CN203604728U - Ultra-large-calibre forged steel check valve of main water supply system - Google Patents
Ultra-large-calibre forged steel check valve of main water supply system Download PDFInfo
- Publication number
- CN203604728U CN203604728U CN201320780880.XU CN201320780880U CN203604728U CN 203604728 U CN203604728 U CN 203604728U CN 201320780880 U CN201320780880 U CN 201320780880U CN 203604728 U CN203604728 U CN 203604728U
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- Prior art keywords
- valve
- valve body
- flap
- forged steel
- gland
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- Expired - Lifetime
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 14
- 239000010959 steel Substances 0.000 title claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title abstract description 5
- 239000004429 Calibre Substances 0.000 title abstract 4
- 238000007789 sealing Methods 0.000 claims abstract description 28
- 210000004907 gland Anatomy 0.000 claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 4
- 239000007787 solid Substances 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910002804 graphite Inorganic materials 0.000 claims description 4
- 239000010439 graphite Substances 0.000 claims description 4
- 229910001347 Stellite Inorganic materials 0.000 claims description 3
- AHICWQREWHDHHF-UHFFFAOYSA-N chromium;cobalt;iron;manganese;methane;molybdenum;nickel;silicon;tungsten Chemical compound C.[Si].[Cr].[Mn].[Fe].[Co].[Ni].[Mo].[W] AHICWQREWHDHHF-UHFFFAOYSA-N 0.000 claims description 3
- 238000005728 strengthening Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000005452 bending Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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- Check Valves (AREA)
Abstract
The utility model relates to an ultra-large-calibre forged steel check valve of a main water supply system. The ultra-large-calibre forged steel check valve is characterized in that a valve seat with a vertical sealing face is fixed to the liquid inlet side of the inner cavity of a valve body in a welded mode; a valve clack is arranged in the valve body through a built-in hinge mechanism; a valve cover is connected and fixed with a gland and hung in the valve body; a sealing ring is arranged on the upper end edge of the valve cover; a pendant collet with a spigot formed in the lower end is embedded in the upper portion of a middle cavity of the valve body; the sealing ring is compressed between the valve cover and the side wall of the valve body through the spigot of the pendant collet. The ultra-large-calibre forged steel check valve has the advantages that the valve seat is directly welded to the valve body, and leakage is prevented; the straight valve seat is adopted, the valve is easy to machine and operate, the valve clack is highly matched with the sealing face of the valve seat, a self-tightening sealing structure is adopted by the middle cavity, the built-in hinge mechanism is adopted by the valve clack, the strength of a shell body is improved, outer leakage points are reduced, overall sealing is reliable, and it is guaranteed that the system can operate safely and stably for a long time better. In addition, the spigot of the valve cover makes up the inward bending tendency of the pendant collet, and height of the valve cover and the overall dimension of the valve are reduced.
Description
Technical field
The utility model relates to a kind of valve, particularly a kind of main feed system super large caliber forged steel safety check.
Background technique
Electric power is the important energy source of the national economic development, the electric motor power of domestic existing power station mainly concentrates within the scope of 100-600MW, the needs of the national economic development can not be met far away, based on this, domestic thermal power generation unit is to the development of maximization, high parameter, and the domestic valve for fired power generating unit main feed water pipe road can not meet the technical parameter of 1000MW ultra supercritical large-scale thermal power machine group, and these series product also mainly depend on imported product.
Main feed system super large caliber safety check in ultra supercritical large-scale thermal power machine group is for preventing that system pipeline medium from flowing backwards, the generation of preventing accident at present.Its structure mainly comprises valve body, is built in the flap in valve body, and flap is hinged in valve body by fork, is coordinated and realizes one-way sealing with valve seat by flap.Its structural disadvantages is: when the upper end of fork and valve body are hinged, be hingedly directly through on valve body easily seepage with bearing pin; And when internal pressure is larger, easily between valve body mesopore and valve gap, cause seepage, particularly the full forged steel valve products of super large caliber is particularly evident.
Model utility content
The technical problems to be solved in the utility model is to provide that a kind of bearing capacity is strong, the main feed system super large caliber forged steel safety check of good seepage-proof property.
