CN203809730U - Double-seat throttling guide-type adjusting steam valve - Google Patents
Double-seat throttling guide-type adjusting steam valve Download PDFInfo
- Publication number
- CN203809730U CN203809730U CN201420261092.4U CN201420261092U CN203809730U CN 203809730 U CN203809730 U CN 203809730U CN 201420261092 U CN201420261092 U CN 201420261092U CN 203809730 U CN203809730 U CN 203809730U
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- throttling
- valve disc
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- 238000007789 sealing Methods 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000005457 optimization Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000008685 targeting Effects 0.000 description 1
- 238000005493 welding type Methods 0.000 description 1
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- Lift Valve (AREA)
Abstract
The utility model relates to the field of adjusting steam valves, in particular to a double-seat throttling guide-type adjusting steam valve which is simple in structure, small in valve disc vibration, accurate in small flow control, small in closed-state air leakage quantity and small in influence on other parts. The double-seat throttling guide-type adjusting steam valve comprises a valve shell, a valve rod, a valve cover, a flange cover and a valve seat, the flange cover is arranged at the bottom of the valve shell, the valve cover which is sealed relatively is arranged at the upper end of the valve shell, the valve rod penetrates the valve cover to be connected with a valve disc inside the valve shell, the valve disc is of a dumbbell-type double-seat guide-type structure and is matched with the valve seat arranged between the valve disc and the valve shell, a throttling ring is arranged on the outer side of a bottom contact face of the valve seat, and the throttling ring and the valve disc are matched to form a throttling structure. Accurate control on small flow is realized under the control of a hydraulic actuator by slightly opening a lower valve disc, effective control on air leakage of the double-seat adjusting valve can be realized, and a gap between the valve disc and the valve seat is small, so that vibration of the valve disc is inhibited.
Description
Technical field
The utility model relates to servo valve field, especially a kind of for controlling the two-seater throttling guiding type servo valve of steam flow.
Background technique
Servo valve is simple in structure at present, and on the equipment of two-seater servo valve control, valve turns down, and steam flow diminishes, and often cannot under small flow, accurately control the gas leakage problem that still has the factors such as Yin Wendu to cause in the time that two-seater adjusts valve to close completely; Valve is opened greatly, vapor stream quantitative change is large, often cause valve disc shake and finally affect working life of valve disc and valve seat, valve disc shake simultaneously also can be delivered to bindiny mechanism by valve rod and cause link wearing and tearing, so can cause valve disc cannot effectively control the flow of steam for a long time, even cause oil engine to produce wearing and tearing, and then affect the work of steam turbine.
Model utility content
The purpose of this utility model is the deficiency in order to solve above-mentioned technology and provide a kind of simple in structure, and valve disc shake is few, and Small Flow Control is accurate, and closed condition air leakage is few, simultaneously the two-seater throttling guiding type servo valve little to other component affects.
In order to achieve the above object, the two-seater throttling guiding type servo valve that the utility model is designed, it comprises valve casing, valve rod, valve gap, blind flange and valve seat, blind flange is arranged on the bottom of valve casing, be provided with the valve gap of relative sealing in the upper end of valve casing, described valve rod is connected with the valve disc that is arranged on valve casing inside through valve gap, valve disc is dumbbell shape two-seater guidance type structure, and coordinate with the valve seat being arranged between valve disc and valve casing, outside at the bottom of valve seat surface of contact is provided with restrictor ring, restrictor ring coordinates formation throttle structure with valve disc, between valve rod and valve gap, be provided with valve guide, be provided with the first fastener rings at the top of valve rod, the first fastener rings is fixed on a side of oil baffle disc, the opposite side of oil baffle disc is connected with oil engine by the second fastener rings, oil engine is fixed on valve casing top.
As optimization, between valve rod and valve disc, being connected by tightening nut and pin, is Spielpassung between valve rod and tightening nut, is interference fit between valve rod and pin, between pin and butterfly valve, be Spielpassung, tightening nut is fixed on valve rod and pin by screw thread the upper end of valve disc.
As optimization, between valve rod and the first fastener rings, be interference fit, interference fit between the second fastener rings and oil engine, the first fastener rings and the second fastener rings are all bolted on oil baffle disc.
As optimization, valve rod bottom is sphere, is that point contacts between sphere and valve disc.
Coordinate the stroke of controlling valve disc with valve disc by restrictor ring, under a throttling of sealing surface and the second throttle of restrictor ring act on simultaneously, make valve disc possess good restriction characteristic in initial little stroke state, can stably accurately control small flow, not affect the steam flow fluidised form under large flow status simultaneously.
