CN201100418Y - An erosion prevention cut-off valve - Google Patents
An erosion prevention cut-off valve Download PDFInfo
- Publication number
- CN201100418Y CN201100418Y CNU2007200918930U CN200720091893U CN201100418Y CN 201100418 Y CN201100418 Y CN 201100418Y CN U2007200918930 U CNU2007200918930 U CN U2007200918930U CN 200720091893 U CN200720091893 U CN 200720091893U CN 201100418 Y CN201100418 Y CN 201100418Y
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- CN
- China
- Prior art keywords
- valve
- flap
- valve seat
- stem
- valve body
- 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.)
- Expired - Fee Related
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- Lift Valve (AREA)
Abstract
The utility model discloses a cut-off valve which is applied in a delivery and emptying system under the high-temperature and high-pressure environment, comprising a bracket, a valve body, a valve base, a valve core and a valve rod, wherein a guiding channel and a guiding window are arranged on the valve base, the valve core is composed of a valve clack and a core pole, and the valve base body is arranged between the valve clack and the core pole. The valve base and the core pole are cooperated with each other to form a front auxiliary sealing surface, the valve base and the valve clack are cooperated with each other to form a back auxiliary sealing surface, and the valve clack and a sealing ring on the valve base are cooperated with each other to form a main sealing surface. When opened and closed, the three sealing surfaces are orderly acted to realize the triple seal, thereby achieving the purpose of preventing water flow from directly impacting the main sealing surface, thereby avoiding producing pitting on the sealing surfaces under the impact of the high-speed liquid, protecting the sealing property of the main sealing surface, and largely prolonging the utilizing life of the valve.
Description
Technical field
The utility model relates to a kind of valve, relates generally to a kind of stop valve in the unrestrained water system under high temperature, the hyperbaric environment that is applied to.
Background technique
In the unrestrained water system of thermal power plant and relevant heat distribution pipe network, generally all select for use stop valve as control valve.The valve of which kind of structural type no matter all is to rely on the intact cooperation of its working surface to realize control to current.But in high temperature, hyperbaric environment, the sealing surface of valve is under the impact of the high-velocity fluid that constantly is subjected to, and its surface causes valve to reveal the working life of having lowered valve greatly because fatigue ruption produces spot corrosion thereby sealing surface is produced damage.
Summary of the invention
The purpose of this utility model provides and a kind ofly can be applicable to stop valve high temperature, high-pressure work environment, simple in structure, reliable performance, long service life.
For reaching above-mentioned purpose, the technical solution adopted in the utility model is: this protection against erosion stop valve comprises support, be fixed on the valve body on the support, be contained in the valve seat in the valve body, the spool that matches with valve seat, the valve rod that is connected with spool and be arranged on self-tightening adjustment rack and hold-down grid on the support, center at valve seat is provided with guide channel, the water inlet of guide channel is connected with the water intake of valve body, be provided with the water conservancy diversion window that is connected with guide channel on the top of valve seat pedestal, the water intake of valve body is connected with the water outlet of valve body by the water conservancy diversion window, is provided with seal ring in the bottom of valve seat; Described spool is combined by flap and the coaxial stem stem that is fixed on the flap endoporus, and the upper end of flap is connected with valve rod, and cylindrical is provided with the conical surface in the lower end of flap; Valve body is between flap and stem stem, and the endoporus of the guide channel on the valve seat and the outer round surface of stem stem are slidingly matched, and the outer round surface of valve body and the endoporus of flap are slidingly matched; The lower end conical surface of flap matches with the seal ring on the valve seat.
The lower end surface of described stem stem protrudes in the lower end surface of flap.
The flap upper end is hinged by pin and valve rod lower end.
Stem stem is fixed by welding in the endoporus of flap, and valve seat is contained in the inner chamber of valve body by pressing.
