CN208651654U - A kind of erosion-protection high-pressure bypass valve structure - Google Patents
A kind of erosion-protection high-pressure bypass valve structure Download PDFInfo
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- CN208651654U CN208651654U CN201821126323.5U CN201821126323U CN208651654U CN 208651654 U CN208651654 U CN 208651654U CN 201821126323 U CN201821126323 U CN 201821126323U CN 208651654 U CN208651654 U CN 208651654U
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- valve
- equalizing
- erosion
- pressure bypass
- seat
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Abstract
The utility model discloses a kind of erosion-protection high-pressure bypass valve structure, including main vapour valve and the equalizing valve door that main vapour valve front end is arranged in, wherein, main vapour valve includes stop valve core, stop valve seat and the throttle sleeve being set in outside the stop valve core, equalizing valve centering spring is arranged on the equalizing valve core of equalizing valve, one end of above-mentioned equalizing valve centering spring can be connected on the equalizing valve seat of equalizing valve door；Metal protection protector is additionally provided in the outside of stop valve core; the metal protection protector is along the valve core sealed cover axially beyond stop valve core; simultaneously; the annular groove matched with the metal protection protector is additionally provided on stop valve seat; when valve is closed; the sealing surface of seat of the valve core sealed cover and the stop valve seat is in close contact, and the metal protection protector is entrenched in the annular groove.The erosion-protection high-pressure bypass valve structure can effectively prevent valve sealing face and valve core sealed cover by wet-hot steam blow loss, avoid valves leakage.
Description
Technical field
The utility model relates to regulating valve field, in particular to a kind of high pressure turbine by valve mechanism.
Background technique
Hp by-pass system is the important equipment of steam turbine, to the starting performance for improving Steam Turbine, is protecting unit just
Often operation has very important effect.Hp by-pass system is by components such as high pressure bypass valve, spray water control valve and water spray isolating valves
Composition.The gas production for the balance boiler that wherein high pressure bypass valve can be in due course and the air consumption of steam turbine, stablize boiler and steamer
The operation of machine has the safe regulatory functions such as starting and overflow.
During unit starting, high steam enters condenser after passing through high pressure turbine by pressure and temperature reducing, and above-mentioned high pressure is steamed
Band water in vapour has a large amount of wet-hot steams to wash away the spool and valve seat of high pressure bypass valve when by high pressure bypass valve, also, by
It is fast in vapor (steam) velocity, it is very big to the scouring force of spool and valve seat when being mingled with a large amount of droplets and foreign matter in steam, and due to opening
The machine time is long, often once open machine process just the sealing surface of valve is blown it is bad.It opens machine and completes late gate closing, but due to valve
The sealing surface of seat and spool can not palette, lead to valves leakage, so cause after high side valve temperature to severely exceed (temperature can
Up to 100 DEG C to 130 DEG C), it is therefore desirable to it puts into desuperheating water and cools down, seriously affected the thermal efficiency of unit and increased energy
Consumption.Simultaneously as temperature is exceeded for a long time after high side valve, pipeline aging is also accelerated, the risks such as pipeline breaking is introduced, influences unit
The safety of operation.
What the prior art generallyd use is to cut down valve seat from valve body after spool and valve seat are by blow loss, is repaired
It is welded again after the sealing surface of spool and valve seat, still, will affect welding performance in same position multiple welding, and repeatedly repair
After multiple, sealing surface can be more and more wider, loses the ability of protection spool and valve seat, leaves security risk.
In addition, high side valve valve generallys use equalizing valve structure, since there are idle stroke, the positions of equalizing valve door in equalizing valve
It is poor to set centering, it is unstable when can generate leakage, and start and close, so that causing high side valve valve core sealed cover and valve seat close
The vibration and abrasion of cover.
To sum up, it needs to develop a kind of with good flushing preventing function and the high pressure bypass valve that can steadily open, close
Door, to solve to leak in high pressure bypass valve and the problems such as temperature exceeding standard, reduce heat loss after valve and reduce maintenance and repair cost.
Summary of the invention
In view of the above problems in the prior art, the purpose of this utility model is to provide a kind of erosion-protection high-pressure bypass valves
Structure, the valve mechanism have good leakproofness, erosion control corrosion peace stability.