For solving the problems of the technologies described above, the technical solution of the utility model is: a kind of main feed system super large caliber forged steel safety check, its innovative point is: comprise valve body, valve seat, flap, rocking bar, boatswain chair, support plate, valve gap, seal ring, pendant collet and gland, the liquid feeding side of body cavity is welded and fixed the valve seat with vertical seal face, and on sealing surface built-up welding stellite layer; Valve body lumen built-in one can coordinate with sealing surface of seat the flap of realizing sealing, and this flap is arranged in valve body by internal hinge mechanism; Internal hinge mechanism comprises rocking bar, boatswain chair, support plate, described rocking bar two ends have respectively an annular solid, the annular solid of rocking bar upper end is hinged by bearing pin and boatswain chair, and the annular solid of rocking bar lower end is sleeved on flap, and is connected and fixed by flap gland, screw and flap; Described boatswain chair by bolt assembly be welded on the support plate of cavity wall in valve body and be connected and fixed, and boatswain chair is located by straight pin and support plate; Valve body lumen top is provided with valve gap, and valve gap is connected with the gland that is fixed on valve body upper end by bolt assembly; The upper end-face edge of valve gap has an annular male cone (strobilus masculinus), between this annular male cone (strobilus masculinus) and valve body lumen sidewall, is placed with seal ring, and the lower end of seal ring has a wedge shape tip just coordinating with annular male cone (strobilus masculinus); Valve body lumen top has the circular groove of a circle between gland and seal ring, is inlaid with the pendant collet of lower end band seam in circular groove; Seal ring is pressed between annular male cone (strobilus masculinus) and valve body lumen sidewall by the seam of pendant collet.
Preferably, described seal ring is for strengthening flexible graphite sealing ring.
Preferably, described gland lower end has an annular stopper of being close to pendant collet madial wall.
The utility model has the advantage of:
Valve seat is directly welded on valve body, Leakage prevention; Sealing surface weld deposit STL cemented carbide, erosion resistance, antifraying property is good, hardness is high, long service life; Adopt straight valve seat, vertical plane sealing, machining operation is simple, and flap, sealing surface of seat height coordinate, good seal performance; Internal flap adopts internal hinge mechanism, reduces bearing pin length, improves casing rigidity, reduces outside leakage point, has solved for many years the problem that leaks outside of conventional construction valve, has improved valve seal performance; Lumen adopts self-tightening sealing structure, and seal ring adopts and strengthens Expanded graphite, increases lumen sealing force, guarantees lumen reliable sealing; Pendant collet coordinates with gland, and gland seam makes up pendant collet warp tendency to the inside, reduces valve gap height and valve boundary dimension, reduce materials consumption, improve valve gap and casing rigidity, greatly improve overall sealing performance and the usability of product, guarantee better the stable operation of system long-term safety.
In addition, valve body adopts the solid forging of 15NiCuMoNb5-6-4 (WB36) material, forge material structure after processing evenly, fine and close, good combination property, that region of stress concentration material is is streamlined, high temperature creep-resisting, fatigue capability are high, be applicable to high parameter parts, greatly improve bearing capacity and the usability of producing; Can be applicable on 1050MW ultra supercritical large electric power plant unit main feed water pipe road, improve the performance parameter of domestic main feed water pipe road valve, reduce the gap with advanced foreign technology, the technical monopoly of external large size valve enterprise to such valve that be through with, met domestic fired power generating unit to maximizing, the demand of high parameter development.
Accompanying drawing explanation
Fig. 1 is the utility model main feed system super large caliber forged steel check valve structure schematic diagram.
Embodiment
Embodiment
Refer to Fig. 1, the utility model has disclosed a kind of main feed system super large caliber forged steel safety check, comprise valve body 1, valve seat 2, flap 3, rocking bar 4, bearing pin 5, boatswain chair 6, valve gap 10, seal ring 12, pendant collet 13, gland 18, support plate 19, screw 20, flap gland 21,
The liquid feeding side of valve body 1 inner chamber is welded with valve seat 2, and the sealing surface of valve seat 2 is vertical seal face, and on sealing surface built-up welding stellite layer.Valve body 1 lumen built-in one can coordinate with valve seat 2 sealing surfaces the flap 3 of realizing sealing, and this flap 3 is arranged in valve body 1 by internal hinge mechanism.
Internal hinge mechanism comprises rocking bar 4, boatswain chair 6, support plate 19, wherein, rocking bar 4 two ends have respectively an annular solid, the annular solid of rocking bar 4 upper ends is hinged by bearing pin 5 and boatswain chair 6, the annular solid of rocking bar 4 lower ends is sleeved on flap 3, and is connected and fixed with flap 3 by flap gland 21, screw 20.Boatswain chair 6 is connected and fixed by bolt assembly 7,8 and the support plate 19 that is welded on cavity wall in valve body.And boatswain chair 6 is located by straight pin 9 and support plate 19.