Because the water conservancy diversion window that is provided with guide channel and is connected on the top of valve seat pedestal in this programme with guide channel, valve body is between flap and stem stem, make the lower end conical surface of the flap formation primary sealing area that matches with seal ring on the valve seat, the outer round surface of valve body and the endoporus of flap are slidingly matched and form the back secondary sealing area, and the endoporus that is arranged on valve seat center guide channel is slidingly matched with the outer round surface of stem stem and forms preceding secondary sealing area.When valve opening, at first open primary sealing area, be the back secondary sealing area then, when last current secondary sealing area was opened, primary sealing area had reached certain aperture, can alleviate fluid impact to primary sealing area when the water conservancy diversion window is discharged like this.In addition, go out seal ring, formed the cofferdam of blocking fluid together, make fluid when going out the water conservancy diversion window, produce eddy current, thereby avoided the direct impact of current primary sealing area in the valve seat block height of water conservancy diversion beneath window.The utility model is protected the sealability of primary sealing area by realizing three grades of sealings, prolongs the valve purpose in working life to reach.
Description of drawings
Fig. 1 is an internal structure schematic representation of the present utility model;
Fig. 2 is the structural representation of spool;
Fig. 3 is the structural representation of valve seat.
Embodiment
This protection against erosion stop valve comprises the support 10 that is fixed on the Electric actuator, by the fixedly connected valve body 1 of screw thread and support, be contained in valve seat 2 in the valve body 1, the spool, the valve rod 9 that is connected with spool that match with valve seat 2 and be contained in self-tightening adjustment rack 11 and the hold-down grid 12 that is used to adjust the sealing surface gap on the support 10, the power intake of valve rod 9 is connected with the clutch end of Electric actuator.Valve seat 2 is by the inner chamber of pressing and fixing at valve body 1.Center at valve seat 2 is provided with guide channel, the water inlet of guide channel is connected with the water intake of valve body 1, be provided with the water conservancy diversion window 7 that is connected with guide channel on the top of valve seat 2 pedestals, the water intake of valve body 1 is connected by the water outlet of water conservancy diversion window 7 with valve body 1, is provided with seal ring 3 in the bottom of valve seat 2.In the present embodiment, described spool is combined by flap 8 and the coaxial stem stem 6 that is fixed on flap 8 endoporus, and stem stem 6 is fixed by welding in the endoporus of flap 8.The upper end of flap 8 is hinged by the lower end of pin and valve rod 9.Be provided with and the identical sealing cone of seal ring 3 materials at the lower end of flap 8 cylindrical.The pedestal top of valve seat 2 is between flap 8 and stem stem 6, secondary sealing area 5 before the endoporus of the guide channel at valve seat 8 centers and the outer round surface of stem stem 6 are slidingly matched and form, the outer round surface of valve seat 2 pedestals and the endoporus of flap 8 are slidingly matched and form back secondary sealing area 4, the lower end conical surface of the flap 8 formation primary sealing area that matches with seal ring 3 on the valve seat 2.When valve opening, for being later than primary sealing area, opens at last secondary sealing area 5 before making, and the lower end surface of described stem stem 6 is set to protrude in the lower end surface of flap 8.
Its working principle is:
When valve opening, Electric actuator drives flap 8 by valve rod 9 and rises, in uphill process, at first open the primary sealing area that the lower end conical surface of flap 8 matches and forms with seal ring 3 on the valve seat, after primary sealing area has reached certain aperture, then open valve seat 2 cylindricals and cooperate the back secondary sealing area 4 that forms with flap 8 endoporus, open valve seat 2 guide channel endoporus at last and cooperate the preceding secondary sealing area 5 that forms with stem stem 6 cylindricals, make primary sealing area in the process of valve opening, alleviate fluid impact to primary sealing area when water conservancy diversion window 7 is discharged.
When valve closing, flap 8 moves down under the drive of valve rod 9, and stem stem 6 is at first closed water conservancy diversion window 7, and secondary sealing area 5 is realized first order sealing before making.Along with moving down of valve rod 9, the back secondary sealing area 4 that valve seat 2 and flap 8 forms begins to cooperate and works, and realizes that the second level seals.Along with valve rod 9 continue move down, flap 8 is closed with the primary sealing area that valve seat 2 is formed, and realizes third level sealing, makes primary sealing area when valve closing, does not bear washing away of fluid pressure difference stream and fluid.
