick closing reliability.
Description
Technical Field
The invention relates to a valve, in particular to a steam extraction type quick-closing check valve and a working method thereof.
Background
The check valve (also called check valve) is a valve which automatically opens and closes a valve clack by the flowing of a medium and is used for preventing the medium from flowing backwards, so that the closing process of the check valve needs to be rapid and reliable; at present, the check valve and the quick-closing control device are difficult to combine in the domestic technology, the quick-closing check valve is imported from abroad, and the quick-closing check valve imported from abroad is expensive in price, complex in structure, difficult to match with internal steam turbines, incapable of achieving steam balance, not high in stability during use and incapable of ensuring that the check valve can be closed quickly and thoroughly.
Disclosure of Invention
In order to overcome the defects and shortcomings in the prior art, the invention provides the steam extraction type quick-closing check valve which can realize integration of quick closing and check, has a compact structure and low price, can realize steam balance, has good use stability and ensures quick and reliable closing, and the working method thereof.
The technical scheme of the invention is as follows: a steam extraction type quick-closing check valve comprises a check valve, an oil cylinder assembly and a control rod which are connected with each other, wherein the check valve comprises a valve seat, a main air inlet arranged on one side of the valve seat, a valve cover arranged on the other side of the valve seat, an air outlet arranged at the bottom of the valve seat, a valve arranged at the main air inlet, a valve disc and a valve rod arranged on the valve cover, the front end of the valve rod is connected with the lower end of the valve and the control rod, the oil cylinder assembly comprises a cylinder body, a main oil inlet and a quick-closing control device arranged on the cylinder body, and a piston rod, a piston and a piston spring arranged in the cylinder body, the rear end of the piston rod is connected with the piston, the cylinder body is fixed on the valve cover, the front end of the piston rod is connected with the rear end of the valve rod, the quick-closing control device is provided with a quick-closing oil inlet, the quick-closing oil inlet and, and the valve cover is provided with an auxiliary air inlet which is positioned on the side of the valve disc far away from the valve.
The quick-closing control device is matched with the oil cylinder assembly to drive the valve rod of the check valve to act to open the valve and quickly close the valve, so that the quick-closing and check valve can be integrated, the structure is compact, the price is low, the steam balance can be realized, the use stability is good, the quick-closing reliability of the valve is ensured, the interchangeability is strong, and the utilization rate is high.
Preferably, the front end of the valve rod is provided with a spherical journal, the valve is provided with a hemispherical groove matched with the spherical journal, the spherical journal is tightly covered by a flange cover after being arranged in the hemispherical groove, and the lower end of the control rod is arranged outside the flange cover and locked by a locking nut.
The structure ensures the firmness of connection between the valve rod and the valve, thereby ensuring the stability of the valve rod for driving the valve to open and close.
Preferably, the valve cover is connected with the cylinder body through a connecting block, the quick-closing control device is installed on the connecting block, an oil way matched with the quick-closing control device is arranged in the connecting block, and a first sealing sleeve is arranged between the connecting block and the piston rod.
The structure facilitates the installation and the action of the quick-closing control device, and ensures the installation firmness of the oil cylinder assembly, thereby ensuring the sealing performance of the piston rod and the connecting block.
Preferably, a sealing cover is arranged at the end, connected with the valve seat, of the valve cover, a bushing is arranged between the sealing cover and the valve rod, a limiting disc is arranged in the middle of the valve cover, a second sealing sleeve is arranged between the limiting disc and the valve rod, and the valve disc is located between the sealing cover and the limiting disc.
The sealing cover, the valve disc and the limiting disc have the following functions: in case of damage to the sealing part of the oil cylinder and leakage of oil, the sealing part can block oil from spraying to high temperature part; and the valve rod gap is blocked from leaking steam to the oil cylinder.
Preferably, the valve disc is locked with the valve rod through a 1-type hexagon nut and an adjusting screw, a flexible graphite ring is arranged between the limiting disc and the valve rod, and the flexible graphite ring is compressed through a compression nut.