In order to make valve disc improve vibration state; the periphery of the upper and lower valve of the utility model design valve disc is guide surface; valve disc is total travel guiding in valve seat; make the valve disc moment in single-degree-of-freedom state; and along with increasing valve disc, stroke can progressively enter the all-round guiding protection of valve seat anchor ring; reduce the lateral impact of steam flow to valve disc, thus the rotation that alleviates valve disc.
In order to reduce the impact on valve rod of steam flow and valve disc, in the utility model design, valve rod and valve disc are in two-part structure, and both connect by tightening nut and locating stud.The motion design of valve disc single-degree-of-freedom, makes valve rod can not be subject to the lateral force of valve disc, also stop simultaneously valve rod and valve disc entirety add man-hour large scale to change the stress bringing concentrated.The targeting part that rise on the valve seat top of full guiding type not only plays guide-localization effect for upper valve disc, has also sheltered from most of side zones of valve rod simultaneously, stops high speed steam flow directly to impact in valve rod side, thereby improves the force-bearing situation of valve rod.
Can control the movement of valve disc in order to make control unit, thereby the object that reaches accurate control steam flow amount, valve rod upper end is connected with fastener rings, and fastener rings is provided with oil baffle disc, on oil baffle disc, be directly connected with oil engine by fastener rings, oil engine is fixed on valve casing top by valve gap entirety.
The two-seater throttling guiding type servo valve that the utility model obtains, the similar dumbbell of valve disc, the throttle structure that the restrictor ring of valve seat bottom and lower valve disc form, small unlatching by lower valve disc under the control of oil engine realizes the accurate control to small flow, realizes effective control of two-seater being adjusted to valve gas leak phenomenon by the surface seal structure of lower valve disc and valve seat and the Spielpassung of upper valve disc and valve seat simultaneously.Valve disc and valve seat form guide structure by Spielpassung, because the gap of the two is little, the shake of valve disc have been produced to inhibitory action, have improved the shake of whole valve.Between valve rod and valve disc, without lateral force relation, avoid valve rod to produce wearing and tearing because of the small shake of valve disc.When the manufacturing, can also, by valve rod overstriking, improve intensity, when design, go back the lateral openings size of capable of regulating valve disc size and valve seat, to adapt to different traffic demands.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the enlarged diagram at restrictor ring of the present utility model place.
Embodiment
Below by embodiment, the utility model will be further described by reference to the accompanying drawings.
Embodiment 1.
As shown in Figure 1, the two-seater throttling guiding type servo valve that the present embodiment is described, it comprises valve casing 2, valve rod 7, valve gap 8, blind flange 1 and valve seat 3, blind flange 1 is arranged on the bottom of valve casing 2, be provided with the valve gap 8 of relative sealing in the upper end of valve casing 2, described valve rod 7 is connected with the valve disc 4 that is arranged on valve casing 2 inside through valve gap 8, valve disc 4 is dumbbell shape two-seater guidance type structure, and coordinate with the valve seat 3 being arranged between valve disc 4 and valve casing 2, outside at the bottom of valve seat 3 surface of contact is provided with restrictor ring 14, restrictor ring 14 coordinates formation throttle structure with valve disc 4, between valve rod 7 and valve gap 8, be provided with valve guide 9, be provided with the first fastener rings 10 at the top of valve rod 7, the first fastener rings 10 is fixed on a side of oil baffle disc 11, the opposite side of oil baffle disc 11 is connected with oil engine 13 by the second fastener rings 12, oil engine 13 is fixed on valve casing 2 tops, between valve rod 7 and valve disc 4, be connected by tightening nut 6 and pin 5, between valve rod 7 and tightening nut 6, it is Spielpassung, between valve rod 7 and pin 5, being interference fit, is Spielpassung between pin 5 and butterfly valve 4, and tightening nut 6 is fixed on valve rod 7 and pin 5 by screw thread the upper end of valve disc 4, between valve rod 7 and the first fastener rings 10, be interference fit, interference fit between the second fastener rings 12 and oil engine 13, the first fastener rings 10 and the second fastener rings 12 are all bolted on oil baffle disc 11, valve rod 7 bottoms are sphere, are that point contacts between sphere and valve disc 4.
Simultaneously according to the difference of cylinder structure and unit general arrangement requirement, in servo valve valve casing 2 structures, there are two kinds of corresponding modification: a kind of is to adjust valve to have independent valve casing 2, and the outlet(discharge) flange of valve casing 2 is connected with cylinder by bolt, the second is that servo valve is arranged in outside turbine body, between the import and export of valve casing 2 and cylinder, be connected by pipeline, interface can be that flange type also can adopt welding type.No matter any form, the structure of modulating valve and said structure are roughly the same.