In addition, the valve seat block height below water conservancy diversion window 7 goes out seal ring, has formed the cofferdam of blocking fluid together, makes fluid produce eddy current when going out the water conservancy diversion window, thereby has avoided the direct impact of current to primary sealing area.The utility model is protected the sealability of primary sealing area by realizing three grades of sealings, prolongs the valve purpose in working life to reach.
Claims (4)
1, a kind of protection against erosion stop valve, valve body on comprising support and being fixed on support, be contained in valve seat in the valve body, the spool, the valve rod that is connected with spool that match with valve seat and be arranged on self-tightening adjustment rack and hold-down grid on the support, it is characterized in that: the center at valve seat is provided with guide channel, the water inlet of guide channel is connected with the water intake of valve body, be provided with the water conservancy diversion window that is connected with guide channel on the top of valve seat pedestal, the water intake of valve body is connected with the water outlet of valve body by the water conservancy diversion window, is provided with seal ring in the bottom of valve seat; Described spool is combined by flap and the coaxial stem stem that is fixed on the flap endoporus, and the upper end of flap is connected with valve rod, and cylindrical is provided with the conical surface in the lower end of flap; Valve body is between flap and stem stem, and the endoporus of the guide channel on the valve seat and the outer round surface of stem stem are slidingly matched, and the outer round surface of valve body and the endoporus of flap are slidingly matched; The lower end conical surface of flap matches with the seal ring on the valve seat.
2, protection against erosion stop valve according to claim 1 is characterized in that: the lower end surface of described stem stem protrudes in the lower end surface of flap.
3, protection against erosion stop valve according to claim 2 is characterized in that: the flap upper end is hinged by pin and valve rod lower end.
4, protection against erosion stop valve according to claim 3 is characterized in that: stem stem is fixed by welding in the endoporus of flap, and valve seat is contained in the inner chamber of valve body by pressing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200918930U CN201100418Y (en) | 2007-09-18 | 2007-09-18 | An erosion prevention cut-off valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200918930U CN201100418Y (en) | 2007-09-18 | 2007-09-18 | An erosion prevention cut-off valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201100418Y true CN201100418Y (en) | 2008-08-13 |
Family
ID=39936953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200918930U Expired - Fee Related CN201100418Y (en) | 2007-09-18 | 2007-09-18 | An erosion prevention cut-off valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201100418Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103671942A (en) * | 2013-12-07 | 2014-03-26 | 锦州高压阀门厂 | Balanced type multipurpose valve with cut-off, non-return and adjusting functions |
| CN104006165A (en) * | 2012-09-21 | 2014-08-27 | 张轶 | Two-stage seal stop valve |
| CN105605301A (en) * | 2016-03-04 | 2016-05-25 | 中国船舶重工集团公司第七一九研究所 | Main sealing structure for high-temperature-resistant and high-pressure-resistant air check valve |
| CN109027274B (en) * | 2017-06-08 | 2020-03-17 | 中核苏阀科技实业股份有限公司 | Bimetal seal elastic anti-scouring structure and stop valve thereof |
-
2007
- 2007-09-18 CN CNU2007200918930U patent/CN201100418Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104006165A (en) * | 2012-09-21 | 2014-08-27 | 张轶 | Two-stage seal stop valve |
| CN104006165B (en) * | 2012-09-21 | 2016-05-11 | 张轶 | Secondary seal stop valve |
| CN103671942A (en) * | 2013-12-07 | 2014-03-26 | 锦州高压阀门厂 | Balanced type multipurpose valve with cut-off, non-return and adjusting functions |
| CN103671942B (en) * | 2013-12-07 | 2015-10-14 | 锦州高压阀门厂 | Balanced type cut-off non-return regulates multipurpose valve |
| CN105605301A (en) * | 2016-03-04 | 2016-05-25 | 中国船舶重工集团公司第七一九研究所 | Main sealing structure for high-temperature-resistant and high-pressure-resistant air check valve |
| CN109027274B (en) * | 2017-06-08 | 2020-03-17 | 中核苏阀科技实业股份有限公司 | Bimetal seal elastic anti-scouring structure and stop valve thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080813 Termination date: 20150918 |
|
| EXPY | Termination of patent right or utility model |