CN202674810U - High-pressure steam drain valve - Google Patents
High-pressure steam drain valve Download PDFInfo
- Publication number
- CN202674810U CN202674810U CN 201220266525 CN201220266525U CN202674810U CN 202674810 U CN202674810 U CN 202674810U CN 201220266525 CN201220266525 CN 201220266525 CN 201220266525 U CN201220266525 U CN 201220266525U CN 202674810 U CN202674810 U CN 202674810U
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- CN
- China
- Prior art keywords
- valve
- pressure steam
- high pressure
- ring
- steam drainage
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- Expired - Lifetime
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Abstract
The utility model discloses a high-pressure steam drain valve which comprises a valve body, a valve seat arranged in a valve cavity, a valve clack matched with the valve seat to seal, and a valve rod connected with the valve clack. A ring-shaped cofferdam is fixed on the inner surface of the valve seat and provided with a ring-shaped throttling depressurization groove. According to the steam drain valve with the structure, due to arrangements of the ring-shaped cofferdam and the ring-shaped throttling depressurization groove on the ring-shaped cofferdam, pressure born by a sealing face is enabled to descend slowly so that the phenomena of cavitation erosion and flash evaporation are prevented from occurring. Consequently, the valve is improved in overall performance, prolonged in service life, and reduced in utilization and maintenance cost.
Description
Technical field
The utility model relates to a kind of for the Automatic steam trap Trap under the high pressure operating mode.
Background technique
The effect of Automatic steam trap Trap (abbreviation drain valve) is steam, water of condensation or the steam-water twin phases medium of getting rid of in heating plant or the steam line, requires sealing reliable, closes tightly and does not leak.
Existing drain valve roughly has two kinds of structural types: a kind of is that valve adopts two-stage throttle valve valve structure form when little aperture: the guiding inner circle straight section in the valve sealing face downstream by flap and valve pocket consists of second level throttling.Another kind is to increase throttle element buck configuration form in valve sealing face lower exit changeover portion.The working principle of two kinds of structures all is in the sealing surface downstream second level throttling to be set, and adopts the second depressurized measure, and pressure reduces step by step, every one-level consumes part energy, makes next stage pressure relatively low, has reduced next stage pressure reduction, it is low that pressure recovers, and can alleviate the generation of cavitation erosion.
Existing structural type high velocity vapor stream under the High Pressure Difference operating mode can cause wearing and tearing and the destruction of sealing surface to the washing away of sealing surface.Specifically, cavitations and flashing can damaging valve sealing face during the little aperture of valve; During valve closing in the medium large granular impurity can weigh sealing surface wounded.Behind the sealing surface of seat damage inactivation, maintenance and replacing are difficult in addition.
The model utility content
For the technical problem of above-mentioned existence, the utility model provides a kind of high pressure steam drainage valve, adopts the form of multistage throttle, greatly reduce high velocity vapor stream under the High Pressure Difference operating mode to large granular impurity in the damage of sealing surface and the medium to the destruction of sealing surface.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is:
A kind of high pressure steam drainage valve comprises valve body, is installed on the interior valve seat of valve pocket, cooperates with valve seat and carry out the flap of seal operation, the valve rod that is connected with flap; Be fixed with annular weir on the described valve seat interior surface; Have the ring-shaped throttling relief groove on the described cofferdam.
As a kind of preferred, described ring-shaped throttling relief groove be about twice.
As a kind of improvement, described flap outer surface is provided with annular maze trough.
Improve as another kind, the annular that is fixedly installed porous around described valve rod in the valve pocket is shrouded.
As above-mentioned improved a kind of preferred, described shrouding is provided with three from inside to outside.
Further improve as above-mentioned improvement, comprise that also is used for a fastening hold down gag that shrouds, described hold down gag comprises bolt, pendant collet, dunnage, platen; Described pendant collet is fixed on the valve body; Described dunnage utilizes screw to be placed on the bolt, and its upper-end surface contacts with the pendant collet lower end surface; Described bolt underpart contacts with platen; Described platen contacts with shrouding.
Usefulness of the present utility model is:
Automatic steam trap Trap with said structure, because the setting of annular reducing pressure by regulating flow groove on cofferdam and the cofferdam, so that the pressure that sealing surface bears descends the cavitation erosion of avoiding and the generation of steam flashing gently.The raising of valve overall performance also prolongs working life of valve, reduces the cost of valve use and maintenance.The flap outer surface is provided with the setting of annular maze trough, further expenditure and pressure.The annular of the porous that is fixedly installed around described valve rod in the valve pocket is shrouded, and can effectively reduce medium by the pressure at sealing pair position, reduces washing away and wear and tear sealing surface.Hold down gag had both compressed and had shrouded, and indirectly compressed again valve seat, only need to unclamp bolt in the time of dismounting and just can change valve seat.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is A place enlarged view.
