CN202868037U - Water-feeding pump recycling valve - Google Patents
Water-feeding pump recycling valve Download PDFInfo
- Publication number
- CN202868037U CN202868037U CN 201220604004 CN201220604004U CN202868037U CN 202868037 U CN202868037 U CN 202868037U CN 201220604004 CN201220604004 CN 201220604004 CN 201220604004 U CN201220604004 U CN 201220604004U CN 202868037 U CN202868037 U CN 202868037U
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- valve
- valve body
- valve seat
- sleeve
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Abstract
The utility model discloses a water-feeding pump recycling valve comprising a valve body and a valve rod. The valve rod is arranged inside the valve body and the lower end portion of the valve body is provided with a communicated channel in a machining forming mode. A valve core is connected with the lower end of the valve rod and is placed in the channel. Padding is fixed between the valve rod and the valve body. The water-feeding pump recycling valve is characterized in that a sleeve with a multistage throttling structure is fixed on the periphery of the valve core. The sleeve is arranged on an inner formed step of the valve body. A multistage throttling pore plate device composed of more than one throttling pore plate is arranged on an inlet section of the channel. Due to the fact that the valve with great differential pressure can produce great differential pressure to a sealing face in the moment of start and shutdown, the additional installation of the multistage throttling pore plate decompression on the back of the valve is the same as the additional installation of an obstruction structure on the back of the valve, so that flow rate of a valve seat is greatly reduced and valve medium are enabled to flow through the valve seat at low speed, and thereby cavitation and cavitation erosion in the depression process are prevented and the service life is prolonged. In addition, by matching a soft sealing valve seat and a hard sealing valve seat, zero leakage for a long time can be achieved.
Description
Technical field
The utility model relates to a kind of stop valve, particularly feed water pump recycle valve of controlling the object that flows.
Background technique
The feed water pump recycle valve is one of the most abominable several modulating valve of operating conditions in the thermal power plant, because its mounting point is between feed water pump outlet and the deaerator storage tank (or condenser), huge pressure reduction is born by this valve between the two, no matter open or closed condition under, the recirculating system minimum flow valve is to work under High Pressure Difference all the time, when minimum flow valve is in opening state, high pressure water is drained into deaerator storage tank (or condenser) after reducing pressure step by step, and in decompression process, can not cavitate; And when it is in closed condition, should be able to bear up to 450bar even higher differential static pressure, and accomplish to close closely.
Operating conditions near saturation pressure behind flash distillation, cavitation erosion, large pressure reduction and the valve easily causes flash distillation, cavitation erosion, noise and vibration to be strengthened, cause wearing and tearing, the leakage (leaking to increase energy consumption, and therefore some power plant reduces by 10% load) of spool, valve body, pipeline and stop up (the solid impurity impact is closely turn-offed); Cavitation is directly related with pressure reduction, therefore, if highly pressurised liquid is controlled at when being higher than the saturated vapor pressure of this fluid under inlet temperature all the time through the pressure of throttle element, does not just produce " cavitation ", certainly also just " cavitation " can not occur.This is the theoretical foundation of the anti-cavitation high-differential-pressure regulating valve of various multilevel decompressions now.Present main two kinds of using: valve rod cascade type multistage pressure-reducing regulation valve and labyrinth type multilevel decompression valve, short for the former modulating valve working life, the leakage current amount is large, mainly be to be subjected to cavitation, flash distillation to the damage of outbreak sealing surface, the vibration of generation and noise; The latter is short working life.
The model utility content
The purpose of this utility model is the feed water pump recycle valve that a kind of resistance to erosion is provided in order to solve above-mentioned the deficiencies in the prior art and realizes zero leakage.
To achieve these goals, the feed water pump recycle valve that the utility model is designed, comprise valve body, valve gap and valve rod, valve body and valve gap are fixed, valve rod places in valve body and the valve gap, the place's machine shaping of valve body bottom has the passage that communicates, the valve rod lower end is connected with spool, spool is arranged in passage, be fixed with filler between valve rod and the valve body, it is characterized in that: described spool periphery is fixed with the sleeve of multistage throttle structure, and sleeve places on the step of interior moulding of valve body, and the inducer of described passage is provided with the multistage throttle orifice fitting that an above restricting orifice forms.
Preferably, be respectively equipped with soft, hard seal valve seat on the described valve interior wall, hard seal valve seat is fixed on the vias inner walls step of valve body and in the lower end of sleeve and conflicts, and the soft seal valve seat is arranged in sleeve lower end and the fixing groove that forms of hard seal valve seat.
Preferably, described valve body is connected with bonnet flange and is fixed.
Preferably, described soft seal valve seat is Y type elastic packing valve seat.
