CN2773424Y - Water-supply three-way valve of high-pressure water heater in power plant - Google Patents
Water-supply three-way valve of high-pressure water heater in power plant Download PDFInfo
- Publication number
- CN2773424Y CN2773424Y CN 200520025345 CN200520025345U CN2773424Y CN 2773424 Y CN2773424 Y CN 2773424Y CN 200520025345 CN200520025345 CN 200520025345 CN 200520025345 U CN200520025345 U CN 200520025345U CN 2773424 Y CN2773424 Y CN 2773424Y
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- valve
- valve body
- upper valve
- valve seat
- ring
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- Expired - Fee Related
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 17
- 125000006850 spacer group Chemical group 0.000 claims abstract description 19
- 238000007789 sealing Methods 0.000 abstract description 15
- 230000000903 blocking effect Effects 0.000 abstract 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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Abstract
The utility model relates to a water-supply three-way valve of a high-pressure water heater in power plants, which is composed of a valve body, a valve core, an upper valve seat, a lower valve seat, a valve rod, a valve cover component and a sealing ring which are connected, wherein the valve body is provided with a water input pipe, a water output pipe and a by-pass pipe; the valve body is connected with a water control part which comprises a piston; an inner cavity of the valve body is provided with the valve rod coaxially; the upper part of the valve rod is provided with the valve cover component; the lower part of the valve rod is connected with the valve core; the corresponding upper valve seat is provided with the sealing ring. The sealing ring is characterized in that the sealing ring is provided with a uniform pressure ring; a blocking ring which is arranged on the uniform pressure ring is embedded in an annular slot of the inner cavity of the valve body; the blocking ring is provided with a tightening cover of the upper valve seat; the tightening cover of the upper valve seat is connected with the upper valve seat through a self tightening screw bolt; the upper part of the tightening cover of the upper valve seat is provided with a spacer sleeve; the spacer sleeve is positioned and matched with the valve cover component of the upper part of the valve body through a stop pin; the spacer sleeve is tightly connected with the valve body through fixing screw bolts. When the valve seat moves upward caused by that the valve core is pushed upward so as to compress the sealing ring, a self tightening structure guarantees reliable fixation of the upper valve seat and effectively prevents leakage.
Description
Technical field
The utility model relates to power station high-pressure heater water supply device, particularly a kind of power station high-pressure heater feedwater three-way valve.
Background technique
At present, the effect of power station high-pressure heater feedwater three-way valve is when the high-pressure heater water level rises rapidly owing to the heat exchanging tube fracture, cut off feedwater by high-pressure heater inside, with guarantee the high-pressure heater housing can the superpressure explosion, feedwater can not enter steam turbine and boiler can not cut off the water supply by extraction line.But because the design of the upper valve base fixed structure of existing three-way valve structure is unreasonable, packing seal ring wearing and tearing through moving upper valve base after a while, wash out, the cold sealing position short-circuit flow of feedwater through between upper valve base and valve body in service exports to high-pressure heater, cold feedwater with the heating after feedwater mix, feed temperature after the heating is reduced significantly, have a strong impact on the heat-economy of power plant.
The model utility content
The purpose of this utility model is to overcome above-mentioned deficiency, and a kind of power station high-pressure heater feedwater three-way valve with safe and reliable self fastening function is provided.
The technological scheme that the utility model adopted is for achieving the above object: a kind of power station high-pressure heater feedwater three-way valve is connected and composed by valve body, spool, upper valve base, lower valve base, valve rod, valve gap assembly and seal ring; Valve body is provided with water inlet pipe, outlet pipe and bypass tube, connects the water control part that comprises piston on the valve body, the coaxial valve rod that is provided with of body cavity, and valve rod top is provided with the valve gap assembly, and stem lower portion connects spool, and corresponding upper valve base is provided with seal ring; It is characterized in that seal ring is provided with piezometer ring, the baffle ring which is provided with embeds the endoceliac circular groove of valve, baffle ring is provided with upper valve base and tightly covers, adopt self-locking bolt to connect tight lid of upper valve base and upper valve base, the upper valve base tightly portion of covering is provided with spacer sleeve, adopt stop pin that spacer sleeve is cooperated with the valve gap assembly location on valve body top, and adopt fixing bolt that spacer sleeve and valve body are fastenedly connected.