The structure further ensures the connection firmness and the sealing performance of the valve disc and the valve rod and the sealing performance between the limiting disc and the valve rod.
Preferably, the left side of the limiting disc is provided with a sleeve mounting section matched with the second sealing sleeve, and the right side of the limiting disc is provided with a nut mounting section matched with the compression nut; the piston rod is connected with the valve rod through a coupler, and the coupler is located between the limiting disc and the connecting block.
The structure further ensures the connection firmness of the limiting disc and the valve cover and the connection firmness between the valve rod and the piston rod.
Preferably, the middle part of the cylinder body is provided with a spring seat matched with the piston spring, and the piston spring comprises a left outer ring spring, a left middle ring spring, a left inner ring spring, a right outer ring spring, a right middle ring spring and a right inner ring spring, wherein the left outer ring spring, the left middle ring spring and the left inner ring spring are positioned on the left side of the spring seat, and the right outer ring spring, the right.
The structure ensures the installation firmness and the action stability of the piston spring.
Preferably, the valve cover comprises a valve seat connecting section and a connecting block connecting section, the limiting disc is located between the valve seat connecting section and the connecting block connecting section, the valve seat connecting section comprises an inserting section, a mounting section and a transition section, and the auxiliary air inlet is located on the transition section.
The structure ensures the firmness of connection between the valve cover and the valve seat and between the valve cover and the oil cylinder.
Preferably, be equipped with check valve and balanced pipe on the vice air inlet, the check valve passes through the coupling and connects the intake pipe, vice air inlet slope sets up, and vice air inlet top is equipped with a stopper, be equipped with the sealing washer between stopper and the vice air inlet.
When the air inlet valve is opened, steam reaches the piston through the balance pipe and is balanced with the outside, the opening force is reduced, when the air inlet valve is closed, the steel ball falls through the check valve, the closing speed is ensured, and the air inlet stability and the reliability of the auxiliary air inlet are ensured by the structure.
When the quick-closing check valve is not opened, oil entering from a main oil inlet is positioned on the right side of an oil cylinder piston, an auxiliary piston spring closes the quick-closing check valve, steam enters a steam extraction pipe network after acting through a steam turbine and is communicated to a main air inlet on the left side of a valve in the horizontal direction, meanwhile, the steam enters the right side of a piston disc through a one-way valve of an auxiliary air inlet, the valve is tightly pressed on a valve seat under the closing force of the piston spring and the steam force, and steam in a steam extraction pipe network is cut off;
2) when the steam turbine needs to extract or supplement steam, the quick-closing oil enters the oil cylinder to the left side of the piston through the quick-closing oil inlet, along with the slow establishment of oil pressure, the piston overcomes the closing force of a piston spring to drive the valve rod to slowly move rightwards, then the valve is opened under the action of the steam force of the left side chamber, and the steam enters an outlet steam extraction pipe network of the quick-closing check valve through the air outlet;
3) during or after the quick-closing check valve is opened, a part of steam leaks outwards along a gap between the valve rod and the sealing element in the second sealing sleeve; after the speed check valve is fully opened, the valve rod is tightly attached to the sealing surface of the second sealing sleeve, and the steam leakage of the valve rod is blocked;
4) closing the quick-closing check valve: when the steam compensation or the steam extraction is satisfied, the electromagnetic valve on the quick-closing control device is switched, the main oil inlet is filled with oil, the quick-closing check valve quickly closes the valve under the action of the closing force of the piston spring and the oil pressure, and the steam inlet is cut off.