Valve body 1 lumen top is provided with valve gap 10, and valve gap 10 is connected and fixed and is suspended in valve body 1 by the gland 18 of bolt assembly 15,16,17 and valve body 1 upper end; The upper end-face edge of valve gap 10 has an annular male cone (strobilus masculinus), between this annular male cone (strobilus masculinus) and valve body 1 lumen sidewall, be placed with seal ring 12, seal ring 12, for strengthening flexible graphite sealing ring, has a wedge shape tip just coordinating with annular male cone (strobilus masculinus) in the lower end of seal ring 12; Valve body 1 lumen top has the circular groove of a circle between gland 18 and seal ring 12, is inlaid with the pendant collet 13 of lower end band seam in circular groove; Seal ring 12 is pressed between annular male cone (strobilus masculinus) and valve body 1 lumen sidewall by the seam of pendant collet 13.
For making up pendant collet warp tendency to the inside, reduce valve gap height and valve boundary dimension, gland lower end has an annular stopper, and the external diameter of this annular stopper and the internal diameter of pendant collet match, and make gland its annular stopper after installation be close to pendant collet madial wall.
In addition, the upper end of valve body 1 suspension ring 14 that are threaded, conveniently carry out installation, the transfer of safety check.
Working principle:
When system is normally worked, flap relies on pipeline internal medium active force automatically to open, and linkage rotates counterclockwise, and flap and valve seat are departed from, and realizes valve opening; When fluid flows in the other direction, under the effect of hydrodynamic pressure and flap deadweight, internal hinge mechanism clockwise rotates, and makes flap act on valve seat, sealing surface laminating, thus cut off media flow, prevent that medium from flowing backwards.Thereby realize the opening and closing of valve, safeguards system safe and stable operation.
Claims (3)
1. a main feed system super large caliber forged steel safety check, is characterized in that: comprise valve body, valve seat, flap, rocking bar, boatswain chair, support plate, valve gap, seal ring, pendant collet and gland,
The liquid feeding side of body cavity is welded with the valve seat with vertical seal face, and on sealing surface built-up welding stellite layer; Valve body lumen built-in one can coordinate with sealing surface of seat the flap of realizing sealing, and this flap is arranged in valve body by internal hinge mechanism;
Internal hinge mechanism comprises rocking bar, boatswain chair, support plate, described rocking bar two ends have respectively an annular solid, the annular solid of rocking bar upper end is hinged by bearing pin and boatswain chair, and the annular solid of rocking bar lower end is sleeved on flap, and is connected and fixed by flap gland, screw and flap; Described boatswain chair by bolt assembly be welded on the support plate of cavity wall in valve body and be connected and fixed, and boatswain chair is located by straight pin and support plate;
Valve body lumen top is provided with valve gap, and valve gap is connected with the gland that is fixed on valve body upper end by bolt assembly; The upper end-face edge of valve gap has an annular male cone (strobilus masculinus), between this annular male cone (strobilus masculinus) and valve body lumen sidewall, is placed with seal ring, and the lower end of seal ring has a wedge shape tip just coordinating with annular male cone (strobilus masculinus);
Valve body lumen top has the circular groove of a circle between gland and seal ring, is inlaid with the pendant collet of lower end band seam in circular groove; Seal ring is pressed between annular male cone (strobilus masculinus) and valve body lumen sidewall by the seam of pendant collet.
2. main feed system super large caliber forged steel safety check according to claim 1, is characterized in that: described seal ring is for strengthening flexible graphite sealing ring.
3. main feed system super large caliber forged steel safety check according to claim 1, is characterized in that: described gland lower end has an annular stopper of being close to pendant collet madial wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320780880.XU CN203604728U (en) | 2013-12-03 | 2013-12-03 | Ultra-large-calibre forged steel check valve of main water supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320780880.XU CN203604728U (en) | 2013-12-03 | 2013-12-03 | Ultra-large-calibre forged steel check valve of main water supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203604728U true CN203604728U (en) | 2014-05-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320780880.XU Expired - Lifetime CN203604728U (en) | 2013-12-03 | 2013-12-03 | Ultra-large-calibre forged steel check valve of main water supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203604728U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104089055A (en) * | 2014-07-02 | 2014-10-08 | 南通国电电站阀门有限公司 | Supercritical large-caliber two-direction buffer control type check valve |
| CN105135005A (en) * | 2015-08-14 | 2015-12-09 | 南通市电站阀门有限公司 | Rotary starting type check valve of water hammer prevention mechanism for pipelines |
-
2013
- 2013-12-03 CN CN201320780880.XU patent/CN203604728U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104089055A (en) * | 2014-07-02 | 2014-10-08 | 南通国电电站阀门有限公司 | Supercritical large-caliber two-direction buffer control type check valve |
| CN105135005A (en) * | 2015-08-14 | 2015-12-09 | 南通市电站阀门有限公司 | Rotary starting type check valve of water hammer prevention mechanism for pipelines |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140521 |