Mark among the figure: 1 valve body, 2 valve seats, 3 cofferdam, 4 flaps, 5 shroud, 6 valve pockets, 7 valve rods, 8 maze troughs, 9 reducing pressure by regulating flow grooves, 10 bolts, 11 pendant collets, 12 dunnages, 13 platens.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail.
In order to make the purpose of this utility model, technological scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
Shown in Fig. 1-2:
The utility model comprises valve body 1, be installed on valve seat 2 in the valve pocket 6, carry out the flap 4 of seal operation, the valve rod 7 that is connected with flap with valve seat 2 cooperations; Be fixed with annular weir 3 on described valve seat 2 internal surfaces; Have ring-shaped throttling relief groove 9 on the described cofferdam 3.Described ring-shaped throttling relief groove 9 is twice up and down.Flap 4 outer surfaces are provided with annular maze trough 8.The annular that is fixedly installed porous around described valve rod 7 in the valve pocket 6 shrouds 5, shrouds 5 and is provided with from inside to outside three.Can also arrange one and be used for fastening 5 the hold down gag that shrouds, comprise bolt 10, pendant collet 11, dunnage 12, platen 13; Pendant collet 11 is fixed on the valve body 1; Dunnage 12 also utilizes screw to be placed on the bolt 10, and its upper-end surface contacts with the lower end surface of pendant collet 11; Bolt 10 underparts contact with platen 13; Platen 13 with shroud 5 and contact.
High pressure drain valve inlet steam pressure is higher, enter the pressure at sealing surface place for reducing medium, valve pocket 6 is interior to be arranged and multistagely shrouds 5 and carry out step-down, the entrance medium is through multistage secondary by valve seal after shrouding 5 step-downs, can effectively reduce the pressure of medium by the sealing pair position, reduce washing away and wear and tear sealing surface.
By the gap in control cofferdam 3, can stop in the front cofferdam 3 of valve closing that large granular impurity enters and weigh wounded sealing surface in the medium.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.
Claims (6)
1. a high pressure steam drainage valve comprises valve body, is installed on the interior valve seat of valve pocket, cooperates with valve seat and carry out the flap of seal operation, the valve rod that is connected with flap, it is characterized in that: be fixed with annular weir on the described valve seat interior surface; Have the ring-shaped throttling relief groove on the described cofferdam.
2. high pressure steam drainage valve according to claim 1 is characterized in that: described ring-shaped throttling relief groove is twice up and down.
3. high pressure steam drainage valve according to claim 1, it is characterized in that: described flap outer surface is provided with annular maze trough.
4. high pressure steam drainage valve according to claim 1 is characterized in that: the annular that is fixedly installed porous around described valve rod in the valve pocket is shrouded.
5. high pressure steam drainage valve according to claim 4, it is characterized in that: described shrouding is provided with three from inside to outside.
6. high pressure steam drainage valve according to claim 4 is characterized in that: comprise that also is used for a fastening hold down gag that shrouds, described hold down gag comprises bolt, pendant collet, dunnage, platen; Described pendant collet is fixed on the valve body; Described dunnage utilizes screw to be placed on the bolt, and its upper-end surface contacts with the pendant collet lower end surface; Described bolt underpart contacts with platen; Described platen contacts with shrouding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220266525 CN202674810U (en) | 2012-06-07 | 2012-06-07 | High-pressure steam drain valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220266525 CN202674810U (en) | 2012-06-07 | 2012-06-07 | High-pressure steam drain valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202674810U true CN202674810U (en) | 2013-01-16 |
Family
ID=47495716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220266525 Expired - Lifetime CN202674810U (en) | 2012-06-07 | 2012-06-07 | High-pressure steam drain valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202674810U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107314152A (en) * | 2017-08-15 | 2017-11-03 | 无锡市亚迪流体控制技术有限公司 | Superhigh-temperature and-pressure steam evacuation valve |
| CN113970059A (en) * | 2021-10-18 | 2022-01-25 | 华能国际电力股份有限公司大连电厂 | Labyrinth valve for main steam drainage |
-
2012
- 2012-06-07 CN CN 201220266525 patent/CN202674810U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107314152A (en) * | 2017-08-15 | 2017-11-03 | 无锡市亚迪流体控制技术有限公司 | Superhigh-temperature and-pressure steam evacuation valve |
| CN107314152B (en) * | 2017-08-15 | 2023-07-14 | 无锡市亚迪流体控制技术有限公司 | Ultrahigh-temperature high-pressure steam vent valve |
| CN113970059A (en) * | 2021-10-18 | 2022-01-25 | 华能国际电力股份有限公司大连电厂 | Labyrinth valve for main steam drainage |
| CN113970059B (en) * | 2021-10-18 | 2023-02-28 | 华能国际电力股份有限公司大连电厂 | Labyrinth valve for main steam drainage |
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130116 |