The quick closing control device is matched with the oil cylinder assembly to drive the valve rod of the check valve to act to open the valve and quickly close the valve, so that the quick closing and check can be integrated, the structure is compact, the price is low, the steam balance can be realized, the use stability is good, and the quick closing reliability is ensured.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic side view of the present invention;
FIG. 3 is a schematic view of the interior of the cylinder body according to the present invention;
FIG. 4 is a schematic structural view of a valve cover according to the present invention;
in the figure, 1, a main air inlet, 2, an auxiliary air inlet, 3, a spherical journal, 4, a valve, 5, a control rod, 6, a valve seat, 7, a sealing cover, 8, a valve disc, 9, a valve rod, 10, a first sealing sleeve, 11, a compression nut, 12, a flexible graphite ring, 13.1-shaped hexagon nut, 14, a valve cover, 15, a main oil inlet, 16, a spring seat, 17, a piston, 18, a connecting block, 19, a quick-closing oil inlet, 20, a quick-closing control device, 21, a piston rod, 22, a coupler, 23, a flange cover, 24, an air outlet, 25, a limiting disc, 26, a sleeve mounting section, 27, a nut mounting section, 28, a cylinder body, 29, an adjusting screw, 30, a second sealing sleeve, 31, a plug, 32, a one-way valve, 33, an air inlet pipe, 34, a left outer ring spring, 35, a right outer ring spring, 36, a left middle ring spring, 37, a right middle ring spring, 39. the right inner ring spring, 40, an insertion section, 41, a mounting section, 42, a transition section and 43, a connecting block connecting section.
Detailed Description
The present invention will be described in further detail with reference to the attached drawings, but the present invention is not limited thereto.
As shown in fig. 1-4, a steam extraction type quick-closing check valve includes a check valve, a cylinder assembly and a control rod 5 connected to each other. The check valve comprises a valve seat 6, a main air inlet 1 arranged on one side of the valve seat 6, a valve cover 14 arranged on the other side of the valve seat 6, an air outlet 24 arranged at the bottom of the valve seat 6, a valve 4 arranged at the main air inlet 1, a valve disc 8 arranged on the valve cover 14 and a valve rod 9. The front end of the valve rod 9 is connected with the lower ends of the valve 4 and the control rod 5. The oil cylinder assembly comprises a cylinder body 28, a main oil inlet 15 and a speed-closing control device 20 which are arranged on the cylinder body 28, and a piston rod 21, a piston 17 and a piston spring which are arranged in the cylinder body 28. The rear end of the piston rod 21 is connected with the piston 17, the cylinder 28 is fixed on the valve cover 14, and the front end of the piston rod 21 is connected with the rear end of the valve rod 9. The quick-closing control device 20 is provided with a quick-closing oil inlet 19, the quick-closing oil inlet 19 and a piston rod 21 are positioned on the side, close to the valve rod 9, of the piston 17, the main oil inlet 15 and a piston spring are positioned on the side, far away from the valve rod 9, of the piston 17, the valve cover 14 is provided with an auxiliary air inlet 2, and the auxiliary air inlet 2 is positioned on the side, far away from the valve 4, of the valve disc 8. The front end of the valve rod 9 is provided with a ball journal 3, the valve 4 is provided with a hemispherical groove matched with the ball journal 3, the ball journal 4 is tightly covered by a flange cover 23 after being arranged in the hemispherical groove, and the lower end of the control rod 5 is arranged on the outer side of the flange cover 23 and is locked by a locking nut. The valve cover 14 is connected with the cylinder 28 through a connecting block 18, the quick-closing control device 20 is installed on the connecting block 18, an oil path matched with the quick-closing control device 20 is arranged in the connecting block 18, and a first sealing sleeve 10 is arranged between the connecting block 18 and the piston rod 21. The valve cover 14 is provided with a sealing cover 7 at the end connected with the valve seat 6, a bushing is arranged between the sealing cover 7 and the valve rod 9, the middle part of the valve cover 14 is provided with a limiting disc 25, a second sealing sleeve 30 is arranged between the limiting disc 25 and the valve rod 9, and the valve disc 8 is positioned between the sealing cover 7 and the limiting disc 25. The valve disc 8 is locked with the valve rod 9 through a 1-type hexagon nut 13 and an adjusting screw 29, a flexible graphite ring 12 is arranged between the limiting disc 25 and the valve rod 9, and the flexible graphite ring 11 is compressed through a compression nut 12. A sleeve mounting section 26 matched with the second sealing sleeve 30 is arranged on the left side of the limiting disc 25, and a nut mounting section 27 matched with the compression nut 11 is arranged on the right side of