The feed water pump recycle valve that the utility model obtains, because the valve of large pressure reduction can produce large pressure reduction to sealing surface in the moment that opens and closes, behind valve, install the decompression of multistage throttle orifice plate additional, equal behind valve, to install additional resistance mechanism, greatly reduce the flow velocity of valve seat, make valve medium low-speed flow cross valve seat, prolonged working life.What adopt is the multistage throttle sleeve, effectively overcome cavitation phenomenons, prolonged the life-span of valve, the footpath is by the direction of this multistage change fluid, reaching increases resistance and consumes the fluid self-energy and realize progressively step-down, and prevents from producing in the step-down process cavitation and cavitation.Part fluid is divided into two, dorsad diffluence, and another part fluid unites two into one, and converges in opposite directions, and swiftly flowing molecule produces bump, friction and vortex, lot of energy, step pressure reducing; And adopt soft, being used of hard seal valve seat can realize long-term zero leakage.
Description of drawings
Fig. 1 is overall structure schematic representation of the present utility model;
Fig. 2 is multistage throttle tube-in-tube structure schematic representation;
Fig. 3 is multistage throttle telescopic flow direction of flow schematic representation.
Among the figure: multistage throttle orifice fitting 1, valve rod 2, spool 3, passage 4, filler 5, valve body 6, valve gap 7, axle sleeve 8, hard seal valve seat 11, soft seal valve seat 12, sleeve 13, inducer 41, flange plate 32.
Embodiment
Below in conjunction with drawings and Examples the utility model is further specified.
Embodiment:
As shown in Figure 1, the feed water pump recycle valve that present embodiment provides, comprise valve body 6, valve gap 7 and valve rod 2, the lower end of valve gap cooperates flange to be connected with flange plate 32 with its valve body 6, valve rod 2 places in valve body 6 and the valve gap 7, the place's machine shaping of valve body bottom has the passage 4 that communicates, the valve rod lower end is connected with spool 3, spool 3 is arranged in passage 4, be fixed with filler 5 between valve rod 2 and the valve gap 7, between the filler 5 isolating ring is housed, axle sleeve 8 is installed between the opening of the upper end of valve rod and the flange plate of valve gap, Fig. 2, shown in, described spool 3 peripheries are fixed with the sleeve 13 of multistage throttle structure, it is the fluid schematic of multistage throttle structure among Fig. 3, design principle is that groove is opened radially slotted eye, and inwall forms tortuous changeable, the path of interpenetrating, direction by this multistage change fluid, reaching increases resistance and consumes the fluid self-energy and realize progressively step-down, and prevents from producing in the step-down process cavitation and cavitation, as shown by arrows, part fluid is divided into two, dorsad diffluence, another part fluid unites two into one, and converges in opposite directions.Swiftly flowing molecule produces bump, friction and vortex, lot of energy, the step pressure reducing sleeve places on the step of interior moulding of valve body, consider that large pressure differential valve can produce large pressure reduction to sealing surface in the moment that opens and closes, the inducer 41 of described passage is provided with the multistage throttle orifice fitting 1 that an above restricting orifice forms, equal behind valve, to install additional resistance mechanism, greatly reduce the flow velocity of valve seat, make valve medium low-speed flow cross valve seat, prolonged working life, multistage throttle sleeve 13, the combination of multistage throttle orifice fitting 1 has good cavitation-preventive, noise-reducing, the characteristics of resistance to erosion under large pressure reduction operating mode, are utilized the effective control media flow velocity of method of step pressure reducing.
Be respectively equipped with soft, hard seal valve seat 12 on the described valve interior wall, 11, described soft seal valve seat Y type elastic packing valve seat, hard seal valve seat 11 is fixed on the vias inner walls step of valve body and in the lower end of sleeve and conflicts, soft seal valve seat 12 is arranged on the sleeve lower end and fixes in the groove that forms with hard seal valve seat, hard seal valve seat 11, soft seal valve seat 12 are combined with, and can long term zero leak.The spool 3 that metal is made, hard seal valve seat 11 are used and adopt many revolution Densos that sealing surface is combined closely, and can prevent tiny leakage.
The feed water pump recycle valve that the utility model obtains, multi-stage sleeve 13, Rectifier plate combination 1 reach multistage throttle, adopt many revolution dresses, and High power output has increased and has closed ouput force, and soft, hard seal valve seat 12,11 cooperatively interacts, and guarantees long-term zero leakage.
Claims (4)
1. feed water pump recycle valve, comprise valve body, valve gap and valve rod, valve body and valve gap are fixed, valve rod places in valve body and the valve gap, the place's machine shaping of valve body bottom has the passage that communicates, the valve rod lower end is connected with spool, spool is arranged in passage, be fixed with filler between valve rod and the valve gap, it is characterized in that: described spool periphery is fixed with the sleeve of multistage throttle structure, sleeve places on the step of interior moulding of valve body, and the inducer of described passage is provided with the multistage throttle orifice fitting that an above restricting orifice forms.
2. feed water pump recycle valve according to claim 1, it is characterized in that: be respectively equipped with soft, hard seal valve seat on the valve interior wall, hard seal valve seat is fixed on the vias inner walls step of valve body and in the lower end of sleeve and conflicts, and the soft seal valve seat is arranged in sleeve lower end and the fixing groove that forms of hard seal valve seat.
3. feed water pump recycle valve according to claim 1, it is characterized in that: described valve body and valve gap are connected and fixed by flange.