The utility model has the advantages that: when upper valve base pushes away the seal ring compression on owing to spool and moves up, utilize its self-tightening structure, make the upper valve base secure fixation, and not can because of spool make progress thrust release and descend again, thoroughly eliminated the hidden danger that the upper valve base seal ring leaks.This three-way valve is simple in structure, and self-tightening is reliable, applied range.
Description of drawings
Fig. 1 is the utility model structure cross-sectional schematic.
Among the figure: 1 valve body, 2 spools, 3 upper valve bases, 4 seal rings, 5 piezometer rings, 6 baffle rings, 7 upper valve bases tightly cover, 8 self-locking bolts, 9 valve rods, 10 spacer sleeves, 11 stop pin, 12 fixing bolts, 13 lower valve bases, 14 valve gap assemblies, 15 inlet ducts, 16 bypass tubes, 17 outer pipes.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, details are as follows to embodiment, structure, feature that foundation the utility model provides:
As shown in Figure 1, this three-way valve is connected and composed by valve body 1, spool 2, upper valve base 3, lower valve base 13, valve rod 9, valve gap assembly 14 and seal ring 4; Valve body 1 is provided with water inlet pipe 15, outlet pipe 17 and bypass tube 16, connects the water control part that comprises piston on the valve body 1, and is not shown; The coaxial valve rod 9 that is provided with of valve body 1 inner chamber, valve rod 9 tops are provided with valve gap assembly 14, and valve rod 9 bottoms connect spool 2, and corresponding upper valve base 3 is provided with seal ring 4; It is characterized in that seal ring 4 is provided with piezometer ring 5, the circular groove that the baffle ring 6 which is provided with embeds in valve body 1 chamber, baffle ring 6 is provided with the tight lid 7 of upper valve base, adopt self-locking bolt 8 to connect tight lid 7 of upper valve base and upper valve base 3, the tight lid of upper valve base 7 tops are provided with spacer sleeve 10, adopt stop pin 11 that spacer sleeve 10 is cooperated with valve gap assembly 14 location on valve body 1 top, and adopt fixing bolt 12 that spacer sleeve 10 and valve body 1 are fastenedly connected.
Described self-locking bolt 8 is provided with 4～16 covers.Also can be provided with turnbuckle simultaneously, fastening upper valve base 13 and seal ring 4.
Described fixing bolt 12 radially is arranged at valve body 1.Bolt can adopt the modified material of low-alloy.
Before high-pressure heater feedwater three-way valve came into operation, spool 2 cooperated with lower valve base 13, makes feedwater not enter high-pressure heater, and feedwater this moment flows to the high-pressure heater outlet through bypass tube 16 and enters boiler.
When needing to drop into high-pressure heater and feedwater three-way valve, open the high-pressure heater water injection valve, feedwater enters the high-pressure heater system through water injecting pipe.When high-pressure heater is approaching or identical by the feedwater pressure in fills with water and feedwater pressure and the triple valve inlet pipe 15, spool 2 about rising under the action of pressure.When spool 2 sealing surfaces with after upper valve base 3 sealing surfaces contact, because the thrust that spool 2 makes progress moves up seal ring 4 compressions, upper valve base 3.Because the upper valve base 3 of existing three-way valve setting and the fastening force that compresses sealing of seal ring 4 only come from turnbuckle; At this moment, the nut of turnbuckle becomes flexible owing to moving on the upper valve base 3; But,, under tight lid 7 of upper valve base and spacer sleeve 10 actings in conjunction, make seal ring 4 continue to compress because self-locking bolt 8 shrinks.The self-tightening sealing structure that the tight lid 7 of upper valve base, self-locking bolt 8 and spacer sleeve 10 constitute makes upper valve base 3 secure fixation.Under this kind state, feedwater enters high-pressure heater through outer pipe 17 and absorbs heat and heat up and enter boiler again, has guaranteed 1 sealing reliably of upper valve base 3 and valve body, and feedwater can not flow directly to high-pressure heater through bypass tube 16 and export.