In order to solve the above-mentioned technical problem, the specific technical solution of the utility model is as follows:
A kind of erosion-protection high-pressure bypass valve structure, including main vapour valve and the equalizing valve that main vapour valve front end is arranged in
Door, the main vapour valve include stop valve core, stop valve seat and the throttle sleeve being set in outside the stop valve core, described pre-
It opens and is arranged with equalizing valve centering spring on the equalizing valve core of valve, one end of above-mentioned equalizing valve centering spring can be connected to equalizing valve
Equalizing valve seat on；
Metal protection protector is additionally provided on the stop valve outer core, the metal coating is set on the stop valve core
Between throttle sleeve, above-mentioned metal protection protector is along the valve core sealed cover axially beyond the stop valve core, the stop valve seat
On be provided with the annular groove matched with the metal protection protector, when valve is closed, the valve core sealed cover and the main vapour
The sealing surface of seat of valve seat is in close contact, and the metal protection protector is entrenched in the annular groove.
Further, the annular groove is located at the outside of the sealing surface of seat.
Further, also there is loop protrusion, the annular projection is located at described on the stop valve seat sealing surface
Between annular groove and the sealing surface of seat.
Further, the metal coating puts on the protective case notch being also provided with annular projection cooperation, main vapour
When valve is closed, the annular projection on the sealing surface of seat can be entrenched in the protective case notch.
Specifically, the protective case notch is provided on the inner wall of the metal protection protector bottom end.
Preferably, the metal protection protector is tubular structure.
Preferably, the equalizing valve centering spring is the butterfly spring being set in outside the equalizing valve core.
Preferably, the metal protection protector is stellite alloy protecting set.
Further, multiple flow through-holes are offered on the throttle sleeve.
The another aspect of the utility model protects a kind of high pressure bypass valve, which includes above-mentioned erosion-protection high-pressure
Bypass valve structure.
By adopting the above technical scheme, erosion-protection high-pressure bypass valve structure described in the utility model has following beneficial to effect
Fruit:
(1) metal protection protector is equipped on stop valve core, it is ensured that do not rush directly by the moist steam or foreign matter of valve
Brush is reliable to guarantee valve core sealed cover not by blow loss on the valve core sealed cover of stop valve core.
(2) structure and manufacturing process of metal protection protector are simple, are made of hard alloy, durable, Anti-erosion energy
Power is strong.
(3) there is annular projection on the outside of the sealing surface of seat of stop valve seat, which can prevent sealing surface of seat wet
Hot steam blow loss guarantees the leakproofness of stop valve core and stop valve seat, prevents leakage in steam, reduces temperature after valve.
(4) it is arranged with equalizing valve centering spring on valve core of pre-inlet valve, increases the accuracy of equalizing valve door centering, guarantee is opened in advance
Valve seat is overlapped with the sealing surface height of spool, so that balance hole be made not generate leakage, when valve is closed, spool is in executing agency
It needs to overcome spring top power under thrust, improves stationarity when equalizing valve opens and closes, avoid opening in advance caused by vibration
The abrasion of valve sealing face and main vapour valve sealing surface extends the service life of valve.
Detailed description of the invention
It, below will be to institute in embodiment or description of the prior art in order to illustrate more clearly of the technical solution of the utility model
Attached drawing to be used is needed to be briefly described.It should be evident that the accompanying drawings in the following description is only some of the utility model
Embodiment for those of ordinary skill in the art without creative efforts, can also be attached according to these
Figure obtains other attached drawings.
Fig. 1 is the lateral sectional view of erosion-protection high-pressure bypass valve structure disclosed in embodiment；
In figure: 11- stop valve core, 12- stop valve seat, 13- throttle sleeve, 14- metal protection protector, 15- valve core sealed cover,
16- annular groove, 17- sealing surface of seat, 18- annular projection, 19- protective case notch, 21- equalizing valve core, the centering of 22- equalizing valve
Spring, 130- flow through-hole.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are in the premise for not making creative work
Under every other embodiment obtained, fall within the protection scope of the utility model.
It should be noted that the specification and claims of the utility model and term " first " in above-mentioned attached drawing,
" second " etc. is to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that in this way
The data used are interchangeable under appropriate circumstances, so that the embodiments of the present invention described herein can be in addition at this
In illustrate or description those of other than sequence implement.In addition, term " includes " and " having " and their any deformation, meaning
Figure be to cover it is non-exclusive include, for example, containing the process, method of a series of steps or units, device, product or equipment
Those of be not necessarily limited to be clearly listed step or unit, but may include be not clearly listed or for these processes,
The intrinsic other step or units of method, product or equipment.
