CN202901422U - High-pressure difference feed-regulating valve - Google Patents
High-pressure difference feed-regulating valve Download PDFInfo
- Publication number
- CN202901422U CN202901422U CN 201220602306 CN201220602306U CN202901422U CN 202901422 U CN202901422 U CN 202901422U CN 201220602306 CN201220602306 CN 201220602306 CN 201220602306 U CN201220602306 U CN 201220602306U CN 202901422 U CN202901422 U CN 202901422U
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- China
- Prior art keywords
- valve
- pressure difference
- flap
- high pressure
- water feed
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- Expired - Lifetime
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Abstract
The utility model relates to a high-pressure difference feed-regulating valve. The high-pressure difference feed-regulating valve comprises a valve deck, a valve body and a valve rod; the valve deck and the valve body are connected through a bolt; valve seats are arranged in the valve body; the valve deck is connected with the valve seats through a pressing sleeve and tightly presses the valve seats; the valve deck is provided with an execution mechanism which is connected with the valve rod through a half nut; the valve rod and a valve flap are integrally connected; and the valve flap and the valve seats are matched, and when the valve flap moves in the valve seats, the circulation area can be changed. The high-pressure difference feed-regulating valve has the advantages that when the front and rear pressure difference of the regulating valve is a set value, and the flow is changed by changing the circulation area of a medium flowing through the regulating valve; and according to the high-pressure difference feed-regulating valve, the valve flap is regulated by the execution mechanism, and the passage area of the valve seats is controlled by using the relative positions of the valve flap and all the valve seats, so that the aim of controlling the flow can be fulfilled.
Description
Technical field
The utility model relates to a kind of modulating valve, especially a kind of high pressure difference water feed regulating valve.
Background technique
Modulating valve is mainly used in the industries such as power plant, petrochemical industry, papermaking.Along with the progressively production domesticization of domestic large-sized boiler design, technique, the valve of boiler matching is thereupon progressively production domesticization also.Modulating valve is installed on the water pipeline of boiler direct-contact desuperheater, is used for regulating injection flow rate, to reach the purpose of regulating boiler overheating steam temperature, also can be used for other boiler feed water pipelines, regulates feedwater flow.Modulating valve is the valve of requisite key in the boiler steam pipe.High pressure difference water feed regulating valve is widely used in the High Temperature High Pressure parameter Operating Condition as the substitute products of common modulating valve, effectively solves common modulating valve and easily produces the problems such as cavitation, noise and vibrations at high temperature and high pressure condition, satisfies the more and more higher requirement of user.
Summary of the invention
The utility model will solve the shortcoming of above-mentioned prior art, and a kind of high pressure difference water feed regulating valve of the user's of satisfying high parameter operating mode demand is provided.
The utility model solves the technological scheme that its technical problem adopts: this high pressure difference water feed regulating valve, comprise valve gap, valve body and valve rod, valve gap and valve body are bolted, be provided with valve seat in the valve body, valve gap is connected with valve seat by gland and with its compression, valve gap is provided with actuator, actuator is connected with valve rod by clip nut, valve rod and flap are integrally connected, and flap cooperates with valve seat and when flap moves, can change its circulation area in valve seat.
As preferably, valve seat comprises upper valve base, middle valve seat and the lower valve base that connects successively up and down.
As preferably, valve seat and flap surface of contact adopt different amount, can form linear sealing.
As preferably, be provided with stem packing between valve rod and the valve gap.
As preferably, be provided with stuffing box packing in the valve between valve seat and the valve body.
As preferably, be provided with wound gasket between valve gap and the valve body.
The effect that the utility model is useful is: when pressure reduction is for certain certain value before and after modulating valve, the circulation area of overregulating valve by changing MEDIA FLOW changes flow, high pressure difference water feed regulating valve is to regulate flap by actuator, utilize the relative position of flap and each valve seat to change the aisle spare that comes control valve seat, thereby reach the purpose of control flow.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Description of reference numerals: actuator 1, valve gap 2, stem packing 3, gland 4, valve body 5, upper valve base 6, middle valve seat 7, stuffing box packing 9 in the lower valve base 8, valve, wound gasket 10, flap 11, valve rod 12.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
Embodiment: such as Fig. 1, this high pressure difference water feed regulating valve comprises valve gap 2, valve body 5 and valve rod 12, and valve gap 2 and valve body 5 are bolted, and wherein valve body 5 adopts the smithwelding structure to make, and valve gap 2 adopts forging or foundry goods, can bear higher pressure medium.