When work, under static state, the pretightening force of oil engine 13 is crushed on valve seat 3 valve disc 4 by fastener rings 12, oil baffle disc 11, fastener rings 10 and valve rod 7.Molar behavior mechanism is direct-acting type, so in the time that oil engine 13 moves according to control unit instruction, valve disc has just produced corresponding lifting action, according to the instruction of oil engine 13 suitable open, close servo valve, or the steam flow amount that increases or dwindle servo valve.
As shown in Figure 2, in figure, main expression is lower half portion of valve disc 4 and the matching relationship of valve seat 3, and restrictor ring 14 is on valve seat 3, and the bottom anchor ring of valve disc 4 and valve seat 3 form lower valve disc 4 sealing surfaces, and restrictor ring 14 forms throttle structure with valve disc 4.
Claims (4)
1. a two-seater throttling guiding type servo valve, it comprises valve casing, valve rod, valve gap, blind flange and valve seat, blind flange is arranged on the bottom of valve casing, it is characterized in that: the valve gap that is provided with relative sealing in the upper end of valve casing, described valve rod is connected with the valve disc that is arranged on valve casing inside through valve gap, valve disc is dumbbell shape two-seater guidance type structure, and coordinate with the valve seat being arranged between valve disc and valve casing, outside at the bottom of valve seat surface of contact is provided with restrictor ring, restrictor ring coordinates formation throttle structure with valve disc, between valve rod and valve gap, be provided with valve guide, be provided with the first fastener rings at the top of valve rod, the first fastener rings is fixed on a side of oil baffle disc, the opposite side of oil baffle disc is connected with oil engine by the second fastener rings, oil engine is fixed on valve casing top.
2. a kind of two-seater throttling guiding type servo valve according to claim 1, it is characterized in that: between valve rod and valve disc, be connected by tightening nut and pin, it between valve rod and tightening nut, is Spielpassung, it between valve rod and pin, is interference fit, between pin and butterfly valve, be Spielpassung, tightening nut is fixed on valve rod and pin by screw thread the upper end of valve disc.
3. a kind of two-seater throttling guiding type servo valve according to claim 1, it is characterized in that: between valve rod and the first fastener rings, be interference fit, interference fit between the second fastener rings and oil engine, the first fastener rings and the second fastener rings are all bolted on oil baffle disc.
4. according to a kind of two-seater throttling guiding type servo valve described in claim 1 or 2 or 3, it is characterized in that: valve rod bottom is sphere, is that point contacts between sphere and valve disc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420261092.4U CN203809730U (en) | 2014-05-21 | 2014-05-21 | Double-seat throttling guide-type adjusting steam valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420261092.4U CN203809730U (en) | 2014-05-21 | 2014-05-21 | Double-seat throttling guide-type adjusting steam valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203809730U true CN203809730U (en) | 2014-09-03 |
Family
ID=51448480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420261092.4U Expired - Lifetime CN203809730U (en) | 2014-05-21 | 2014-05-21 | Double-seat throttling guide-type adjusting steam valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203809730U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104033615A (en) * | 2014-05-21 | 2014-09-10 | 杭州中能汽轮动力有限公司 | Double-seat throttling guide type governing steam valve |
| CN108533776A (en) * | 2018-04-27 | 2018-09-14 | 林明 | A kind of Petroleum Production safety valve threshold value adjusting method |
| CN110206893A (en) * | 2019-06-10 | 2019-09-06 | 刘艳文 | A kind of shut-off valve convenient for adjusting |
| EP3875812A1 (en) * | 2020-03-05 | 2021-09-08 | Siemens Aktiengesellschaft | Double seated valve arrangement for fluid power equipment |
-
2014
- 2014-05-21 CN CN201420261092.4U patent/CN203809730U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104033615A (en) * | 2014-05-21 | 2014-09-10 | 杭州中能汽轮动力有限公司 | Double-seat throttling guide type governing steam valve |
| CN108533776A (en) * | 2018-04-27 | 2018-09-14 | 林明 | A kind of Petroleum Production safety valve threshold value adjusting method |
| CN108533776B (en) * | 2018-04-27 | 2019-09-20 | 江苏嘉胜石油科技有限公司 | A kind of Petroleum Production safety valve threshold value adjusting method |
| CN110206893A (en) * | 2019-06-10 | 2019-09-06 | 刘艳文 | A kind of shut-off valve convenient for adjusting |
| EP3875812A1 (en) * | 2020-03-05 | 2021-09-08 | Siemens Aktiengesellschaft | Double seated valve arrangement for fluid power equipment |
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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: 20140903 |