the limiting disc 25; the piston rod 21 is connected with the valve rod 9 through a coupling 22, and the coupling 22 is positioned between the limiting disc 25 and the connecting block 23. The middle part of the cylinder 28 is provided with a spring seat 16 matched with a piston spring, and the piston spring comprises a left outer ring spring 34, a left middle ring spring 36 and a left inner ring spring 38 which are positioned on the left side of the spring seat 16, and a right outer ring spring 35, a right middle ring spring 37 and a right inner ring spring 39 which are positioned on the right side of the spring seat 16. The valve cover 14 comprises a valve seat connecting section and a connecting block connecting section 43, the limiting disc 25 is located between the valve seat connecting section and the connecting block connecting section 43, the valve seat connecting section comprises an inserting section 40, a mounting section 41 and a transition section 42, and the auxiliary air inlet 2 is located on the transition section 42. Be equipped with check valve 32 and balance pipe on the vice air inlet 2, check valve 32 passes through the coupling and connects intake pipe 33, and vice air inlet 2 slope sets up, and is equipped with a stopper 31 at vice air inlet 2 top, is equipped with the sealing washer between stopper 31 and the vice air inlet 2.
When the quick-closing check valve is not opened, oil entering from a main oil inlet is positioned on the right side of an oil cylinder piston, an auxiliary piston spring closes the quick-closing check valve, steam enters a steam extraction pipe network after acting through a steam turbine and is communicated to a main air inlet on the left side of a valve in the horizontal direction, meanwhile, the steam enters the right side of a piston disc through a one-way valve of an auxiliary air inlet, the valve is tightly pressed on a valve seat under the closing force of the piston spring and the steam force, and steam in a steam extraction pipe network is cut off;
2) when the steam turbine needs to extract or supplement steam, the quick-closing oil enters the oil cylinder to the left side of the piston through the quick-closing oil inlet, along with the slow establishment of oil pressure, the piston overcomes the closing force of a piston spring to drive the valve rod to slowly move rightwards, then the valve is opened under the action of the steam force of the left side chamber, and the steam enters an outlet steam extraction pipe network of the quick-closing check valve through the air outlet;
3) during or after the quick-closing check valve is opened, a part of steam leaks outwards along a gap between the valve rod and the sealing element in the second sealing sleeve; after the speed check valve is fully opened, the valve rod is tightly attached to the sealing surface of the second sealing sleeve, and the steam leakage of the valve rod is blocked;
4) closing the quick-closing check valve: when the steam compensation or the steam extraction is satisfied, the electromagnetic valve on the quick-closing control device is switched, the main oil inlet is filled with oil, the quick-closing check valve quickly closes the valve under the action of the closing force of the piston spring and the oil pressure, and the steam inlet is cut off.
Some flange interfaces of the quick-closing check valve can be designed according to national standard, German standard or American standard according to the requirements of users; meanwhile, a stroke annunciator can be configured in an explosion-proof dangerous area or a safety area according to the requirements of users so as to determine the limit position of the operation of the oil cylinder.
The oil cylinder assembly is assembled and disassembled by disassembling and assembling bolts and nuts so as to avoid personal injury accidents. The check valve can be quickly closed as required, and is provided with a travel switch for sending corresponding signals at the closed and full-open positions of the valve. The valve disk fixed on the valve rod also has the following functions: in case of damage to the sealing part of the oil cylinder and leakage of oil, the sealing part can block oil from spraying to high temperature part; and the valve rod gap is blocked from leaking steam to the oil cylinder.
The quick-closing check valve of the invention has the following notes: 1. the quick-closing check valve must be installed strictly according to engineering drawings; 2. after the valve body is installed, no sundries are left in the valve body; 3. each fixing screw is screwed to prevent the mechanism from loosening or the sealing surface from leaking; 4. before steam extraction, the piston of the oil cylinder is confirmed to be at the top end (namely the valve rod is lifted to the top end); 5. the oil pressure of the oil cylinder is not less than 0.6 Mpa; 6. storage time: dry environment for 1 year, wet environment for half a year, out of time period needs inspection and repair is scheduled according to the results.