4. double seal antiscour self-sealing stop valve according to claim 2, it is characterized in that: the soft seal valve seat is Y type elastic packing valve seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220604004 CN202868037U (en) | 2012-10-30 | 2012-10-30 | Water-feeding pump recycling valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220604004 CN202868037U (en) | 2012-10-30 | 2012-10-30 | Water-feeding pump recycling valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202868037U true CN202868037U (en) | 2013-04-10 |
Family
ID=48034757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220604004 Expired - Lifetime CN202868037U (en) | 2012-10-30 | 2012-10-30 | Water-feeding pump recycling valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202868037U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103292030A (en) * | 2013-06-18 | 2013-09-11 | 苏州德兰能源科技有限公司 | Multi-stage depressurizing blow-down valve |
| CN103672157A (en) * | 2013-12-19 | 2014-03-26 | 吴忠中创自控阀有限公司 | Multilayer screw type multi-hole depressurization adjusting valve |
| CN105626957A (en) * | 2016-03-25 | 2016-06-01 | 吴忠仪表有限责任公司 | Cavitation-resisting and pressure-lowering lamination valve cage |
| CN105952906A (en) * | 2016-05-10 | 2016-09-21 | 应建忠 | Labyrinth adjusting valve |
| CN107120466A (en) * | 2017-07-06 | 2017-09-01 | 李岑文达 | A kind of extra-supercritical unit high pressure bypass valve |
| WO2020025038A1 (en) * | 2018-08-03 | 2020-02-06 | Emerson Process Management (Tianjin) Valves Co., Ltd. | Control valves and cages that are adapted to reduce flashing and cavitation |
| CN111828681A (en) * | 2020-07-23 | 2020-10-27 | 杨皓然 | Automatic temperature regulating valve of heating system |
| CN112066050A (en) * | 2020-08-04 | 2020-12-11 | 华中科技大学 | Safety valve of shunting hedging type valve sleeve with 3D printing function |
| CN112067426A (en) * | 2020-09-27 | 2020-12-11 | 兰州理工大学 | Visual measuring device for erosion of separated valve port and using method |
| CN113531203A (en) * | 2021-02-02 | 2021-10-22 | 吴忠中创自控阀有限公司 | Y-shaped runner throttling sleeve |
-
2012
- 2012-10-30 CN CN 201220604004 patent/CN202868037U/en not_active Expired - Lifetime
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103292030A (en) * | 2013-06-18 | 2013-09-11 | 苏州德兰能源科技有限公司 | Multi-stage depressurizing blow-down valve |
| CN103672157A (en) * | 2013-12-19 | 2014-03-26 | 吴忠中创自控阀有限公司 | Multilayer screw type multi-hole depressurization adjusting valve |
| CN103672157B (en) * | 2013-12-19 | 2016-09-28 | 吴忠中创自控阀有限公司 | Multi-deck screw type porous decompression regulating valve |
| CN105626957A (en) * | 2016-03-25 | 2016-06-01 | 吴忠仪表有限责任公司 | Cavitation-resisting and pressure-lowering lamination valve cage |
| CN105626957B (en) * | 2016-03-25 | 2019-01-25 | 吴忠仪表有限责任公司 | Anti-cavitation is depressured lamination valve cage |
| CN105952906A (en) * | 2016-05-10 | 2016-09-21 | 应建忠 | Labyrinth adjusting valve |
| CN107120466A (en) * | 2017-07-06 | 2017-09-01 | 李岑文达 | A kind of extra-supercritical unit high pressure bypass valve |
| US11703146B2 (en) | 2018-08-03 | 2023-07-18 | Emerson Process Management (Tianjin) Valves Co., Ltd. | Control valves and cages that are adapted to reduce flashing and cavitation |
| WO2020025038A1 (en) * | 2018-08-03 | 2020-02-06 | Emerson Process Management (Tianjin) Valves Co., Ltd. | Control valves and cages that are adapted to reduce flashing and cavitation |
| CN111828681A (en) * | 2020-07-23 | 2020-10-27 | 杨皓然 | Automatic temperature regulating valve of heating system |
| CN111828681B (en) * | 2020-07-23 | 2021-12-17 | 台州艾迪西盛大暖通科技有限公司 | Automatic temperature regulating valve of heating system |
| CN112066050B (en) * | 2020-08-04 | 2022-04-01 | 华中科技大学 | Safety valve of shunting hedging type valve sleeve with 3D printing function |
| CN112066050A (en) * | 2020-08-04 | 2020-12-11 | 华中科技大学 | Safety valve of shunting hedging type valve sleeve with 3D printing function |
| CN112067426A (en) * | 2020-09-27 | 2020-12-11 | 兰州理工大学 | Visual measuring device for erosion of separated valve port and using method |
| CN112067426B (en) * | 2020-09-27 | 2023-08-04 | 兰州理工大学 | Visual measuring device for erosion of separated valve port and use method |
| CN113531203A (en) * | 2021-02-02 | 2021-10-22 | 吴忠中创自控阀有限公司 | Y-shaped runner throttling sleeve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130410 |
|
| CX01 | Expiry of patent term |