When the high-pressure heater needs are out of service, high-pressure heater feedwater three-way valve is closed, spool 2 moves down into lower valve base 13 and contacts, the thrust that spool 2 makes progress discharges, upper valve base 3 can not descend under the self-tightening sealing structure function that the tight lid 7 of upper valve base, self-locking bolt 8 and spacer sleeve 10 constitute, so guaranteed the fastening force that continues, made the seal ring 4 of upper valve base 3 not loose, do not leak.
Three-way valve self-tightening sealing structure is also utilized the circular groove that turning goes out from the valve body 1 and is embedded the acting in conjunction of shelves ring 6 wherein, and making upper valve base 3 reliable and effective is immovable point with baffle ring 6.
The reason that upper valve base 3 can only move to valve gap 14 directions is the exercising result of self-tightening sealing structure.For guarantee that spacer sleeve 10 can not rotate, and installs two stop pin 11 at spacer sleeve 10 tops in the middle of operation.Simultaneously utilize fixing bolt 12 that spacer sleeve 10 and valve body 1 is fastening and reliably compress the tight lid 7 of upper valve base, realize self fastening function, reach and make the upper valve base 3 unidirectional purposes that compress in order to guarantee that the self-tightening sealing structure can work well.
Claims (3)
1, a kind of power station high-pressure heater feedwater three-way valve is connected and composed by valve body, spool, upper valve base, lower valve base, valve rod, valve gap assembly and seal ring; Valve body is provided with water inlet pipe, outlet pipe and bypass tube, connects the water control part that comprises piston on the valve body, the coaxial valve rod that is provided with of body cavity, and valve rod top is provided with the valve gap assembly, and stem lower portion connects spool, and corresponding upper valve base is provided with seal ring; It is characterized in that seal ring is provided with piezometer ring, the baffle ring which is provided with embeds the endoceliac circular groove of valve, baffle ring is provided with upper valve base and tightly covers, adopt self-locking bolt to connect tight lid of upper valve base and upper valve base, the upper valve base tightly portion of covering is provided with spacer sleeve, adopt stop pin that spacer sleeve is cooperated with the valve gap assembly location on valve body top, and adopt fixing bolt that spacer sleeve and valve body are fastenedly connected.
2, high-pressure heater feedwater three-way valve in power station according to claim 1 is characterized in that described self-locking bolt is provided with 4～16 covers.
3, high-pressure heater feedwater three-way valve in power station according to claim 1 is characterized in that described fixing bolt radially is arranged at valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520025345 CN2773424Y (en) | 2005-03-04 | 2005-03-04 | Water-supply three-way valve of high-pressure water heater in power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520025345 CN2773424Y (en) | 2005-03-04 | 2005-03-04 | Water-supply three-way valve of high-pressure water heater in power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2773424Y true CN2773424Y (en) | 2006-04-19 |
Family
ID=36708687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520025345 Expired - Fee Related CN2773424Y (en) | 2005-03-04 | 2005-03-04 | Water-supply three-way valve of high-pressure water heater in power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2773424Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102996853A (en) * | 2012-08-17 | 2013-03-27 | 大连大高阀门股份有限公司 | High-temperature, high-class and large-caliber electric high-feeding-hole three-way valve |
| WO2018094662A1 (en) * | 2016-11-24 | 2018-05-31 | 周玉春 | Three-way change-over valve providing continuous flow |
-
2005
- 2005-03-04 CN CN 200520025345 patent/CN2773424Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102996853A (en) * | 2012-08-17 | 2013-03-27 | 大连大高阀门股份有限公司 | High-temperature, high-class and large-caliber electric high-feeding-hole three-way valve |
| WO2018094662A1 (en) * | 2016-11-24 | 2018-05-31 | 周玉春 | Three-way change-over valve providing continuous flow |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: TIANJIN HAICHUAN ELECTRIC POWER TECHNOLOGY CO., LT Free format text: FORMER OWNER: LIU SONGBIN Effective date: 20090605 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20090605 Address after: No. 11, refractory Road, No. 1 bridge, Hedong District, Tianjin, China: 300180 Patentee after: Tianjin Haichuan Electric Power Technology Co., Ltd. Address before: No. 5, telex super Road, No. two, Hedong Road, Hedong District, Tianjin, 227, zip code: 300180 Patentee before: Liu Songbin |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060419 Termination date: 20140304 |