Be provided with valve seat in the valve body 5, valve gap 2 is connected with valve seat by gland 4 and with its compression, valve gap 2 is provided with actuator 1, and actuator 1 is connected with valve rod 12 by clip nut, and valve rod 12 is integrally connected with flap 11.
Valve seat comprises upper valve base 6, middle valve seat 7 and the lower valve base 8 that connects successively up and down, can select different valve seats and corresponding flap 11 according to operating mode, to reach different Pressure Drops.Valve seat and flap 11 surface of contact adopt different amount, can form linear sealing, good seal performance.
The plunger of flap 11 can be different structural type according to the different flow characteristics design, to reach the Flow characteristicss such as linearity or equal percentage.Handle valve rod 12 by actuator 1, flap 11 is moved in valve seat, come the control media flow to change circulation area.High pressure difference water feed regulating valve adopts stream pass type structure, and medium enters behind the valve body 5 through gland 4, regulates through flap 11 again, flows out valve body 5 behind valve seat.
Be provided with stem packing 3 between valve rod 12 and the valve gap 2; Be provided with stuffing box packing 9 in the valve between valve seat and the valve body 5; Be provided with wound gasket 10 between valve gap 2 and the valve body 5, effectively stop valve in let out and leak outside.All component of pressure-difference valve have the characteristics of quick-replaceable, convenient disassembly.
According to the modulating valve working principle, can calculate the relation of flow, pressure drop and the circulation area of the fluid of the modulating valve of flowing through.According to fluid mechanics:
Wherein:
Q: mass of medium flow, t/h;
R: medium proportion, kg/m3;
μ A: flow coefficient;
A: modulating valve aisle spare, cm2;
Δ P: the pressure drop that MEDIA FLOW produces when modulating valve, MPa;
In addition to the implementation, the utility model can also have other mode of executions.All employings are equal to the technological scheme of replacement or equivalent transformation formation, all drop on the protection domain of the utility model requirement.
Claims (6)
1. high pressure difference water feed regulating valve, comprise valve gap (2), valve body (5) and valve rod (12), valve gap (2) and valve body (5) are bolted, it is characterized in that: described valve body is provided with valve seat in (5), valve gap (2) is connected with valve seat and with its compression by gland (4), valve gap (2) is provided with actuator (1), and actuator (1) is connected with valve rod (12) by clip nut, and valve rod (12) is integrally connected with flap (11); Flap (11) cooperates with valve seat and moves in valve seat by flap (11) and changes its circulation area.
2. high pressure difference water feed regulating valve according to claim 1 is characterized in that: described valve seat comprises upper valve base (6), middle valve seat (7) and the lower valve base (8) that connects successively up and down.
3. high pressure difference water feed regulating valve according to claim 1 is characterized in that: described valve seat and flap (11) surface of contact adopts different amount also to form linear sealing.
4. high pressure difference water feed regulating valve according to claim 1 is characterized in that: be provided with stem packing (3) between described valve rod (12) and the valve gap (2).
5. high pressure difference water feed regulating valve according to claim 1 is characterized in that: be provided with stuffing box packing (9) in the valve between described valve seat and the valve body (5).
6. high pressure difference water feed regulating valve according to claim 1 is characterized in that: be provided with wound gasket (10) between described valve gap (2) and the valve body (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220602306 CN202901422U (en) | 2012-11-14 | 2012-11-14 | High-pressure difference feed-regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220602306 CN202901422U (en) | 2012-11-14 | 2012-11-14 | High-pressure difference feed-regulating valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202901422U true CN202901422U (en) | 2013-04-24 |
Family
ID=48122093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220602306 Expired - Lifetime CN202901422U (en) | 2012-11-14 | 2012-11-14 | High-pressure difference feed-regulating valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202901422U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103591353A (en) * | 2013-11-20 | 2014-02-19 | 无锡智能自控工程股份有限公司 | High-pressure and micro-flow tandem type regulating valve |
| CN104455469A (en) * | 2014-09-29 | 2015-03-25 | 北京航天动力研究所 | Throttling serial type multistage pressure reduction and adjustment valve |
-
2012
- 2012-11-14 CN CN 201220602306 patent/CN202901422U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103591353A (en) * | 2013-11-20 | 2014-02-19 | 无锡智能自控工程股份有限公司 | High-pressure and micro-flow tandem type regulating valve |
| CN103591353B (en) * | 2013-11-20 | 2015-12-30 | 无锡智能自控工程股份有限公司 | High pressure micro-flow tandem type modulating valve |
| CN104455469A (en) * | 2014-09-29 | 2015-03-25 | 北京航天动力研究所 | Throttling serial type multistage pressure reduction and adjustment valve |
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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: 20130424 |
|
| CX01 | Expiry of patent term |