Embodiment
A kind of erosion-protection high-pressure bypass valve structure, including main vapour valve and the equalizing valve that main vapour valve front end is arranged in
Door, the main vapour valve includes stop valve core 11, stop valve seat 12 and the throttle sleeve being set in outside the stop valve core 11
13, equalizing valve centering spring 22, one end of above-mentioned equalizing valve centering spring 22 are arranged on the equalizing valve core 21 of the equalizing valve
It can be connected on the equalizing valve seat of equalizing valve door；
Metal protection protector 14,14 edge of metal protection protector are additionally provided between the stop valve core 11 and throttle sleeve 13
Axially beyond the valve core sealed cover 15 of the stop valve core 11, it is provided on the stop valve seat 12 and the metal protection protector 14
The annular groove 16 matched, when valve is closed, the sealing surface of seat 17 of the valve core sealed cover 15 and the stop valve seat 12
It is in close contact, the metal protection protector 14 is entrenched in the annular groove 16.
Multiple flow through-holes 130 are offered on above-mentioned throttle sleeve 13.
Wherein, the bottom surface of stop valve core 11 be plane, bottom be cone cell, i.e., the bottom radial diameter of stop valve core 11 by
Decrescence small, sealing surface of seat 17 is matched with valve core sealed cover 15.
Specifically, annular groove 16 is located at the outside of the sealing surface of seat 17.
In a specific embodiment, also there is a loop protrusion 18, the ring-type on the sealing surface of seat 17
Protrusion 18 also has and the ring-type on the metal protection protector 14 between the annular groove 16 and sealing surface of seat 17
One circle protective case notch 19 of 18 cooperation of protrusion, the protective case notch 19 are provided with the inner wall of 14 bottom end of metal protection protector
On, when main vapour valve is closed, the annular projection 18 on the sealing surface of seat 17 can be entrenched in the protective case notch 19.
The material of the annular projection 18 be hard alloy, it is preferable that above-mentioned annular projection 18 be stellite be made or
Heap is welded with stellite protective layer.
Preferably, above-mentioned metal protection protector 14 is tubular structure, and metal protection protector 14 is set in the outer wall of stop valve core 11
On, and the bottom end of metal protection protector 14 is lower than the bottom end of stop valve core 11.Metal protection protector 14 is directly on stop valve core 11
It is machined into, or is welded on the outer wall of stop valve core 11 after machine-shaping.
The equalizing valve centering spring 22 is the butterfly spring being set in outside the equalizing valve core 21.Equalizing valve centering
Spring 22 is filled with existing gap between equalizing valve core and outside, even if valve mechanism is mounted laterally, the equalizing valve core 21
Radial displacement will not be generated.Under the balanced action of 22 elastic force of thrust and equalizing valve centering spring of executing agency, equalizing valve energy
Enough steady unlatchings；When equalizing valve is closed, spool needs to overcome spring top power, equalizing valve core under executing agency's thrust
Steadily it can be bonded and seal with the sealing surface of valve seat.
Preferably, the metal protection protector 14 is stellite alloy protecting set.
When main vapour valve is closed, the bottom end of metal protection protector 14 is entrenched in the annular groove 16 of stop valve seat 12, main vapour
Annular projection 18 on valve seat 12 is entrenched in the protective case notch 19 on 14 inner wall of metal protection protector；When main vapour valve is opened,
Wet-hot steam is flushed on metal protection protector 14 and annular projection 18 after passing through flow through-hole 130, valve core sealed cover 15 and valve seat
Sealing surface 17 is protected against the erosion of wet-hot steam by above structure, avoids leaking in steam because of caused by sealing face damage,
Effectively by temperature after valve be reduced to 50 DEG C hereinafter, extend high pressure turbine by valve and associated conduit service life.
The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all practical at this
Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model
Within the scope of shield.
Claims (10)
1. a kind of erosion-protection high-pressure bypass valve structure, including main vapour valve and the equalizing valve door that main vapour valve front end is arranged in,
The main vapour valve includes stop valve core (11), stop valve seat (12) and the throat bushing for being set in stop valve core (11) outside
Cylinder (13), which is characterized in that
It is arranged with equalizing valve centering spring (22) on the equalizing valve core (21) of the equalizing valve, above-mentioned equalizing valve centering spring (22)
One end can be connected on the equalizing valve seat of the equalizing valve door；
It is additionally provided with metal protection protector (14) on the outer wall of the stop valve core (11), the metal protection protector (14) is located at the master
Between steam valve core (11) and throttle sleeve (13), above-mentioned metal protection protector (14) is along the valve axially beyond the stop valve core (11)
Core sealing surface (15) offers the annular groove matched with the metal protection protector (14) on the stop valve seat (12)
(16), when valve is closed, the sealing surface of seat (17) of the valve core sealed cover (15) and the stop valve seat (12) is in close contact,
The metal protection protector (14) is entrenched in the annular groove (16).