The fast closing control device in the present invention is a conventional fast closing control device, and therefore, will not be described in detail.
Claims (8)
1. The utility model provides a steam extraction formula fast closes check valve which characterized in that: the check valve comprises a check valve body, an oil cylinder assembly and a control rod which are connected with each other, wherein the check valve body comprises a valve seat, a main air inlet arranged on one side of the valve seat, a valve cover arranged on the other side of the valve seat, an air outlet arranged at the bottom of the valve seat, a valve arranged at the position of the main air inlet, a valve disc and a valve rod arranged on the valve cover, the front end of the valve rod is connected with the lower end of the valve and the control rod, the oil cylinder assembly comprises a cylinder body, a main oil inlet and a quick-closing control device arranged on the cylinder body, and a piston rod, a piston and a piston spring arranged in the cylinder body, the rear end of the piston rod is connected with the piston, the cylinder body is fixed on the valve cover, the front end of the piston rod is connected with the rear end of the valve rod, the quick-closing control device is provided with a quick-closing oil inlet, an auxiliary air inlet is formed in the valve cover and is positioned on the side, far away from the valve, of the valve disc; the front end of the valve rod is provided with a spherical shaft neck, the valve is provided with a hemispherical groove matched with the spherical shaft neck, the spherical shaft neck is tightly covered by a flange cover after being arranged in the hemispherical groove, and the lower end of the control rod is arranged on the outer side of the flange cover and is locked by a locking nut; the valve cover is connected with the cylinder body through a connecting block, the quick-closing control device is installed on the connecting block, an oil way matched with the quick-closing control device is arranged in the connecting block, and a first sealing sleeve is arranged between the connecting block and the piston rod.
2. The extraction type quick-closing check valve as claimed in claim 1, wherein: the valve comprises a valve cover and a valve seat, and is characterized in that a sealing cover is arranged at the connecting end of the valve cover and the valve seat, a bushing is arranged between the sealing cover and the valve rod, a limiting disc is arranged in the middle of the valve cover, a second sealing sleeve is arranged between the limiting disc and the valve rod, and the valve disc is located between the sealing cover and the limiting disc.
3. The extraction type quick-closing check valve as claimed in claim 2, wherein: the valve disc is locked with the valve rod through a 1-type hexagon nut and an adjusting screw, a flexible graphite ring is arranged between the limiting disc and the valve rod, and the flexible graphite ring is compressed through a compression nut.
4. The extraction type quick-closing check valve as claimed in claim 3, wherein: a sleeve mounting section matched with the second sealing sleeve is arranged on the left side of the limiting disc, and a nut mounting section matched with the compression nut is arranged on the right side of the limiting disc; the piston rod is connected with the valve rod through a coupler, and the coupler is located between the limiting disc and the connecting block.
5. The extraction type quick-closing check valve as claimed in claim 1, wherein: the piston spring comprises a left outer ring spring, a left middle ring spring, a left inner ring spring, a right outer ring spring, a right middle ring spring and a right inner ring spring, wherein the left outer ring spring, the left middle ring spring and the left inner ring spring are positioned on the left side of the spring seat, and the right outer ring spring, the right middle ring spring and the right inner ring spring are positioned on the right side of the spring seat.
6. The extraction type quick-closing check valve as claimed in claim 2, wherein: the valve gap includes disk seat linkage segment and connecting block linkage segment, spacing dish is located between disk seat linkage segment and the connecting block linkage segment, the disk seat linkage segment is including inserting section, installation section and changeover portion, vice air inlet is located the changeover portion.
7. The extraction type quick-closing check valve as claimed in claim 6, wherein: be equipped with check valve and balanced pipe on the vice air inlet, the check valve passes through the coupling and connects the intake pipe, vice air inlet slope sets up, and vice air inlet top is equipped with a stopper, be equipped with the sealing washer between stopper and the vice air inlet.