2. erosion-protection high-pressure bypass valve structure according to claim 1, which is characterized in that annular groove (16) position
In the outside of the sealing surface of seat (17).
3. erosion-protection high-pressure bypass valve structure according to claim 1, which is characterized in that the stop valve seat sealing surface
(17) also have a loop raised (18) on, the annular projection (18) is located at the annular groove (16) and the valve seat is close
Between cover (17).
4. erosion-protection high-pressure bypass valve structure according to claim 3, which is characterized in that the metal protection protector (14)
On be also provided with the annular projection (18) cooperation protective case notch (19), main vapour valve be closed when, the annular projection
(18) it can be entrenched in the protective case notch (19).
5. erosion-protection high-pressure bypass valve structure according to claim 3, which is characterized in that the protective case notch (19)
It is arranged on the inner wall of the metal protection protector (14) bottom end.
6. erosion-protection high-pressure bypass valve structure according to claim 1, which is characterized in that the metal protection protector (14)
For tubular structure.
7. erosion-protection high-pressure bypass valve structure according to claim 1, which is characterized in that the equalizing valve centering spring
(22) butterfly spring to be set in equalizing valve core (21) outside.
8. erosion-protection high-pressure bypass valve structure according to claim 1, which is characterized in that the metal protection protector (14)
For stellite alloy protecting set.
9. erosion-protection high-pressure bypass valve structure according to claim 1, which is characterized in that on the throttle sleeve (13)
Offer multiple flow through-holes (130).
10. a kind of high pressure bypass valve, including according to claim 1 to erosion-protection high-pressure bypass valve described in any one of 9
Door.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821126323.5U CN208651654U (en) | 2018-07-17 | 2018-07-17 | A kind of erosion-protection high-pressure bypass valve structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821126323.5U CN208651654U (en) | 2018-07-17 | 2018-07-17 | A kind of erosion-protection high-pressure bypass valve structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208651654U true CN208651654U (en) | 2019-03-26 |
Family
ID=65785221
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821126323.5U Active CN208651654U (en) | 2018-07-17 | 2018-07-17 | A kind of erosion-protection high-pressure bypass valve structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN208651654U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110805697A (en) * | 2019-11-26 | 2020-02-18 | 上海发电设备成套设计研究院有限责任公司 | Integral self-protection sealing surface structure of regulating valve |
| CN110805713A (en) * | 2019-11-26 | 2020-02-18 | 上海发电设备成套设计研究院有限责任公司 | Split type self preservation of governing valve protects sealed face structure |
| CN111520482A (en) * | 2020-05-08 | 2020-08-11 | 合肥通用机械研究院有限公司 | Emptying stop valve |
| CN117432813A (en) * | 2023-12-19 | 2024-01-23 | 成都乘风阀门有限责任公司 | Spring type multi-stage throttling emptying valve |
-
2018
- 2018-07-17 CN CN201821126323.5U patent/CN208651654U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110805697A (en) * | 2019-11-26 | 2020-02-18 | 上海发电设备成套设计研究院有限责任公司 | Integral self-protection sealing surface structure of regulating valve |
| CN110805713A (en) * | 2019-11-26 | 2020-02-18 | 上海发电设备成套设计研究院有限责任公司 | Split type self preservation of governing valve protects sealed face structure |
| CN111520482A (en) * | 2020-05-08 | 2020-08-11 | 合肥通用机械研究院有限公司 | Emptying stop valve |
| CN111520482B (en) * | 2020-05-08 | 2022-02-11 | 合肥通用机械研究院有限公司 | Emptying stop valve |
| CN117432813A (en) * | 2023-12-19 | 2024-01-23 | 成都乘风阀门有限责任公司 | Spring type multi-stage throttling emptying valve |
| CN117432813B (en) * | 2023-12-19 | 2024-03-15 | 成都乘风阀门有限责任公司 | Spring type multi-stage throttling emptying valve |
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