8. A method of operating the extraction type quick-closing check valve as defined in claim 1, wherein: 1) when the quick-closing check valve is not opened, oil entering from a main oil inlet is positioned on the right side of an oil cylinder piston, an auxiliary piston spring closes the quick-closing check valve, steam enters a steam extraction pipe network after acting through a steam turbine and is communicated to a main air inlet on the left side of a valve in the horizontal direction, meanwhile, the steam enters the right side of a piston disc through a check valve of an auxiliary air inlet, the valve is tightly pressed on a valve seat under the closing force of the piston spring and the steam force, and steam in the steam extraction pipe network is cut off;
2) when the steam turbine needs to extract or supplement steam, the quick-closing oil enters the oil cylinder to the left side of the piston through the quick-closing oil inlet, along with the slow establishment of oil pressure, the piston overcomes the closing force of a piston spring to drive the valve rod to slowly move rightwards, then the valve is opened under the action of the steam force of the left side chamber, and the steam enters an outlet steam extraction pipe network of the quick-closing check valve through the air outlet;
3) during or after the quick-closing check valve is opened, a part of steam leaks outwards along a gap between the valve rod and the sealing element in the second sealing sleeve; after the speed check valve is fully opened, the valve rod is tightly attached to the sealing surface of the second sealing sleeve, and the steam leakage of the valve rod is blocked;
4) closing the quick-closing check valve: when the steam compensation or the steam extraction is satisfied, the electromagnetic valve on the quick-closing control device is switched, the main oil inlet is filled with oil, the quick-closing check valve quickly closes the valve under the action of the closing force of the piston spring and the oil pressure, and the steam inlet is cut off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711196854.1A CN107806522B (en) | 2017-11-25 | 2017-11-25 | Steam extraction type quick-closing check valve and working method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711196854.1A CN107806522B (en) | 2017-11-25 | 2017-11-25 | Steam extraction type quick-closing check valve and working method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107806522A CN107806522A (en) | 2018-03-16 |
| CN107806522B true CN107806522B (en) | 2020-07-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711196854.1A Active CN107806522B (en) | 2017-11-25 | 2017-11-25 | Steam extraction type quick-closing check valve and working method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN107806522B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB201904245D0 (en) | 2019-03-27 | 2019-05-08 | Lontra Ltd | Check Valve |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7527068B2 (en) * | 2002-06-18 | 2009-05-05 | Jansen's Aircraft Systems Controls, Inc. | Valve with swirling coolant |
| CN200946522Y (en) * | 2006-08-14 | 2007-09-12 | 黄云平 | Quick-close steam-extraction check valve |
| CN202280482U (en) * | 2011-09-30 | 2012-06-20 | 浙江杰特优动力机械有限公司 | Quick closing valve for steam turbine |
| CN205013781U (en) * | 2015-10-08 | 2016-02-03 | 大丰市丰泰机电有限公司 | Voltage regulator of anti dirty fast reaction |
| CN207569283U (en) * | 2017-11-25 | 2018-07-03 | 浙江杰特优动力机械有限公司 | A kind of steam-extracting type speed closes non-return valve |
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2017
- 2017-11-25 CN CN201711196854.1A patent/CN107806522B/en active Active
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| CN107806522A (en) | 2018-03-16 |
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Denomination of invention: A steam extraction quick closing check valve and its working method Effective date of registration: 20210303 Granted publication date: 20200731 Pledgee: Bank of Hangzhou Limited by Share Ltd. Tongxiang branch Pledgor: Zhejiang jieteyou Power Machinery Co.,Ltd. Registration number: Y2021330000167 |
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Denomination of invention: A steam extraction type quick-closing check valve and its working method Effective date of registration: 20220822 Granted publication date: 20200731 Pledgee: Agricultural Bank of China Limited by Share Ltd. Tongxiang branch Pledgor: Zhejiang jieteyou Power Machinery Co.,Ltd. Registration number: Y2022980013196 |